GATE 2019: Power Electronics Quiz 7 (App update required to attempt this test)

A 3-phase voltage source inverter is supplied from a 600V DC source as shown in the figure below. For a star connected resistive load of 20Ω per phase, the load power for 120^o device conduction, in kW is __________.

In a 1-phase bridge inverter,
 

if the load is underdamped, then the load current waveform will be

The single-phase full-bridge voltage source inverter (VSI), shown in figure, has an output frequency of 50 Hz. It uses unipolar pulse width modulation with switching frequency of 50 kHz and modulation index of 0.7. For V ­_in = 100 V DC, L = 9.55mH, C = 63.66 μF and R = 5 Ω, the amplitude of the fundamental component in the output voltage V₀ (in Volt) under steady state is __________.
 

A bridge inverter with an input dc voltage of 240 V, produces an ac output voltage using the sinusoidal PWM. The output voltage has 6 pulses per half cycle with widths π/6, π/3, 2π/3, 2π/3, π/3, π/6 respectively. Determine the rms output voltage [in Volt].

The figure shows one period of the output voltage of an inverter. α should be chosen such that 60° < α < 90°. If rms value of the fundamental component is 50 V, then α in degree is________

The single-phase full-bridge voltage source inverter (VSI), shown in figure, has an output frequency of 50 Hz. It uses unipolar pulse width modulation with switching frequency of 50 kHz and modulation index of 0.7. For V ­_in = 100 V DC, L = 9.55mH, C = 63.66 μF and R = 5 Ω, the amplitude of the fundamental component in the output voltage V₀ (in Volt) under steady state is __________.