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

MPaulHolmes · 09-07-2010, 09:12 PM

princeton: No, the motor has inductance becasue of the coils inside (well it would anyway,but it has more inductance becasue of that), so the current wants to keep flowing, and if you just shut off the mosfets, and don't give the current anywhere to go, it will piledrive through the mosfets from drain to source.

1000amp controller total cost in parts would be very similar to total cost of regular 500amp controller. Maybe an extra $20 or so in metal. So in modest bulk, probably $350, but I don't know how well it will work yet. haha.

Optimal number of farads: infinity. But that's not practical.

09-07-2010, 09:12 PM	#3734 (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	princeton: No, the motor has inductance becasue of the coils inside (well it would anyway,but it has more inductance becasue of that), so the current wants to keep flowing, and if you just shut off the mosfets, and don't give the current anywhere to go, it will piledrive through the mosfets from drain to source. 1000amp controller total cost in parts would be very similar to total cost of regular 500amp controller. Maybe an extra $20 or so in metal. So in modest bulk, probably $350, but I don't know how well it will work yet. haha. Optimal number of farads: infinity. But that's not practical. __________________ kits and boards Last edited by MPaulHolmes; 09-07-2010 at 09:24 PM..