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Quad bike EV

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RobW View Drop Down
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Joined: 30 March 2016
Location: Uralla NSW
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    Posted: 06 April 2016 at 1:12pm
Hi There

I am considering modification of an old Yamaha 250cc quad bike to EV.

I have a neurological condition which makes my right foot useless on the quad bike foot brake, so I want to construct a unit which slows down maximally when I ease off the throttle. Am I right in thinking that an AC system with regenerative braking would be my best option?

I would welcome advice on regenerative braking, particularly at slow speed appropriate to travelling at under 10 kph over rough paddocks. Would I be right in thinking that braking will be more effective at higher speeds? Will it be effective at very low speeds?

I am considering the Motenergy ME1117 motor and Sevcon controller.

Advice welcome

thanks

Rob

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jonescg View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jonescg Quote  Post ReplyReply Direct Link To This Post Posted: 06 April 2016 at 7:51pm
Yes, AC will be the way to go here. What power does the bike currently make? A Motenergy dual stator motor should be good for 15 kW all day long, and 30 kW peak (40 hp). No doubt plenty for a quad.

AC will allow you to enjoy regenerative braking as you throttle off with a few simple settings on the controller. You can set the maximum regen torque to anything you like, but as a general rule on motorcycles, about 10% of peak forward torque is heaps.

Get in touch with Geoff O'Toole from GT Tooling - he's based in Sydney but has built some electric quads before.
I challenge you to come up with a better invention than the bicycle
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