Author Topic: Trike with 2 hub motors  (Read 5833 times)

Offline kjw_01

  • New Member
  • *
  • Posts: 2
Trike with 2 hub motors
« on: May 21, 2009, 12:45:39 PM »
I'm looking to convert a IC engined trike (presently 6kW) to a full EV. The plan is to use 2 hub motors (probably MW16C).

Am I correct in believing I'll need two controllers (HPC100B). Secondly, will I need some form of speed comparator/compensator to ensure the wheels are rotating at the same speed to prevent the vehicle moving in an arc.

I'm a bit new to this game so would appreciate any advice/comments.

Thanks

Offline e-lmer

  • Technical Officer
  • Master of Magic
  • ******
  • Posts: 458
    • My page
Re: Trike with 2 hub motors
« Reply #1 on: May 25, 2009, 05:01:57 AM »

You will definitely need two speed controlers, and some
way to link two throttle controls together as well.

The motors don't have to be driven exactly in sync.
If one doesnt push as much as the other, the underpowered
wheel will just draw less current.

I suppose some kind of computer controller could sense
the current in each wheel and adjust the throttle relationship
to keep them equal.  This would be particularly helpful when
turning under power.

Does anyone have specs for the throttle controller?


Offline kjw_01

  • New Member
  • *
  • Posts: 2
Re: Trike with 2 hub motors
« Reply #2 on: May 27, 2009, 09:30:35 AM »
Thanks e-lmer.

I think I've seen a few prototype controllers that can drive two motors with a single throttle input, but nothing that's in production.

Does anyone have any more technical information on the MW16C -- High Power Motor (Brushless/Gearless) motors e.g. stall torque, starting current, motor torque constant etc?

Offline Perbear

  • Technical Officer
  • Magic Undergrad
  • ******
  • Posts: 99
Re: Trike with 2 hub motors
« Reply #3 on: May 27, 2009, 04:40:27 PM »
RC controllers have something called governor function, maybe that could be used to syncronize two ESC?