Mark Dodrill wrote:
>
> >> 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.
> >>
>
> >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, could you give more details for us less educated EV people (like me)
> on exactly what this would mean, and what needs to be done?
>
> Thanks.
>
> Mark Dodrill
Sure
Have a Negative side contactor that opens when you are on charge.
The rest of the high voltage pack simply need to never touch the
chassis. DC/DC isolate your 12 volts from Chassis. Un less of course
it's your 12 volt rail and that's feed be a 300 watt Plus converter.
You want your pack to pass GFI. Less than 5 Ma of leakage to earth
while charging.
Basicly nothing touches the Motive pack voltage while on charge that is
NOT isolated by a Dc/Dc converter. Then keep fingers and hands off the
hot stuff, and under covers and finger gards.
This whole question is trivial IF you have clean batteries, and take
care of the cables.
It's a real effort if you have gassing acid weeping Flooded lead acids.
Having this issue not solved also breaks meters, controllers and
chargers.
--
Rich Rudman
Manzanita Micro
www.manzanitamicro.com
1-360-297-7383,Cell 1-360-620-6266
