Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Paul & Sabrina's cheap DIY 144v motor controller

MPaulHolmes · 04-10-2009, 09:13 PM

And, it took several times of doing things out of that sequence before the bike's mosfets failed shorted. hmmm..... Oh the mystery of it all!

Me gustan los mysteries!

Having the controller control the contactor and pre-charge resistor would eliminate that potential problem.

I feel pretty sure that's what happened. The mosfets have a capacitive component to them. Each one had a 10kOhm resistor leading from gate to ground, so the overall resistance to ground was 1kOhm. I wonder what the time constant was?

04-10-2009, 09:13 PM	#862 (permalink)
MPaulHolmes PaulH 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: 1,368 Thanked 1,202 Times in 765 Posts	And, it took several times of doing things out of that sequence before the bike's mosfets failed shorted. hmmm..... Oh the mystery of it all! Me gustan los mysteries! Having the controller control the contactor and pre-charge resistor would eliminate that potential problem. I feel pretty sure that's what happened. The mosfets have a capacitive component to them. Each one had a 10kOhm resistor leading from gate to ground, so the overall resistance to ground was 1kOhm. I wonder what the time constant was? __________________ kits and boards Last edited by MPaulHolmes; 04-10-2009 at 09:22 PM..