reference notes/455647_1_EE460-Project-131.pdf
King Fahd University of Petroleum and Minerals
Department of Electrical Engineering
EE Power Electronics Project
Design of a DC Chopper
I. Design of an AC/DC converter with the following the specifications:
AC supply voltage VS = 230 V (rms), 60 Hz.
The DC output voltage V01(dc) = 48 V.
The ripple factor of the output voltage RFV 5%.
II. Design of step-down DC chopper with the following specifications:
Switching (or chopping) frequency, fs = 20 kHz.
Dc input supply voltage VS = 48 V dc, where as the source available is an ac with 230 V
(rms).
Load resistance R = 5 .
The DC output voltage V02(dc) = 12 V.
The peak-to-peak output ripple voltage, VC 2.5%.
The peak-to-peak inductor ripples current, IL 5%.
III. Calculation for both circuits:
(a) Determine the values of Le and Ce for the output LC-filter.
(b) Determine the (peak and rms) voltage ratings and the (average, rms, and the peak) current for
all components and devices.
(c) Verify your design calculation by using Pspice simulation.
Design AC/DC
Circuit
Design DC-DC
Chopper Circuit
AC 5
Output Load
The project will be due on Sunday December 22, 2013.
reference notes/455647_2_DC-20Converters-Design (1).pdf
....-ju"ncv
O.
214 Chapter 5 Dc-Dc Converters
Example 5.10
A buck converter is shown in Figure 5.29. The input voltage is V, == 110 V, the average load
age is Va == 60 V, and the average load current is la == 20 A. The chopping u
1 == 20 kHz. The peak-to-peak ripples are 2.5% for load voltage, 5% for load current, and
for filter Le current. (a) Determine the values of L" L, and Ceo Use PSpice (b) to verify the
suits by plotting the instantaneous capacitor voltage vc, and instantaneous load current iL ;
(c) to calculate the Fourier coefficients and the input current is. The SPICE model pax'ameters
the transistor are IS == 6.734f, BF = 416.4, BR == 0.7371, CJC == 3.638P, CJE::
TR == 239.5N, TF = 30L2P, and that ofthe diode are IS :: 2.2E-15, BV = 1800V, IT ==
Solution
V, = 110 V, va = 60 V, I. == 20 A.
ay: == 0.025 x Va = 0.025 x 60 = 1.5 V
Va 60
R==-=-=311
10 20
From Eq. (5.48),
Va 60
k = - = - = 05455
V, 110 .
From Eq. (5.49),
Is = kla = 0.5455 x 20 == 10.91 A
alL = 0.05 x I. :: 0.05 x 20 == 1 A
M = 0.1 x 10 == 0.1 x 20 == 2 A
8. From Eq. (5.51), we get the value of L.:
VaWs - Va) 60 X (110 - 60)
Le = MIV, = 2 x 20 kHz x 110 = 681.82 ~H
From Eq. (5.53) we get the value of Ce:
2c == ,11
e ,lV, X 81 1.5 x 8 X 20 kHz == 8.33 ~F
L4
+
+
Vs 110 V
FIGURE 5.29
o~-----------+----------~--------~Buck converter.
5.12 Chopper Circuit Design 215
Vs
L
8
v, OV
O~----------------------------*-------~~------~
(a) Circuit
Vgj
2ov~______________1~________-L____--'
o 27.28 IlS SOIlS
(b) Control voltage
FIGURE 5.30
Buck chopper for PSpice simulation.
Assuming a linear rise of load current i ...
AMANI JAMES as the electronic circuit designer , I have designed the dual power supply with +/-12V output voltage. if you are interested with this , contact me with amanirah@gmail.com. also I can design the PCB for the same circuit
Assignment 1 Description Marks out of Wtg() Due date .docxfredharris32
Assignment 1
Description Marks out of Wtg(%) Due date
Assignment 1 200 20 28 August 2015
Part A: Comparators and Switching (5%)
(1) Signal limit detector
Use a 339 comparator, a single 74LS02 quad NOR gate and a +5V power supply only to
design a circuit which will detect when a voltage goes outside the range +2.5V to +3.5V
and such that an LED lights and stays lit. Provide a manual reset to extinguish the LED.
Design hints
1. The circuit has an analog input and a digital output so some form of comparator circuit
is required. There are two thresholds so two comparators are required, with the analog
input applied to both. This arrangement is sometimes known as a window detector.
2. Arrange the output of the comparators to be +5V logic levels, and combine the two
outputs logically to produce one signal which is for example, high for out-of-range, and
low for within-range.
3. Latch the change from in-range to out-of-range.
Design procedure
1. Start at the output and work backwards.
2. Select a latch circuit (flip-flop) and determine what combinations of inputs are needed to
latch and then reset it, ensuring that the LED is connected correctly with regard to both
logic and current flow.
3. Determine the logic needed to combine two comparator outputs in such a way as to
correctly operate the latch.
4. Choose comparator outputs which will correctly drive the logic. Remember that the
reference voltage at the input of the comparator may be at either the + or – input.
5. Choose resistors to provide the correct reference voltages.
Note: You will need to consult data for both the 74LS02 and the 339 (see data sheets).
Test
It is strongly recommended that you assemble and test your circuit.
(2) MOSFET Switching
Find out information on the operation of, and configuring of, MOSFETs to be used in
switching circuits. In particular note the differences between BJTs and MOSFETs in this
role. Draw up a table to highlight the differences and hence the pros and cons on each
device for particular situations (eg. Switching high-to-low or low-to-high (ie. P or N type),
high or low current switching, low or high voltage switching).
Consider the following BJT switching circuit. Analyse the operation of the circuit to
understand the parameters involved. Choose suitable replacement MOSFETs to be used
ELE2504 – Electronic design and analysis 2
instead of the output switching BJTs in the given circuit. Include any necessary circuit
changes for the new devices to operate so as to maintain the circuit’s required parameters.
Where Vcc = 12V and Relay resistance = 15Ω .
ELE2504 – Electronic design and analysis 3
Part B: Transistor amplifier design (6%)
Design and test a common emitter amplifier using the circuit shown and the selected
specifications.
Specifications
Get your own spec ...
This paper addresses a novel approach for designing and modeling of the isolated
flyback converter. Modeling is done without parasitic as well as with parasitic components.
