Method for computing air gap flux density of permanent magnet motor

A technology of air-gap flux density and permanent magnet motors, which is applied in the field of motors, can solve the problems of poor versatility and inaccurate calculation of air-gap flux density of permanent magnet motors, and achieve accurate calculation results

Inactive Publication Date: 2013-09-04
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of inaccurate calculation of air-gap flux density of existing permanent magnet motors and poor versatility, and proposes a method for calculating the air-gap flux density of permanent magnet motors

Method used

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  • Method for computing air gap flux density of permanent magnet motor
  • Method for computing air gap flux density of permanent magnet motor
  • Method for computing air gap flux density of permanent magnet motor

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Experimental program
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specific Embodiment 1

[0047] Such as figure 2, for the radial magnetic field permanent magnet motor, establish the physical model of the circumferential magnetic circuit, in order to reduce the calculation amount, only establish a pair of magnetic pole models, set the boundary conditions, material properties and magnetization direction, use finite element software, such as ANSYS, MAXWELL , COMSOL, FEKO, etc. to solve the electromagnetic field, divide the air gap into 2 equal parts and take the average value to obtain the magnetic flux density distribution curve of the circumferential magnetic circuit air gap. Similarly, the physical model of the radial magnetic circuit is established, as image 3 , to obtain the radial magnetic circuit air gap magnetic flux density distribution curve.

[0048] According to the distribution curve of the air gap magnetic flux density of the circumferential magnetic circuit, calculate the average value B of the air gap magnetic flux density of the circumferential mag...

specific Embodiment 2

[0054] Such as Figure 4 , for an axial field permanent magnet motor, establish a physical model of the circumferential magnetic circuit, in order to reduce the amount of calculation, only establish a pair of magnetic pole models, set the boundary conditions, material properties and magnetization direction, use finite element software, such as ANSYS, MAXWELL , COMSOL, FEKO, etc. to solve the electromagnetic field, divide the air gap into two equal parts and take the average value to obtain the magnetic flux density distribution curve of the air gap in the circumferential magnetic circuit. Similarly, as Figure 5 , establish the physical model of the radial magnetic circuit, and obtain the distribution curve of the air gap magnetic flux density of the radial magnetic circuit.

[0055] According to the distribution curve of the air gap magnetic flux density of the circumferential magnetic circuit, calculate the average value B of the air gap magnetic flux density of the circumfe...

specific Embodiment 3

[0061] Taking the radial magnetic field permanent magnet motor as an example, establish a three-dimensional solid model of the motor. In order to reduce the amount of calculation, only a pair of magnetic pole models are established, and the boundary conditions, material properties and magnetization direction are set. Using finite element software, such as ANSYS, MAXWELL, COMSOL, FEKO, etc. solve the electromagnetic field, and process the three-dimensional magnetic field calculation results along the circumferential direction and the axial direction respectively. The air gap is divided into 4 equal parts and the average value is taken, so as to obtain the magnetic flux density distribution curve of the circumferential magnetic circuit air gap and Radial magnetic circuit air gap magnetic flux density distribution curve.

[0062] According to the distribution curve of the air gap magnetic flux density of the circumferential magnetic circuit, calculate the average value B of the ai...

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Abstract

The invention relates to a method for computing the air gap flux density of a permanent magnet motor and belongs to the technical field of motors. The method comprises the steps of establishing a circumferential magnetic circuit computational model and a radial magnetic circuit computational model according to a permanent magnet motor physical model, carrying out electromagnetic field solving on the air-gap field of the circumferential magnetic circuit of the permanent magnet motor and on the air-gap field of the radial magnetic circuit of the permanent magnet motor to obtain a circumferential magnetic circuit air gap flux density distribution curve and a radial magnetic circuit air gap flux density distribution curve, introducing a circumferential weight number and a radial weight number, and computing the air gap flux density of the permanent magnet motor by means of the circumferential weight number and the radial weight number. The method for computing the air gap flux density of the permanent magnet motor is not limited by the structural style and the size of the motor, accurate in computation, and suitable for design and analysis of the permanent magnet motor.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a method for calculating the air gap magnetic flux density of a permanent magnet motor. Background technique [0002] Permanent magnet motors are widely used in various fields of industry and agriculture, and designing a motor that meets performance requirements is a basic requirement for designers. Air-gap flux density is one of the most important parameters in the electromagnetic design of permanent magnet motors. Accurate calculation of air-gap flux density can not only improve the design efficiency of permanent magnet motors, reduce the number of trial production, but also reduce design and manufacturing costs. [0003] At present, the main method for calculating the air gap magnetic flux density is the equivalent magnetic circuit method. The algorithm is simple, but many design coefficients need to rely on empirical values, and the accuracy is not high. The key to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 高庆嘉白越宫勋孙强
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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