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how to control the rpm of pmdc motor? Answered

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steveastrouk (author)2014-02-13

speed is proportional to

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iceng (author)2014-02-13

Easily done with PWM ( Pulse Width Modulation ) electronics.

If you also want to hold RPM ( speed ) constant as the motor experiences a change of load, you need a tachometer feedback to help change the PWM value as necessary to maintain the set RPM.

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