Permanent magnet type motor modeling and demagnetization performance analysis method of asymmetric magnetic network

An analysis method and asymmetric technology, applied in the field of demagnetization performance analysis of permanent magnet motors, can solve problems such as poor accuracy of calculation results, inability to consider partial demagnetization of permanent magnets, and inability to analyze motor demagnetization performance, so as to save time and improve Effect of Initial Design Efficiency

Active Publication Date: 2018-09-14
JIANGSU UNIV
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  • Description
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Problems solved by technology

A demagnetization detection method for a permanent magnet brushless DC motor and a demagnetization detection device for a permanent magnet brushless DC motor are proposed in the literature with the Chinese patent application number 201510450719.X, the purpose of which is to propose a new permanent magnet The demagnetization detection scheme of the brushless DC motor solves the problem that it is difficult to detect whether the permanent magnet brushless DC motor is demagnetized, but it only detects and evaluates the demagnetization performance of the motor after the motor design is completed, and does not involve the study of the demagnetization performance of the motor. Does not...

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  • Permanent magnet type motor modeling and demagnetization performance analysis method of asymmetric magnetic network
  • Permanent magnet type motor modeling and demagnetization performance analysis method of asymmetric magnetic network
  • Permanent magnet type motor modeling and demagnetization performance analysis method of asymmetric magnetic network

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Embodiment Construction

[0033] In order to illustrate the present invention more intuitively, with figure 1 The stator permanent magnet flux switching motor shown is taken as an example. The stator permanent magnet flux switching motor includes an outer rotor and an inner stator. The outer rotor is composed of a rotor yoke 1 and rotor teeth 2, and the inner stator is composed of a stator yoke 6 and a stator Composed of 5 teeth, a permanent magnet 3 is fixedly embedded in the stator tooth 5, the outer diameter of the permanent magnet 3 is the same as that of the stator tooth 5, and the armature winding 4 is wound on the stator tooth 5, and the connection between the rotor tooth 2 and the stator tooth 5 Radial air gap between.

[0034] As the motor position changes, there are two types of permeance: fixed and non-fixed permeance. The fixed magnetic permeability part is only related to the motor structure, parameter size and its own magnetic permeability, and the connection mode of the corresponding ma...

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Abstract

The invention discloses a permanent magnet type motor modeling and demagnetization performance analysis method of an asymmetric magnetic network. The permanent magnet type motor modeling and demagnetization performance analysis method of an asymmetric magnetic network includes the steps: connecting a fixed permeance network model, an air gap permeance network model and a permanent magnet permeancenetwork model in series and in parallel according to corresponding positional relationships so as to be synthesized into a permeance network model of the entire motor; listing a node magnetic potential equation of the permeance network model of the whole motor, obtaining the magnetic flux of the permanent magnet through calculation according to a node magnetic pressure equation, and obtaining themagnetic density of any point of the permanent magnet through calculation; and determining demagnetization by comparing the magnetic density of the permanent magnet B(x) with the magnetic density B(X0) at the knee point X0 of the demagnetization B-H curve of the permanent magnet. Therefore, the permanent magnet type motor modeling and demagnetization performance analysis method of an asymmetric magnetic network can accurately analyze the demagnetization situation of the motor, can save the time, and can improve the design efficiency.

Description

technical field [0001] The invention relates to the field of motors, in particular to a method for analyzing the demagnetization performance of a permanent magnet motor. Background technique [0002] Permanent magnet motors are the main components of electric vehicles. Compared with electric excitation motors, permanent magnet motors use permanent magnets to generate magnetic fields. There is no electric excitation device, no excitation loss, simplified structure, and simple operation and maintenance. Permanent magnet motors use less permanent magnet materials to generate sufficient magnetic fields, are small in size, light in weight, high in power and high torque density, and have a wide range of constant power speed regulation. The air-gap magnetic field of the permanent magnet motor is generated by the permanent magnet. Due to its inherent characteristics, the permanent magnet material can establish a magnetic field in its surrounding space without additional energy after...

Claims

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Application Information

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IPC IPC(8): H02K15/00G06F17/50
CPCG06F30/17H02K15/00
Inventor 朱孝勇简彦洪樊德阳项子旋杨敏健全力
Owner JIANGSU UNIV
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