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In voltage commutation, in chopper circuit we use _____________

(a) 2 auxiliary thyristors

(b) 2 diodes

(c) 1 auxiliary thyristor

(d) Many diodes

This question was posed to me in final exam.

This intriguing question originated from DC Motor Control Through Choppers topic in division Motor Control by Static Power Converters of DC Machines

1 Answer

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Best answer
Correct option is (a) 2 auxiliary thyristors

Best explanation: Two auxiliary thyristors are connected in the chopper circuit along with one diode, one inductor, one capacitor in series with the voltage supply which is then connected in parallel with diode and DC motor armature.

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