Motor and compressor

Abstract

The invention provides a motor and a compressor, wherein the motor comprises a rotor iron core and magnets arranged on the rotor iron core; each magnet is of a circular arc-shaped structure; the circular arc-shaped structure comprises an inner surface and an outer surface which are arranged at intervals; the inner surface is in a first arc surface shape matched with the rotor iron core; and the outer surface comprises an arc surface section in a second arc surface shape and tangent plane sections connected at the two ends of the arc surface section. By using the technical scheme, the magnets are of the circular arc-shaped structures, and the inner surface is in the first arc surface shape matched with the rotor iron core, so that the inner surface can be better attached to the rotor iron core; the air gap uniformity of a motor is ensured; and the performance of the motor is further ensured. Meanwhile, the outer surface also comprises the tangent plane sections connected at the two ends of the arc surface section; through the tangent plane sections, manufacturing materials of the magnets can be reduced; the air gap harmonic wave content is reduced; the goals of reducing vibration and lowering the noise can be achieved; and the problem of sinusoidal air gap flux density can be solved.

Description

technical field [0001] The invention relates to the technical field of home appliances, in particular to a motor and a compressor. Background technique [0002] Permanent magnet synchronous motors are widely used in various industries, and the research on permanent magnet synchronous motors is becoming more and more mature. Motors have achieved a lot in terms of performance, speed range, noise, driving force, cost saving, and special occasions. The surface-mounted permanent magnet motor has the advantages of high pole arc coefficient and large output. [0003] Patent No. CN103368299 discloses a technical solution of a surface-mounted permanent magnet motor rotor magnetic pole structure of a neodymium-iron-boron magnet. In this technical solution, by designing the magnet into a trapezoidal structure and cutting off acute angles on both sides, the cost of the magnet can be saved, the harmonic content of the air gap can be reduced, and the purpose of vibration and noise reduc...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a motor and a compressor to solve the problem of uneven air gap of the motor in the prior art

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