Iron core structure, rotor component and permanent magnet motor

Abstract

The present invention provides an iron core structure, a rotor component and a permanent magnet motor. The iron core structure comprises an iron core body, multiple groups of magnetic steel grooves which are uniformly distributed along the circumferential direction of the iron core body and are used for accommodating permanent magnets, multiple groups of first magnetic isolation holes which are arranged at the end parts of the magnetic steel grooves facing the end part of the outer circumference of the iron core body, and multiple groups of second magnetic isolation holes which are adjacent to the first magnetic isolation holes and are between the magnetic steel grooves and the outer circumference of the iron core body far from the axial hole side of the iron core body, wherein the second magnetic isolation holes are approximate triangles, and one corner of each of the approximate triangles face the axial hole. According to the scheme of the invention, the motor efficiency is high, the torque ripple and the harmonic electromagnetic force of the motor can be effectively reduced, and the motor operation vibration noise is reduced.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to an iron core structure, a rotor assembly and a permanent magnet motor. Background technique [0002] Due to the advantages of simple structure, small size and high efficiency, permanent magnet motors are widely used in various fields such as medical equipment, CNC machine tools, home appliances and automobiles. Correspondingly, there have been more and more researches on permanent magnet motors in recent years. [0003] For example, the Chinese invention patent application with application number 201310164969.8 discloses a rotor assembly and a permanent magnet motor including the rotor assembly. The rotor assembly includes a rotor core and a plurality of permanent magnet groups uniformly arranged in a circumferential direction of the rotor core. Each of the permanent magnet groups includes a first permanent magnet located in the middle of the permanent magnet group and a second ...

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Problems solved by technology

[0004] However, the above-mentioned rotor core structure has many and small magnetic isolation slots, the process is complicated, the manufacturing cost is high, and the structure is relatively complicated. In addition, its influence on the efficiency of the motor is not reflected. In the distributed winding motor, this method is very important for reducing the torque ripple of the motor. and harmonic electromagnetic force, as well as limited effect on vibration and noise of motor operation

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