A detailed analysis, simulation and different control strategy are conferred for flyback
converter in continuous conduction mode (CCM). To verify the design and modeling at
primary stage, study of the converter is practiced in CCM operation for input AC voltage
230V at 50Hz and output DC voltage of 5V and 50W output power rating using PSIM 6.0
software. Simulation result shows a little ripple in output of the converter in open loop. Finally
in order to evaluate the system as well as response of the controller, flyback converter is
simulated using MATLAB. This work, highlighting the modeling when the system have
transformer and facilitate designers to go for it when they need one or more than one output
for a given application upto 150W
Ethical Case Study 2Gloria is a housekeeper in an independent li.docxdebishakespeare
Ethical Case Study 2
Gloria is a housekeeper in an independent living community. While walking through a hallway, she noticed the door of a resident’s apartment was left open, which was unusual. She stepped in to check on Louis, and quickly realized that he was on the phone in his living room. As she turned to leave, she over heard him saying that he had stopped taking all of his medications because he was ready to die. She could tell that the person that he was speaking with was trying to reason with him. Gloria knows that Louis has a very loving and involved daughter that visits him every Saturday. She left the room determined that she would tell his daughter what she heard when she saw her on Saturday.
You have to answer all the questions below
What issues are facing Gloria? Discuss the possible ethical principles at play and your recommendation to Gloria.
Hint: Confidentiality, Beneficence, Self-determination
.
Ethical consideration is important in nursing practice, especial.docxdebishakespeare
Ethical consideration is important in nursing practice, especially when providing care to patients from diverse sociocultural backgrounds. The population of the United States comprises various ethnic/racial groups with different cultural and social beliefs, practice, norms, and values. There is an increasing disparities on the incidence and prevalence of type 2 diabetes among different communities in the United States. According to the Center for Disease Control and Prevention (CDC), Hispanics and African Americans have the highest incidence and prevalence of type 2 diabetes in the country (Concha, Mayer, Mezuk, & Avula, 2016). Caring for patients from different ethnic/racial groups require consideration of ethical principles and concepts to prevent ethical issues that may arise during nurse-patient interaction.
Recently, I cared for patient with type 2 diabetes mellitus who had been hospitalized for more than two weeks due to acute hypertension, partial loss of vision. Also, the patient had a chronic diabetic foot ulcer. The analysis of his medical history revealed that the diabetic foot ulcer had developed in the last two years and had never healed. The patient was so worried about his health status and kept asking when he was going to be discharged from the hospital. The patient came from the Hispanic community, which is one of minority groups with the highest incidence and prevalence of type 2 diabetes mellitus in the country. Being a culturally competent registered nurse, I had an obligation to take into account the specific ethnic background of the patient when providing care. Considering patient’s ethnic/racial background is important in providing quality, holistic, and patient-centered care based their health concerns, preferences, and values (Concha et al., 2016).
When collecting subjective data for analysis and planning for the care. I asked the patient about his perceptions about the possible causes of type 2 diabetes that he was suffering from. Hispanics have different beliefs in the causation of diabetes mellitus (Frieden, 2016). First, the patient believed that diabetes is a temporary condition that is not fatal. Second, the patient narrated a story that attempts to identify the cause of diabetes and concluded that they believe that people with “good diabetes” do not experience a lot of complications. The Hispanics use the term “good diabetes” when referring to the type of diabetes that do not require insulin for therapeutic purposes; non-insulin-dependent diabetes mellitus (T2DM) (Frieden, 2016). Also, the patient had a fatalistic attitude and believed that his health condition is likely to be a punishment from God.
The patient had a low health literacy level because caregivers had encouraged him to engage in some physical exercise and adopt a self-management approach as a way of controlling and preventing complications related to his condition, but he never implemented them. Also, the pat.
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AMANI JAMES as the electronic circuit designer , I have designed the dual power supply with +/-12V output voltage. if you are interested with this , contact me with amanirah@gmail.com. also I can design the PCB for the same circuit
Assignment 1 Description Marks out of Wtg() Due date .docxfredharris32
Assignment 1
Description Marks out of Wtg(%) Due date
Assignment 1 200 20 28 August 2015
Part A: Comparators and Switching (5%)
(1) Signal limit detector
Use a 339 comparator, a single 74LS02 quad NOR gate and a +5V power supply only to
design a circuit which will detect when a voltage goes outside the range +2.5V to +3.5V
and such that an LED lights and stays lit. Provide a manual reset to extinguish the LED.
Design hints
1. The circuit has an analog input and a digital output so some form of comparator circuit
is required. There are two thresholds so two comparators are required, with the analog
input applied to both. This arrangement is sometimes known as a window detector.
2. Arrange the output of the comparators to be +5V logic levels, and combine the two
outputs logically to produce one signal which is for example, high for out-of-range, and
low for within-range.
3. Latch the change from in-range to out-of-range.
Design procedure
1. Start at the output and work backwards.
2. Select a latch circuit (flip-flop) and determine what combinations of inputs are needed to
latch and then reset it, ensuring that the LED is connected correctly with regard to both
logic and current flow.
3. Determine the logic needed to combine two comparator outputs in such a way as to
correctly operate the latch.
4. Choose comparator outputs which will correctly drive the logic. Remember that the
reference voltage at the input of the comparator may be at either the + or – input.
5. Choose resistors to provide the correct reference voltages.
Note: You will need to consult data for both the 74LS02 and the 339 (see data sheets).
Test
It is strongly recommended that you assemble and test your circuit.
(2) MOSFET Switching
Find out information on the operation of, and configuring of, MOSFETs to be used in
switching circuits. In particular note the differences between BJTs and MOSFETs in this
role. Draw up a table to highlight the differences and hence the pros and cons on each
device for particular situations (eg. Switching high-to-low or low-to-high (ie. P or N type),
high or low current switching, low or high voltage switching).
Consider the following BJT switching circuit. Analyse the operation of the circuit to
understand the parameters involved. Choose suitable replacement MOSFETs to be used
ELE2504 – Electronic design and analysis 2
instead of the output switching BJTs in the given circuit. Include any necessary circuit
changes for the new devices to operate so as to maintain the circuit’s required parameters.
Where Vcc = 12V and Relay resistance = 15Ω .
ELE2504 – Electronic design and analysis 3
Part B: Transistor amplifier design (6%)
Design and test a common emitter amplifier using the circuit shown and the selected
specifications.
Specifications
Get your own spec ...
This paper addresses a novel approach for designing and modeling of the isolated
flyback converter. Modeling is done without parasitic as well as with parasitic components.
