AC vector motor systems

<variable speed ac motor>

All motors vary their speed, depending on the nature of the incoming supply and the load connected to them.

Of course, the motor mechanical and electrical construction shall be checked against rated voltage and frequency deviations.

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MSJ

I think you are looking for information on Variable Frequency Drives. These act similarly as DC Control with full variable speed. If you are looking for something like fan or pump drive controls, contact Allen Bradley at their website which will give you full product information, etc., or if you are looking for hoist motor drive control (NEMA D) then contact Electromotive Systems. These are both highly credible manufacturers and are willing to offer as much engineering and product assistance you may need.

Have fun !!!