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Rotor structure, motor and household electrical appliance

A technology of rotor structure and rotor body, applied in the direction of magnetic circuit shape/style/structure, electrical components, electromechanical devices, etc., can solve problems such as restricting motor torque, insufficient motor output, insufficient air gap magnetic density, etc., and achieve optimization. The effect of magnetic density distribution, torque ripple reduction and torque improvement

Active Publication Date: 2019-10-18
GREE ELECTRIC APPLIANCES INC +1
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  • Abstract
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Problems solved by technology

Therefore, insufficient air gap magnetic density will restrict the torque of the motor, resulting in insufficient output of the motor

Method used

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  • Rotor structure, motor and household electrical appliance
  • Rotor structure, motor and household electrical appliance
  • Rotor structure, motor and household electrical appliance

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Embodiment Construction

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] see in conjunction Figure 1 to Figure 5 As shown, a rotor structure is used for alternating pole motors, including: permanent magnet poles 1, alternating poles 2; air slots, the air slots are set in the permanent magnet poles 1 and / or alternating poles 2, and the air slots are used to increase the permanent magnet poles 1 and / or the air gap flux density o...

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Abstract

The invention provides a rotor structure, a motor and a household electrical appliance. The rotor structure is used for an alternating pole motor. The rotor structure comprises permanent magnetic poles, alternating poles and air grooves; the air grooves are formed in the permanent magnetic poles and / or the alternating poles; and the air grooves are used for increasing the gap flux density of the permanent magnetic poles and / or the alternating poles. According to the rotor structure, the motor and the household electrical appliance of the invention, the air grooves are formed in the permanent magnetic poles and / or the alternating poles, so that flux density distribution in the magnetic poles is optimized, and gap flux density at the magnetic poles is increased, and therefore, the torque ofthe motor is improved; with the air grooves adopted, the flux density waveforms of the rotor are optimized, and therefore, the flux density waveforms of the rotor tend to be sinusoidal, the torque pulsation of the motor is reduced, and the vibration and noise of the motor are reduced.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a rotor structure, a motor and household appliances. Background technique [0002] In the existing alternating pole permanent magnet motor, the soft magnetic material between the two permanent magnet installation slots is magnetized by the permanent magnet pole to have the opposite polarity to the permanent magnet pole, so it is called an alternating pole permanent magnet motor. [0003] Although this type of motor can reduce the amount of permanent magnets used and greatly reduce the cost of the motor, the reduction in the amount of permanent magnets used will result in the inability to form a large air gap flux density. The magnetic field in the air gap has both radial and tangential components, but the radial component is the main one. Therefore, the air-gap magnetic field and air-gap magnetic density are usually referred to as the radial component by default. For ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K1/276H02K2213/03H02K2201/03H02K1/2746
Inventor 魏正平李权锋黄侠昌王周叶陈建邓文科刘思苑汪汉新
Owner GREE ELECTRIC APPLIANCES INC
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