speed control of dc motor by chopper

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alex dhaduk

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hello...........
i am using two quadrant chopper for speed control of 1/4 hp,48 volt dc motor with pwm.
then

what will be the switching frequency of the pwm for the MOSFET ????????????????/
 

In principle, you can use almost any frequency. Frequencies in the audio range can result in a whining sound. In my last design of a PWM-controlled motor drive, I used a frequency of about 25kHz.
 

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