The VFD is an example of what type of control?

Master the Motor Controls Level 3 Test. Engage with flashcards and detailed multiple-choice questions, complete with hints and thorough explanations. Prepare effectively for your exam!

Multiple Choice

The VFD is an example of what type of control?

Explanation:
VFDs typically set motor speed by adjusting output frequency and voltage according to a preset schedule, without measuring or correcting for the actual motor speed. In this basic mode, there’s no feedback loop, so it’s open-loop control. If speed feedback from the motor were used to continuously correct the output, it would become closed-loop control. Servo systems are a type of closed-loop with feedback, not a simple stand-alone control. So the VFD shown is an example of open-loop control.

VFDs typically set motor speed by adjusting output frequency and voltage according to a preset schedule, without measuring or correcting for the actual motor speed. In this basic mode, there’s no feedback loop, so it’s open-loop control. If speed feedback from the motor were used to continuously correct the output, it would become closed-loop control. Servo systems are a type of closed-loop with feedback, not a simple stand-alone control. So the VFD shown is an example of open-loop control.

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