Stator, electric motor, compressor and refrigeration device

Abstract

The invention discloses a stator, an electric motor, a compressor and a refrigeration device. The stator comprises a stator iron core and a wire coil winding, wherein the stator iron core is provided with N stator slots that are uniformly arranged in a circumferential direction, the wire coil winding comprises a first main winding and a second main winding that are symmetrically arranged as well as a first auxiliary winding and a second auxiliary winding that are symmetrically arranged, the first main winding and the second main winding respectively comprise N1 layers of main winding wire coils, the first auxiliary winding and the second auxiliary winding respectively comprise N2 layers of auxiliary winding wire coils, each layer of the main winding wire coils or each layer of the auxiliary winding wire coils are embedded in two of the stator slots, a single layer wire coil is embedded in each stator slot, and N meets requirements of a formula N=4*(N1+N2). In the stator disclosed in the invention, only one single layer wire coil can be placed in each stator slot when the main and auxiliary windings are arranged symmetrically, utilization rates of stator iron core material can be improved while low order subharmonic waves of the electric motor can be reduced, and production cost can be lowered.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a stator, a motor, a compressor and refrigeration equipment. Background technique [0002] Single-phase motors with two-pole winding structure are widely used in compressors with non-adjustable speed because of their reliability and excellent performance. In the prior art, when the above-mentioned single-phase motor has many stator slots, at least one layer of main winding coil and one layer of auxiliary winding coil share the same stator slot. Excessively high harmonic potentials are induced on the coil windings, especially the low-order third harmonic potentials and fifth harmonic potentials, so as to avoid slow starting of the motor and excessive noise. [0003] But on the other hand, the stator slot filling rate of the motor with the above-mentioned winding structure is generally not high, and some stator slots may be left empty, resulting in waste of materials and incre...

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Problems solved by technology

[0003] But on the other hand, the stator slot filling rate of the motor with the above-mentioned winding structure is generally not high, and some stator slots may be left empty, resulting in waste of materials and increased production costs; and at this time, the winding factor of the motor is relatively low , making the performance of the motor degrade and thus lack of market competitiveness

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