Comparison of Series and Parallel Inverters Sr. No Parameter Series Inverter Parallel Inverter 1. Position of commutating components In series with load C is in parallel with load 2. Type of commutation Class A Class C or D 3. Type of inverter Self commutated Forced commutated 4. Resonant circuit Necessary Not necessary 5. Output transformer … Read more

Equations for the Average and RMS Load Voltage of Chopper Q. For a first quadrant chopper operating on a dc voltage v volts, plot the variation of the average load voltage with the duty cycle D. The equations for the average and rms load voltage are VLdc = D x C Table gives the values … Read more

Improved Series Inverter [Type 2] Circuit diagram of Improved Series Inverter : Figure A shows the circuit diagram of the improved series inverter (type 2). In the basic series inverter circuit, the power delivered to the load was taken from the DC source in only one half cycle (in +ve half cycle). In the – ve … Read more

Improved Series Inverter [Type 1] Circuit Diagram of Series Inverter : One of the major disadvantages of the basic series inverter circuit is the limitation on its maximum output frequency. This can be overcome by the improved series circuit shown in Figure A. The output frequency can be increased by turning on SCR2 even before SCR1 is turned off. … Read more

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

Classification and applications of Inverters Classification of Inverter Based on the Nature of Source : The inverters can be classified on the basis of a number of factors, the first one being the type of source it uses at its input. Depending on the nature of input power source the inverters are classified into two … Read more

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 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, 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