# GATE Questions & Answers of Single Phase and Three Phase Inverters

## What is the Weightage of Single Phase and Three Phase Inverters in GATE Exam?

Total 7 Questions have been asked from Single Phase and Three Phase Inverters topic of Power Electronics subject in previous GATE papers. Average marks 1.57.

In the converter circuit shown below, the switches are controlled such that the load voltage $v_0(t)$ is a $400\;Hz$ square wave.

The RMS value of the fundamental component of $v_\circ(t)$ in volts is __________.

A 3-phase voltage source inverter is supplied from a 600 V DC source as shown in the figure below. For a star connected resistive load of 220 $\Omega$ per phase, the load power for 120° device conduction in kW, is____________.

A three-phase voltage source inverter with ideal device operating in 180° conduction mode is feeding a balanced star-connected resistive load. The DC voltage input is $V_{dc}$. The peak of the fundamental component of the phase voltage is

The figure below shows a half-bridge voltage source inverter supplying an RL-load with $R=40\Omega\;and\;L=\left(\frac{0.3}{\mathrm\pi}\right)H$. the desire fundamental frequency of the load voltage is 50 Hz. The switch control signals of the converter are generated using sinusoidal pulse width modulation with modulation index, M = 0.6 . At  50 Hz, the RL-load draws an active power of 1.44 kW. The value of DC source voltage VDC in volts is

A single-phase full-bridge voltage source inverter (VSI) is fed from a 300 V battery. A pulse of 120o duration is used to trigger the appropriate devices in each half-cycle. The rms value of the fundamental component of the output voltage, in volts, is

A three-phase Voltage Source Inverter (VSI) as shown in the figure is feeding a delta connected resistive load of 30 Ω/phase. If it is fed from a 600 V battery, with 180o conduction of solid-state devices, the power consumed by the load, in kW, 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 = 100V DC, = 9.55 mH, = 63.66 µF, and = 5 $\mathrm{\Omega }$, the amplitude of the fundamental component in the output voltage (in volt) under steady-state is_____________.