Motor and rotor thereof

A motor comprising a motor rotor, wherein the motor rotor comprises an iron core and a permanent magnet arranged inside the iron core, wherein,

• a plurality of fps of mounting grooves are arranged in the iron core along a circumferential direction of the iron core, and each group of mounting grooves comprises two or more than two mounting grooves arranged at intervals in a radial direction of the iron core;
• a plurality of 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;
• on a cross section, perpendicular to an axial direction of the iron core, of the permanent magnet, a length L of the permanent magnet is a distance between two endpoints of a side, away from a center of the iron core, of the permanent magnet, and a width H of the permanent magnet is a distance from a midpoint of a connecting line connecting the two endpoints of the side, away from the center of the iron core, of the permanent magnet to a midpoint of a side, close to the center of the iron core, of the permanent magnet, and
• H
• L
• ≥
• 1
• 10