ee305-pe-m3-l2-over.pptx
•Download as PPTX, PDF•
0 likes•7 views
The document discusses various 3-phase controlled rectifier and converter circuits with resistive and inductive loads. It describes the operation of half-wave and fully controlled bridge converters, explaining how the firing angle (α) affects the output voltage waveform. For fully controlled bridges, it shows the voltage waveform for α values of 0°, 30°, 60°, 90°, 120°, and 150° in converter and inverter modes. It also discusses when the load current becomes discontinuous and the appropriate firing angles for starting and controlling the speed of a DC motor load.
Report
Share
Report
Share
Recommended
Power Electronics - Phase Controlled Converters.pptx
A detailed analysis of the Controlled Converters with SCR. it contains a single-phase Fully controlled- Half Wave and Full Wave Rectifier with R, RL and RLC loads., Three Phase Fully controlled- Half Wave and Full Wave Rectifier with R, RL and RLC loads. Dual Converters. It also explains the effect of source inductance on the performance of converters
Mini project submission
This document describes a circuit to control the speed of a DC motor using phase angle control of a full wave fully controlled rectifier. It includes:
1) An introduction explaining single phase fully controlled rectifiers and how they can control output voltage/current by controlling thyristor turn on instants.
2) Details of the circuit which uses operational amplifiers and transistors to generate square wave pulses to trigger thyristors at a controlled firing angle, allowing adjustment of the average output voltage and current.
3) Explanations of the working, components, circuit diagram, output waveforms, and a PCB design for the thyristor triggering circuit.
AC-DC Converter_a.pdf
The document discusses different types of phase controlled rectifiers. There are two types - single-phase and three-phase controlled rectifiers. Single-phase rectifiers can be half-wave or full-wave, while three-phase rectifiers can be semi, full, or dual converters. The operation of a single-phase half-wave thyristor converter with a resistive load is explained, including derivations of average output voltage, RMS output voltage, and load current. Effects of an inductive load are also discussed.
Cyclo converters
Cycloconverters are static frequency changers that can produce adjustable voltage and frequency AC power from a constant voltage AC source without an intermediate DC link. They use naturally commutated thyristors in configurations such as single phase to single phase, single phase to three phase, and three phase to three phase. Cycloconverters see applications in drives for machines like cement mills, ship propulsion, rolling mills, and ore grinding mills. They have advantages like not requiring an intermediate DC stage and suitability for large, low speed drives. However, they require a large number of thyristors and are limited to an output frequency of one-third the input frequency.
Ch1 AC voltage controllers_Part 3 (1).pdf
This document discusses single-phase full-wave AC voltage controllers with an RL load. It describes how the thyristors T1 and T2 are forward biased during alternating half cycles and conduct when gated. It also discusses problems that can occur if T2 is fired while T1 is still conducting, and solutions to overcome this using continuous or pulsed gating signals. Equations are provided to analyze the load current, extinction angle, conduction angle, output voltage, current, power, and harmonics for this type of controller.
Bridge rectifier
This document describes a study of single full wave controlled rectifiers using thyristors with a resistive load. It discusses the experimental setup using various equipment to observe the output voltage waveforms. The key findings are:
1) The output voltage varies with the firing angle α, providing control of the DC voltage between 0° and 180°.
2) A full wave rectifier using two thyristors provides greater output than a half wave rectifier using a single thyristor.
3) Waveforms were observed on an oscilloscope to analyze the relationship between output voltage, current, and firing angle.
Cycloconverters
Introduction
Working Principle
Step Down and Step Up Cycloconverter
Single phase to single phase cycloconverter
Mid-Point and Bridge type cycloconverter
Advantages and disadvantages
Applications
Recommended
Power Electronics - Phase Controlled Converters.pptx
A detailed analysis of the Controlled Converters with SCR. it contains a single-phase Fully controlled- Half Wave and Full Wave Rectifier with R, RL and RLC loads., Three Phase Fully controlled- Half Wave and Full Wave Rectifier with R, RL and RLC loads. Dual Converters. It also explains the effect of source inductance on the performance of converters
Mini project submission
This document describes a circuit to control the speed of a DC motor using phase angle control of a full wave fully controlled rectifier. It includes:
1) An introduction explaining single phase fully controlled rectifiers and how they can control output voltage/current by controlling thyristor turn on instants.
2) Details of the circuit which uses operational amplifiers and transistors to generate square wave pulses to trigger thyristors at a controlled firing angle, allowing adjustment of the average output voltage and current.
3) Explanations of the working, components, circuit diagram, output waveforms, and a PCB design for the thyristor triggering circuit.
AC-DC Converter_a.pdf
The document discusses different types of phase controlled rectifiers. There are two types - single-phase and three-phase controlled rectifiers. Single-phase rectifiers can be half-wave or full-wave, while three-phase rectifiers can be semi, full, or dual converters. The operation of a single-phase half-wave thyristor converter with a resistive load is explained, including derivations of average output voltage, RMS output voltage, and load current. Effects of an inductive load are also discussed.
