Rotor, built-in permanent magnet motor and compressor

Abstract

The present invention provides a rotor, a built-in permanent magnet motor and a compressor. The rotor is used in the built-in permanent magnet motor and includes a rotor core; multiple permanent magnetsinstalled inside the rotor core at intervals; multiple air tanksarranged to be adjacent to the end portion fo the permanent magnet and close to the outer periphery of the rotor; multiple dents, each dent being arranged on the outer periphery of the rotor and making air gap flux density between the outer periphery of rotor and inner circumference of the stator of built-in permanent magnet motor being close to the sine curve.

Description

technical field [0001] The invention relates to the field of permanent magnet motors, in particular to a rotor configuration of an interior permanent magnet motor, an interior permanent magnet motor using the rotor and a related compressor. Background technique [0002] Generally, a permanent magnet motor such as a brushless DC motor has permanent magnets mounted on a rotor core to generate rotational driving force. Based on how permanent magnets are installed on the rotor core, permanent magnet motors are classified into surface-mounted permanent magnet motors and built-in permanent magnet motors. [0003] Typically, an interior permanent magnet motor has a plurality of permanent magnets mounted in the rotor core. An interior permanent magnet motor consists of a stator, coils wound around the stator, and a rotor. The rotor is rotatably arranged in the stator. [0004] However, the rotor structure of the traditional interior permanent magnet motor often leads to poor dist...

AI Technical Summary

Problems solved by technology

[0004] However, the rotor structure of traditional interior permanent magnet motors often leads to poor air gap magnetic field distribution of interior permanent magnet motors, and makes it difficult to ensure the concentricity of the rotor and stator during assembly

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