Industrial electronics DM thread

Why Switch Fast Instead of Dimming Smoothly?

Name: Why Switch Fast Instead of Dimming Smoothly?
Uploaded: 2026-11-08T15:10:16.545Z
Duration: 1 min 11 s
Description: Why do motor drives chop the voltage instead of reducing it?

Why do motor drives chop the voltage instead of reducing it?

Lesson notes

Takeaway: PWM: average voltage = duty cycle × supply, with efficient switching.

Quick check: With a 24 V supply and 25% duty cycle, what is the average output voltage?

18 V
6 V
12 V

Average voltage equals duty cycle times supply: 0.25 × 24 V = 6 V.

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