5EE7 POWER ELECTRONICS LAB-III

1  Study the comparison of following power electronics devices regarding ratings, performance

characteristics and applications: Power Diode, Power Transistor, Thyristor, Diac, Triac, GTO,

MOSFET, MCT and SIT.

2  Determine V-I characteristics of SCR and measure forward breakdown voltage, latching and

holding currents.

3  Find V-I characteristics of TRIAC and DIAC.

4 Find output characteristics of MOSFET and IGBT.

5  Find transfer characteristics of MOSFET and IGBT.

6  Find UJT static emitter characteristics and study the variation in peak point and valley point.

7  Study and test firing circuits for SCR-R, RC and UJT firing circuits.

8  Study and test 3-phase diode bridge rectifier with R and RL loads. Study the effect of filters.

9  Study and obtain waveforms of single-phase half wave controlled rectifier with and without

filters. Study the variation of output voltage with respect to firing angle.

10  Study and obtain waveforms of single-phase half controlled bridge rectifier with R and RL

loads. Study and show the effect of freewheeling diode.

11  Study and obtain waveforms of single-phase full controlled bridge converter with R and RL

loads. Study and show rectification and inversion operations with and without freewheeling

diode.

12  Control the speed of a dc motor using single-phase half controlled bridge rectifier and full