A detailed analysis, simulation and different control strategy are conferred for flyback
converter in continuous conduction mode (CCM). To verify the design and modeling at
primary stage, study of the converter is practiced in CCM operation for input AC voltage
230V at 50Hz and output DC voltage of 5V and 50W output power rating using PSIM 6.0
software. Simulation result shows a little ripple in output of the converter in open loop. Finally
in order to evaluate the system as well as response of the controller, flyback converter is
simulated using MATLAB. This work, highlighting the modeling when the system have
transformer and facilitate designers to go for it when they need one or more than one output
for a given application upto 150W
Ethical Case Study 2Gloria is a housekeeper in an independent li.docxdebishakespeare
Ethical Case Study 2
Gloria is a housekeeper in an independent living community. While walking through a hallway, she noticed the door of a resident’s apartment was left open, which was unusual. She stepped in to check on Louis, and quickly realized that he was on the phone in his living room. As she turned to leave, she over heard him saying that he had stopped taking all of his medications because he was ready to die. She could tell that the person that he was speaking with was trying to reason with him. Gloria knows that Louis has a very loving and involved daughter that visits him every Saturday. She left the room determined that she would tell his daughter what she heard when she saw her on Saturday.
You have to answer all the questions below
What issues are facing Gloria? Discuss the possible ethical principles at play and your recommendation to Gloria.
Hint: Confidentiality, Beneficence, Self-determination
.
Ethical consideration is important in nursing practice, especial.docxdebishakespeare
Ethical consideration is important in nursing practice, especially when providing care to patients from diverse sociocultural backgrounds. The population of the United States comprises various ethnic/racial groups with different cultural and social beliefs, practice, norms, and values. There is an increasing disparities on the incidence and prevalence of type 2 diabetes among different communities in the United States. According to the Center for Disease Control and Prevention (CDC), Hispanics and African Americans have the highest incidence and prevalence of type 2 diabetes in the country (Concha, Mayer, Mezuk, & Avula, 2016). Caring for patients from different ethnic/racial groups require consideration of ethical principles and concepts to prevent ethical issues that may arise during nurse-patient interaction.
Recently, I cared for patient with type 2 diabetes mellitus who had been hospitalized for more than two weeks due to acute hypertension, partial loss of vision. Also, the patient had a chronic diabetic foot ulcer. The analysis of his medical history revealed that the diabetic foot ulcer had developed in the last two years and had never healed. The patient was so worried about his health status and kept asking when he was going to be discharged from the hospital. The patient came from the Hispanic community, which is one of minority groups with the highest incidence and prevalence of type 2 diabetes mellitus in the country. Being a culturally competent registered nurse, I had an obligation to take into account the specific ethnic background of the patient when providing care. Considering patient’s ethnic/racial background is important in providing quality, holistic, and patient-centered care based their health concerns, preferences, and values (Concha et al., 2016).
When collecting subjective data for analysis and planning for the care. I asked the patient about his perceptions about the possible causes of type 2 diabetes that he was suffering from. Hispanics have different beliefs in the causation of diabetes mellitus (Frieden, 2016). First, the patient believed that diabetes is a temporary condition that is not fatal. Second, the patient narrated a story that attempts to identify the cause of diabetes and concluded that they believe that people with “good diabetes” do not experience a lot of complications. The Hispanics use the term “good diabetes” when referring to the type of diabetes that do not require insulin for therapeutic purposes; non-insulin-dependent diabetes mellitus (T2DM) (Frieden, 2016). Also, the patient had a fatalistic attitude and believed that his health condition is likely to be a punishment from God.
The patient had a low health literacy level because caregivers had encouraged him to engage in some physical exercise and adopt a self-management approach as a way of controlling and preventing complications related to his condition, but he never implemented them. Also, the pat.
Ethical Competency Writing Assignment Description
PHI 108 Spring 2019
Dr. David M. DiQuattro
March 5, 2019
1 Basic Assignment Description
For your ethical competency writing assignment, you will write analyze a disagreement between two authors/viewpoints
that we discussed this semester. I am calling the assignment a critical disagreement analysis. Below I will
provide a number of examples of disagreements between the authors we discuss this semester. Your
paper will have the following components
1. Hone the disagreement
• I want you to start by taking my general statement of disagreement and providing your own clear specifics
that focus on particular claims or passages. Here you are taking my starting point, but providing your
own framing of the disagreement that will provide focus for your paper.
• You will hone your statement of the disagreement in a way that sets things up for the next parts of the
paper.
• For example:
– In number 2 below, you will identify a specific critique of Rawls from either Kittay or Noddings.
You need to explain where the disagreement is and set the stage for a fruitful dialogue to follow in
the paper.
• This part of the paper should be focused. You should discuss the two views in a way that sets the stage
for your objection and response.
• In the opening part of the paper you need to preview what is ahead - you may only write this part late
in the writing process, but you need to provide a clear preview of where the rest of the paper goes.
2. Provide the best objection from one point of view to another
• I want you to do more than just state the two sides of the issue in this paper. I want you to bring the
authors into dialogue. You will do this by articulating an objection to one position from the point of
view of the other, then responding to the objection.
– You want your objection to be more than just restating a point where the authors diagree. Here’s
what I mean by just restating, as an example:
1
Kant believes that there are absolute rules that should be followed without regard to conse-
quences. The strongest utilitarian objection to this is that Kant disregards the importance
of how an action affects overall happiness.
– The above is an example of what not to do. That way of stating things won’t get you far because
it is just a re-stating of a key difference between Kant and utilitarianism.
• You should look for an objection that raises a new question for the other point of view, or points out
an unforeseen implication of the view. In some way it should move discussion forward. I am not
asking you to discover something that has never been said about these issues. I just want
you to deepen your understanding of the two views by raising a serious objection to one
position, then responding to it.
– In some way the objection should force you to think in new ways about the position objected to.
• In this section you should explain as clearly as you can how the objection presents a proble.
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Ethical Case Study
An example of unethical treatment of participants was the Tuskegee syphilis experiment, who believed they were being treated for “bad blood”
“Bad blood”: A term used to describe problems like anemia, fatigue, and syphilis
Those in the control group were not given treatment for syphilis, and many died
Why would this research study not fall under the present ethical and legal restraint? Please support your answer with scholarly articles.
.
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Ethical Awareness
DEFINITION
:
a brief definition of the key term followed by the APA reference for the term; this does not count in the word requirement.
SUMMARY
:
Summarize the article in your own words- this should be in the
150-200 word range
. Be sure to note the article's author, note their credentials and why we should put any weight behind his/her opinions, research or findings regarding the key term.
DISCUSSION
:
Using
300-350 words
, write a brief discussion, in your own words of how the article relates to the selected chapter Key Term. A discussion is not rehashing what was already stated in the article, but the opportunity for you to
add value by sharing your experiences, thoughts, and opinions
.
This is the most important part of the assignment.
REFERENCES
:
All references must be listed at the bottom of the submission--in APA format.
Please follow the above format, No Plagiarism, APA format, add citations and references.
.