Cyclo converters
Cycloconverters are static frequency changers that can produce adjustable voltage and frequency AC power from a constant voltage AC source without an intermediate DC link. They use naturally commutated thyristors in configurations such as single phase to single phase, single phase to three phase, and three phase to three phase. Cycloconverters see applications in drives for machines like cement mills, ship propulsion, rolling mills, and ore grinding mills. They have advantages like not requiring an intermediate DC stage and suitability for large, low speed drives. However, they require a large number of thyristors and are limited to an output frequency of one-third the input frequency.
Ch1 AC voltage controllers_Part 3 (1).pdf
This document discusses single-phase full-wave AC voltage controllers with an RL load. It describes how the thyristors T1 and T2 are forward biased during alternating half cycles and conduct when gated. It also discusses problems that can occur if T2 is fired while T1 is still conducting, and solutions to overcome this using continuous or pulsed gating signals. Equations are provided to analyze the load current, extinction angle, conduction angle, output voltage, current, power, and harmonics for this type of controller.
Bridge rectifier
This document describes a study of single full wave controlled rectifiers using thyristors with a resistive load. It discusses the experimental setup using various equipment to observe the output voltage waveforms. The key findings are:
1) The output voltage varies with the firing angle α, providing control of the DC voltage between 0° and 180°.
2) A full wave rectifier using two thyristors provides greater output than a half wave rectifier using a single thyristor.
3) Waveforms were observed on an oscilloscope to analyze the relationship between output voltage, current, and firing angle.
Cycloconverters
Introduction
Working Principle
Step Down and Step Up Cycloconverter
Single phase to single phase cycloconverter
Mid-Point and Bridge type cycloconverter
Advantages and disadvantages
Applications
Single phase ac voltage controller
This document summarizes the operation of a single phase AC voltage controller with an RL load. It describes how the voltage is controlled using pairs of thyristors (SCRs) through phase control. During operation, the first thyristor T1 is triggered at firing angle α and conducts until 180°. The second thyristor T2 is then triggered at 180°+α and conducts until 360°+α, producing an output voltage that is variable but at the same frequency as the input supply. The document also provides an example calculation for controlling 230V, 50Hz power into a 3Ω resistor and 4Ω inductor load, determining the firing angle range, maximum load and power, power factor,
RGPV EX7102 UNITIII
This document provides information about EHV AC and DC transmission, specifically components of EHV DC systems and converter circuits. It discusses:
1) The main components of EHV DC systems include converter transformers, thyristor valves, bus bars, and series reactors. Converters use thyristor valves connected in a three-phase full-wave bridge circuit to convert AC to DC and vice versa.
2) Converters require reactive power, which is supplied by AC filters, shunt capacitors or synchronous condensers. Operation of converters generates harmonic voltages and currents that can cause equipment heating, interference, and other issues if not mitigated.
3) Harmonics are mitigated using AC and DC
AC-AC voltage covertors (Cycloconvertors)
1. The document discusses various methods of AC to AC power processing including on-off control, phase-angle control, and cycloconverters.
2. On-off control uses thyristors as switches to connect the load for a number of input cycles then disconnect it for a number of cycles to vary the output. Phase-angle control fires thyristors at a variable point in the AC cycle to control output.
3. Cycloconverters directly convert AC source frequency to meet load frequency requirements without converting to DC intermediate. They are used for applications requiring different frequencies than the source like 400Hz aircraft ground power.
Unit-5 AC-AC Cycloconverter
This document discusses different types of AC voltage controllers. It begins by introducing AC voltage controllers and how they can control power flow into a load by varying the RMS value of the load voltage using thyristors. It then describes the main types of AC voltage controllers classified by input supply type and control method. Applications such as lighting, heating and motor speed control are also outlined. The document proceeds to explain the principles and techniques of on-off control and phase control. Circuit diagrams are provided to illustrate single phase and three phase controller configurations. The document concludes by briefly discussing cycloconverters which can provide a variable output voltage and frequency.
Inverters (DC-AC)
1. An inverter refers to a power electronic device that converts DC input voltages to AC output voltages at the required magnitude and frequency.
2. There are three basic types of dc-ac converters depending on their AC output waveform: square wave, modified sine wave, and pure sine wave.
3. Inverters have applications in adjustable speed AC drives, electric vehicles, induction heating, aircraft power supplies, photovoltaic systems, UPS, and air conditioning units.
Multilevel Inverters [Autosaved].pptx
This document discusses multilevel inverters and cascaded H-bridge multilevel inverters. It provides objectives of multilevel inverters such as higher power quality, lower harmonics, and lower voltage stress. It then describes the operation of cascaded H-bridge inverters using various modulation techniques including carrier-based PWM with phase-shifted and level-shifted carriers. It also discusses diode-clamped multilevel inverters and their operation along with space vector modulation.
AC to ac Converters.pptx
There are numerous systems in use today that convert the fixed
voltage and fixed frequency a.c. supply into variable voltage or /and variable frequency supply using power semiconductor devices. The simplest forms of ac-to-ac converters are the a.c. voltage controllers that
convert fixed voltage fixed frequency into variable voltage fixed frequency. These voltage controllers are also called a.c. choppers or a.c. voltage regulators. Some of the applications are motor drive systems; electric furnaces heat control, light dimmers, HVAC systems, welding and other industrial applications. This chapter discusses the single phase and three-phase a.c. voltage controller (a.c. choppers) and their performance with resistive and resistive-inductive loads.
