Motor rotor and motor including same

Abstract

The invention discloses a motor rotor and a motor including the motor rotor. The motor rotor includes a rotor core, a magnetic steel and a fixed part for limiting the magnetic steel in an axial direction of the rotor core. The rotor core is a cylindrical structure. The magnetic steel and an outer wall of the rotor core fit. The motor rotor also comprises a limit part which covers the at least a part of a wall surface of the magnetic steel so as to limit the magnetic steel in a circumferential direction and a radial direction of the rotor core. The limit part is arranged on the rotor core and / or the fixed part. According to the motor rotor, a mechanical structure is used to fix the magnetic steel, and the reliability of magnetic steel installation is improved. Moreover, the magnetic steel is limited through the cooperation of the limit part and the side wall of the magnetic steel, making a gap in the magnetic steel is not needed, the structure of the magnetic steel is not damaged, so the strength of the magnetic steel is not affected, and the reliability of the rotor is further improved.

Description

technical field [0001] The invention relates to the technical field related to motors, in particular to a motor rotor and a motor including the same. Background technique [0002] Surface permanent magnet motors are widely used in refrigeration compressors due to their good operating performance, high efficiency, simple structure and low manufacturing cost. Among them, the permanent magnet motor with the surface insertion rotor structure can use the reluctance characteristics generated by the asymmetry of the rotor magnetic circuit to increase the power density of the motor and improve the dynamic performance, and is often used by permanent magnet motors. In the existing surface-inserted rotor structure, most adhesives such as glue are used to directly paste the magnetic steel on the surface of the rotor. [0003] However, there are the following problems in adopting the above method to fix the magnetic steel: 1. Manual operation is often used for pasting the magnetic steel...

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Problems solved by technology

[0003] However, there are the following problems in fixing the magnetic steel by the above method: 1. Manual operation is often used for pasting the magnetic steel, the thickness of the glue application cannot be guaranteed, and the product consistency and reliability are poor

This can solve the problem of bonding the magnetic steel, but there are still some problems in this way, such as: 1. The magnetic steel has a small gap area, the contact area between the fixed plate and the magnetic steel is small, there is no fastening fit, and the magnetic steel exists. Shaking phenomenon; 2. The thickness of the magnet steel in the gap is severely reduced, the contact strength is weak, and the magnet itself is relatively brittle. During operation, the gap is easy to break, causing the magnet to fall off

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