What to do w/ a C40-300 Magmotor & 4 Hawker 12v 13ah batts?

fechter said:
You can change the timing for operation in either direction (relatively easy).
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Excellent, that's what I was hoping to hear. :D

Yes, you will need a humongous rear sprocket to do a single reduction. It will be more reasonable to use a double reduction so the sprockets don't need to be so big. This usually means using a jack shaft of some sort.
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I agree single reduction is starting to look quite unpractical. The link I mentioned a few posts back: http://www.peltzer.net/ebike/index.html shows a guy with a less powerful motor then the magmotor but similar form factor and high RPM. He's gone through a number of revisions and ended up on a double reduction drive, first belt, then chain.
version 1.0
ebike03.jpg

version 1.3
ebike22.jpg

version 1.4
ebike44.jpg

version 1.5
ebike52.jpg
 
Ja, I dun seed the Peltzer rig long ago... (I wasn't that impressed, frankly). I am not sure if they are a member here. (req'd for any 40s)

The rim-pulley was popular in Asia before the advent of the hubbie... it has merit for high rpm motors like outrunners.

8)
 
I've been continuing to think about using this motor on an ebike. I've been trying to dig up info on people running the motor at 36-48v but there is very little out there, mostly robotics based. I've also posted the motor up on an aussie robotics forum to gauge interest, they suggest it may be worth $250AUD 2nd/3rd hand. If someone there really wants it, I may sell it and start looking at hub motor options.

One forum I read had a poster who said he ran the C40-300 at 36V 275A, that's 9.9kW :!: in a go-kart. I don't think I'd want to push much beyond ~5kW though.

The brushed speed controllers here: http://www.kellycontroller.com/mot/Brushed-Motor-Speed_Controller.html seem to be the best value I can find. Lots of good options in the $199-279 range.

Model Rated Voltage Voltage Range 1 Minute Current Continuous Current
KD24200 24V 8V-30V 200A 120A $169 Order
KD24300 24V 8V-30V 300A 160A $199 Order
KD24400 24V 8V-30V 400A 200A $239 Order
KD36200 36V 18V-42V 200A 120A $169 Order
KD36300 36V 18V-42V 300A 160A $199 Order
KD36400 36V 18V-42V 400A 200A $229 Order
KD48200 48V 18V-56V 200A 120A $199 Order
KD48300 48V 18V-56V 300A 160A $239 Order
KD48400 48V 18V-56V 400A 200A $279 Order
 
Here's a short laundry list of items I'd need to get this project going (if it does go ahead) and things to figure out. Just taking stock and scheming aloud:

Things to buy:
* controller (capable of 5kW continuous)
* twist grip speed control
* main contractor
* fuse
* wiring

Thinks to make:
* fabricate a mount to the bike (in a location similar to the photos posted earlier)
* figure out how to get a sprocket AND a brake on the rear wheel (I could mount a sprocket to the disk brake mounts on the hub, but would lose my rear brake. Additional, the position of the motor would probably prevent a rim brake from being used. Lastly, the rim is not rim brake compatible anyways)
* fabricate a double reduction drive with 1 stage belt driven 2nd stage chain driven.
* fabricate a battery mounting system (for the Hawkers to play around with, lifepo4 in the future perhaps?)

Things to do:
* test Hawker batteries
* decide on system voltage
* predict vehicle performance based on power output, energy storage, motor rpm, gearing, wheel size, rider+bike weight, aerodynamic drag

Things I'm forgetting:
:?:
 
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