ECE :: Power Electronics
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In a 3 phase bridge inverter, the gating signals for the three phases have a phase difference of
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Assertion (A): The circuit of figure thyristor will conduct for 180° during positive half cycle if it is continuously fired.
Reason (R): A thyristor can conduct only when it is forward biased.
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The total number of leads in SCR, DIAC and TRIAC respectively are
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A single phase semiconverter is feeding a highly inductive load and has a freewheeling diode across the load. The waveshape of input current is
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In the below figure, the load is highly inductive. The firing angle is a for each of the thyristors. The periods of conduction of Th1 and Th2 respectively are
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Forward
rating of an SCR is -
The method of triggering SCS is
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A.
the maximum rate of rise of anode voltage which will trigger the SCR
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B.
the maximum rate of rise of anode voltage which will not trigger the SCR if gate signal is applied
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C.
the maximum rate of rise of anode voltage which will not trigger the SCR if gate signal is not applied
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D.
either (b) or (c)
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