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A Method for Reducing Electromagnetic Vibration and Noise of Automotive Claw Pole Generator Based on Magnetic Pole Eccentricity

A technology of electromagnetic vibration and generator, applied in the direction of salient poles, magnetic circuit shape/style/structure, etc., can solve the problems of no public reports of technical solutions, etc., to weaken torque ripple, improve air gap magnetic density distribution, reduce electromagnetic Effects of Vibration and Noise

Active Publication Date: 2015-12-23
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But, also do not have the public report of relevant technical scheme so far

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  • A Method for Reducing Electromagnetic Vibration and Noise of Automotive Claw Pole Generator Based on Magnetic Pole Eccentricity
  • A Method for Reducing Electromagnetic Vibration and Noise of Automotive Claw Pole Generator Based on Magnetic Pole Eccentricity

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Embodiment Construction

[0012] The method of reducing the electromagnetic vibration noise of the automotive claw pole generator based on the eccentricity of the magnetic pole in this embodiment is:

[0013] Such as figure 1 As shown, it is assumed that the plane where the axially protruding end of each claw pole of the N pole and S pole of the claw pole generator is located on the radial section is the S plane; the axial protruding end of the claw pole is on the S plane There are outer arc lines and inner arc lines ( figure 1 The inner circular arc line represented by the middle solid line); make: the center of the outer circular arc line is point O, the midpoint of the outer circular arc line is point A, and the center point of the inner circular arc line is point O′, then point O′ is It is located on the extension line of the line connecting OA at the end of point O, and the distance from point O is Δh. The S section is the section at any position along the axial direction of each claw pole. Loc...

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Abstract

The invention discloses a method for reducing electromagnetic vibration noise of an automobile claw-pole power generator and on the basis of magnetic pole eccentricity. The method for reducing the electromagnetic vibration noise of the automobile claw-pole power generator and on the basis of the magnetic pole eccentricity is characterized in that the plane where the section, in the radial direction, of the extending end in the axial direction of each claw pole of the N pole and the S pole of the claw-pole power generator is located is set to be an S surface, and an outer circular arc line and an inner circular arc line of the extending end, in the axial direction, of each claw pole are formed on the S surface; the circle center of each outer circular arc line serves as an O point, the midpoint of each outer circular arc line serves as an A point, the circle center of each inner circular arc line serves as an O' point, the O' point is located on an extension line at one end, at the position of the O point, of a connection line between the O point and the A point, and the distance between the O' point and the O point is deltah. Compared with the arrangement that each outer circular arc line and each inner circular arc line are set to be concentric, the method for reducing the electromagnetic vibration noise of the automobile claw-pole power generator and on the basis of the magnetic pole eccentricity improves distribution of gap flux densities, waveforms of the gap flux densities corresponding to the claw poles trend to be sine-shaped, torque pulsation caused by air-gap field harmonic is reduced, and electromagnetic vibration and electromagnetic noise of the automobile claw-pole power generator are reduced.

Description

technical field [0001] The invention relates to a method for reducing electromagnetic vibration and noise of an automobile claw pole generator based on magnetic pole eccentricity, in particular to a method for reducing electromagnetic vibration and noise based on reducing torque ripple of an automobile claw pole generator. Background technique [0002] Due to the particularity of the magnetic pole structure of the automotive claw pole generator, there are a large number of harmonic components in the air gap magnetic field, especially the torque ripple caused by the low-order magnetic field harmonics is likely to generate large electromagnetic vibration and noise. When the frequency of the torque ripple coincides with the mechanical resonance frequency of the stator or rotor, the vibration and noise of the automotive generator will be amplified. At present, the method of controlling electromagnetic vibration and noise of automotive claw-pole generators mainly starts with air-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/08
Inventor 鲍晓华吴锋杨帆王汉丰程志恒梁娜
Owner HEFEI UNIV OF TECH
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