Thursday, February 6, 2014

could there be a pedal charge electric Mountain bike Front wheel motor Back wheel generator Seat back Battery?




justbill


maybe your range would be what you want always so long as your not tired or is the pedaling going to be a lot of work You could have bike gears and shift down but that would cut power huh? have they ever tried to make one of these in scooter or mountain bike


Answer
Yes
http://www.greenspeed.us/bionx_motor_bike_kit.htm


Some motors can be used as a generator, and in such a case gererator mode will increase the effort required to pedal the bike. You can also use this added resistance as a mean of braking, this is called regenerative braking where energy used to slow the bike is converted to electricity to recharge the battery. Problem is that these braking periods are a small fraction of the way a bike is driven there would not be much recharging happening. Because of this it would most likely not be worth the expense to have regenerative braking on a bicycle. You would do much better to just recharge the batteries in a more traditional fashion from a power source. If you wanted to be green about it then use a solar panel to recharge an alternate set of batteries and swap battery packs.


Edit:

BTW in the above link you can mount that wheel motor on either the front or rear wheel Rear wheel mounting requires adding afree wheell gear pack. Most installations I have seen add a rear wheel mount motor. I once saw a chain saw engine retro'ed onto a bikes rear wheel via a secondary chain and sprocket.

electric bikes?




free_mark5


Anyone have a electric bike, i want one that looks like a mt. bike, and can also be used without the power on.


Answer
you have several options.

Giant will be coming out with a new model this spring, check out your Giant Ebike Dealer, or
Bird Ebike in Colorado if you don't have one.

Next is the Bionx ebike add on kit, can be added to most bikes.

Also Crystalyte hub motors can be added to most Mountain bikes.

Buy from a good dealer, locally if you can.

we have several ebikes including Giant bionx, Crystalyte and others.

Your best choice will depend on quite a few factors. but first make sure where they are legal in your locality. State of NY doesn't like them.

Legal electric assist Ebikes are generally considered bicycles if they comply with the federal law HR727- Max 750watts, pedals that work, maximum 3 wheels, maximum 20mph under power. but there are exceptions so check locally.

Check http://tech.groups.yahoo.com/group/power-assist/
for more details




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