2026-04-14T08:41:22Z Will O'Brien willo@biobug.org Copyright 2026, Will O'Brien SPHPBLOG I think I'm going to settle for putting it back together and picking up a spare set of brushes sometime.

Otherwise, the project has been on hold while I finished up my CNC build. I'm planning to make a custom mounting plate for the motor once it's done. I'm still pondering the donor bike. I figure that it'll cost about $400 minimum to get it road worthy. It needs tires, brake service and some of the handlebar controls are missing. Then there's the title issue. I think it'll be cheaper to make a new frame and steal some parts - or just buy an inexpensive road worthy bike. It would definitely reduce the frustration factor.]]> http://biobug.org/ev-motorcycle/blog/index.php?entry=entry070424-162500 2007-04-24T00:00:00Z 2007-04-24T00:00:00Z motor came today! I'm dressed up for some work visitors so I didn't get into it during lunch. I'll put up more info as I tear into it.]]> http://biobug.org/ev-motorcycle/blog/index.php?entry=entry061115-211415 2006-11-15T00:00:00Z 2006-11-15T00:00:00Z
Since I'm saving on the motor, I'm hoping to swing a mill sometime soon...]]> http://biobug.org/ev-motorcycle/blog/index.php?entry=entry061109-192732 2006-11-09T00:00:00Z 2006-11-09T00:00:00Z http://autos.groups.yahoo.com/group/BB600/]]> http://biobug.org/ev-motorcycle/blog/index.php?entry=entry061106-223720 2006-11-06T00:00:00Z 2006-11-06T00:00:00Z http://biobug.org/ev-motorcycle/blog/index.php?entry=entry061106-222826 2006-11-06T00:00:00Z 2006-11-06T00:00:00Z The reason? voltage. The problem? A single IGBT is something like $250/ea
For the motorcycle, 48-72 volts is acceptable. This means that we can use MOSFETs to do the power switching.
Over 80 volts or so, the on resistance goes up - meaning power is wasted, and heat is generated. Low on resistance = cool running.

For my bike, I'm planning to build my own controller. There's a simple mosfet design available on http://austinev.org/evalbum. I snagged a copy and put it at http://biobug.org/ev-motorcycle/controller/circuits/

It's intended for 24-48v and 200-400amps. That's based on the IRF1010. The IRF1010 is rated at 60v, 60A, 130W power dissipation and .011Ohm on resistance. ($1.27 or so at mouser) 4x = 240Amp

I dug around and came up with the Fairchild HUF75545P3. It's rated for 80v, 75A, 270W PD with .01Ohm on resistance. With these fets, it should be god for a 72V system. Not bad eh? ($3.29/ea at mouser)
4x = 300Amp, 6x = 450Amp.]]> http://biobug.org/ev-motorcycle/blog/index.php?entry=entry061027-214942 2006-10-27T00:00:00Z 2006-10-27T00:00:00Z I ran across http://hitorqueelectric.com/ when I was checking out the white zombie ev racer. Frank of hitorque built some nice stuff. I think that I'm going to have him make me up an Advanced DC 6.7" motor. More on that later.

I found a great resource tonight.
http://www.seattleeva.org/

I've also decided that I'm going to build a model version to test with. (Think Back to the Future) I'm going to use it to develop my pwm throttle controller. A seperate module will house the mosfet pack. As the development progresses, I'll will publish the design - full source, schematics, etc. It should be fairly embarassing.

For some reason, the EV community is bad at publishing controller designs. A scanned in low res image just doesn't do it for me.]]> http://biobug.org/ev-motorcycle/blog/index.php?entry=entry061027-051620 2006-10-27T00:00:00Z 2006-10-27T00:00:00Z
If I do all the work to get it restored, I'll never do the EV conversion. Looks like I'll be selling off the extra parts.]]> http://biobug.org/ev-motorcycle/blog/index.php?entry=entry061026-215224 2006-10-26T00:00:00Z 2006-10-26T00:00:00Z ITS Titles to get it fixed. I used to deal in older cars, so I know it's the easiest way to get things fixed up.]]> http://biobug.org/ev-motorcycle/blog/index.php?entry=entry061024-163557 2006-10-24T00:00:00Z 2006-10-24T00:00:00Z
I got the bike on sunday! It's pretty complete, but in dire need of restoration. The brakes haven't been used in a looooong time. It has front and rear discs, so I get to deal with two hydraulic systems.

The motor has good compression, so I'm going to restore the rest of the bike and get it running before starting the conversion. My time is pretty limited for a while, so it's a good compromise. It's also far, far easier to get it licensed and inspected with the original hardware.

For now I'll post updates as they come along.]]> http://biobug.org/ev-motorcycle/blog/index.php?entry=entry061023-161527 2006-10-23T00:00:00Z 2006-10-23T00:00:00Z