ETHICAL CHALLENGES
JOYCAROLYNE MUIGAI
NTC/302
5/26/2020
INTRODUCTION
Ethics in business is mainly concerned with the good or bad actions and behaviors that often take place in the world of business
Ethical challenges have often resulted from lack of a clear and distinctive description of norms that ought to be used
Business ethics hence help economists to think productively along moral dimensions on matters regarding policy problems
Ethics could be a complex aspect in business as it influences all aspect of business as it provides the most adequate action that ought to be taken. Ethics causes huge conflicts as morality may not be clearly definitive and situations in many cases greatly vary (Nuseir & Ghandour, 2019).
2
Ethics in intellectual property
Intellectual property rights is a socio-economic tool that create some form of monopoly for firms to charge a price for their innovations
For many innovative firms, it is a timely and expensive to come up with new innovations for the market yet other competitors in the market will attempt to copy new design of products launched.
Firms have however, taken advantage of intellectual property rights by asking for high prices for products
Intellectual property rights are a tool that protects innovators from losing their innovations to counter-feighting firms in the market. However many have leveraged this property rights to put high prices on their products to maximize their profits from their innovations (Sonderholm, 2018).
3
Policy statement on Ethics in intellectual property
To ensure easy and right access of new innovated products, it is important to come up with an ethical way to reduce exploitation by firms.
Firms can take up he differential pricing strategy that has in the past been articulated to be of great influence and guarantees the firm’s profitability
Through differentia; pricing, the protected innovation can be offered at different prices based on the socio-economic demographics of the area. A product can be offered at a cheaper price at a low-earning area while it is offered at different price at a different location (Sonderholm, 2018).
4
Corruption index
Corruption is seen as legal complication that is often manifested in the absence of controls over power
Corruption in business could come in many ways but it is always some grease payment paid to expedite decision or transactions
Connection are as well viewed as to have an effect on business processes as they have a negative connotation regardless of their informality.
In many business ventures, corruption has been indicated to grow over time and is often seen in terms of exchange of favors for the sake of expedition of certain process to take a shorter time without necessarily having to undergo the require stipulated process (Samuel, 2019).
5
Policy statement in corruption index
Transparency is key in business processes hence all actions need to be accounted for
As a way to reduce the corruption index and subsequ.
Ethical Conduct of Researchpower point from this document, 1.docxdebishakespeare
Ethical Conduct of Research
power point from this document, 15 slides
Introduction
Depending on the context of the study, researchers often encounter ethical dilemmas that are associated with respect for privacy, establishment of honest and open interactions, and avoidance of misrepresentation. From an ethical standpoint, such challenging circumstances may surface if researchers are grappling with conflicting issues and have to choose between different methodological approaches in complex circumstances. In such circumstances, disagreements among different components including participants, researchers, researchers’ disciplines, the financing organization, and the society might be inevitable. Therefore, there are numerous ethical concerns that should be taken into account when undertaking studies that deal with human subjects. Understanding ethical principles can guide researchers to conduct studies that safeguard the wellbeing of human subjects.
Overview of the Research
In a research work titled
Resilience of People Living with HIV/AIDS in Indonesia: a Phenomenological Study
, Kumboyono et al. (2018) observe that HIV/ AIDS is among the most prevalent and expanding communicable diseases on the planet. The number of individuals who are diagnosed with HIV/AIDS continues to skyrocket every year in Indonesia and other parts of the world. According to Kumboyono et al. (2018), individuals who suffer from HIV/AIDS often plunge themselves into a series of crises, which indicate the challenges of living with the chronic pathological condition. As such, resilience is one distinct phenomenon that is common among persons living with the diseases Indonesia, a pattern that indicates the results of current health management and expectations of HIV/AIDS patients for better and improved health outcomes. In light of this concern, Kumboyono et al. (2018) undertook a study that sought to examine the mechanism of resilience in Indonesian people living with HIV/AIDS and the factors that influence their specific mechanisms.
Using qualitative phenomenological design, the researchers sampled a total of 27 people living with HIV/AIDS from a primary health care institution in Malang City, East Java, Indonesia. The participants were selected from different socioeconomic, gender, and sexual orientations. The researchers informed participants about the conduct and processes involved in the study, resulting in their consent to participate in the interview process. The findings of the study indicated that the diagnosis of HIV/AIDS reflects the onset of psychological and social distress. Moreover, Kumbomoyo et al. (2018) found that the spiritual response that follows diagnosis is a state that is characterized by crises. As a consequence, the coping strategies and understanding of life by HIV patients is a definite sign on resilience. Based on these findings, Kumbomoyo et al. (2018) infer that HIV/AIDS is a chronic infection that has the potential to induce the unique .
Ethical Approaches
An Overview of:
(1)Consequential,
(2) Nonconsequential, and
(3) Virtue Ethics Theories
What is Ethics?
Ethics is the study of those values that relate to our moral conduct,
including questions of good and evil, right and wrong, and moral responsibility.
Consequentialist Theoretical Approach:
-Consequentialist theories claim that the morality of an action depends only on its consequences.
-It only considers the result of actions and not principles or rules in determining morality.
1
Three (3) Types of Consequentialist Theories:
-Ethical Egoism argues that each person should act in his/her own self-interest.
-Act Utilitarianism argues that each person should act in a way that produces the greatest happiness
for everyone.
-Rule Utilitarianism argues that each person should follow rules that tend to produce the greatest
happiness for everyone.
Weaknesses of Consequentialist Theories
-Requires person to predict the future and all possible outcomes.
-Can easily be used to justify questionable actions (the ends justifies the means).
2
Nonconsequentialist Theoretical Approach:
Nonconsequentialist theories claim that the morality of an action depends on principles or other factors
that are not related to consequences.
Two (2) Types of Nonconsequentialist Theories:
-Divine command theory argues that we should obey the laws of God.
-Kant’s Categorical Imperative states that we should always act in a way that is based on reason, duty,
and would be considered ethical if everyone acted in the exact same way. Also, people should be
treated as an end and not as a means.
Weaknesses of Nonconsequentialist Theories: Self-Challenge Question:
Question: What might prove a problem in a country so diverse as the U.S. with regards to
Nonconsequentialist theories?
When you are ready check the expert’s response.
3
https://kapextmediassl-a.akamaihd.net/business/CS125/1902c/ethics_challenge_expert1.pdf
Virtue Ethics Theoretical Approach:
-Virtue ethics seeks to identify character traits of a moral person and develop those with the idea that the
virtuous person will act in a virtuous manner. It does not look to principles or consequences.
-Virtue ethics was developed among the ancient Greek philosophers such as Aristotle and the Chinese
teacher and philosopher Confucius.
