View Single Post
Old 04-23-2010, 10:29 AM   #1 (permalink)
Master EcoModder
Ryland's Avatar
Join Date: Jan 2008
Location: Western Wisconsin
Posts: 3,903

honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
Thanks: 867
Thanked 433 Times in 353 Posts
Why hub motors in an EV?

Why do people keep pumping money in to the hub motor idea for EV's? the only time I can see a hub motor working well is on a bicycle because it's low speed, the rest of the bicycle is unsprung and you have limited space.
Am I missing something? Reducing unsprung weight is a good idea, so why stick a 50 pound motor in the wheel? the rest of the suspension is going to need to be beefed up, the motor is going to see every bump the tire hits, it's going to be adding to the gyroscopic action of the wheel when you turn to turn the steering wheel, why not put a drive shaft on it with a pair of CV joints if you really want to do a direct drive.
My electric car has the motor mounted on the rear axle, it makes the rear suspension very slow to respond because of that extra weight, I could only imagine having two motors back there.

  Reply With Quote