Rotor core, rotor assembly and motor

• Main Authors: MING XIJUN, DUAN SHIYING, LIU HAIYANG, WEI HAIYANG, ZHENG JUN
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2024
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

The utility model discloses a rotor iron core, a rotor assembly and a motor, the rotor iron core comprises an annular part provided with a central shaft hole and a plurality of fan-shaped iron core parts protruding from the circumferential side of the annular part, a magnetic steel groove used for installing magnetic steel is defined between every two adjacent fan-shaped iron core parts, the fan-shaped iron core parts are connected to the annular part through a plurality of inner magnetic bridges, and a plurality of stress release holes which are distributed in the circumferential direction and correspond to the plurality of magnetic steel grooves are formed in the annular part; wherein a central angle corresponding to two opposite side edges of each stress release hole along the circumferential direction of the rotor core is beta, a central angle corresponding to two inner magnetic bridges on two sides of each magnetic steel groove along the circumferential direction of the rotor core is alpha, and beta is g