1) The document covers circuit theory topics including circuit topology, voltage, current and power, Kirchoff's laws, active and passive circuit components, and DC and AC circuits.
2) It defines basic circuit concepts such as voltage, current, impedance, and uses Kirchoff's laws and Laplace transforms to analyze circuits.
3) Examples are provided to illustrate circuit analysis techniques for DC circuits using Ohm's law and AC circuits using impedance.
Lecture Outline
Introduction to subject
Application Areas
Power Electronic Devices
Power Converters
What is power electronics?
1) Definition
Power Electronics: is the electronics applied to conversion and control of electric power.
Prerequisites
Power electronics incorporates concepts from the fields of
Analog circuits
Electronic devices
Control systems
Power systems
Magnetics
Electric machines
Numerical simulation
Scope
It is not possible to build practical computers, cell phones, personal data devices, cars, airplanes, industrial processes, and other everyday products without power electronics.
Alternative energy systems such as wind generators, solar power, fuel cells, and others require power electronics to function.
Technology advances such as electric and hybrid vehicles, laptop computers, microwave ovens, flat-panel displays, LED lighting, and hundreds of other innovations were not possible until advances in power electronics enabled their implementation.
Although no one can predict the future, it is certain that power electronics will be at the heart of fundamental energy innovations.
Applications: Electric VehicleTesla Model S
Functions of the power electronics:
1. Convert the DC battery voltage to the variable AC required to drive the AC motor
240 V battery
Variable-frequency, variable-voltage AC drives the motor
AC motor propels the rear axle
Up to 330 kW (acceleration)
Up to 60 kW regenerative braking
2. Control charging of the battery
Interface to 240 V 60 Hz 1φ 100 A circuit in garage.
Control AC current waveform to be sinusoidal, unity power factor.
Control charging of battery to maximize life.
Applications: Hybrid VehiclesPrius
Power Electronics Module:
Convert the DC battery voltage to the variable AC required to drive the AC motor.
Includes dc-dc boost converter and dc-3φ ac inverter
Control system can operate in all-electric mode or in hybrid gas+electric mode
Partial-power electronics
This course is electronics based course dealing with measurements and instrumentation designed for students in Physics Electronics, Electrical and Electronics Engineering and allied disciplines. It is a theory course based on the use of electrical and electronics instruments for measurements. The course deals with topics such as Principle of measurements, Errors, Accuracy, Units of measurements and electrical standards, , introduction to the design of electronic equipment’s for temperature, pressure, level, flow measurement, speed etc
Lecture Outline
Introduction to subject
Application Areas
Power Electronic Devices
Power Converters
What is power electronics?
1) Definition
Power Electronics: is the electronics applied to conversion and control of electric power.
Prerequisites
Power electronics incorporates concepts from the fields of
Analog circuits
Electronic devices
Control systems
Power systems
Magnetics
Electric machines
Numerical simulation
Scope
It is not possible to build practical computers, cell phones, personal data devices, cars, airplanes, industrial processes, and other everyday products without power electronics.
Alternative energy systems such as wind generators, solar power, fuel cells, and others require power electronics to function.
Technology advances such as electric and hybrid vehicles, laptop computers, microwave ovens, flat-panel displays, LED lighting, and hundreds of other innovations were not possible until advances in power electronics enabled their implementation.
Although no one can predict the future, it is certain that power electronics will be at the heart of fundamental energy innovations.
Applications: Electric VehicleTesla Model S
Functions of the power electronics:
1. Convert the DC battery voltage to the variable AC required to drive the AC motor
240 V battery
Variable-frequency, variable-voltage AC drives the motor
AC motor propels the rear axle
Up to 330 kW (acceleration)
Up to 60 kW regenerative braking
2. Control charging of the battery
Interface to 240 V 60 Hz 1φ 100 A circuit in garage.
Control AC current waveform to be sinusoidal, unity power factor.
Control charging of battery to maximize life.
Applications: Hybrid VehiclesPrius
Power Electronics Module:
Convert the DC battery voltage to the variable AC required to drive the AC motor.
Includes dc-dc boost converter and dc-3φ ac inverter
Control system can operate in all-electric mode or in hybrid gas+electric mode
Partial-power electronics
This course is electronics based course dealing with measurements and instrumentation designed for students in Physics Electronics, Electrical and Electronics Engineering and allied disciplines. It is a theory course based on the use of electrical and electronics instruments for measurements. The course deals with topics such as Principle of measurements, Errors, Accuracy, Units of measurements and electrical standards, , introduction to the design of electronic equipment’s for temperature, pressure, level, flow measurement, speed etc
Symmetrical Components
Symmetrical Component Analysis
Synthesis of Unsymmetrical Phases from Their Symmetrical Components
The Symmetrical Components of Unsymmetrical Phasors
Phase Shift of Symmetrical Components in or Transformer Banks
Power in Terms of Symmetrical Components
Two port network parameters, Z, Y, ABCD, h and g parameters, Characteristic impedance,
Image transfer constant, image and iterative impedance, network function, driving point and
transfer functions – using transformed (S) variables, Poles and Zeros.
