Posts Tagged ‘electric motor adapter’

Connecting the Motor

Restoring and Building | Posted by admin December 3rd, 2008

Connecting the electric motor to the Corvair transmission has required a lot of thought. My first reaction to the fly wheel and clutch plates when we took off the motor was that they added a lot of weight and were they needed in an EV. If you aren’t aware, any weight that is spinning in a vehicle does a lot to reduce acceleration. Eliminating a pound of spinning weight is like removing 3 pounds of normal weight so having this big flywheel and clutch in the car was a lot of weight that could be removed. Since an electric motor comes to a complete stop when the power is removed, you don’t have to disconnect it like you do an gas engine which continues to spin even when it idles. After talking to some of the guys at the local EAA club I decided that I was going to eliminate the clutch all together. The reality is that my math shows that almost 90% of my normal driving can be done entirely in 2nd gear. Only on the highway would I need to shift to 3rd and only if I wanted to really fly would I go to fourth.

The Warp 9 motor has a keyed 1.125″ shaft that needs to be connected to the shaft of the transmission. Looking at the clutch, I want to keep the springed system that it uses for dampening the shock. I designed an adapter that would allow me to bolt the inner part of the clutch plate to an adapter that would slip on the keyed shaft of the Warp 9 motor. The motor also has a threaded hole on the end that will allow me to bolt this adapter in place so it doesn’t slip off. I also wanted to eliminate the bell housing since doing so allowed me to drop 4 more batteries in, 2 on each side of the transmission.

Sketch of how it should go together

Sketch of how it should go together

Cross section sketch of the adapter

Cross section sketch of the adapter

Motor mount and clutch plate adapter

Motor mount and clutch plate adapter

clutch plate adapter - motor end

clutch plate adapter - motor end

The clutch plate adapter will allow the clutch plate with the removed friction plates to mount to the electric motor shaft.

This is a photo of the shaft with the clutch plate slid onto it.

This is the clutch plate with the unneeded material removed.