PYQs Based test 23: Power Electronics

Figure (i) shows the circuit diagram of a chopper. The switch s in the circuit in the figure (i) is switched such that the voltage V${}_D$ across the diode has the waveshape as shown in the figure (ii). The capacitance C is large so that the voltage across it is constant. If the switch s and diode d are ideal

The peak to peak ripple (in A) in the inductor current is-

A full-bridge converter supplying an RLE load is shown in figure. The firing angle of the bridge converter is 120º. The supply voltage $v_m\left(t\right)=200\pi sin\left(100\pi t\right)V$, $R=20\Omega ,E=800V$. The inductor L is large enough to make the output current $I_L$ a smooth dc current. Switches are lossless. The real power fed back to the source, in $kW$, is __________.

A three-phase Voltage Source Inverter (VSI) as shown in the figure is feeding a delta connected resistive load of $30\Omega /phase$. If it is fed from a $600V$ battery, with $180^o$ conduction of solid-state devices, the power consumed by the load, in $kW$, is __________.

In the circuit shown all elements are ideal and the switch S is operated at 10 kHz and 60% duty ratio. The capacitor is large enough so that the ripple across it is negligible and at steady state acquires a voltage as shown. The peak current in amperes drawn from the 50 V DC source is _________. (Give the answer up to one decimal place.)

A DC-DC buck converter operates in continuous conduction mode. It has 48 V input voltage, and it feeds a resistive load of 24 Ω. The switching frequency of the converter is 250 Hz. If switch-on duration is 1 ms, the load power is