For Basis TT owners does the VPI SDS work?

A bit of clarification: The basis motor is two-phase. Not three-phase.

It uses a phase splitting cap as most all two-phase AC synchronous motors do if powered directly off single phase AC from the wall or something like a Walker or SDS.

One of the benefits of the Synchro-Wave controller is as I stated above.

The owner of basis uses the name A.J. Conti.

I hope this helps and clears up some inconsistencies.

Dre

Dre J, you are right on all counts. Sorry, about the sloppiness.

How much of a benefit is a power supply that does not eliminate the phase splitting cap in the motor, and instead, supply two separate phases to the motor?

The Basis approach, which involves modifying the motor and eliminating the phase splitting cap, make much more sense to me.

Also, how would the other power supplies work for changing speed? Since the motor is a synchonous motor, that would mean it generates a different frequency ac power for 45 rpm. Wouldn't the ideal phase splitting capacitor be different for the different frequency of ac being supplied?

A single-phase AC controller would still work to control speed of a synchronous motor. Proof of that is the fact that the Walker and SDS controllers do work with all such motors. But you are correct that a controller that could supply two sine waves that were 90 degrees out of phase would be more ideal in terms of noise reduction (and cogging, I think). The Basis unit looks nifty but it costs quite a bit. I see where Allnic has a tube-based controller, also very expensive.

Lewm,

Yes, one can generate a different AC frequency to drive the motor at a higher speed. But, what I am wondering is whether a capacitor "tuned" to 60Hz can effectively create the 90 degree offset phase. If not, the owner would be better off using the controller at the 33.33 rpm speed setting while moving the belt on the pully to achieve 45 rpm.