This chapter provides complete solution of different circuits using Laplace transform method and also provides information about applications of Laplace transforms.
Presentation on Op-amp by Sourabh kumarSourabh Kumar
Visit Andro Root ( http:\\www.androroot.com ) for Tech. news and Smartphones.
Presentation on Op-amp(Operational Amplifier) by Sourabh kumar. B.tech Presentation,
Do Diodes and electronic stuff freaks you out?And what about those clippers and clampers?The details are as follows.
You can learn every concept related to it here.Enjoy clipping :)
Symmetrical Components
Symmetrical Component Analysis
Synthesis of Unsymmetrical Phases from Their Symmetrical Components
The Symmetrical Components of Unsymmetrical Phasors
Phase Shift of Symmetrical Components in or Transformer Banks
Power in Terms of Symmetrical Components
Two port network parameters, Z, Y, ABCD, h and g parameters, Characteristic impedance,
Image transfer constant, image and iterative impedance, network function, driving point and
transfer functions – using transformed (S) variables, Poles and Zeros.
This chapter provides complete solution of different circuits using Laplace transform method and also provides information about applications of Laplace transforms.
Presentation on Op-amp by Sourabh kumarSourabh Kumar
Visit Andro Root ( http:\\www.androroot.com ) for Tech. news and Smartphones.
Presentation on Op-amp(Operational Amplifier) by Sourabh kumar. B.tech Presentation,
Do Diodes and electronic stuff freaks you out?And what about those clippers and clampers?The details are as follows.
You can learn every concept related to it here.Enjoy clipping :)
This is an introductory lecture on electrical services in buildings. This module deals with basic terminologies and formulae covered in school level physics. This is a brief recapitulation.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
HEAP SORT ILLUSTRATED WITH HEAPIFY, BUILD HEAP FOR DYNAMIC ARRAYS.
Heap sort is a comparison-based sorting technique based on Binary Heap data structure. It is similar to the selection sort where we first find the minimum element and place the minimum element at the beginning. Repeat the same process for the remaining elements.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
1. Circuit Theory
• What you will use this for
– Power management
– Signals between subsystems
– Possible analog data types
• How the knowledge will help you
– Understanding power and energy requirements
– Behavior of digital electric signals
– Analog signal conditioning and limitations
– Understanding associated technologies
2. Circuit theory Topics
• Circuit Topology
• Voltage, Current and Power
• Kirchoff’s Laws
• Circuit components
• DC circuits
• AC circuits
We will consistently use Systeme International d’Unites, or SI units here.
Basic units are Meters[m], Kilograms[kg], Seconds[s], and Amperes[A].
3. Circuit Topology
• A circuit consists of a mesh of loops
• Represented as branches and nodes in an
undirected graph.
• Circuit components reside in the branches
• Connectivity resides in the nodes
– Nodes represent wires
– Wires represent equipotentials
4. Voltage, Current and Power (1)
• The concept of charge
– The Coulomb [C] – the SI unit of charge
– An electron carries -1.6e-19 [C]
– Conservation of charge
• The concept of potential
– Attraction/repulsion of charges
– The electric field
– The energy of moving a charge in a field
5. Voltage, Current and Power (2)
• Voltage is a difference in electric potential
– always taken between two points.
– Absolute voltage is a nonsensical fiction.
– The concept of ground is also a (useful) fiction.
• It is a line integral of the force exerted by
an electric field on a unit charge.
• Customarily represented by v or V.
• The SI unit is the Volt [V].
6. Voltage, Current and Power (3)
• Current is a movement of charge.
• It is the time derivative of charge passing
through a circuit branch.
• Customarily represented by i or I.
• The SI unit is the Ampere [A].
7. Voltage, Current and Power (4)
• Power is the product of voltage by current.
• It is the time derivative of energy delivered
to or extracted from a circuit branch.
• Customarily represented by P or W.
• The SI unit is the Watt [W].
8. Kirchoff’s Laws
• These laws add up to nothing! Yet they
completely characterize circuit behavior.
• Kirchoff’s Voltage Law (KVL) - The sum
of voltages taken around any loop is zero.
