Synchronous Motor - Type

Type

There are two major types of synchronous motors: 'non-excited' and 'direct-current excited', which have no self-starting capability to reach synchronism without extra excitation means, such as electronic control or induction.

With recent advances in independent brushless excitation control of the rotor winding set that eliminates reliance on slip for operation, the 'brushless wound-rotor doubly fed electric machine' is the third type of synchronous motor with all the theoretical qualities of the synchronous motor and the wound-rotor doubly fed motor combined, such as power factor correction, highest power density, highest potential torque density, low cost electronic controller, highest efficiency, etc.

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