List of top Power Electronics and Drives Questions on Power factor and Distortion Factor of ac to dc converters

The voltage at the input of an AC-DC rectifier is given by \( v(t) = 230\sqrt{2} \sin(\omega t) \) where \( \omega = 2\pi \times 50 \, \text{rad/s} \). The input current drawn by the rectifier is given by \[ i(t) = 10 \sin\left(\omega t - \frac{\pi}{3}\right) + 4 \sin\left(3\omega t - \frac{\pi}{6}\right) + 3 \sin\left(5\omega t - \frac{\pi}{3}\right) \] The input power factor (rounded off to two decimal places) is _________.

For the ideal AC-DC rectifier circuit shown in the figure below, the load current magnitude is \( I_{\text{dc}} = 15 \, \text{A} \) and is ripple free. The thyristors are fired with a delay angle of 45°. The amplitude of the fundamental component of the source current, in amperes, is ________. (round off to two decimal places)

A charger supplies 100 W at 20 V for charging the battery of a laptop. The power devices, used in the converter inside the charger, operate at a switching frequency of 200 kHz. Which power device is best suited for this purpose?