Hi all ...

I know this subject has been discussed many times before,
I have been through the archives but still find myself puzzled !!

My problem is this - can anybody help me out with a correct
routine for determining the best pwm frequency for a particular
motor.

Eg - I have a 12volt brushed Dc motor of unknown size ( Watts
should be easilly determinable with a bit of Ohms law )

I wish to drive it forward only, using pwm and fets ( pwm being
generated by CCP engine ) - I am not EE trained but am
comfortable with electricky, it strikes me that there are several
variables which can be combined into a loose rule of thumb.

Well thats it - simply put, which is the best freq to drive a Dc
motor using pwm and how to determine it ??

Thanks for your time.

Steve



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