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17' Mahogany runabout just completed
"Eisboch" wrote in message ... wrote in message ... 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. |
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