Re: Bad Boy "Plus" Opportunity Charger

["Mike Chancey" <evtinker@hotmail.com>]

Lee Hart <leeahart@earthlink.net>  answered my message:

> Mike Chancey wrote:
> > At 187 volts and 2 amps output, the AC ammeter was indicating about
> > 6.5 amps input. That works out to a power factor of about .47
>
> It might be even worse. Was the AC ammeter true rms?

I have been told since the ammeter is of the "moving metal" type it should
be true RMS.  Does this make sense?

<SNIP>

> To do better, add some inductance in series with the AC input. The
> secondary of your 24vac transformer can be used as an inductor (primary
> left open). Since you want voltage boost, then add a large (meaning
> 10-100uF) AC rated capacitor across the AC input of the bridge
> rectifier. As the inductor-capacitor combination approaches resonance,
> the output voltage gets higher, and the power factor gets better.

With this kind of arrangement would there be any advantage to using a
different transformer rating, or would the 24 volt unit still be
appropriate.

I knew I should have mounted that thing in a more accessible spot.  :^)

Thanks,

Mike Chancey,
'88 Civic EV
Kansas City, Missouri
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