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| Ev Archive for September 2000 |
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| 1238 messages, last added Wed Aug 08 18:49:38 2001 |
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Re: Ideas for the new EVer
As a newbie who is thinking about doing a conversion, I love reading these
types of posts. Is there a FAQ, or one place that all these types of
information is kept?
Thanks
Lane
Lee Hart wrote:
> In some off-list correspondence with a new EV owner, I described some
> things that new EVers tend to do wrong, and some simple indicators to
> prevent damage. Without these indicators, people don't know they are
> doing anything wrong (until it's too late!). They have all been
> mentioned before, but maybe others would like to see it as well.
>
> 1. Don't drive until the batteries are so dead that it barely moves.
>
> <a big snip>
> 6. Don't roll backwards with the car in a forward gear (or vice versa).
> Series motors become series generators if they are turned backwards.
> Most controllers are not protected against the huge currents they can
> generate. Nothing happens at first, but as the motor gains speed, it
> reaches a threshold where the generated voltage exceeds the forward
> voltage drop of the freewheel diode in the controller, and BANG! It's as
> if you slammed on the brakes. The current surge can kill the controller.
> --
> Lee A. Hart Ring the bells that still can ring
> 814 8th Ave. N. Forget your perfect offering
> Sartell, MN 56377 USA There is a crack in everything
> leeahart_at_earthlink.net That's how the light gets in - Leonard Cohen
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