Electric Bicycle Transmission 1

[chrisyd]

I am trying to find out some info about drive systems for electric bikes. As part of my HNC project, i need to Research, design, and build the product.

i need info on the following;

Motors
Batteries
Transmissions
Speed Control

Can anyone please help???

 

[jbartos]

Suggestion: Visit

http://www.rhoadescar.com/17952.htm

https://www.bpstore.com/cgi-bin/ncommerce/;display/category?cgrfnbr=641&cgmenbr=27

http://www.electric-bikes.com

http://www.electric-bikes.com/others.htm

http://ebicycles.com

http://www.electricbikessys.com

http://www.electric-bicycle.co.il

http://www.electricvehiclesnw.com/

etc. for more info

 

[chrisyd]

thanks jbartos, these sites were very usefull. However if anyone knows of any other people who have done this project or similer, then please let me know. cheers all.

p.s any other web site addreses would be great. thanx again.

chrisyd

 

[chrisyd]

quick question

anyone know why people always use D.C motors in electric bike? whats wrong with A.C?

 

[jbartos]

Comment: DC motors are used because they:
1. Result in a lower part count
2. Have simpler speed control
3. Have lower overall weight
4. Occupy smaller overall space
5. Result in higher overall efficiency
6. Result in higher overall reliability
7. Etc.

 

[chrisyd]

does anyone know of any suitable speed control circuits for my project? i was hoping to make my own rather than buy one

 

[jbartos]

Suggestion: Resonant zero switched/crossed converters or motor drives tend to be very efficient. There are appearing on Web sites and in IEEE journals.