View Single Post
Old 02-20-2020, 01:42 PM   #7324 (permalink)
MPaulHolmes
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,832

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,362
Thanked 1,202 Times in 765 Posts
Oh, yes if the contactor was making intermittent contact, during the times it was not making contact, the pwm would ramp up to 100% trying to force the current feedback to match the throttle position (50% of throttle forces 50% of max current feedback with the PI control loop). Then, with the duty at 100%, if the contactor suddenly made good contact again, BOOM. Dead short circuit for a moment. That would definitely trip the desat or the overcurrent fault.
__________________
kits and boards
  Reply With Quote
The Following User Says Thank You to MPaulHolmes For This Useful Post:
jedsmd (02-20-2020)