The ac-to-ac power converters available in industry today do not actually convert power directly from a.c. power of one frequency to a.c. power of another frequency. Instead, these converters first convert
electrical power to d.c. using a rectifier, and then convert power back into a.c. using an inverter.These are called two-stage converters. However,
a cycloconverter is a frequency changer that converts an a.c. supply of fixed input frequency directly to an a.c. output of another frequency.
Cycloconverters not only eliminate the problem of having multiple systems to perform a single function, they also limit the flow of power to a single switch at any one period in time. Therefore, there is no bus link,
d.c. or otherwise, included in a cycloconverter topology between power input and power output.
1 ph topic 8 resistors and inductors in series
This document discusses a series RL circuit where a resistor and inductor are connected in series. It explains that the current through both components is the same, while the resistor voltage is in phase with the current and the inductor voltage leads the current by 90 degrees. It describes how to calculate circuit values like impedance, power factor, and voltages using phasor diagrams where the current is used as a reference. Changing conditions like frequency, resistance, or inductance will affect values like current, voltages, power, and power factor. Review questions are provided to test understanding.
unit4.pdf
1) Inverters are DC to AC converters that can generate single or three-phase AC outputs from a single DC source using techniques like pulse-width modulation. 2) A basic inverter leg contains two switches and freewheeling diodes that allow bi-directional current flow and uni-directional voltage control. 3) Multiple inverter legs can be combined into configurations like the single-phase H-bridge or three-phase inverter to generate the desired output waveforms.
Thyristor_Converters.ppt
Thyristor converters provide controlled conversion of AC power to DC power and allow the DC voltage to be continuously varied. They operate in either rectification mode where power flows from AC to DC, or inverter mode where power flows from DC to AC. In three-phase thyristor converters, the average DC output voltage is related to the firing angle and can be made positive or negative to control the direction of power flow. Thyristor converters are widely used for high power applications but inject harmonics into electrical systems.
Inverter PPT.ppt
1. DC-AC converters called inverters change a DC input voltage into a symmetrical AC output voltage of desired magnitude and frequency.
2. Inverters can be single phase or three phase, and are widely used in applications like variable speed motor drives, induction heating, and HVDC power transmission.
3. The main types of inverters are single phase half bridge, single phase full bridge, and three phase inverters, which produce different output voltage waveforms and can be powered by batteries or other DC sources.
Power electronics Phase Controlled Rectifiers - SCR
This chapter introduces ideas on phase controlled SCR operated rectifiers. i.e. controlled rectifiers.
lecture_7_ujt_and_put.pptx
The document discusses unijunction transistors (UJTs) and programmable unijunction transistors (PUTs). It describes their equivalent circuit models, characteristics such as intrinsic standoff ratio and peak voltage, and applications in relaxation oscillators and timing circuits. Examples are provided to illustrate how to calculate values like standoff voltage from given specifications. PUTs offer the advantage over UJTs of having programmable parameters set by external resistors.
Inverter
The document discusses different types of inverters, including half bridge and full bridge single phase inverters, series inverters, parallel inverters, and pulse width modulation (PWM) control methods. Series inverters have commutating components connected in series with the load and operate at high frequencies. Parallel inverters use a commutating capacitor connected in parallel with the load. PWM control varies the pulse width to regulate the output voltage without additional components. Single pulse width modulation controls one device per half cycle, while multiple pulse width modulation uses multiple pulses per half cycle to reduce harmonics.
555 timer
The document describes various applications of the 555 timer integrated circuit including waveform generation, burglar alarms, and traffic light control. It provides details on the internal components of the 555 timer including two comparators and an R-S flip-flop. Circuit diagrams and explanations are given for using the 555 timer as both a monostable and astable multivibrator, with derivations of timing equations. Key voltage thresholds and the states of internal components are indicated in diagrams showing the charging and discharging operation of the timer circuits.
A presentation on inverter by manoj
This document provides information on inverters, including:
- Inverters convert DC input voltage into AC output voltage of desired magnitude and frequency. They are also known as DC-AC converters.
- Inverters can be classified as single-phase or three-phase, and by the type of switching device used (BJT, MOSFET, IGBT, GTO).
- Applications include variable speed AC motors, induction heating, UPS systems. Inputs can be batteries, fuel cells, solar cells.
- Circuit diagrams and operating principles are provided for single-phase half-bridge, full-bridge, and three-phase inverters using 1800 and 1200 conduction modes.
Unit-2 AC-DC converter
This document discusses various types of phase controlled converters including single-phase and three-phase semiconverters, full converters, and dual converters. It provides equations for the average and RMS output voltage of single-phase converters with resistive and RL loads. It also derives an expression for the average output voltage of a three-phase half wave converter with continuous and constant load current. Key aspects of three-phase half wave, full wave, and dual converters are summarized.
