Difference between revisions of "PWM"
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Revision as of 11:44, 26 March 2012
PWM a.k.a. Pulse width modulation is a voltage waveform usually seen in power electronics such as motor drives and power supplies.
The main idea in PWM is to switch input voltage either fully on or off so rapidly that output device "feels" only the average voltage caused by pulsed voltage.
Contents
Pros and cons
Pros
- Very high efficiency due to low losses in electronics
- Robust
Cons
- Increased |EMI noise compared to linear (non-pulsed) output
