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Rotor with low electromagnetic torque ripple and low noise and parametric modeling method thereof

A torque ripple, low electromagnetic technology, applied in the field of low electromagnetic torque ripple and low noise rotor and its parametric modeling, to achieve harmonic amplitude reduction, electromagnetic radial force reduction, reduce electromagnetic torque ripple Effect

Pending Publication Date: 2021-07-27
NANJING NORMAL UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the radial electromagnetic force depends on the air gap flux density, many scholars have reduced the electromagnetic noise by reducing the harmonics of the air gap flux density, but no one has proposed a corresponding rotor structure to solve the electromagnetic noise of the permanent magnet synchronous motor question

Method used

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  • Rotor with low electromagnetic torque ripple and low noise and parametric modeling method thereof
  • Rotor with low electromagnetic torque ripple and low noise and parametric modeling method thereof
  • Rotor with low electromagnetic torque ripple and low noise and parametric modeling method thereof

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Embodiment

[0034] Example: See Figure 1-6 A low-electromagnetic tum torque pulsation and low noise rotor comprise a rotor core 3, and the rotor core 3 is uniformly disposed in its circumferential direction, each of the magnetic poles is formed by two magnetic steel 2, rotor iron The core 3 is provided between the adjacent two magnetic poles, and there is a air tank 5 between the adjacent absorber 4, and the outer contour of the rotor core 3 is cut into segmented anti-surpass function curves, specifically See figure 1 , 3 The rotor core edge 1 in 6, the segmented anti-cosine function curve of the outer contour of the rotor core 3 is determined by the following formula:

[0035]

[0036] In L g (θ) is air gap length, B m Is the air gap magnetic flux density generated by the magnetic steel 2 when the rotor did not change the rotor, L g For the initial length of the air gap, k is the magnitude of the air gap magnetic tester after changing the rotor shape;

[0037] Among them, a plurality of ma...

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Abstract

The invention discloses a rotor with low electromagnetic torque pulsation and low noise and a parametric modeling method thereof, and relates to the technical field of motors, the rotor structure comprises a rotor core, a plurality of magnetic poles are uniformly arranged in the rotor core along the circumferential direction, and each magnetic pole is formed by two magnetic steels. A magnetic isolation bridge is arranged between every two adjacent magnetic poles in the rotor core, the outer contour of the rotor core is cut into a segmented arc cosine function curve, the rotor structure can effectively reduce electromagnetic torque pulsation, in addition, due to sinusoidal air gap flux density, the harmonic amplitude of the air gap flux density is reduced, electromagnetic radial force is reduced, and the electromagnetic torque pulsation is reduced. Vibration and noise reduction of the motor are achieved.

Description

Technical field [0001] The present invention relates to the field of motor technology, in particular, to a rotor of low electromagnetic torque pulsation and low noise and its parameterization modeling method. Background technique [0002] In recent years, with the rapid development of electric vehicles, people's requirements for driving comfort are increasing. Noise, vibration and vibration roughness are one of the most important performance indicators of the automotive. Driver motor as one of the key components of electric vehicles, its performance determines the main performance of electric vehicles. [0003] The permanent magnet synchronous motor has the advantages of simple structure, reliable operation, low loss, high efficiency, and flexibility in size, and is widely used in the driving of electric vehicles. The vibration and noise of the motor is one of the problems currently being solved. The source of motor noise can be roughly divided into three categories: aerodynamic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/23G06F17/15H02K1/27G06F111/10G06F119/10
CPCG06F30/17G06F30/23G06F17/15H02K1/2766G06F2111/10G06F2119/10
Inventor 葛浩锐郭保成邱鑫杨建飞金振白晨光张永民
Owner NANJING NORMAL UNIVERSITY
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