Lead foot driver causes Curtis 1221C to complain

[Roger Daisley <roger@daisley.com>]

I recently acquired a VoltsRabbit running a Curtis 1221C, Prestolite motor
and 128-volts of flooded batteries.

On warm Southern California days, after about 5-6 miles, the controller will
abruptly cut back on current flow and start to squeal at certain throttle
positions.  I assume its overheating.  The controller and aluminum plate
it's mounted on (Electro Automotive design) is quite hot to the touch.  I
don't drive it very conservatively, as all my trips are short range.  Amp
pulls in the 200-300 range are common.  (Yes, I know: The cheapest is to get
off the throttle, but that's not what I want to do. <smile>)

Ideas that cross my mind are:

Find a way for more air flow across the assy, but that seems problematic as
to "fixing" the problem.

Add cooling area or increased heat sink.

Some method of extracting the heat from the controller.

Slow down. REJECTED <smile>

With the combined expertise on this board, surely someone has encountered
the problem and solved it.

HELP ....

Roger Daisley
Laguna Hills, CA

"Where Revolutionary New Ideas Are Not Always New or Revolutionary"