Motors, compressors and refrigeration equipment

Abstract

The invention provides a motor, a compressor and refrigeration equipment. The motor includes: a stator, the stator includes a stator core and windings, the stator core is provided with a plurality of stator convex teeth, and the winding is wound on a plurality of stator convex teeth; the rotor, the rotor includes a rotor core and a permanent magnet, and the permanent magnet is arranged on the rotor The iron core; the ratio of the number of stator teeth and the number of phases of the winding is configured to be suitable for adjusting the strength of the demagnetizing reverse magnetic field generated by electrifying the winding. By designing the ratio of the number of stator convex teeth to the phase number of the winding, the strength of the demagnetization reverse magnetic field generated by the electrification of the winding can be adjusted, so that even if the permanent magnet lacks heavy rare earth elements such as dysprosium and terbium, it can still increase the stator convex teeth. The ratio of the number to the number of winding phases is used to reduce the demagnetization reverse magnetic field generated by the winding energization, so that the demagnetization reverse magnetic field is not enough to demagnetize the permanent magnet, improve the overall anti-demagnetization ability of the motor, and then help to propose a method that meets the requirements of reducing weight. Rare earth elements can also ensure the motor's ability to resist demagnetization.

Description

technical field [0001] The invention belongs to the technical field of refrigeration equipment, and in particular relates to a motor, a compressor and a refrigeration equipment. Background technique [0002] At present, in the field of air conditioner compressors, frequency conversion motors have become the mainstream technology, especially with the newly promulgated energy efficiency level standards for household air conditioners in 2019, fixed speed models have gradually withdrawn from the market, and the era of all frequency conversion has come. In order to adapt to the application environment of household air conditioners, most of the permanent magnets of variable frequency motors are NdFeB permanent magnets containing heavy rare earth elements and high intrinsic coercive force. Strategic resources of heavy rare earth elements (especially dysprosium and terbium) are also increasing year by year. In order to reduce the consumption of strategic resources, non-heavy rare e...

AI Technical Summary

Problems solved by technology

However, studies have shown that the reduction of heavy rare earth content in permanent magnets will cause a decrease of more than 40% in the anti-demagnetization ability of the motor

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