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Old 09-28-2014, 11:58 AM   #31 (permalink)
thingstodo
Master EcoModder
 
Join Date: Sep 2010
Location: Saskatoon, canada
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ChargE (not yet running) - '92 Mazda MX6 LX
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Quote:
Originally Posted by Astro View Post
Somebody mentioned the pre-charge contactor circuit. I think i will put the emergency cut outs in the earth return that will be used by both the pre-charge and main contactor coils.
I don't think the pre-charge resistor would last long at full current and so wouldn't be a huge issue in a contactor fail on scenario. The pre-charge resistor would act like a fuse at full amps.
The pre-charge resistor limits current into the controller, so it won't be a fuse. The controller gets just enough power to run the electronics, but not to turn the motor.

My precharge gets quite warm if I forget to pull in the main contactor while I'm testing on the bench. I haven't cooked one yet!

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