Single phase motors are fractional to small integer horsepower. You
will need VFD-rated motor windings, and make sure that you do not
overspeed the winding mechanism (so don't run the mechanism over 60
Hz, for example).
Small market, you are going damned slow anyway so why worry about
slower, the single phase inverter is at least 2x more expensive than
the three-phase version for the same motor power, control logic for
reversing the motor is orders of magnitude more complex, stuff like
I suggest you find a vendor that offers hoists with less than 5 hp
drive motors, and single phase power is probably an expensive option.
David A. Smith
Doesn't a speed controller limit the frequency to 60Hz, when connected
to a 60Hz main?
Even if the cost of a single phase motor is 2x that of a 3-phase
motor, we would like to get it. Are there any vendors who sell single
phase variable motors?
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