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In the following circuit, the diodes D1 to D4 are used to

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in Power Electronics by (27.1k points)
In the following circuit, the diodes D1 to D4 are used to

(a) reduce the switching losses

(b) send current back to the dc source when SCRs are off

(c) send current back to the load  when SCRs are off

(d) send current back to the dc source when SCRs are conducting

This question was posed to me in homework.

Question is taken from Single Phase VSI-3 in division Inverters of Power Electronics

1 Answer

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by (45.1k points)
Correct option is (b) send current back to the dc source when SCRs are off

The best I can explain: Diodes are connected in anti-parallel with the SCRs during inductive loads for freewheeling actions.

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