The rotating electric motor includes a stator including a stator coil and a stator core, and a rotor located at an inner peripheral side of the stator core and rotatable relative to the stator. The rotor includes a rotor core provided at an outer periphery of a rotor rotation shaft via a core support portion. The rotor core has a plurality of magnetic poles in which a plurality of sets of permanent magnets are provided along a circumferential direction. The rotor core includes a plurality of rotor core divided bodies that are aligned in an axial direction, concentrically arranged, and shifted in phase from each other by a determined angle. A pair of grooves are provided on an outer peripheral portion of each rotor core divided body to be spaced apart from each other in the circumferential direction with a center of each magnetic pole.
Skewed rotor cores with grooves for reducing cogging torque
2019-10-01
Patent
Electronic Resource
English