Bjt oscillators
The document discusses positive feedback amplifiers and oscillator circuits. It begins by defining oscillation and oscillators, and describes how oscillators are used to generate signals in communications, computing, and test equipment. It then classifies oscillators based on their waveforms, operating mechanisms, frequencies, and circuit types. The document explains the Barkhausen criteria that must be met for oscillations to start and be sustained. It provides examples of common oscillator circuits like Hartley, Colpitts, RC phase shift, Wien bridge, and crystal oscillators. It analyzes the operating principles, feedback networks, and conditions for oscillation of these oscillator types. The document emphasizes that crystal oscillators provide the most stable output frequencies.
Power Electronics- AC -AC Converters.pptx
This PPT is about AC-AC Converters, including AC Voltage controllers and Cycloconverters, their types, and control.
lecture_11_invertershhhhjjjjjjj*hbbbnnnnn
This document discusses inverters, which convert DC power to AC power by switching the DC input voltage in a predetermined sequence to generate an AC output voltage. There are three main types of inverters based on output waveform: square wave, modified sine wave, and pure sine wave. Square wave inverters are the simplest but have poor power quality, while pure sine wave inverters have the lowest harmonic distortion but are the most expensive. The document also examines the harmonic content of inverter outputs through Fourier analysis and defines total harmonic distortion to measure output waveform quality. Examples are provided to calculate THD for a single-phase full bridge inverter output.
smart pill dispenser is designed to improve medication adherence and safety f...
Smart Pill Dispenser that boosts medication adherence, empowers patients, enables remote monitoring, enhances safety, reduces healthcare costs, and contributes to data-driven healthcare improvements
More Related Content
Similar to ee305-pe-m3-l2-over.pptx
Single phase ac voltage controller
This document summarizes the operation of a single phase AC voltage controller with an RL load. It describes how the voltage is controlled using pairs of thyristors (SCRs) through phase control. During operation, the first thyristor T1 is triggered at firing angle α and conducts until 180°. The second thyristor T2 is then triggered at 180°+α and conducts until 360°+α, producing an output voltage that is variable but at the same frequency as the input supply. The document also provides an example calculation for controlling 230V, 50Hz power into a 3Ω resistor and 4Ω inductor load, determining the firing angle range, maximum load and power, power factor,
RGPV EX7102 UNITIII
This document provides information about EHV AC and DC transmission, specifically components of EHV DC systems and converter circuits. It discusses:
1) The main components of EHV DC systems include converter transformers, thyristor valves, bus bars, and series reactors. Converters use thyristor valves connected in a three-phase full-wave bridge circuit to convert AC to DC and vice versa.
2) Converters require reactive power, which is supplied by AC filters, shunt capacitors or synchronous condensers. Operation of converters generates harmonic voltages and currents that can cause equipment heating, interference, and other issues if not mitigated.
3) Harmonics are mitigated using AC and DC
AC-AC voltage covertors (Cycloconvertors)
1. The document discusses various methods of AC to AC power processing including on-off control, phase-angle control, and cycloconverters.
2. On-off control uses thyristors as switches to connect the load for a number of input cycles then disconnect it for a number of cycles to vary the output. Phase-angle control fires thyristors at a variable point in the AC cycle to control output.
3. Cycloconverters directly convert AC source frequency to meet load frequency requirements without converting to DC intermediate. They are used for applications requiring different frequencies than the source like 400Hz aircraft ground power.
Unit-5 AC-AC Cycloconverter
This document discusses different types of AC voltage controllers. It begins by introducing AC voltage controllers and how they can control power flow into a load by varying the RMS value of the load voltage using thyristors. It then describes the main types of AC voltage controllers classified by input supply type and control method. Applications such as lighting, heating and motor speed control are also outlined. The document proceeds to explain the principles and techniques of on-off control and phase control. Circuit diagrams are provided to illustrate single phase and three phase controller configurations. The document concludes by briefly discussing cycloconverters which can provide a variable output voltage and frequency.
Inverters (DC-AC)
1. An inverter refers to a power electronic device that converts DC input voltages to AC output voltages at the required magnitude and frequency.
2. There are three basic types of dc-ac converters depending on their AC output waveform: square wave, modified sine wave, and pure sine wave.
3. Inverters have applications in adjustable speed AC drives, electric vehicles, induction heating, aircraft power supplies, photovoltaic systems, UPS, and air conditioning units.
Multilevel Inverters [Autosaved].pptx
This document discusses multilevel inverters and cascaded H-bridge multilevel inverters. It provides objectives of multilevel inverters such as higher power quality, lower harmonics, and lower voltage stress. It then describes the operation of cascaded H-bridge inverters using various modulation techniques including carrier-based PWM with phase-shifted and level-shifted carriers. It also discusses diode-clamped multilevel inverters and their operation along with space vector modulation.
AC to ac Converters.pptx
There are numerous systems in use today that convert the fixed
voltage and fixed frequency a.c. supply into variable voltage or /and variable frequency supply using power semiconductor devices. The simplest forms of ac-to-ac converters are the a.c. voltage controllers that
convert fixed voltage fixed frequency into variable voltage fixed frequency. These voltage controllers are also called a.c. choppers or a.c. voltage regulators. Some of the applications are motor drive systems; electric furnaces heat control, light dimmers, HVAC systems, welding and other industrial applications. This chapter discusses the single phase and three-phase a.c. voltage controller (a.c. choppers) and their performance with resistive and resistive-inductive loads.
