The stator is identical to that of a conventional AC induction motor.

 

The outer rotor is NOT mechanically coupled to the motor shaft.  Rather it rotates around the inner rotor on a set of additional bearings.  The outer rotor is of squirrel cage design. It has both induction type rotor bars on its outer surface and rare earth magnets on its inner surface.  The outer rotor acts like a magnetic torque converter transferring the rotating magnetic flux of the stator smoothly to the inner rotor.

 

The inner rotor IS mechanically coupled to the motor shaft.  Its design and slot cuts cause it to operate in a similar manner to that of a synchronous reluctance motor.

 

On start-up, the outer rotor initially functions as if an induction motor and very quickly reaches full speed.   The inner rotor then smoothly follows the outer rotor up to speed and synchronizes with the line frequency.   

 

Depending on the characteristics of the driven load, the time for the inner rotor to synchronize ranges from a couple tenths of a second to several seconds.

 

Similar in construction to a traditional induction motor, MGT's Hybrid motor offers the user a robust ultra-efficient and cost-effective motor solution for a wide range of industrial and commercial applications.   Its unique design, ultra-efficiency, and ability to operate with or without an inverter places the revolutionary Hybrid motor technology in a class all its own. 

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