Ray's EV Motorcycle Schematic · 19 June 07

Ray passed along a schematic for his Electric Motorcycle a while back and it has been rotting in my in-box ever since. Sorry about that Ray. Click the image for a larger version of the schematic.

Looking it over the top section seems to be the safety cut-offs, although we either have an extra wire or are missing a part as it seems to be shorted across the DC-DC when the switches are engaged. Most likely the wiring is such that the Alltrax controller doesn’t get it’s 12vdc enable signal until the key is on, kickstand up, and the twist grip safety switch engaged.

He’s using a variable resistance twist grip to set the controller’s speed. On the other side of the controller is his “high” voltage section (48 volts) with a couple safety items: fuse to the motor and a circuit breaker from the battery pack. If he hasn’t already I’d also suggest a fuse on the inputs to the DC-DC, unless the DC-DC has a fused input.

Also, way back in April, Ray sent along the following photo of his bike being assembled. This gives you a good view of the Alltrax controller (blue box in upper right), powersonic sealed lead acid batteries, and the motor with mount.

Thanks for the update Ray and sorry for being so tardy in posting it. If you have EV pics, schematics, and even a story or two you’d like to share be sure to drop me an email. I’ll try to be a little quicker in getting it posted here, especially once our baby starts sleeping more than 2 hours at a stretch!