Patent ID: 11955919
Assignee: DENSO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electric motor system comprising:
a stator core body portion enclosing a rotor;
a plurality of teeth arranged in a circular manner and respectively projecting toward the rotor from a wall surface of the stator core body portion;
a concentrated winding stator coil which includes plural-phase windings and in which the windings are arranged at teeth defined for the respective windings among a plurality of the teeth;
an inverter to which respective first ends of the plural-phase windings are connected and which applies a current for generating rotating fluxes around the rotor to the plural-phase windings; and
a zero-phase switching arm to which respective second ends of the plural-phase windings are commonly connected, and which adjusts a zero-phase current flowing through a common connection point of the plural-phase windings and generates torque at the rotor using the zero-phase current,
wherein the zero-phase switching arm is configured to adjust the zero-phase current by switching control, to directions of zero-phase magnetic fluxes becoming opposite in response to a magnetic pole of the rotor rotating from a position of a first tooth to a position of a second tooth, which is adjacent to the first tooth.