Power Electronics and Drives

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latex codes

  x^2+3

is called

$latex \cos (2\theta) = \cos^2 \theta – \sin^2 \theta $

$latex \left ( \int cos\alpha \int sin\alpha  \right )

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How Freewheeling Diode Works? (Flyback Diode Working Principle)

How Freewheeling Diode Works? (Flyback Diode Working Principle)

How Freewheeling Diode Works? 

We know that one of the major application of the PN junction diode is using as a Flyback diode or Freewheeling diode. The below figure shows partial circuit of a power electronics circuit. In this circuit, the diode D is a freewheeling diode. To know about How Freewheeling Diode Works, remember the following points:

To understand the operation of power electronics…

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Difference between HVDC and HVAC Transmission

Difference between HVDC and HVAC Transmission

Comparison of HVAC and HVDC Transmission

In this short post, let us discuss about the difference between HVDC and HVAC Transmission. Before proceeding further, let us quickly refresh about the fundamentals of the High Voltage DC Transmission (HVDC) and the High Voltage AC Transmission(HVAC).

Recommended Posts to Read: HVDC Transmission System Basics, Block Diagram, Working  HVDC Advantages,…

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MOSFET Switching Characteristics

MOSFET Switching Characteristics:

To understand the switching characteristics of MOSFET, let us refresh about the equivalent model of the MOSFET. The simple equivalent circuit for a n-channel MOSFET is given below, Here CGS = gate to source parasitic capacitance CGD = gate to drain parasitic capacitance. RB = Base Resistance RG = Gate Resistance

Recommended Posts: Power MOSFET Basics  Power MOSFET…

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Comparison of Punch Through IGBT and Non-Punch Through IGBT

Comparison of Punch Through IGBT and Non-Punch Through IGBT

Comparison of Punch Through IGBT and Non-Punch Through IGBT:

Based on the structure, the Insulated Gate Bipolar Transistor (IGBT) can be classified as (1) Punch Through IGBT and (2) Non-Punch Through IGBT In this post let us discuss about the difference between Punch-Through IGBT and the Non-Punch Through IGBT. Before proceeding further, it is good to refresh about the basics of IGBT.  The…

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How to Reduce Filter Components Size in DC - DC Converters? - Interleaved Converters

How to Reduce Filter Components Size in DC – DC Converters? – Interleaved Converters

How to Reduce Filter Components Size in DC – DC Converters?

In this short post let us discuss about the technique to reduce the size of filter components in the converter circuits in detail… Before proceeding further it is recommended to refresh about the basics of buck converter. Please click here to know about the Buck Regulator basics, working principle and operation 

Compare to the Linear…

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Chopper control Techniques - Chopper Control Methods

Chopper control Techniques – Chopper Control Methods

Chopper control Strategies:

We know that basics of chopper in our previous posts. In this post let us see about various control techniques for chopper circuits. So what is meant by control strategies or techniques of chopper circuit? A basic dc chopper circuit is shown in the below figure. Here the SCR (T1) acts alike a static switch. The SCR can be turned ON and turned OFF with the help of…

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Buck Boost Topology Tutorial: How Buck Boost Converter Works?

Buck Boost Topology Tutorial: How Buck Boost Converter Works?

Buck Boost Topology Tutorial: How Buck Boost Converter Works?

In our previous posts we have seen the operation of buck converter and boost converter. In this post, let us discuss about another basic switched-mode converter (ie, Buck-boost converter).

The output voltage of this regulator can be more (boost) or less (buck) than the input voltage. Thus it is named as buck-boost regulator.

You may…

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Energy Recovery Snubber Circuits for Transistor

Energy Recovery Snubber Circuits for Transistor

Transistor Energy Recovery Snubber Circuits:

In this post let us see how the charges stored in the snubber circuit can be recovered and thus reduce overall circuit power loss…

Points to remember about Snubber Circuits:

Snubber circuits reduce the power dissipated in the transistor by storing the energy in the snubber capacitor.

But this stored energy is dissipated in the snubber resistor.

For…

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Power Transistor Snubber Circuits

Power Transistor Snubber Circuits

Power Transistor Snubber Circuits

Few points to remember about Snubber Circuit:

Snubbers are circuits that limit the rate of rise of voltage across the power switch and/or the rate of rise of current so as to modify the switching trajectory, limit the peak power dissipation and protect the switch against excessive rate of rise of current or voltage.

The snubber circuit is used to limit the…

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Transistor Anti saturation control - How to Provide Anti-saturation Control for BJT?

Transistor Anti saturation control – How to Provide Anti-saturation Control for BJT?

Transistor Anti-saturation Control: We have discussed about the Basics, structure and the base drive circuits of the Power BJT in out previous posts. In this post let us discuss about one of the important protection circuit used for proper operation of Power transistor. ie anti-saturation control circuit of Power BJT. You may like to refresh about Power BJT: Power BJT Basics  Power BJT Safe…

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Boost Regulator Tutorial: Topology Working Advantages Applications

Boost Regulator Tutorial: The boost regulator gives higher output voltage than the input voltage. It is similar to that of setup chopper. The circuit diagram of the boost converter is shown below: Boost Converter Operation: To understand the operation, assume that the switch is turned on and conducts from 0 to T/2. So during that time, the current flows in the inductor (Vs – L – SW). The inductor…

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Step Up Chopper - Basics, Operation, Application

Step Up Chopper – Basics, Operation, Application

Step Up Chopper – Basics, Operation, Application In our previous posts, we have discussed about the Basics of Chopper and Classification. Different types of chopper like Class-A, Class-B, Class-C, Class-D and Class-E are covered already. In this post let us discuss about the step up chopper. Before proceeding further it is recommended to read about the chopper circuit basics… Step Up Chopper: A…

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Power Electronics Two Marks Questions and Answers

Power Electronics Two Marks Questions and Answers [1] How choppers are classified based on commutation technique? Chopper circuits are classified into two types based on the methods of turn off process (commutation). They are Voltage commutated Chopper Current commutated chopper [2] How choppers are classified based on quadrant of operation? Class-A or Type-A Class-B or Type-B Class-C or Type-C…

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Diode Switching Characteristics (Reverse Recovery Characteristics)

Diode Switching Characteristics (Reverse Recovery Characteristics): We have already discussed about the Power diode basics and Power diode Structure in our previous posts. In this post let us see the dynamic characteristics of the power diode…. Unlike in majority-carrier devices like Schottky diodes, forward current in power diodes, is due to the flow of electrons as well as holes. This current…

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AC Voltage Converters (Phase Controlled Converters) - An Introduction

AC Voltage Converters (Phase Controlled Converters) – An Introduction

AC voltage Converters: We have discussed already about various power electronics converter circuits in our previous posts…. In this post let us discuss about the AC voltage Converter circuits… We know that a power electronic Circuit which converts DC into AC is known as Rectifier (or simply converters) Circuit converting DC into DC with varying the voltage level is known as Choppers. Circuit…

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How Jones Chopper Works?

Jones Chopper Working Principle Tutorial: We have seen already about the basic of chopper circuits, various types of chopper circuits…. In this post let us discuss about the operation of Jones Chopper.. Remember that, Jones Chopper is the example for Voltage Commutated Chopper. Morgan Chopper is the example for the Current Commutated Chopper. Before proceeding further, it is recommended to read…

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