Power Electronics

Disadvantages and Limitations of basic Series Inverter

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Disadvantages and Limitations of basic Series Inverter Limitation on the maximum operating frequency : The maximum frequency of operation is restricted to the resonant frequency of the resonant circuit formed by commutating components. Fmax = 1 / 2 π √L1C1 This is because SCR2 can be turned on only after SCR1; is turned off otherwise there … Read more

Basic Series Inverter (Self Commucated Inverter)

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Basic Series Inverter (Self Commucated Inverter) Circuit diagram of Series Inverter : The series inverter uses a class A type commutation. The commutating components L1, C1 are connected in series to form an underdamped tuned circuit. The basic series inverter is as shown in Figure A. Since the  SCRs turn off themselves this circuit is known as self commutated inverter. … Read more

Introduction of Inverter Circuit

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Introduction of Inverter Circuit Definition of Inverter : Inverter is another category of converters, which converts dc input power into ac output power. Therefore inverters are also known as dc to ac converters. The application areas for the inverters include the Uninterrupted Power Supply (UPS), the ac motor speed controllers, etc. Block Diagram of Inverter : … Read more

Output Voltage, Output Current, Source Current and Thyristor Current Waveform for Type C chopper

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Output voltage, output, source and thyristor current waveform for type-c chopper Sketch output voltage, output current, source current and thyristor current waveform for type-C chopper. Indicate the conduction of various devices. The required waveforms are as shown in Figure A and B. Waveforms of Class C Chopper : Figure A Figure B

Applications and Features of a Chopper

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Applications and Features of a Chopper Applications of choppers : D.C. motor speed control. D.C. voltage boosting. Battery operated electric cars. Battery operated appliances. Battery chargers. Features of Chopper : Chopper produces a variable dc voltage from a fixed dc input voltage. It produces a rectangular output voltage. It can operate in four quadrants of … Read more

Jone’s Chopper

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Jone’s Chopper Jone’s chopper is a thyristorised chopper. That means an SCR is used as a chopper switch. When an SCR is operated on the DC power supply it cannot turn off naturally. So we have to include a circuit called commutation circuit to turn off the conducting SCR. Circuit diagram : The circuit diagram … Read more

Morgan Chopper

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Morgan Chopper Q. How Morgan Chopper does work? Q. Morgan Chopper working, waveforms & applications in power electronics Q. Why do we use a saturated reactor in a Morgan’s chopper? Circuit diagram of Morgan Chopper : Figure A shows the circuit diagram of the Morgan chopper. SCR T1 is the main thyristor. D ,C and the sable reactor (SR) … Read more