The ac-to-ac power converters available in industry today do not actually convert power directly from a.c. power of one frequency to a.c. power of another frequency. Instead, these converters first convert
electrical power to d.c. using a rectifier, and then convert power back into a.c. using an inverter.These are called two-stage converters. However,
a cycloconverter is a frequency changer that converts an a.c. supply of fixed input frequency directly to an a.c. output of another frequency.
Cycloconverters not only eliminate the problem of having multiple systems to perform a single function, they also limit the flow of power to a single switch at any one period in time. Therefore, there is no bus link,
d.c. or otherwise, included in a cycloconverter topology between power input and power output.
1 ph topic 8 resistors and inductors in series
This document discusses a series RL circuit where a resistor and inductor are connected in series. It explains that the current through both components is the same, while the resistor voltage is in phase with the current and the inductor voltage leads the current by 90 degrees. It describes how to calculate circuit values like impedance, power factor, and voltages using phasor diagrams where the current is used as a reference. Changing conditions like frequency, resistance, or inductance will affect values like current, voltages, power, and power factor. Review questions are provided to test understanding.
unit4.pdf
1) Inverters are DC to AC converters that can generate single or three-phase AC outputs from a single DC source using techniques like pulse-width modulation. 2) A basic inverter leg contains two switches and freewheeling diodes that allow bi-directional current flow and uni-directional voltage control. 3) Multiple inverter legs can be combined into configurations like the single-phase H-bridge or three-phase inverter to generate the desired output waveforms.
Thyristor_Converters.ppt
Thyristor converters provide controlled conversion of AC power to DC power and allow the DC voltage to be continuously varied. They operate in either rectification mode where power flows from AC to DC, or inverter mode where power flows from DC to AC. In three-phase thyristor converters, the average DC output voltage is related to the firing angle and can be made positive or negative to control the direction of power flow. Thyristor converters are widely used for high power applications but inject harmonics into electrical systems.
Inverter PPT.ppt
1. DC-AC converters called inverters change a DC input voltage into a symmetrical AC output voltage of desired magnitude and frequency.
2. Inverters can be single phase or three phase, and are widely used in applications like variable speed motor drives, induction heating, and HVDC power transmission.
3. The main types of inverters are single phase half bridge, single phase full bridge, and three phase inverters, which produce different output voltage waveforms and can be powered by batteries or other DC sources.
Power electronics Phase Controlled Rectifiers - SCR
This chapter introduces ideas on phase controlled SCR operated rectifiers. i.e. controlled rectifiers.
lecture_7_ujt_and_put.pptx
The document discusses unijunction transistors (UJTs) and programmable unijunction transistors (PUTs). It describes their equivalent circuit models, characteristics such as intrinsic standoff ratio and peak voltage, and applications in relaxation oscillators and timing circuits. Examples are provided to illustrate how to calculate values like standoff voltage from given specifications. PUTs offer the advantage over UJTs of having programmable parameters set by external resistors.
Inverter
The document discusses different types of inverters, including half bridge and full bridge single phase inverters, series inverters, parallel inverters, and pulse width modulation (PWM) control methods. Series inverters have commutating components connected in series with the load and operate at high frequencies. Parallel inverters use a commutating capacitor connected in parallel with the load. PWM control varies the pulse width to regulate the output voltage without additional components. Single pulse width modulation controls one device per half cycle, while multiple pulse width modulation uses multiple pulses per half cycle to reduce harmonics.
555 timer
The document describes various applications of the 555 timer integrated circuit including waveform generation, burglar alarms, and traffic light control. It provides details on the internal components of the 555 timer including two comparators and an R-S flip-flop. Circuit diagrams and explanations are given for using the 555 timer as both a monostable and astable multivibrator, with derivations of timing equations. Key voltage thresholds and the states of internal components are indicated in diagrams showing the charging and discharging operation of the timer circuits.
A presentation on inverter by manoj
This document provides information on inverters, including:
- Inverters convert DC input voltage into AC output voltage of desired magnitude and frequency. They are also known as DC-AC converters.
- Inverters can be classified as single-phase or three-phase, and by the type of switching device used (BJT, MOSFET, IGBT, GTO).
- Applications include variable speed AC motors, induction heating, UPS systems. Inputs can be batteries, fuel cells, solar cells.
- Circuit diagrams and operating principles are provided for single-phase half-bridge, full-bridge, and three-phase inverters using 1800 and 1200 conduction modes.
Unit-2 AC-DC converter
This document discusses various types of phase controlled converters including single-phase and three-phase semiconverters, full converters, and dual converters. It provides equations for the average and RMS output voltage of single-phase converters with resistive and RL loads. It also derives an expression for the average output voltage of a three-phase half wave converter with continuous and constant load current. Key aspects of three-phase half wave, full wave, and dual converters are summarized.
