MOTOR, COMPRESSOR, AND REFRIGERATION DEVICE

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The present invention provides a motor, a compressor and a refrigeration device. The motor comprises : a stator, comprising a stator core and a winding, the stator core being provided with a plurality of stator protruding teeth, and the winding being wound on the plurality of stator protruding teeth; and a rotor, comprising a rotor core and a permanent magnet, the permanent magnet being arranged on the rotor core, wherein a ratio of the number of the stator protruding teeth to the number of phases of the winding is configured to be adapted to adjust the strength of a demagnetization reverse magnetic field generated by energizing the winding. By designing the ratio of the number of the stator protruding teeth to the number of the phases of the winding to adjust the strength of the demagnetization reverse magnetic field generated by energizing the winding, despite the lack of heavy rare earth elements such as dysprosium and terbium in the permanent magnet, the demagnetization reverse magnetic field generated by energizing the winding can still be reduced by increasing the ratio of the number of the stator protruding teeth to the number of the phases of the winding, such that the demagnetization reverse magnetic field is insufficient to demagnetize the permanent magnet, which improves the overall anti-demagnetization ability of the motor, and is beneficial to proposing a motor that not only satisfies the reduction of heavy rare earth elements, but also ensures the anti-demagnetization ability of the motor.