Re: (ET) Reverse draws a lot of current: Why?

["Christopher Zach" <czach computer org>]

Sounds logical as I spent last weekend fiddling with the reversing relay to
get anything working. The pads were quite pitted.

Looks like the relay is shot at last. I'll put in for a replacement.

Chris

----- Original Message -----
From: "David Roden (Akron OH USA)" <roden ald net>
To: "Elec-trak" <elec-trak cosmos phy tufts edu>
Sent: Saturday, February 23, 2002 6:06 PM
Subject: Re: (ET) Reverse draws a lot of current: Why?


> On 23 Feb 2002 at 15:21, Christopher Zach wrote:
>
> > I backed up my driveway ... the power meter pegged ...
> >
> >  the motor
> > spins a lot faster in reverse than fwd at the same speed setting and
gear
> > with a lot less torque. Also it seems the current draw in reverse (esp
> > when you go to field weakening speed 1) is insanely high ...
>
> These are classic symptoms of low field current.  Check your reversing
> relay.  The contacts could be burned or pitted.
>
>
> David Roden - Akron, Ohio, USA
> 1991 Solectria Force 144vac
> 1991 Ford Escort Green/EV 128vdc
> 1970 GE Elec-trak E15 36vdc
> 1974 Avco New Idea 36vdc
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>