Explain DIAC with construction and characteristics.
[3 marks]Explain IGBT with construction and characteristics.
[4 marks]Enlist various commutation circuit of SCR. Explain any one voltage commutation circuit.
[7 marks]What is snubber circuit? Explain working and application for same.
[3 marks]Explain UJT relaxation oscillator.
[4 marks]Explain working of series connected SCRs.
[7 marks]Explain working of parallel connected SCRs.
Explain duty cycle and chopper frequency.
[3 marks]Explain harmonics in power electronic circuit and enlist harmonic sources.
[4 marks]Explain cuk converter in detail.
[7 marks]What is pulse transformer and opto-coupler?
[3 marks]Explain significance of freewheeling diode in controlled rectifiers.
[4 marks]Draw necessary waveforms and explain working of single phase full controlled rectifier circuit with R-Lload.
[7 marks]What do you mean by continues conduction mode and discontinues conduction mode of operation in choppers.
[3 marks]Explain jone’s chopper in short.
[4 marks]Write brief note on buck-boost converter.
[7 marks]Give difference between voltage and current commutated choppers.
[3 marks]Draw and explain RC triggering circuit for SCR.
[4 marks]Explain 3 phase full wave rectifier with Rload.
[7 marks]Explain basic principles for speed control of DC motor.
[3 marks]Explain the principle of motoring control of separately exited DC motor with phase controlled converter.
[4 marks]Explain single phase full converter drive feeding separately exited dc motor for continuous conduction mode.
[7 marks]What is regenerative braking? Explain w.r.t. DC motor speed control.
[3 marks]Write short note on single phase dual converter.
[4 marks]Explain operation of four quadrant DC motor using chopper circuit.
[7 marks]