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Old 06-20-2009, 04:33 PM   #120 (permalink)
jyanof
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Quote:
Originally Posted by MPaulHolmes View Post
great idea! Hey, why does the pack have to be isolated from the charger? There is no motor and no switching 500amps or whatever.
i think isolating the power section of the charger from the control section will reduce noise in the control section. it may not be 500A, but 30A is still significant. I didn't isolate it when i ran it with just the 555 timer supplying the pwm, but I wasn't doing any ADC conversions either.

another issue is that the battery (-) is not always at the same voltage as the rail (-) from the output of the rectifier diode. or, maybe it's never at that voltage... anyway, I think isolating the voltage measurement may make things easier.
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