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Full-converter can be used in DC motor for regenerative braking in ______________

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Full-converter can be used in DC motor for regenerative braking in ______________

(a) Constant operation

(b) Variable operation

(c) Inversion operation

(d) Opposite operation

The question was posed to me during an interview for a job.

Question is taken from DC Motor Control Through Converters topic in section Motor Control by Static Power Converters of DC Machines

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Right option is (c) Inversion operation

For explanation: When α is greater than 900, the average motor voltage becomes negative. If the motor terminals are reversed, then the circuit will act as a generator in order to feed power back to the AC supply. This is the inversion operation of the converter and used in regenerative braking.

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