GATE 2022 : Power Electronics Quiz- 1 (App update required to attempt this test)

The circuit shown below, the conduction time of T, is _______(μsec).

Assume: L = 1 mH, I_L(0^–) = 0 A, C = 1 μF and V_C(0^–) = 100 V

In case of voltage source inverter, freewheeling can be needed for the load of

A 3-phase full converter feeds power to a resistance load of 10 Ω. For a firing angle of 30°, the load takes 5 kW. The magnitude of per phase input supply voltage is:

A 3-phase, full bridge converter supplied by 230 V/phase having 50 Hz frequency. Its source inductance is 4 mH. It’s load side current is DC and is 20 A. For load having DC source of 400 V and 1 Ω resistance, then the approximated value of firing angle is _________.

For a step-up chopper, thyristor conducting time is 100 μsec. The pulse with of output voltage is ____μsec if input voltage is 220 V and Output voltage is 660 V.

PWM switching is preferred in voltage source inverters for the purpose of