Quote:
Originally Posted by MPaulHolmes
Definitely make sure the contactor stays closed. If it opens, and you use some power, it could run the capacitor all the way to 0v, and then when the contactor closes again, the capacitor will get hammered with like 10,000amp for an instant.
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I think that turned out to be low voltage on the 12V battery.
And I agree that it would be .. *BAD* .. if the controller continued on the test. I don't think that happened (or I would have another welded contactor)
I think what happened with the first one is that I left the high voltage on during a hex file load. That cycles power to the outputs a few times ... and if the bus was not high enough, it would have welded the contacts.
A low voltage cut-out may be something to consider in the future. If the controller does not lose power but the contactors drop out ...