[ausev] Going in Reverse?

[Rob H]

I've wrote a post about clutchless if you have questions.  See RAVolt.com

According to EV America, the brush timing in an Advanced DC motor is
specifically setup for EVs to only go in 1 direction.  Reversing the motor
is a bad idea.  I won't restate that AC is different.

On Dec 20, 2007 7:39 AM, <kenscircus at aol.com> wrote:

> Hi John,
>
> With electric you don't "need" a clutch. That is because the motor
> doesn't idle, so the transmission input shaft is not spinning when you
> are stopped. You just stop and slip it in reverse. Just don't try to
> put it in reverse while in motion.
>
> It is also possible to reverse the motor, but if you have a manual
> transmission I would go with that. Reversing the motor requires
> reversing the field winding polarity. That is done with four
> contactors. The down side of that is extra high power parts and motor
> brush timing issues.
>
> Ken
>
>
> -----Original Message-----
> From: loopcat <loopcat at yahoo.com>
> To: ausev at austinev.org
> Sent: Wed, 19 Dec 2007 11:07 pm
> Subject: [ausev] Going in Reverse?
>
>
>
> Hello All,
> Here is a real newbie question for u. If I use a
> manual transmission without the clutch, how is it
> possible to shift to reverse? I have see some
> conversions that use a electric switch to control
> direction, Is the direction changed by the
> motor-controller?
>
> Thanks, John in SA
> PS Happy Holidays!
>
>
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-- 
Rob
____________
Rob Hirschfeld
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