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Old 11-07-2012, 05:02 PM   #5906 (permalink)
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Location: Maricopa, AZ (sort of. Actually outside of town)
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Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
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It sounds like it's working. It flags an error if the pwm goes to 100% and the current feedback is zero. It's to avoid problems people had in the past with contactors that would open each time the throttle is released. In the case of one poor guy, he stepped on the throttle slowly, which was enough for nonzero throttle to the controller, but not enough to close the contactor. PWM ramped up to 100% trying to get nonzero current feedback, and then the contactor closed with the PWM at 100%, a DEAD SHORT, and the controller got blasted into outer space. This software fix seemed to take care of the problem. At least I haven't heard anything like it since.
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