In load commutated chopper, the commutating element is capacitor is capacitor an

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Question
In load commutated chopper, the commutating element
Options
A. is capacitor
B. is capacitor and inductor
C. is capacitor, inductor and auxiliary thyristor
D. any of the above depending on load

Correct Answer

is capacitor

Power Electronics problems

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1. In integral cycle control of ac regulators, the period of integral cycle control, i.e., (m + n) T should be
Options
A. less than mechanical or thermal time constant of the system
B. more than the mechanical or thermal time constant of the system
C. more or less than the mechanical or thermal time constant
D. very high

2. Assertion (A): Typical value of thermal resistance from source to sink of an SCR is about 0.3� C/W
Reason (R): Heat sinks of thyristors are generally made of aluminium.
Options
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

6. Assertion (A): A transistor has lower voltage drop during conduction as compared to thyristor
Reason (R): Transistors are manufactured in very high voltage and current ratings.
Options
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

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