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.
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- 32 posts total
- 32 posts total