"Eisboch" wrote in message
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wrote in message
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On Thu, 29 Nov 2007 20:12:22 GMT, Short Wave Sportfishing
wrote:
On Thu, 29 Nov 2007 13:12:52 -0500, wrote:
Another big breakthrough in electric motor efficiency is PWM, or
"pulse width modulation" used for controlling the speed
Sorry - I didn't see your answer until it was too late.
Thanks for the backup! LOL
Is it used in both AC induction motors as well as DC permanent magnet
motors?
Eisboch
Yup, the PWM on AC just allows a wider part of the max voltage part of a
sine wave to be passed to the motor.