David Roden (Akron OH USA) wrote:
>
> On 7 Oct 2002 at 19:58, Patchem, Eric EM2 wrote:
>
> > Most of the Industrial
> > chargers I have worked on (up to 96 volts) all had some form of isolation
> > device.
>
> Some EV hobbyists would rather put their money into tire-burning batteries,
> controllers, and motors than into safely isolated chargers.
>
> There are several people on this list who call me an alarmist, and they may
> be right. But I'm concerned that every non-isolated charger installed in an
> EV increases the risk of a tragic event, like the electrocution of a young
> child.
>
> If that were to happen, apart from the awful nature of the death, it would
> be a significant setback for EVs in general. It would be one more point for
> the anti-EV lobby to use in building fear of EVs -- how many of us have had
> people ask "Don't you get shocked when it rains?". Such an event could
> easily result in legislation negatively affecting hobbyist EVs, at least in
> some areas.
>
> For the sake of everyone's safety, including your own: if you elect to use a
> nonisolated charger, such as a BC-20 or one of Rich's high-power PFC models,
> please add an isolation transformer. Or wait until Rich develops an
> isolated model.
>
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> 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 rider 36vdc
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Isolate the Damn CAR!!
It's easier, and cheaper and should be done anyways with more than 96
volts of battery on board.
Do the car right.... and the charger is a NON issue.
Adding in a Neg side contactor to your Motor negative is all you have to
do on most EVs to keep the motor from becoming the ground fault.
--
Rich Rudman
Manzanita Micro
www.manzanitamicro.com
1-360-297-7383,Cell 1-360-620-6266
