Electrical Engineering: Power Electronics MCQ
In the circuit shown,the input V is a sinusoidal AC voltage having an RMS value of 230 ± 20%. The worst-case peak – inverse voltage seen across any diode is ____ V.
A single -phase full – bridge inverter fed by a 325V DC produces a symmetric quasi-square waveform across `ab` as shown. To achieve a modulation index of 0.8 the angle θ expressed in degree should be ____
(Modulation index is defined as the ratio of the peak of the fundamental component of A single -phase full – bridge inverter fed by a 325V DC produces a symmetric quasi-square waveform across `ab` as shown. To achieve a modulation Vab to the applied DC value)
A CMOS Schmitt-trigger inverter has a low output level of 0V and a high output level of 5V. It has thresholds of 1.6 V and 2.4V. The input capacitance and output rsistance of the schmitt-trigger are negligible. The frequency of the oscillator shown is _____Hz
consider the boost converter shown.Switch Q is operating at 25khz with a duty cycle of 0.6. Assume the diode and switch to be ideal.Under steady-state condition ,the average resistance Rin as seen by the source is ____Ω
In the BJT circuit shown, beta of the PNP transistor is 100. Assume VBE = -0.7 V. The voltage across RC will be 5V when R2 is ____kΩ.