i

You might view this as a good time to experiment with a different method
of spinning an idler.
A "new in the box" electrolytic capacitor will cost about $15. That'll
buy you a 250 mic capacitor that'll spin-up a good 7 1/2 HP idler in less
than a second.

Jerry




"Ignoramus9179" wrote in message
.. .
On 16 Aug 2005 02:10:55 -0400, DoN. Nichols wrote:
In article ,
Ignoramus9179 wrote:
I built a self starting phase converter with a 10 HP idler and two 92
mF capacitors. It works great and starts in under 2 seconds.

I also have a very similar looking Century 7.5HP motor. They 10 HP and
7.5 HP look similar.

This 7.5 HP motor would NOT spin up from two other capacitors. If I
wire it with three capacitors (I have 5 total, 2 already used in the
main phase converter), it would spin up, but it takes it about 5
seconds to do so and it warms up appreciably. What gives?

What is the RPM of the idler which you are using, and the motor
which you are *trying* to use? You may need a different capacitance for
a different RPM motor.

both my current 10 hp idler and 7.5 hp idler are 1750 or so rpm.

Another tidbit is that the 7.5 HP motor starts just fine from 3 phase
output of my phase converter. I do not think that it is a bad
motor. Maybe some caps out of these three are in bad condition.

Or -- you just may need more of them.

could be, but why can I get with 2 caps for my 10 HP RPC?

i