Rotor assembly, motor and household appliance
A component and rotor technology, applied in the direction of motors, electric components, magnetic circuit rotating parts, etc., can solve the problems of low power density of motors, magnetic flux leakage at the end, high cost of motors, etc., to reduce magnetic flux leakage, improve power density, Effect of reducing motor cost
Active Publication Date: 2021-06-22
GUANGDONG WELLING ELECTRIC MACHINE MFG
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Problems solved by technology
[0002] In the related art, the built-in rotor core is usually made of one-piece stamping of magnetically conductive material, and a large part of the magnetic flux generated by the permanent magnet passes through the fan-shaped part of the rotor core, and passes through the connecting part and the rotor sleeve part (the protrusion part and the rotor sleeve part). The shaft sleeve is integrated into a whole) for circulation, this part of the magnetic flux basically does not generate energy exchange for the motor, does not generate electromagnetic torque, resulting in a large end magnetic flux leakage phenomenon, resulting in low motor power density and high motor cost
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[0033] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0034] Refer below Figure 1-Figure 10 Rotor assemblies provided according to some embodiments of the invention are described.
[0035] Such as Figure 1-Figure 4 As shown, the rotor assembly according to the embodiment of the present invention includes a shaft sleeve 1, a rotor core 2 and a permanent magnet 3, wherein the shaft sleeve 1 is generally cylindrical, and the rotor core 2 and the permanent magnet 3 are located on the periphery of the shaft sleeve 1. side, and there are multiple rotor cores 2 and permanent magnets 3 , and multiple permanent magnets 3 and multiple rotor cores 2 are alternately arranged in sequence along the circumferential direction o...
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The invention discloses a rotor assembly, a motor and a household electrical appliance. The rotor assembly comprises a shaft sleeve, a plurality of rotor cores, a plurality of permanent magnets, a plurality of limiting bosses and an injection molding body, the shaft sleeve is made of a weak magnetic conductive material, the plurality of permanent magnets and the plurality of rotor cores are sequentially and alternately arranged along the circumferential direction of the shaft sleeve, and the plurality of limiting bosses are arranged on the shaft sleeve. The rotor iron core comprises protruding parts, a spacing distance exists between any two protruding parts, the limiting bosses are arranged on the peripheral wall of the shaft sleeve and extend in the axial direction of the shaft sleeve, the limiting bosses are divided into a plurality of pairs, a first groove is formed between each pair of limiting bosses, and the shaft sleeve, the rotor iron core, the permanent magnet and the injection molding body are integrally formed through injection molding. According to the rotor assembly provided by the embodiment of the invention, the magnetic circuit magnetic flux flowing through the rotor iron core and the shaft sleeve is effectively limited, so that the magnetic leakage phenomenon of the end part of the rotor is reduced, the motor power density is improved, and the motor cost is reduced.
Description
technical field [0001] The invention relates to the technical field of motors, in particular to a rotor assembly, a motor and household appliances. Background technique [0002] In the related art, the built-in rotor core is usually made of one-piece stamping of magnetically conductive material, and a large part of the magnetic flux generated by the permanent magnet passes through the fan-shaped part of the rotor core, and passes through the connecting part and the rotor sleeve part (the protrusion part and the rotor sleeve part). The shaft sleeve is integrated as a whole) for circulation, this part of the magnetic flux basically does not generate energy exchange for the motor, does not generate electromagnetic torque, resulting in a large end magnetic flux leakage phenomenon, resulting in low motor power density and high motor cost. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain...
Claims
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IPC IPC(8): H02K1/27
CPCH02K1/276Y02T10/64
Inventor 邵非非张婷婷李文瑞李虎
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG