GATE 2025 Electrical Engineering Q46

Question

The 3-phase modulating waveforms ($v_a(t)$, $v_b(t)$ and $v_c(t)$), used in sinusoidal PWM in a Voltage Source Inverter (VSI) are
$v_a(t) = 0.8 \sin (\omega t)$ V
$v_b(t) = 0.8 \sin (\omega t - \frac{2\pi}{3})$ V
$v_c(t) = 0.8 \sin (\omega t + \frac{2\pi}{3})$ V
where $\omega = 2\pi 	imes 40$ rad/s is the fundamental frequency. The modulating waveforms are compared with a 10 kHz triangular carrier whose magnitude varies between +1 and -1. The VSI has a DC link voltage of 600 V and feeds a star connected motor. The per phase fundamental RMS motor voltage, in volts, is closest to

Accepted Answer

169.71

Answer

300.00

Answer

424.26

Answer

212.13