Industrial electronics DM thread

How square switching makes a sine wave

Name: How square switching makes a sine wave
Uploaded: 2026-11-08T17:35:15.693Z
Duration: 1 min 11 s
Description: My inverter only switches on and off. How is the output sinusoidal?

My inverter only switches on and off. How is the output sinusoidal?

Lesson notes

Takeaway: SPWM: sine vs triangle sets pulse widths that average to a sine.

Quick check: In SPWM, the sine reference is compared with what signal?

A triangular carrier
A DC reference
A square clock

Crossing points of sine and triangle set the switching instants.

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