Patent ID: 9502930
Filing Date: 2016-11-22
CPC Classification: H02K

Claim Text:
1. A motor rotor, comprising an iron core and a permanent magnet arranged inside the iron core, wherein, multiple groups of mounting grooves are arranged in the iron core along a circumferential direction of the iron core; multiple groups of permanent magnets are provided, and permanent magnets in each group of permanent magnets are correspondingly embedded into corresponding mounting grooves in each group of mounting grooves; an oval-shaped region is provided between the outmost layer of the mounting grooves and a periphery of the iron core, the oval-shaped region has a reinforcing hole, a reinforcing rod is arranged inside the reinforcing hole, and end portions of the reinforcing rod are connected via a reinforcing member; and in an inward direction from the periphery of the iron core, a distance L between an edge of each mounting groove in each group of mounting grooves and the periphery of the iron core increases gradually; each group of mounting grooves comprises three or more than three mounting grooves arranged at intervals in the radial direction of the iron core; and in an outward direction from a center of the iron core, distances between edges of three mounting grooves, starting from the mounting groove closest to the center of the iron core, and the periphery of the iron core are respectively Lc, Lb and La, wherein, 2Lb≧Lc≧1.2Lb, and 2La≧Lb≧1.1La.