-Virtue ethics enjoys modern support as an approach that avoids many of the problems with
Consequential and Nonconsequential ethical theories.
Weaknesses of Virtue Theory
-Difficulty in determining just which characteristics are virtues
-Justification for respecting a virtue usually brings one back to either consequences or principles.
-Difficulty in applying it to specific situations
4
Example of all Three Theoretical Ethical Approaches:
Scenario: The air quality in a particular city Y is so polluted, people are getting physically ill and are on .
Ethical and Professional Issues in Group PracticeThose who seek .docxdebishakespeare
Ethical and Professional Issues in Group Practice
Those who seek to be professional group leaders must be willing to examine both their ethical standards and their level of competence. Among the ethical issues treated in this chapter are the rights of group members, including informed consent and confidentiality; the psychological risks of groups; personal relationships with clients; socializing among members; the impact of the group leader’s values; addressing spiritual and religious values of group members; working effectively and ethically with diverse clients; and the uses and misuses of group techniques. In my opinion, a central ethical issue in group work pertains to the group leader’s competence. Special attention is given to ways of determining competence, professional training standards, and adjuncts to academic preparation of group counselors. Also highlighted are ethical issues involved in training group workers. The final section outlines issues of legal liability and malpractice.
As a responsible group practitioner, you are challenged to clarify your thinking about the ethical and professional issues discussed in this chapter. Although you are obligated to be familiar with, and bound by, the ethics codes of your professional organization, many of these codes offer only general guidelines. You will need to learn how to make ethical decisions in practical situations. The ethics codes provide a general framework from which to operate, but you must apply these principles to concrete cases. The Association for Specialists in Group Work’s (2008) “Best Practice Guidelines” is reproduced in the Student Manual that accompanies this textbook. You may want to refer to these guidelines often, especially as you study Chapters 1 through 5.
The Rights of Group Participants
My experience has taught me that those who enter groups are frequently unaware both of their basic rights as participants and of their responsibilities. As a group leader, you are responsible for helping prospective members understand what their rights and responsibilities are. This section offers a detailed discussion of these issues.
A Basic Right: Informed Consent
If basic information about the group is discussed at the initial session, the participants are likely to be far more cooperative and active. A leader who does this as a matter of policy demonstrates honesty and respect for group members and fosters the trust necessary for members to be open and active. Such a leader has obtained the informed consent of the participants.
Informed consent is a process that begins with presenting basic information about group treatment to potential group members to enable them to make better decisions about whether or not to enter and how to participate in a group (Fallon, 2006). Members have a right to receive basic information before joining a group, and they have a right to expect certain other information during the course of the group. Discussing informed consent is not a one-t.
Ethical AnalysisSelect a work-related ethical scenario that .docxdebishakespeare
Ethical Analysis
Select a work-related ethical scenario that you (or someone close to you) have experienced. Organizations and names should be changed when identifying references in the assignment. Compose an essay that addresses the following requirements:
Identify the key positions, titles, and assigned responsibilities in the organization.
Discuss and illustrate the individual pressures faced and how the issues were handled or delegated to another position.
Describe how changing attitudes and behaviors evolved as the incidents occurred.
Compare and contrast the behaviors in the scenario with the philosophical theories of ethical decision-making that are referenced in Unit II. Examples may include Utilitarianism or Deontology application.
Illustrate any mishandling of the decision-making process that resulted in lessons learned.
Summarize what you have learned from an analysis of this event.
Your response should be at least 500 words in length (not including the references page) in APA style. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citation.
.
Ethical (Moral) RelativismIn America, many are comfortable describ.docxdebishakespeare
Ethical (Moral) Relativism
In America, many are comfortable describing ethics as follows: “Well, what’s right for me is right for me and what’s right for you is right for you. Let’s just agree to disagree.” This is an affirmation of what philosophers call
individual
or
subjective moral relativism
. In this understanding of relativism, morality is a matter of individual feelings and personal preference. In individual moral relativism, the determination of what is right and wrong in a situation varies according to the individual. Moral relativists do not believe in natural law or universal truths.
Cultural moral relativism
puts culture at the forefront of relative ethical decision-making. It says the individual must include the precepts of his or her culture as a prominent part of the relativistic moral action.
Lawrence
Kohlberg,
a prominent psychologist known for recognizing moral stages of development, takes it a step farther saying cultural relativists are persons stuck in the “
Conventional
Stage” of ethical development
.
In your paper, please define individual moral relativism and cultural moral relativism in detail, noting how they differ from each other, their strengths and weaknesses, and give your position on Kohlberg’s stance on ethical relativism.
What aspects of ethical relativism do you identify and agree with? What aspects do you disagree with? Give a personal example that illustrates your stance on ethical relativism, describing how you made a moral decision in an ethical dilemma. Include at least two references to support your thoughts.
Post a 500-word paper to the
M4: Assignment 2 Dropbox
by due
Wednesday, April 9, 2014
. All written assignments and responses should follow proper citation rules for attributing sources. Please use Microsoft Word spelling/grammar checker. Be mindful of plagiarism policies.
.
Ethical Analysis on Lehman Brothers financial crisis of 2008 , pleas.docxdebishakespeare
Ethical Analysis on Lehman Brothers financial crisis of 2008 , please include bibliography and footnotes and answer the questions below.
It must be between 5-7pgs.
1. What was the case about?
2. Who was (were) the individual(s) and company (ies) involved?
3. When did it happen?
4. Why did it happen?
5. How did it come to the attention of the media?
6. What was the outcome of the case?
7. How could this case been avoided?
8. What can we learn from the case?
.
Ethical Analysis on Merrill lynch financial crisis of 2008 , please .docxdebishakespeare
Ethical Analysis on Merrill lynch financial crisis of 2008 , please include bibliography and footnotes and aswer the questions below.
It must be between 5-7pgs.
1. What was the case about?
2. Who was (were) the individual(s) and company (ies) involved?
3. When did it happen?
4. Why did it happen?
5. How did it come to the attention of the media?
6. What was the outcome of the case?
7. How could this case been avoided?
8. What can we learn from the case?
.
ETHC 101
Discussion Board Reply Grading Rubric
Criteria
Levels of Achievement
Content 70%
Advanced
Proficient
Developing
Not Present
Points Earned
Word Count
15 points
Word count is between 500 and 600 words.
11 to 14 points
Word count exceeds 600 words.
1 to 10 points
Word count is less than 500 words.
0 points
Not present
Style
10 points
Reply offers constructive feedback to a classmate in a manner that is polite, rationally argued, and not overly emotional.
7 or 9 points
Reply offers constructive feedback to a classmate but with some deficiency of politeness, reasonableness, and/or dispassion.
