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Why we use PWM to control the speed DC motor?

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impakt

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DC motor question

Why should we use PWM to control the speed of the motor and not A/D converter?
 

Re: DC motor question

Because the pwm is an output and the A/D is an input, also even if you had a D/A converter you would use the pwm because it's more suitable to drive a motor.
PWM - Pulse width modulation, this means that the output is fully on or off and this reduces losses in the motor driver, if you used a D/A you would have lots of losses.
 

    impakt

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DC motor question

Most peocessors have the PWM modules,thew work as D/A convertor
 

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