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  1. Greenplaid

    PWM DC MOTOR at low frequency...

    Thanks for all the replies guys! So, the concept of excessive heating becomes the issue. If the frequency is too low... The OFF time of the PWM DC is sufficiently long enough to allow the back EMF to conduct throught the reverse protection diodes of the drive mosfets... thus during this time...
  2. Greenplaid

    PWM DC MOTOR at low frequency...

    Does anyone know the pitfalls of operating a low power DC motor with a PWM at a lower frequency? For example: 12VDC Motor @ .250-.500 Amps... yes, 250-500 milli-Amps Things I do know: If the PWM frequency is too low, the ripple on the current waveform will be very high. Higher frequency PWM...
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