Patent ID: 11870377
Assignee: QUANTENTECH LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method comprising:
configuring a motor drive system with a motor and an inverter, wherein:
the motor has a stator, a rotor and a plurality of symmetric windings arranged into a plurality of winding groups; and
the inverter has a plurality of power converter groups, and wherein each power converter group is configured to control currents of a winding group;

injecting a plurality of high-order synchronous harmonic currents into the plurality of windings of the motor;
configuring the system such that the high-order synchronous harmonics currents generate a rotating magnetic field at the same speed and in the same direction as a magnetic field generated by fundamental currents of the plurality of windings; and
in response to an increased phase number, a reduced pole number and a corresponding saturation region change from a tooth area to a yoke area, adjusting a phase-shift of one of the high-order synchronous harmonic currents to reduce a magnetic saturation of the yoke area in the motor and enhance a torque of the motor in an operation mode.