Electric Bikes - dc motors

I want to get a direct current motor and connect it directly to a battery, with a simple on/off switch. can anyone tell me how to do this? motor and battery recommendations would also be welcome. I'm in southern ontario, so if you know of any local distributors that would help. thanks

I have a Chopper setup that way, the best advise is don't do it go with a speed controller.
Reasons being, the brutal torque that is put on everthing at startup is prone to damage mounts etc. (throttle setups have soft start), you need 2 switches as if 1 welds on (it will happen) you can turn the motor off, you need to make sure you don't go on and off to many times close together as the heat from the spark will melt the relay/switch, either the copper or the housing on it.

Google TNC scooters lots of cheap motors and controllers, the Unite ones are good and if you get one with built in gearing it makes you job a whole lot easier.

I've got to agree. Lack of controlled output will really limit the usefulness of the bike, and there will be annoyances with keeping your parts in check.

I want to get a direct current motor and connect it directly to a battery, with a simple on/off switch. can anyone tell me how to do this? motor and battery recommendations would also be welcome. I'm in southern ontario, so if you know of any local distributors that would help. thanks



here

http://motorsportcraze.org/store/index.php?main_page=index

http://www.mopeds.ca/

to name a few for cheap parts ;)

cheers

thanks for the replies, I'll get a controller

Yes...imagine if you had a car that had no adjustable carbuerator?

Yes...imagine if you had a car that had no adjustable carbuerator?

My dad told a story about as a teenager he was driving a Model A truck when something happened to the carburetor. He took the carb off, tied the fuel line across the intake manifold and drove it home using the ignititon key switch to govern the engine speed. It can be done, but you ain't gonna have much control.

Good choice with the controller!

I want to get a direct current motor and connect it directly to a battery, with a simple on/off switch. can anyone tell me how to do this?

Good points on why to "go controller" :)

But if your desire is only to go cheap/low-tech, ya might consider running a battery *pack* where your "simple on/off switch" is is replaced by something like an A-B-C-D switch, which starts out only w/2-3batteries, then series in more batts (volts) as you go from A to D where D is all batts in series...

EVen a simple A-B switch might "get you there", if the pack is split and you are switching each 1/2 from in parallel to in series...

If you can't find a switch that can handle full pack volts (*amps*!), then it gets more complicated, where the A-B-etc switch controls contactors (relays) that can handle the voltages...

There are lots of schemes out there for series/parallel packs and contactor controllers. Very old school, but how things were done once - when half the motorized vehicles in the world were EVs.

motor and battery recommendations would also be welcome.

Like any vehicle. Depends on your needs. SUV or sports car? Are you (do you feel :D ) limited by legislation in any way?

I'm in southern ontario, so if you know of any local distributors that would help. thanks

So you are comfortable and competent with bikes and tools and electrics? Not looking at finished vehicles?

tks

LocK
human-electric hybrid
Living Better Electrically in Toronto