Exercise: Power Electronics

Questions for: Power Electronics

The load circuit of a single phase full bridge inverter
A:
must be underdamped
B:
must be overdamped
C:
may be underdamped or overdamped
D:
may be any type of load
Answer: D
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When a single phase dual converter is operating in circulating current mode
A:
both converters are working as rectifiers simultaneously
B:
one converter is always working as rectifier and the other as inverter
C:
only one converter is working at one time
D:
both converters are either working as rectifiers or as inverters simultaneously
Answer: B
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To turn off an SCR, it is necessary to reduce its current to less than :
A:
trigger current
B:
holding current
C:
breakover current
D:
none of the above
Answer: B
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Class A and class B chopper
A:
operate in first quadrant
B:
operate in second quadrant
C:
class A chopper operates in first quadrant while class B operates in second quadrant
D:
may operate in either first or second quadrant
Answer: C
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Assertion (A): Light triggering is very suitable for HVDC transmission.

Reason (R): Light triggering has the advantage of complete electrical isolation of gate circuit.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R correct but R is not correct explanation of A
C:
A is correct but R is wrong
D:
A is wrong but R is correct
Answer: A
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