– The start and end points are identical; consequently there is no
potential difference between them.
• Kirchoff’s Current Law (KCL) – The sum
of currents entering any node is zero.
– A consequence of the law of conservation of charge.
9. Circuit components
• Active vs. Passive components
– Active ones may generate electrical power.
– Passive ones may store but not generate power.
• Lumped vs. Distributed Constants
– Distributed constant components account for
propagation times through the circuit branches.
– Lumped constant components ignore these propagation
times. Appropriate for circuits small relative to signal
wavelengths.
• Linear, time invariant (LTI) components are those
with constant component values.
10. Active circuit components
• Conservation of energy: active components must
get their power from somewhere!
• From non-electrical sources
– Batteries (chemical)
– Dynamos (mechanical)
– Transducers in general (light, sound, etc.)
• From other electrical sources
– Power supplies
– Power transformers
– Amplifiers
11. Passive lumped constants
• Classical LTI
– Resistors are AC/DC components.
– Inductors are AC components (DC short circuit).
– Capacitors are AC components (DC open circuit).
• Other components
– Rectifier diodes.
– Three or more terminal devices, e.g. transistors.
– Transformers.
12. DC circuits
• The basic LTI component is the Resistor
– Customarily represented by R.
– The SI unit is the Ohm [].
• Ohm’s Law: V = I R
Ohm’s and Kirchoff’s laws completely
prescribe the behavior of any DC circuit
comprising LTI components.
13. Example: voltage divider
Assume no current is drawn at the output
terminals in measuring Vout. Ohm’s Law
requires that VR1 = IR1 R1 and VR2 = IR2 R2,
which is also Vout. KCL says the current
leaving resistor R1 must equal the current
entering R2, or IR1 = IR2, so we can write
Vout = IR1 R2. KVL says the voltage around the loop including the battery
and both resistors is 0, therefore Vin = VR1 + Vout, or Vin = IR1 R1 + IR1 R2.
Thus, IR1 = Vin/ (R1 + R2), and
Vout = VinR2 / (R1 + R2).
R1
R2Vin Vout
15. AC Components: Inductors
• Current in an inductor generates a magnetic field,
B = K1 I
• Changes in the field induce an inductive voltage.
V = K2 (dB/dt)
• The instantaneous voltage is
V = L(dI/dt),
where L = K1K2.
This is the time domain behavior of an inductor.
16. AC Components: Capacitors
• Charge in a capacitor produces an electric field E,
and thus a proportional voltage,
Q = C V,
Where C is the capacitance.
• The charge on the capacitor changes according to
I = (dQ/dt).
• The instantaneous current is therefore
I = C(dV/dt).
This is the time domain behavior of a capacitor.
17. AC Circuits – Laplace Transform
• Transforms differential equations in time to
algebraic equations in frequency (s
domain).
where the frequency variable s = + j.
For sinusoidal waves, = 0, and s = j.
•Resistor behavior in s domain: v= iR.
•Inductor behavior in s domain: v= i (jL).
•Capacitor behavior in s domain: i= v (jC).
,
)(
),(),()( ∫ →→→
s
sf
Fdtsfs
dt
dF
sftF
18. AC circuits -- Impedance
• Impedance and Ohm’s Law for AC:
– Impedance is Z = R + jX,
where j = -1, and X is the reactance in [].
– Ohm’s AC Law in s domain: v = i Z
• Resistance R dissipates power as heat.
• Reactance X stores and returns power.
– Inductors have positive reactance Xl=L
– Capacitors have negative reactance Xc=-1/C
19. Impedance shortcuts
• The impedance of components connected in
parallel is the reciprocal of the complex
sum of their reciprocal impedances.
Z1
Z2
Zn
Zs
Z1 Z2 ZnZp
• The impedance of components connected in series
is the complex sum of their impedances.
ns ZZZZ ++= 21
np ZZZZ
1111
21
++=
20. Example: low pass filter
R
Vin Vout
C
.
1
1
gainfiltertheDefine
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.example,DCthefromngGeneralizi
RCjCjR
Cj
V
V
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ZRZ
ZZ
Z
VV
in
out
CR
CR
C
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ωω
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ω
+
=
−
−
==
−
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Magnitude and phase plots
of A, where RC=1. The
magnitude plot is log/log,
while the phase plot is
linear radians vs. log freq.
21. Homework problem
R
Vin
Vout
C
L
Derive the filter gain of the pictured circuit.
Plot the magnitude and phase of the filter for
L = 6.3e-6 [H], R = 16 [], and C = 1.0e-7 [F].
For extra credit, also plot for R = 7 [] and 50 [].