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Re: (ET) testing charger

The capacitor and extra winding are there to regulate voltage, not power factor.
Are you testing the charger on a workbench, as in not connected to the batteries? Is so, the 39 volts could be OK... most digital meters give numbers a little different than what is listed in the book (written in the days of analog meters).
If you hook up the batteries, you may well see a higher voltage reading as it smooths things out.
Or for techie fun, hook up an oscilloscope as my brother did. The wave form is a bit unusual, and I suspect different meters may average this differently. 

Caps are here if needed:
http://electrictractorstore.com/index.php?main_page=product_info&products_id=61

http://electrictractorstore.com/index.php?main_page=product_info&products_id=62

'scope pics are here:
http://coate.org/tom/Elec-Trak/original_charger.html


On 11/16/10 3:18 PM, Chris Zach wrote:

On 11/16/2010 12:42 PM, Mike Finck wrote:

I have been testing my E-20 on-board charger, one of the instructions
for testing says voltage between wires #2 and #30 should be “about 45
volts.” I am getting 39, does that fall into the category of “about”?!
The other two suggested test points are right on the required voltage.


Sounds low. My E20's charger will finish out at 45.2 volts at about .2
to .3 amps into the pack. 39 would leave your pack undercharged.

My guess is the capacitor is bad; that helps to boost the final voltage,
makes the power factor better (if I recall) and helps the transformer
limit current when fully charged. Replacements are simple and cheap,
just check with Harold.

C

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