crest logo banner adsolstice ad
site map
Main    Discussion Archives register comment
home
energy and environment
discussion groups
calendar
repp
gem
about us
employment
discussion groups
efficiency efficiency miropower micropower solar solar wind wind geothermal geo bioenergy bioenergy hydro hydro
Ev Archive for September 2000
1238 messages, last added Wed Aug 08 18:49:38 2001

[Date Index][Thread Index]

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