AC drives can vary the speed of a motor using which configuration?

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Multiple Choice

AC drives can vary the speed of a motor using which configuration?

Explanation:
Speed control with AC drives works by changing the output frequency (and adjusting voltage to keep a constant V/Hz ratio), so the motor speed follows the commanded frequency. A variable frequency drive can be powered from either a single-phase supply or a three-phase supply, depending on the model and rating. Even if the input is single-phase, many drives convert that to DC and then invert to a three-phase output for the motor. This versatility means the same drive concept applies whether you’re using a single-phase or a three-phase configuration, so “Either” is the best choice.

Speed control with AC drives works by changing the output frequency (and adjusting voltage to keep a constant V/Hz ratio), so the motor speed follows the commanded frequency. A variable frequency drive can be powered from either a single-phase supply or a three-phase supply, depending on the model and rating. Even if the input is single-phase, many drives convert that to DC and then invert to a three-phase output for the motor. This versatility means the same drive concept applies whether you’re using a single-phase or a three-phase configuration, so “Either” is the best choice.

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