Bjt oscillators
The document discusses positive feedback amplifiers and oscillator circuits. It begins by defining oscillation and oscillators, and describes how oscillators are used to generate signals in communications, computing, and test equipment. It then classifies oscillators based on their waveforms, operating mechanisms, frequencies, and circuit types. The document explains the Barkhausen criteria that must be met for oscillations to start and be sustained. It provides examples of common oscillator circuits like Hartley, Colpitts, RC phase shift, Wien bridge, and crystal oscillators. It analyzes the operating principles, feedback networks, and conditions for oscillation of these oscillator types. The document emphasizes that crystal oscillators provide the most stable output frequencies.
Power Electronics- AC -AC Converters.pptx
This PPT is about AC-AC Converters, including AC Voltage controllers and Cycloconverters, their types, and control.
lecture_11_invertershhhhjjjjjjj*hbbbnnnnn
This document discusses inverters, which convert DC power to AC power by switching the DC input voltage in a predetermined sequence to generate an AC output voltage. There are three main types of inverters based on output waveform: square wave, modified sine wave, and pure sine wave. Square wave inverters are the simplest but have poor power quality, while pure sine wave inverters have the lowest harmonic distortion but are the most expensive. The document also examines the harmonic content of inverter outputs through Fourier analysis and defines total harmonic distortion to measure output waveform quality. Examples are provided to calculate THD for a single-phase full bridge inverter output.
Similar to ee305-pe-m3-l2-over.pptx (20)
Power electronics Phase Controlled Rectifiers - SCR
Power electronics Phase Controlled Rectifiers - SCR
Recently uploaded
smart pill dispenser is designed to improve medication adherence and safety f...
Smart Pill Dispenser that boosts medication adherence, empowers patients, enables remote monitoring, enhances safety, reduces healthcare costs, and contributes to data-driven healthcare improvements
Prediction of Electrical Energy Efficiency Using Information on Consumer's Ac...
Energy efficiency has been important since the latter part of the last century. The main object of this survey is to determine the energy efficiency knowledge among consumers. Two separate districts in Bangladesh are selected to conduct the survey on households and showrooms about the energy and seller also. The survey uses the data to find some regression equations from which it is easy to predict energy efficiency knowledge. The data is analyzed and calculated based on five important criteria. The initial target was to find some factors that help predict a person's energy efficiency knowledge. From the survey, it is found that the energy efficiency awareness among the people of our country is very low. Relationships between household energy use behaviors are estimated using a unique dataset of about 40 households and 20 showrooms in Bangladesh's Chapainawabganj and Bagerhat districts. Knowledge of energy consumption and energy efficiency technology options is found to be associated with household use of energy conservation practices. Household characteristics also influence household energy use behavior. Younger household cohorts are more likely to adopt energy-efficient technologies and energy conservation practices and place primary importance on energy saving for environmental reasons. Education also influences attitudes toward energy conservation in Bangladesh. Low-education households indicate they primarily save electricity for the environment while high-education households indicate they are motivated by environmental concerns.
Accident detection system project report.pdf
The Rapid growth of technology and infrastructure has made our lives easier. The
advent of technology has also increased the traffic hazards and the road accidents take place
frequently which causes huge loss of life and property because of the poor emergency facilities.
Many lives could have been saved if emergency service could get accident information and
reach in time. Our project will provide an optimum solution to this draw back. A piezo electric
sensor can be used as a crash or rollover detector of the vehicle during and after a crash. With
signals from a piezo electric sensor, a severe accident can be recognized. According to this
project when a vehicle meets with an accident immediately piezo electric sensor will detect the
signal or if a car rolls over. Then with the help of GSM module and GPS module, the location
will be sent to the emergency contact. Then after conforming the location necessary action will
be taken. If the person meets with a small accident or if there is no serious threat to anyone’s
life, then the alert message can be terminated by the driver by a switch provided in order to
avoid wasting the valuable time of the medical rescue team.
SCALING OF MOS CIRCUITS m .pptx
this ppt explains about scaling parameters of the mosfet it is basically vlsi subject
Bituminous road construction project based learning report
Road construction is not as easy as it seems to be, it includes various steps and it starts with its designing and
structure including the traffic volume consideration. Then base layer is done by bulldozers and levelers and after
base surface coating has to be done. For giving road a smooth surface with flexibility, Asphalt concrete is used.
Asphalt requires an aggregate sub base material layer, and then a base layer to be put into first place. Asphalt road
construction is formulated to support the heavy traffic load and climatic conditions. It is 100% recyclable and
saving non renewable natural resources.
With the advancement of technology, Asphalt technology gives assurance about the good drainage system and with
skid resistance it can be used where safety is necessary such as outsidethe schools.