1 to 6 points
Reply offers little to no constructive feedback, and/or is strongly impolite, and/or is very emotional.
0 points
The post is not a reply (it is off-topic).
Understanding
10 points
Reply utilizes many of the concepts and technical vocabulary taught in the class in a manner that demonstrates accurate understanding.
7 to 9 points
Reply utilizes some of the concepts and technical vocabulary taught in the class in a manner that demonstrates accurate understanding.
1 to 6 points
Reply utilizes some of the concepts and technical vocabulary taught in the class but sometimes in ways that suggest that they are not correctly understood.
0 points
Reply does not utilize the concepts and technical vocabulary taught in the class.
Structure 30%
Advanced
Proficient
Developing
Not Present
Points Earned
Spelling, Punctuation, and Grammar
10 points
Reply is written in paragraph form and is devoid of spelling, punctuation, and grammar errors.
7 or 9 points
Reply is not written in paragraph form and/or has occasional spelling, punctuation, and grammar errors.
1 to 6 points
Reply is not written in paragraph form and has numerous spelling, punctuation, and grammar problems.
0 points
Not present
Turabian formatting
5 points
Direct references and/or allusions to outside resources (such as the textbooks) are present and are cited using footnotes in current Turabian format.
4 points
Direct references and/or allusions to outside resources (such as the textbooks) are present but are cited otherwise than using footnotes in current Turabian format.
1 to 3 points
Direct references and/or allusions to outside resources (such as the textbooks) are present but the sources are not cited. (Note: if plagiarism is present, that requires additional corrective action.)
0 points
No direct references and/or allusions to outside resources are present.
Total
/50
Instructor's Comments:
Page 1 of 1
For this untimed, open-resource essay exam, answer each question thoroughly and clearly, and ground it in course reading material. Essay answers must be more than 3 or 4 brief sentences, but kept within the bounds of an essay exam (4 - 6 paragraphs). All your writing must be in your own words. Paraphrase (restate what you read) rather than copying material from the course textbook or the Internet. No copying is permitted in this course and doing so will result in zero points on th.
Ethical and Human Rights Concerns in Global HealthChapter Fou.docxdebishakespeare
Ethical and Human Rights Concerns in Global Health
Chapter Four
Chapter four: Ethical and human rights concerns in global health.
As with any area of health, global health is affected by the issues of ethics and right for sound health outcome. In this chapter we will explore ethical and human rights concerns, some of the central treaties and conversions related to human rights, some historically significant cases in human subject research and key principles for making critical decisions in health research.
1
Failure to respect human rights is often associated with harm to human health
Health research with human subjects puts people at risk for the sake of other people’s health
Health investments must be made in fair ways since resources are limited
The Importance of Ethical and Human Rights Issues in Global Health
Access to the health care is human right and failure to respect this right might causes harm for health. For example, the stigma associated with HIV, TB and leprosy makes it difficult for the patient to obtain necessary health care, it not only cause harm to individual health but as a whole community health even. For example, if a TB patient remains untreated by the health care workers, then that individual could be a source of infection for other people.
Health research with human subject in particular in low income countries where study participants may not have other option to obtain the medication might become a proxy of clinical trial for other people .Lastly, fair decision in health investment is critical because in low income countries where health resources are scare difficult decisions need to be made depending on the priority and severity of disease.
2
The Foundations for Health and Human Rights
Universal Declaration of Human Rights and other legally binding multilateral treaties
Governments are obliged to respect, protect, and fulfill the rights they state
International Bill of Human Rights is the cornerstone for human rights. This bill include couple of documents including the Universal declaration of human rights that was officially declared in 1948, that place obligation on Government to respect , protect, and fulfill the rights of the state.
3
Selected Human Rights
The Rights-Based Approach
Assess health policies, programs, and practices in terms of impact on human rights
Analyze and address the health impacts resulting from violations of human rights when considering ways to improve population health
Prioritize the fulfillment of human rights
In considering human right, first we are going to examine the issue of right based approach. Some global health advocates argue that this approach, which thinks that fulfillment of people’s human right is conducive to their health, should be followed in global health. This means we need to assess health policies, programs or practices in terms of its impact on human right and analyze the health impacts from the perspective of violation of human rights
.
Ethical & Legal Aspects in Nursing WK 14Please answer the .docxdebishakespeare
Ethical & Legal Aspects in Nursing WK 14
Please answer the following Discussion Question. Please be certain to answer the four questions on this week DQ and to provide a well-developed and complete answer to receive credit.
Case Study, Chapter 23, Professional Identity and Image
Nursing care is frequently perceived by the public as simple and unskilled. Many male nurses live in fear of how their caring actions might be interpreted. Many nurses hold that stereotypes about the profession are true, just as the general public does. Public identity and image has been a struggle for nurses for a long time. The greater public clearly does not understand what professional nursing is all about, and the nursing profession has done a poor job of correcting long-standing, historically inaccurate stereotypes.
1. What are the common nursing stereotypes?
2. What was the role of the Center for Nursing Advocacy? Discuss the role of Truth about Nursing in addressing inaccurate or negative portrayals of nursing in the media and the process they use to raise public and professional awareness of the issues surrounding nursing public image?
3. What are some of the ways of changing nursing’s image in the public eye?
4. One of the most important strategies needed to change nursing’s image is to change the image of nursing in the mind of the image makers. What are some of the key ways for nurses to interact with the media?
INSTRUCTIONS:
APA FORMAT
IN TEXT CITATIONS WITH 3 REFERENCES NO LESS THAN 5 YEARS
.
EthernetSatellite dishInternational Plastics, Inc. - C.docxdebishakespeare
Ethernet
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International Plastics, Inc. - China Headquarters
Corp
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12 GB Ram
1 TB HD
27" monitors
Satellite base station
NAS
Iomega
P800M
24 Port Hub
Linksys EF2H24
WIN
Exchange
Server
WIN
Network
Server
UNIX
ERP/MRP
Server
ERP = SAP
UPS:
Serve the entire server room; additional UPS in satellite base station.
IBM
pSeries
6E4 Multipocessor
16GB RAM
1 TB HD
2 ea IBM
HS20
Blade Svrs
2 X XEON
2.8 GHz
1 GB RAM
1 GB Fiber backbone
3 ea Phaser 6700 color Printers
100 base T
35 ea Dell
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4 GB RAM
500 GB HD
WIN 7 OS
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8 HP Laserjet BW printers – P3015dn
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R&D
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1 TB HD
27" monitors
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NAS
Iomega
P800M
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Exchange
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Network
Server
UNIX
ERP/MRP
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UPS:
Serve the entire server room; additional UPS in satellite base station.
