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A fractional slot concentrated winding permanent magnet motor with low vibration and noise performance and its design method

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

Active Publication Date: 2019-08-02
JIANGSU UNIV
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AI Technical Summary

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 of the stator and rotor of the original fractional slot concentrated winding motor, and propose a simple, effective and easy-to-execute method

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  • A fractional slot concentrated winding permanent magnet motor with low vibration and noise performance and its design method
  • A fractional slot concentrated winding permanent magnet motor with low vibration and noise performance and its design method
  • A fractional slot concentrated winding permanent magnet motor with low vibration and noise performance and its design method

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Embodiment Construction

[0048] reference 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 winding in the air gap. The higher the tooth harmonic content, the higher the vibration of the motor. And the greater the noise. The present invention includes an outer stator 1 with three types of teeth, symmetrical teeth 15, asymmetrical teeth 16, and additional teeth 17. Motor slot potential star diagram 200. Generally, sinusoidally distributed waves 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 phase difference of the magnetomotive force harmonics represented in space. A wavelength apart in space, the d...

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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 the 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 larger magnetomotive force in the air gap of the motor, and improve the back EMF and output torque of the motor. However, the biggest shortcoming 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 those with the same rotating frequency as the rotor The sub-harmonics can act to produce output torque, and other sub-harmonics will produce huge eddy current loss in the permanent magnet of the motor rotor, especially for surface mount ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/16H02K3/28
Inventor 赵文祥吴蒙蒙吉敬华
Owner JIANGSU UNIV
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