Re: [CAD_CAM_EDM_DRO] Strange motor - question

wanliker@... wrote:

>
> There are some small motors with two windings connected in series used as
> control,reversable motors. There is a capacitor connected between the two
> ends of the windings. The power is applied to the centertap, and one end
> connection, and the morot will run one direction. If the power is applied to
> the other end connection, it will run the opposite direction. I missed the
> start of this thread, is there a possibility that this is what you have
> instead of a three phase?

Hi Bill, even though there is only a partial nameplate, it clearly
states 60 cycle, 3 phase. I think I've found out that it is 120 vac
rather than 230 vac, however. That explains the error messages on
the SJ100 VFD. I call up a fellow at Fincor and found that their
VFDs can be teased into putting out 120 vac 3 phase by going to
constant torque mode of operation. There you set the max frequency
at 120 instead of 60 hz and have the motor operate at 50%. Since I
don't have a Fincor, I'm not sure what that means. I'm looking into
reprogramming my SJ100 to operate in constant torque mode, etc. etc.
to see what happens.

JerryK