IBM
pSeries
6E4 Multipocessor
16GB RAM
1 TB HD
2 ea IBM
HS20
Blade Svrs
2 X XEON
2.8 GHz
1 GB RAM
1 GB Fiber backbone
3 ea Phaser 6700 color Printers
100 base T
35 ea Dell
Vostro
i3 3.3 Ghz
4 GB MB RAM
GB HD
WIN 7 OS
Office 2007
12
8
8
7
2 ea 24 port switches
Cisco 2950
35 IP
Phones
Gateway/Switch
1 HP Plotter
Identical to other WIN servers
VOIP/Data
Router
T3 to
outside network
Gateway/Switch
VOIP/Data
Router
Ka Band
ATM AA1 PVC 51.8 Mb data rate, AES end-to-end
8 HP Laserjet BW P4510 Printers: 2 in each department.
2 HP color Multifunction Office Jet 8600. 1 in corporate, 1 in marketing
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45 office computers
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4 GB RAM
500 MB HD
Manufacturing
Floor
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Connection to
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2 - HP Laserjet M602n
HP CP4225n
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HP – BL 460 P
Print, file, Exchange, local ERP back to home office
Cisco Catylst 3580 Ethernet switch 48 port
Cisco catalyst 3560
Ethernet switch 24 port
APC Smart-UPS
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International Plastics, Inc.
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2.
Ethanolv.DrizinUnited States District Court, N.D. Iowa, Eastern .docxdebishakespeare
Ethanolv.Drizin
United States District Court, N.D. Iowa, Eastern DivisionFeb 7, 2006
No. C03-2021 (N.D. Iowa Feb. 7, 2006) Copy Citation
No. C03-2021.
February 7, 2006
Be a better lawyer. Casetext is legal research for lawyers who want do their best work.
ORDER
JOHN JARVEY, Magistrate Judge
This matter comes before the court pursuant to trial on the merits which commenced on January 23, 2006. The above-described parties have consented to jurisdiction before a United States Magistrate Judge pursuant to 28 U.S.C. § 636(c). The court finds in favor of the plaintiff and awards compensatory damages in the amount of $3,800,000 and punitive damages in the amount of $7,600,000.
In this case, the plaintiff brings numerous theories of recovery against defendant Jerry Drizin arising out of the misappropriation of escrow funds that were to serve as security for financing for the construction of an ethanol plant in Manchester, Iowa. The plaintiff contends that defendant Drizin, in concert with others, knowingly converted funds from an escrow account that were not to have been spent on anything without the plaintiff's prior written permission. Defendant Drizin contends that his only client and only duty of loyalty was to a Nigerian citizen living in Munich who caused the funds to be sent to bank accounts controlled by Defendant Drizin. The court makes the following findings of fact and conclusions of law.
In 2000 in Manchester, Iowa, farmer and President of the local Co-op, Douglas Bishop, began meeting with representatives of the United States Department of Agriculture to explore the feasibility of building an ethanol plant in the Manchester area. The idea was to assist farmers in the area in getting more value for their crops. An ethanol plant produces ethanol and feed grain which can be sold at a profit exceeding that associated with the mere sale of grain.
A series of 40 local meetings culminated in a membership drive. The Plaintiff, Northeast Iowa Ethanol, L.L.C., was later formed in order to sell 2500 shares of stock in the L.L.C. to raise funds for the financing of the plant. The construction of the plant was expected to cost $21 Million. It would have a capacity for producing 15 million gallons of ethanol per year. Through the meetings, Mr. Bishop and others raised $2,365,000. The average investor purchased two shares.
The membership drive ended in September 2001. The original plan was to begin construction in the fall of 2001 and have the plant operating by the fall of 2002. However, the issue of financing for the plant was more problematic than plaintiff had anticipated. Traditional lenders (banks) demanded that the plaintiff raise forty percent of the construction costs. It was clear that the plaintiff could not raise $8 Million. Plaintiff's proposed marketing partner, Williams Ethanol Services, agreed to invest $1 Million in the project. The contractor anticipated to build the facility, North Central Construction from North Dakota,.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
1. reference notes/455647_1_EE460-Project-131.pdf
King Fahd University of Petroleum and Minerals
Department of Electrical Engineering
EE Power Electronics Project
Design of a DC Chopper
I. Design of an AC/DC converter with the following the
specifications:
II. Design of step-down DC chopper with the following
specifications:
available is an ac with 230 V
2. (rms).
V.
-to-
-to-
III. Calculation for both circuits:
(a) Determine the values of Le and Ce for the output LC-filter.
(b) Determine the (peak and rms) voltage ratings and the
(average, rms, and the peak) current for
all components and devices.
(c) Verify your design calculation by using Pspice simulation.
Design AC/DC
Circuit
Design DC-DC
Chopper Circuit
Output Load
The project will be due on Sunday December 22, 2013.
3. reference notes/455647_2_DC-20Converters-Design (1).pdf
....-ju"ncv
O.
214 Chapter 5 Dc-Dc Converters
Example 5.10
A buck converter is shown in Figure 5.29. The input voltage is
V, == 110 V, the average load
age is Va == 60 V, and the average load current is la == 20 A.
The chopping u
1 == 20 kHz. The peak-to-peak ripples are 2.5% for load
voltage, 5% for load current, and
for filter Le current. (a) Determine the values of L" L, and Ceo
Use PSpice (b) to verify the
suits by plotting the instantaneous capacitor voltage vc, and
instantaneous load current iL ;
(c) to calculate the Fourier coefficients and the input current is.
The SPICE model pax'ameters
the transistor are IS == 6.734f, BF = 416.4, BR == 0.7371, CJC
== 3.638P, CJE::
TR == 239.5N, TF = 30L2P, and that ofthe diode are IS :: 2.2E-
15, BV = 1800V, IT ==
4. Solution
V, = 110 V, va = 60 V, I. == 20 A.
ay: == 0.025 x Va = 0.025 x 60 = 1.5 V
Va 60
R==-=-=311
10 20
From Eq. (5.48),
Va 60
k = - = - = 05455
V, 110 .
From Eq. (5.49),
Is = kla = 0.5455 x 20 == 10.91 A
alL = 0.05 x I. :: 0.05 x 20 == 1 A
5. M = 0.1 x 10 == 0.1 x 20 == 2 A
8. From Eq. (5.51), we get the value of L.:
VaWs - Va) 60 X (110 - 60)
Le = MIV, = 2 x 20 kHz x 110 = 681.82 ~H
From Eq. (5.53) we get the value of Ce:
2c == ,11
e ,lV, X 81 1.5 x 8 X 20 kHz == 8.33 ~F
L4
+
+
Vs 110 V
FIGURE 5.29
o~-----------+----------~--------~Buck converter.
