BARC EE : Power Electronics Quiz-2

A thyristor switching circuit is shown below. The thyristor is rated for a latching current of 5 mA and is turned on within 5 sec. the value of inductance is

For 1-phase semi-converter, the average value of freewheeling diode current is _____ A, if average load current is 10 A and firing angle is 45°.

Out of the following Power Electronic devices, which is not a current triggering device?

The RMS output voltage of lowest harmonic component in a step-down chopper if the output voltage is 20V & the width of pulse is 1/6^th of the total time period.

In the 180° mode VSI. The total number of devices conduct at a time are:-

The minimum frequency of the output voltage ripple in a three phase half

wave uncontrolled rectifier is _______times the input voltage frequency.

In circulating current type dual converter, even after maintaining ∝₁+∝₂= 180°, still there is some current between the converter. This current can be reduced using.

Below figure shows the output voltage waveform of resistive load. The shown waveform can be obtained by (where T is time period).

The Boundary conditions for M-3 and B-6 converters are respectively.

In voltage commutated chopper, peak inverse voltages of semiconductors follows the relation