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

isaac_alaska · 03-24-2011, 01:15 AM

i'm fairly certain that the motor voltage limit is only because of the rpm limit of the motor (higher voltage=higher rpm.) running much over 200 could lead to the motor over-revving and damaging itself i think. i'm not POSITIVE on this though, i need to contact the motor manufacturer and see what they say. We've added different brushes and bearings to the motor already that increased the voltage limit a little from stock, but i'll need to check and see what the insulation breakdown voltage is.

but yeah, everything you said is correct.

If the voltage pulses are a problem i could probably come up with a low pass filter circuit that would average the voltage...essentially the same thing that happens in a rectifier. i'm not sure how pre-charge would be taken care of though.

03-24-2011, 01:15 AM	#4542 (permalink)
isaac_alaska EcoModding Apprentice Join Date: Mar 2011 Location: alaska Posts: 141 Thanks: 10 Thanked 37 Times in 19 Posts	i'm fairly certain that the motor voltage limit is only because of the rpm limit of the motor (higher voltage=higher rpm.) running much over 200 could lead to the motor over-revving and damaging itself i think. i'm not POSITIVE on this though, i need to contact the motor manufacturer and see what they say. We've added different brushes and bearings to the motor already that increased the voltage limit a little from stock, but i'll need to check and see what the insulation breakdown voltage is. but yeah, everything you said is correct. If the voltage pulses are a problem i could probably come up with a low pass filter circuit that would average the voltage...essentially the same thing that happens in a rectifier. i'm not sure how pre-charge would be taken care of though. Last edited by isaac_alaska; 03-24-2011 at 01:21 AM..