ECE :: Power Electronics
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A thyristor circuit is feeding an R-L load. The turn on time can be reduced by
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A single phase semiconverter is supplying RLE load and has a freewheeling diode across the load. The firing angle is a. The freewheeling diode conducts for
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In a full bridge inverter fed by a battery of voltage V, the rms value of fundamental component of output voltage is
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In a single phase full wave regulator feeding a resistive load, the average current over one full cycle
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Two single phase semi-converters are connected in series to form a series converter. The input is v = Vm sin ωt and a1, a2 are the firing angles. If a1 = 0, the dc output voltage is
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Assertion (A): Chopper always requires forced commutation
Reason (R): Morgan chopper uses a saturable reactor.
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In a power diode the reverse recovery time is the time from the instant the forward current is zero to the instant when reverse recovery current has decayed to
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Assertion (A): McMurray Bredford half bridge inverter uses complementary commutation
Reason (R): Three phase inverter can have two modes of operation.
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A capacitor C farads is charged to a voltage V. It discharges through a thyristor, a diode and an inductance L. The peak current in the circuit is
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