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Method for suppressing vibration of built-in permanent magnet motor and improving torque performance

A permanent magnet motor, built-in technology, applied in the direction of magnetic circuit rotating parts, magnetic circuit static parts, magnetic circuit shape/style/structure, etc. Cogging torque and other problems, to achieve the effect of improving performance, suppressing amplitude, and reducing cogging torque

Inactive Publication Date: 2018-09-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology has the problem of optimizing only one aspect of performance, that is, (1) the combination of near-slot poles can reduce the cogging torque, but it will also lead to the generation of low-order electromagnetic force harmonics, (2 ) reduces the cogging torque, ignoring the change of the electromagnetic force of the motor; (3) reduces the low-order electromagnetic force, ignoring the influence on the cogging torque; (4) some existing technologies (such as oblique pole ) Although it can reduce the electromagnetic force and torque ripple, it reduces the torque output capability of the motor

Method used

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  • Method for suppressing vibration of built-in permanent magnet motor and improving torque performance
  • Method for suppressing vibration of built-in permanent magnet motor and improving torque performance
  • Method for suppressing vibration of built-in permanent magnet motor and improving torque performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this embodiment, the rotor q Auxiliary grooves are opened at the shaft position, in figure 1 Auxiliary grooves are provided on the stator armature teeth shown to obtain the stator structure of this embodiment, as shown in Figure 3-1 shown.

[0035] Since the auxiliary grooves are provided on the stator armature teeth in this embodiment, the number of equivalent slots on the inner surface of the stator is changed to a certain extent, thereby changing the harmonics of the stator magnetic conduction teeth and reducing the first-order harmonics of the stator teeth , and finally reduce the amplitude of the second-order electromagnetic force harmonic of the motor.

Embodiment 2

[0037] This embodiment maintains the rotor q The structure of the auxiliary groove at the shaft position remains unchanged. figure 1 Auxiliary grooves are provided on the fault-tolerant teeth of the stator shown, and the stator structure of this embodiment is obtained, as shown in Figure 3-2 shown.

[0038] Since the auxiliary grooves are provided on the stator armature teeth in this embodiment, the number of equivalent slots on the inner surface of the stator is changed to a certain extent, thereby changing the harmonics of the stator magnetic conduction teeth and reducing the first-order harmonics of the stator teeth , and finally reduce the amplitude of the second-order electromagnetic force harmonic of the motor.

Embodiment 3

[0040] This embodiment maintains the rotor q The structure of the auxiliary groove at the shaft position remains unchanged. figure 1 The shown stator armature teeth and fault-tolerant teeth are provided with auxiliary grooves to obtain the stator structure of this embodiment, as shown in Figure 3-3 shown.

[0041] Since the auxiliary grooves are provided on the stator armature teeth in this embodiment, the number of equivalent slots on the inner surface of the stator is changed to a certain extent, thereby changing the harmonics of the stator magnetic conduction teeth and reducing the first-order harmonics of the stator teeth , and finally reduce the amplitude of the second-order electromagnetic force harmonic of the motor.

[0042] Figure 4 It is a comparison diagram of the cogging torque of the motors of the above three embodiments obtained through finite element simulation and the cogging torque of the original motor. Compared with the cogging torque of the original m...

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Abstract

The invention discloses a method for suppressing vibration of a built-in permanent magnet motor and improving torque performance. The method comprises the steps of (1), adding auxiliary grooves at q-axis positions on the surface of a cylindrical rotor core; and (2), simultaneously adding auxiliary grooves on armature teeth and / or fault tolerance teeth of the stator core. According to the method ofthe invention, through simultaneously adding auxiliary grooves at the q-axis positions on the surface of the rotor core and the stator tooth surfaces of the stator core of a single-layer centralizedbuilt-in permanent magnet motor, and further realizing influence to an interaction mechanism between a stator tooth harmonic wave magnetic field and a rotor permanent magnetic field, low-order harmonic wave amplitude of a radial electromagnetic force is suppressed and gullet torque is reduced. Finally suppression for vibration and noise of the single-layer centralized built-in permanent magnet motor and optimization of motor output torque performance can be finally realized.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet motor vibration control, in particular to a method for suppressing vibration of a built-in permanent magnet motor and improving torque performance. Background technique [0002] Fractional-slot concentrated-winding PM motors have attracted extensive attention and applications due to their high efficiency, high torque / power density, low cogging torque, and fault tolerance. However, the electromagnetic vibration and noise of permanent magnet motors seriously affect people's living and working environment as an additional effect, which limits the application of permanent magnet motors in low vibration and noise fields. Compared with the double-layer concentrated winding permanent magnet motor, the electromagnetic vibration and noise problems of the single-layer concentrated winding permanent magnet motor are more significant. [0003] It is generally believed that the vibration of the motor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/12H02K1/22
CPCH02K1/12H02K1/22
Inventor 樊英邬占川
Owner SOUTHEAST UNIV
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