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A chopper in a drive converts

  • A.alternating current at one frequency directly to another
  • B.direct current at one voltage to direct current at another
  • C.alternating current to direct current for the dc link
  • D.direct current to alternating current of controlled frequency

Answer: B

Correct answer: direct current at one voltage to direct current at another

A chopper is a dc to dc converter, switching a device on and off to control the mean voltage delivered. In a drive it appears as the braking chopper that dumps regenerated energy into a resistor, and in dc drives as the means of controlling armature voltage.

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