The largest use of Asphalt is for making asphalt concrete for road surfaces. It is widely used in airports around the
world due to the sturdiness and ability to be repaired quickly, it is widely used for runways dedicated to aircraft
landing and taking off. Asphalt is normally stored and transported at 150’C or 300’F temperature
Generative AI Use cases applications solutions and implementation.pdf
Generative AI solutions encompass a range of capabilities from content creation to complex problem-solving across industries. Implementing generative AI involves identifying specific business needs, developing tailored AI models using techniques like GANs and VAEs, and integrating these models into existing workflows. Data quality and continuous model refinement are crucial for effective implementation. Businesses must also consider ethical implications and ensure transparency in AI decision-making. Generative AI's implementation aims to enhance efficiency, creativity, and innovation by leveraging autonomous generation and sophisticated learning algorithms to meet diverse business challenges.
https://www.leewayhertz.com/generative-ai-use-cases-and-applications/
Impartiality as per ISO /IEC 17025:2017 Standard
This document provides basic guidelines for imparitallity requirement of ISO 17025. It defines in detial how it is met and wiudhwdih jdhsjdhwudjwkdbjwkdddddddddddkkkkkkkkkkkkkkkkkkkkkkkwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwioiiiiiiiiiiiii uwwwwwwwwwwwwwwwwhe wiqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq gbbbbbbbbbbbbb owdjjjjjjjjjjjjjjjjjjjj widhi owqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq uwdhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhwqiiiiiiiiiiiiiiiiiiiiiiiiiiiiw0pooooojjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj whhhhhhhhhhh wheeeeeeee wihieiiiiii wihe
e qqqqqqqqqqeuwiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiqw dddddddddd cccccccccccccccv s w c r
cdf cb bicbsad ishd d qwkbdwiur e wetwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww w
dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffw
uuuuhhhhhhhhhhhhhhhhhhhhhhhhe qiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii iqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc ccccccccccccccccccccccccccccccccccc bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbu uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuum
m
m mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm m i
g i dijsd sjdnsjd ndjajsdnnsa adjdnawddddddddddddd uw
Digital Twins Computer Networking Paper Presentation.pptx
A Digital Twin in computer networking is a virtual representation of a physical network, used to simulate, analyze, and optimize network performance and reliability. It leverages real-time data to enhance network management, predict issues, and improve decision-making processes.
一比一原版(uofo毕业证书)美国俄勒冈大学毕业证如何办理
原版一模一样【微信：741003700 】【(uofo毕业证书)美国俄勒冈大学毕业证成绩单】【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理(uofo毕业证书)美国俄勒冈大学毕业证【微信：741003700 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...
The Network on Chip (NoC) has emerged as an effective
solution for intercommunication infrastructure within System on
Chip (SoC) designs, overcoming the limitations of traditional
methods that face significant bottlenecks. However, the complexity
of NoC design presents numerous challenges related to
performance metrics such as scalability, latency, power
consumption, and signal integrity. This project addresses the
issues within the router's memory unit and proposes an enhanced
memory structure. To achieve efficient data transfer, FIFO buffers
are implemented in distributed RAM and virtual channels for
FPGA-based NoC. The project introduces advanced FIFO-based
memory units within the NoC router, assessing their performance
in a Bi-directional NoC (Bi-NoC) configuration. The primary
objective is to reduce the router's workload while enhancing the
FIFO internal structure. To further improve data transfer speed,
a Bi-NoC with a self-configurable intercommunication channel is
suggested. Simulation and synthesis results demonstrate
guaranteed throughput, predictable latency, and equitable
network access, showing significant improvement over previous
designs
一比一原版(USF毕业证)旧金山大学毕业证如何办理
原件一模一样【微信：95270640】【旧金山大学毕业证USF学位证成绩单】【微信：95270640】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
【业务选择办理准则】
一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信：95270640】文凭即可
二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信：95270640】即可
三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
留信网认证的作用:
1:该专业认证可证明留学生真实身份【微信：95270640】
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
→ 【关于价格问题（保证一手价格）
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
办理旧金山大学毕业证毕业证学位证USF学位证【微信：95270640 】外观非常精致，由特殊纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理旧金山大学毕业证USF学位证毕业证学位证【微信：95270640 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理旧金山大学毕业证毕业证学位证USF学位证【微信：95270640 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理旧金山大学毕业证毕业证学位证USF学位证【微信：95270640 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
DESIGN AND MANUFACTURE OF CEILING BOARD USING SAWDUST AND WASTE CARTON MATERI...
The need for ecofriendly materials as building materials in this century cannot be overemphasized
This study Examines the Effectiveness of Talent Procurement through the Imple...
In the world with high technology and fast
forward mindset recruiters are walking/showing interest
towards E-Recruitment. Present most of the HRs of
many companies are choosing E-Recruitment as the best
choice for recruitment. E-Recruitment is being done
through many online platforms like Linkedin, Naukri,
Instagram , Facebook etc. Now with high technology E-
Recruitment has gone through next level by using
Artificial Intelligence too.
Key Words : Talent Management, Talent Acquisition , E-
Recruitment , Artificial Intelligence Introduction
Effectiveness of Talent Acquisition through E-
Recruitment in this topic we will discuss about 4important
and interlinked topics which are
Recently uploaded (20)
smart pill dispenser is designed to improve medication adherence and safety f...
smart pill dispenser is designed to improve medication adherence and safety f...
5G Radio Network Througput Problem Analysis HCIA.pdf
5G Radio Network Througput Problem Analysis HCIA.pdf
Prediction of Electrical Energy Efficiency Using Information on Consumer's Ac...
