Patent ID: 9397603
Filing Date: 2016-07-19
CPC Classification: H02P

Claim Text:
1. An electric motor comprising: a first conductive winding coupled to an AC source, and configured to generate a first magnetic field in response to being energized by the AC source; a second conductive winding configured to be selectively energized by the AC source via one or more switches, wherein the second conductive winding is arranged so as to generate a second magnetic field superimposed with the first magnetic field in response to being energized by the AC source; a rotor configured to magnetically interact with the first magnetic field, or the superimposed first magnetic field and second magnetic field, such that a torque is applied on the rotor; and a controller configured to: (i) obtain a measurement of a voltage of the AC source; (ii) make a determination, based on the obtained measurement, whether to energize the second conductive winding; and (iii) if the determination is made to energize the second conductive winding, cause the one or more switches to operate such that the second conductive winding is coupled to the AC source, or rather, if the determination is made to not energize the second conductive winding, cause the one or more switches to operate such that the second conductive winding is not coupled to the AC source.