Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Paul and Sabrina's Cheap 3 Phase Inverter (AC Controller) with Field Oriented Control

MPaulHolmes · 11-26-2009, 06:51 PM

I heard that industrial motors don't work very well in EVs because they are often being driven with a more simplistic V/Hz = constant approach by modified inverters that were for industrial purposes. With field oriented control, the motor has considerably less heat loss, and a greater amount of the DC voltage makes it to the motor, and has the same torque control as what you can have with a brushed DC motor, but with the added bonus of regenerative braking.

I think it's all in the control software. I believe the industrial motors can have significantly higher power than they are rated for. Let's hope so! There ain't nothing like just trying it and seeing what horrible thing happens!

Edit: Actually, I read up on it, and I'm not sure now. hehe. I hope there are cheap used motors that turn out to work OK.

11-26-2009, 06:51 PM	#82 (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: 1,362 Thanked 1,202 Times in 765 Posts	I heard that industrial motors don't work very well in EVs because they are often being driven with a more simplistic V/Hz = constant approach by modified inverters that were for industrial purposes. With field oriented control, the motor has considerably less heat loss, and a greater amount of the DC voltage makes it to the motor, and has the same torque control as what you can have with a brushed DC motor, but with the added bonus of regenerative braking. I think it's all in the control software. I believe the industrial motors can have significantly higher power than they are rated for. Let's hope so! There ain't nothing like just trying it and seeing what horrible thing happens! Edit: Actually, I read up on it, and I'm not sure now. hehe. I hope there are cheap used motors that turn out to work OK. __________________ kits and boards Last edited by MPaulHolmes; 11-26-2009 at 09:28 PM..