INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

diy electric motorcycle with golf cart motors

diy electric motorcycle with golf cart motors

(OP)
I've been researching this lately (.01$ per mile fuel cost, 2500$ diy cost).
The off the shelf kits are around $2500 plus batteries. They typically are 10 to 15 hp 48v electric motors. Golf cart motors are typically 3 hp 36v to 48v.
I've been wondering if it'd be possible to speed control about 4 or 5 golf cart motors in a serpentine belt configuration as a drive.?? (possibly adding a 3 spd transmission also?)

(vw beetle takes 15hp to maintain 55mph, but 40 hp to get there...)

anyhelp appreciated.
Mike

Murphys law 28th corollary- If there are five ways for something to go wrong, and you circumvent all five, a sixth will promptly develop.
Kwazai's addition- if you circumvent the sixth a seventh will develop, etc. etc.

RE: diy electric motorcycle with golf cart motors

Build it with one motor first.

Mike Halloran
Pembroke Pines, FL, USA

RE: diy electric motorcycle with golf cart motors

10-15 hp motors are off the shelf available - not sure costs.  But as MH noted - try it with one motor first - you will have enough problems getting everything lined up and working correctly.  Multiple motors will just exponentially exaggerated your problems!!

RE: diy electric motorcycle with golf cart motors

The quick answer is yes, you could use more than one motor to drive it.

However you may find all sorts of electrical nasties when you do so, to the extent of needing separate motorr controllers for each one.  

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies  http://eng-tips.com/market.cfm?

RE: diy electric motorcycle with golf cart motors

If your a real masochist put one on each wheel and use individual speed controls to steer it.

Old Beetles don't really have 40hp. More like 25 actually.  

Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
 

RE: diy electric motorcycle with golf cart motors

(OP)
I had just wondered if four 36v motors could be run in series with a single controller (dc motor controller and 500k ohm pot).
I had envisioned attaching a small trailer with a dozen car batteries and a charger in it.

Electric forklifts are more expensive than the golf carts are.
 

Murphys law 28th corollary- If there are five ways for something to go wrong, and you circumvent all five, a sixth will promptly develop.
Kwazai's addition- if you circumvent the sixth a seventh will develop, etc. etc.

RE: diy electric motorcycle with golf cart motors

As I said you may run into electrical nasties. Chances are you won't, in my opinion, but it isn't my money that will be turning into smoke.

I'm guessing you are using brush type DC motors? Best bet would be to ask the vendor of your motor controller.

Simplistically you won't save much money as the big bucks is the output stage transistors.

 

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies  http://eng-tips.com/market.cfm?

RE: diy electric motorcycle with golf cart motors

KISS - keep it simple stupid or if talking to your wife - Keep it simple sweetheart..

RE: diy electric motorcycle with golf cart motors

A motorcycle, with how much battery weight???

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

RE: diy electric motorcycle with golf cart motors

(OP)
http://www.instructables.com/id/How-to-build-a-96-Volt-Electric-Motorcycle/step4/Where-to-put-those-batteries/

looks like eight -12volt for 96volt.
instructable shows 15-20miles, top speed around 70mph.
some of the others use off the shelf motors, some recycle electric forklifts.

more batteries-more miles. maybe a motorcycle camper trailer or three wheeler
For longer distances hook up a trailer- I'd seen the idea with an DIY-EV (aussie pinto I think -on Feildlines (otherpower.com))

what I know of auto design is that the bulk of the power usage would be in accelerating. most of what I read said heat from the current is the killer on the EVs. (higher voltages and or less motor(s)).

I wasn't sure if I could just use a transistor/diode between each smaller motor (arranged in series, serpentine belt) with a single controller. EFI injector power transistors maybe. not really my area.

Murphys law 28th corollary- If there are five ways for something to go wrong, and you circumvent all five, a sixth will promptly develop.
Kwazai's addition- if you circumvent the sixth a seventh will develop, etc. etc.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close