5.12 Chopper Circuit Design 215
7. Ah Ah
L- = L-- = AVe
t} kT
which gives the approximate value of L:
kTAVc kAVe
L=~= AIJ
(5.128)
0.5454 X 1.5 = 40.91 H
1 X 20kHz f.L
b. k = 0.5455, / = 20 kHz, T = 11/ = 50 f.LS, and ton = k X T =
27.28 f.LS. The buck
chopper for PSpice simulation is shown in Figure 5.30a. The
control voltage Vg is
shown in Figure 5.30b. The list of the circuit file is as follows:
Example 5.10 Buck Converter
vs 1 0 IX: 110V
8. VY 1 2 IX: OV ; Voltage source to measure input current
Vg 7 3 PULSE (OV 20V 0 O.1NS 0.1NS 27.28US 50US)
RB 7 6 250 ; Transistor base resistance
LE 3 4 681. 8200
216 Chapter 5 Dc-Dc Converters
CE
L
R
VX
J:M
4
4
11. The PSpice plots are shown in Figure 5.31, where I(VX) = load
I (Le) = inductor L, current, and V (4) = capacitor voltage.
Using the PSpice
in Figure 5.31 gives v" = Vc = 59.462 V, <1v,. = 1.782 V, M =
2.029 A, I(av)
19.813 A, <1h = 0.3278 A, and fa = 19.8249 A. This verifies the
design; however,
gives a better result than expected.
Example 5.10 A Buck Converter
Temperature: 27.0
80.0V +_------_+------+_------_+_------+_----_+
6O.0V i-------------------"'-----------+
40.0 V +_----_+-----+_-------_+_--------+_------_+
o V (4)
20.0 A +_----_+------+_----_+_------+_----_+
19.6 A +_----_+-----+_----_+_-----+_----_+
01 (VX)
12. ~.OA+_----_+-----+_----_+_-----+_----_+
20.0 A 1------------------------------1-
O.OA +_----_+-------+_--------+---------+_----_+
1.50 ms 1.52 ms 1.54 ms 1.56 ms 1.58 ms 1.60 ms
o I (te)
TIme
FIGURE 5.31
PSpice plots for Example 5.10.
http:TF=301.2P
http:TR=239.5N
5.13 State-Space Analysis of Regulators 217
c. The Fourier coefficients of the input current are
FOURIER COMPONENTS OF TRANSIENT RESPONSE I (VY)
DC COMPONENT = 1.079535E+Ol
14. Key Points of Section 5.12
• The design of a dc-dc converter circuit requires (1)
determining the converter
topology, (2) finding the voltage and currents of the switching
devices, (3) finding
the values and ratings of passive elements such as capacitors
and inductors, and
(4) choosing the control strategy and the gating algorithm to
obtain the desired
output.
5.13 STATE-SPACE ANALYSIS OF REGULATORS
Any nth order linear or nonlinear differential equation in one
time-dependent variable
can be written [26] as n first-order differential equation in n
time-dependent variables
Xl through X n• Let us consider, for example, the following
third-order equation:
(5.129)
where y' is the first derivative of y, y' = (dldt) y. Let y be Xl'
Then Eq. (5.129) can be
15. represented by the three equations
Xl' = X2 (5.130)
X2" = X3 (5.131)
X3" = -aOxl - alxZ - a3x 3 (5.132)
In each case, n initial conditions must be known before an exact
solution can be found.
For any nth-order system, a set of n-independent variables is
necessary and sufficient
to describe that system completely. These variables Xl> X2, ... ,
Xn• are called the state
variables for the system. If the initial conditions of a linear
system are known at time to,
then we can find the states of the systems for all time t > to and
for a given set of input
sources.
reference notes/455647_3_dc-dc-20step-20down-
20converter.pdf
16. DC-DC Step-Down Converter
Dr. Mahmoud Kassas
Electrical Engineering Dept.
King Fahd University of Petroleum & Minerals
Dhahran, Saudi Arabia
17. reference notes/455647_4_Filter-20Design-20Diode.pdf
1
3.10 Rectifier Circuit Design:
Objectives:
• Learn about Design Specifications
• Become familiar with C-Filter Design
• Learn about LC-Filter Design
2
The design of a rectifier involves determining
the rating of semiconductor diodes. Rating
specification in terms of:
18. • Average current
• RMS current
• Peak current
• PIV "peak inverse voltage"
Design Specifications
3
• The output of the rectifiers contains
harmonics.
• Filters can be used to smooth out the dc
output voltage.
R
Le
+
-
21. +
-
LC-Filter
Ci Rectifier
4
Full-bridge Rectifier 120 V (rms), 60 Hz R = 500 Ω
• Design C-filter so that RF = 5% (Ripple-
factor).
• With the value of C calculate Vdc.
5
Charging of capacitor When the instantaneous voltage vs is
higher than the capacitor voltage vc, diodes D1 and D2 or D3
22. and D4 conduct supply voltage thereby charging the
capacitor.
Discharging of capacitor When the instantaneous supply
voltage vs falls below the instantaneous capacitor voltage vc
diodes D1 and D2 or D3 and D4 are reverse biased and the
capacitor discharges through the load resistor.
The capacitor voltage varies between Vcmin and Vcmax and
this is known as the output ripple voltage.
The output voltage waveforms and equivalent circuit on
charging and discharging are shown below.
6
Equivalent Circuit:
0)0(
1
=+=′+∫ LcL
e
47. 12
LC-Filter (output)
• Load resistance R = 40 Ω & Load inductance
L = 10 mH
f = 60 Hz RF = 10%
Equivalent circuit for harmonic is:
13
To make it easier for the nth harmonic
ripple current to pass through the filter
capacitor, the load impedance must be
much greater than that of the capacitor
impedance.
This condition is generally satisfied by:
10 times
51. ∞
= onnac
VV
Under this condition the effect of the load is negligible
(Voltage divider)
The total amount of ripple voltage due to all harmonics is:
15
π23
4
2
mVV =
56. For n = 2,
3.10 Rectifier Circuit Design: Slide Number 2Slide Number
3Full-bridge Rectifier 120 V (rms), 60 Hz R = 500 Ω Slide
Number 5Equivalent Circuit: Slide Number 7Slide Number
8Slide Number 9Slide Number 10Slide Number 11LC-Filter
(output)To make it easier for the nth harmonic ripple current to
pass through the filter capacitor, the load impedance must be
much greater than that of the capacitor impedance.���This
condition is generally satisfied by:�
10 times Slide Number 14Slide Number 15