I don't like it in the high-speed tap. I've run the 277 volt motor for over a week at very low speed in the medium speed tap. Works great. Smooth, quiet and cool.
Suggestion: So long as you are modulating the motor's speed, you don't need a three speed motor. You could have the motor manufacturer build a single-speed motor that is full of copper and iron. Much higher efficiency ball bearing motor. Better operation. Etc. My suggestion: is to contact the specialty motor division of Baldor Electric. The building will probably fall down before the motor dies.
Hope this helps,
Best regards,
Dick Peters, P.E./CM
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