Prediction of Electrical Energy Efficiency Using Information on Consumer's Ac...
Zener Diode and its V-I Characteristics and Applications
Zener Diode and its V-I Characteristics and Applications
1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf
1FIDIC-CONSTRUCTION-CONTRACT-2ND-ED-2017-RED-BOOK.pdf
Bituminous road construction project based learning report
Bituminous road construction project based learning report
Generative AI Use cases applications solutions and implementation.pdf
Generative AI Use cases applications solutions and implementation.pdf
Digital Twins Computer Networking Paper Presentation.pptx
Digital Twins Computer Networking Paper Presentation.pptx
A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...
A high-Speed Communication System is based on the Design of a Bi-NoC Router, ...
DESIGN AND MANUFACTURE OF CEILING BOARD USING SAWDUST AND WASTE CARTON MATERI...
DESIGN AND MANUFACTURE OF CEILING BOARD USING SAWDUST AND WASTE CARTON MATERI...
This study Examines the Effectiveness of Talent Procurement through the Imple...
This study Examines the Effectiveness of Talent Procurement through the Imple...
ee305-pe-m3-l2-over.pptx
- 1. Dr. Unnikrishnan P.C. Professor, EEE EE305 Power Electronics
- 2. 3-phase Half-wave controlled rectifier with R load • is measured from the point of natural commutation
- 3. •The only difference of this circuit is that the outgoing Thyristor keeps conducting till the incoming thyristor is triggered. •Each device conducts for 120 •Each phase supplies power for 120. •A positive voltage across the blocking thyristor is possible. •Continuous output voltage(0<α<30°) •Discontinuous output voltage (30°<α<150°) 3-phase Half-wave controlled rectifier with R load
- 4. Three Phase Fully Controlled Bridge Converter with R Load •T1, T3, T5 : Common Cathode Configuration •T2, T4, T6 : Common Anode Configuration •If all are diodes, changeover takes place at X,Y,Z and P,Q,R •T5 T1 takes place at X •T6 T2 takes place at P
- 5. = 30
- 6. Three Phase Fully Controlled Bridge Converter with R-L-E Load For any current to flow in the load at least one device from the top group (T1, T3, T5) and one from the bottom group (T2, T4, T6) must conduct. Thyristors are fired in the sequence T1 → T2 → T3 → T4 → T5 → T6 → T1 with 60° interval between each firing. Thyristors on the same phase leg are fired at an interval of 180° and hence can not conduct simultaneously. This leaves only six possible conduction mode for the converter in the continuous conduction mode T1T2, T2T3, T3T4 , T4T5, T5T6, T6T1.
- 7. Three Phase Fully Controlled Bridge Converter with R Load ( = 0)
- 8. Three Phase Fully Controlled Bridge Converter with R Load • =0 is equivalent to an uncontrolled full wave bridge •Thyristors should be fired at X,Y Z and P,Q,R •Each device conducts for 120 •Each phase supplies power for 240 in a cycle provided load current is continuous. •6 Pulses per Cycle, each of 60 . •At any time only two phase supply power to the load and one phase is open.
- 9. Three Phase Fully Controlled Bridge Converter with R Load ( = 30)
- 10. Three Phase Fully Controlled Bridge Converter with R Load ( = 60)
- 11. Three Phase Fully Controlled Bridge Converter with R Load ( = 60) For what firing angle,, the current through the load becomes discontinuous ? For =0 Vo varies from 1.5 V to 1.732 Volts For =30 Vo varies from 0.866 V to 1.732 Volts For =60 Vo varies from 0 V to 1.5 Volts At =60, Vo touches the X-axis, so as the load current. So beyond =60 load current becomes discontinuous.
- 12. Three Phase Fully Controlled Bridge Converter with R Load ( = 90)
- 13. Three Phase Fully Controlled Bridge Converter with R Load ( = 90) For =90 Average value of the output voltage,Vo ,=0 but the current is continuous. When is this possible? This is possible only if the load is purely inductive. (The average value of the voltage across an inductor is 0). For other loads a continuous conduction is not possible for =90.
- 14. Three Phase Fully Controlled Bridge Converter with R Load ( = 120)
- 15. Three Phase Fully Controlled Bridge Converter with R Load ( = 150)
- 16. Converter & Inverter Converter Operation For =0 Vo varies from 1.5 V to 1.732 Volts For =30 Vo varies from 0.866 V to 1.732 Volts For =60 Vo varies from 0 V to 1.5 Volts For =90 Vo varies from -0.866 V to 0.866 Volts Inverter Operation For =120 Vo varies from -0.866 V to -1.5 Volts For =150 Vo varies from -0.866 V to -1.732 Volts
- 17. Question A DC motor (R-L-E Load) speed need to be controlled using a single phase fully controlled converter. What should be the values of at starting and later to increase speed? The natural answer is =90 and then keep on decreasing. At =90, the instantaneous value of the input is maximum and if this is applied to the armature, a very high current will pass through the armature and damage. So the safe value of is around =150and reduce it slowly
- 18. Comparison of various converters The filter requirement reduces with increase in number of pulses per cycle.