Permanent magnet and direct current brush motor for automobile air conditioner

Abstract

The invention discloses a permanent magnet and direct current brush motor for an automobile air conditioner. The motor comprises a casing (2), a permanent magnet (3), a rotor (4), an electrical brush (6) and a commutator (8), wherein the permanent magnet (3) is fixed in the cavity of the casing (2); the permanent magnet (3) has a tile-shaped irregular section which is asymmetrical; the outer arc (3R) and the inner arc (3r) of the tile-shaped irregular section of the permanent magnet are not concentric; and the radius (r) of the inner arc of the tile-shaped irregular section of the permanent magnet is larger than the radius (R) of the outer arc of the tile-shaped irregular section of the permanent magnet. By adopting the technical scheme, the permanent magnet with the tile-shaped irregular section is adopted, so that the distribution form of a magnetic field is closer to the form of a sine wave, and the odd harmonics of the magnetic field are effectively reduced; and a chute structure is adopted by the rotor to reduce the relative magnetic resistance fluctuation in the axial magnetic fields of the permanent magnet and the tooth sockets of the rotor, so that tooth socket moment fluctuation is effectively reduced, the noise of the motor is reduced, and the service life of the motor is prolonged.

Description

technical field [0001] The invention relates to the field of auto parts, more specifically, the invention relates to a permanent magnet DC brushed motor for an auto air conditioner. Background technique [0002] In recent years, the automobile industry has developed rapidly. In addition to the extensive use of air-conditioning systems in cars and buses, some trucks are gradually installing air-conditioning systems in response to market requirements, which improves the comfort of automobiles. However, as one of the key components of automotive air conditioners, the permanent magnet DC brushed motor has problems such as high noise and electromagnetic torque fluctuations, which hinder the stable operation of the motor, thereby affecting the overall performance of the motor and reducing the service life of the motor. Contents of the invention [0003] The problem to be solved by the present invention is to provide a permanent magnet DC brushed motor for automobile air conditio...

AI Technical Summary

Problems solved by technology

However, as one of the key components of automotive air conditioners, the permanent magnet DC brushed motor has problems such as large noise and electromagnetic torque fluctuations, which hinder the stable operation of the motor, thereby affecting the overall performance of the motor and reducing the service life of the motor.

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