Low-vibration noise performance fractional slot concentrated winding permanent magnet motor and design method

A technology of concentrated winding and permanent magnet motor, which is applied in the shape/style/structure of winding conductors, static parts of magnetic circuit, shape/style/structure of magnetic circuit, etc., to reduce eddy current loss and reduce harmonics of magnetomotive force teeth , the effect of reducing vibration and noise

Active Publication Date: 2018-01-12
JIANGSU UNIV
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Problems solved by technology

[0004] The purpose of this invention is to solve the problem of a large number of magnetomotive force harmonics in the air gap magnetic field

Method used

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  • Low-vibration noise performance fractional slot concentrated winding permanent magnet motor and design method
  • Low-vibration noise performance fractional slot concentrated winding permanent magnet motor and design method
  • Low-vibration noise performance fractional slot concentrated winding permanent magnet motor and design method

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Embodiment Construction

[0048] refer to figure 1 , the present invention is a method for reducing the vibration and noise characteristics of a fractional slot concentrated winding permanent magnet motor. The vibration and noise of the motor are affected by the tooth harmonics generated by the energized windings in the air gap. The higher the tooth harmonic content, the higher the vibration of the motor. and noisier. The present invention includes an outer stator 1, which contains three kinds of teeth, symmetrical teeth 15, asymmetrical teeth 16, and additional teeth 17. Motor slot potential star diagram 200, in general, a wave with a sinusoidal distribution in any space can be represented by a space vector, therefore, the magnetomotive force wave generated by each coil can be represented by a line segment, and the arrow represents the vector direction. The angle between each vector is equal to the spatial phase difference of the represented magnetomotive force harmonics, spaced apart by one wavelen...

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Abstract

The invention discloses a low-vibration noise performance fractional slot concentrated winding permanent magnet motor and a design method, and belongs to the field of rotating motors. On the basis ofa motor matched with an existing notched pole, and some stator additional teeth are correspondingly added (the specific number of the teeth is determined according to the matched notched pole of the motor). For a three-phase 18/16 motor, six additional teeth are added, the position of each stator notch is calculated, and the winding structure adopts a concentrated winding structure corresponding to the three-phase 18/16 motor. The rotor structure adopts the common surface-mounted structure, and radial magnetizing is adopted; the motor has the advantages that the stator structure is changed, the content of tooth harmonic waves in the winding magnetomotive force in an air gap is lowered, therefore, the motor vibration and noise are lowered, and meanwhile the rotating torque of the motor is ensured. In addition, due to changes of the stator structure, the content of subharmonic waves of the magnetomotive force in the air gap is lowered, and then eddy-current losses generated in the permanent magnet are lowered. Accordingly, the motor has the great significance in motor body designing.

Description

technical field [0001] The invention relates to a motor manufacturing technology, in particular to a technology for reducing loss and vibration of a fractional slot concentrated winding motor. Background technique [0002] The stator structure of the traditional fractional slot concentrated winding permanent magnet motor is symmetrical. The concentrated winding structure can generate a large magnetomotive force in the air gap of the motor and improve the back EMF and output torque of the motor. However, the biggest disadvantage of the fractional slot concentrated winding permanent magnet motor is that the energized winding will generate a variety of magnetomotive force harmonics in the air gap. Among these magnetomotive force harmonics, only the one with the same frequency as the rotor rotation Sub-harmonics can act to generate output torque, and other sub-harmonics will generate huge eddy current losses in the permanent magnet of the motor rotor, especially for surface-moun...

Claims

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Application Information

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IPC IPC(8): H02K1/16H02K3/28
Inventor 赵文祥吴蒙蒙吉敬华
Owner JIANGSU UNIV
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