mo-ta モーター

October 3, 2006

Can I use a Variable Frequency Driver (VFD) / Inverter to control the speed of the AC Motors?

Filed under: AC Gearmotors — mota @ 10:51 pm

Yes.  AC motors can be controlled via frequency.  The permissible frequency range is 10-80 Hz.  Only Three-phase, 230VAC motors can be used. 

Calculating the synchronous speed of the motor is accomplished with the following formula: Ns= 120*frequency / Number of poles. 

Limitations on maximum frequency include the permissible torque of the gearheads being able to handle high speeds, and the outside temperature of the motor not rising above 90 degrees.  Click this link for other technical information regarding AC gearmotors’ speed related issues.


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