scholarly journals Magnetic field analysis of Primary Permanent Magnet Linear Motor Based on Halbach Distribution

2020 ◽  
Vol 204 ◽  
pp. 02012
Author(s):  
Xiuping Wang ◽  
Yan Li ◽  
Chuhan Yang ◽  
Chunyu Qu
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Technical Problem ◽  
Linear Motor ◽  
Air Gap ◽  
Field Analysis ◽  
Transit System ◽  
Finite Element Software ◽  
Magnetic Field Analysis ◽  
Air Gap Magnetic Field

The rail transit system driven by linear motor has outstanding advantages in climbing ability, traction performance, vibration and noise. However, with the increase of traffic travel and other situations, how to ensure that the linear motor still has a large thrust and stability in the air gap condition is the key technical problem. In order to solve this problem, three Halbach permanent magnet array structures are proposed and applied to the magnetic barrier coupled primary permanent magnet unilateral excitation linear motor (MBCPPMUELM). The finite element software is used for simulation and analysis. By comparing the harmonic distribution of air gap magnetic field of the three Halbach permanent magnet array motors, a topology structure with high magnetic field modulation effect is obtained It provides a useful reference for the further design and analysis of this kind of motor.

Permanent Magnets Design and Magnetic Field Analysis of a Novel Permanent Magnet Linear Motor

2012 ◽  
Vol 569 ◽  
pp. 356-362
Author(s):  
Gong Zhang ◽  
Zhan Gong Xie ◽  
Xian Shuai Chen ◽  
Xue Feng Zhou
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Permanent Magnets ◽  
Linear Motor ◽  
Field Analysis ◽  
Air Gaps ◽  
Magnetic Field Analysis ◽  
Output Force ◽  
Array Structures ◽  
Permanent Magnet Linear Motor

In order to improve the output force characteristics of permanent magnet linear motor (PMLM), studied from permanent magnets (PMs) structure that is the key component of PMLM, different magnetization methods of single PM and different array structures of multiple PMs are compared, and a novel PMLM magnetized alone the external field force lines using 8 pieces tegular Halbach magnet array with air gaps is proposed as well. The analysis on magnetic field of PMLM shows that the force between the coil and the single PM increases by more than 40%, and the average magnetic induction in coil centre generated by the 8 pieces Halbach magnet array arrives at the maximum value, 10% higher than that of 1 piece structure.

Electromagnetic Performance Analysis of Claw-Pole Alternator with Changing Permeance

2013 ◽  
Vol 668 ◽  
pp. 510-513
Author(s):  
Xiao Hua Bao ◽  
Mou Zhi Liu
Keyword(s):  
Magnetic Field ◽  
High Speed ◽  
Noise Analysis ◽  
Calculation Model ◽  
Air Gap ◽  
Field Analysis ◽  
Electromagnetic Properties ◽  
Magnetic Field Analysis ◽  
Field Distortion ◽  
Air Gap Magnetic Field

A changing air gap permeance model of the alternator and its influence were discussed in this paper. When the alternator was under high-speed operation, taking it into consideration that the claws getting deformation for rotating centrifugal force and electromagnetic exciting force, the alternator’s changing air gap permeance model was established. And the alternator’s Maxwell3D calculation model was built. The field magnetic distribution under the rated speed was obtained as well, also before the claws’ deformation was obtained. The harmonics of the air-gap flux were analyzed and compared. The changing air gap permeance model was proved to be reasonable. It would lead to air-gap magnetic field distortion of the generator, which affected the generator’s electromagnetic properties. Instruction was provided for more precise of air gap magnetic field analysis or vibration noise analysis of alternator.

Comparative study of thrust of U-shaped ironless permanent magnet synchronous linear motor based on analytical method and finite element analysis

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1091-1101
Author(s):  
Zhihui Yang ◽  
Ren Liu ◽  
Bin Xia
Keyword(s):  
Magnetic Field ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Permanent Magnet ◽  
Edge Effect ◽  
Three Dimensional ◽  
Linear Motor ◽  
Air Gap ◽  
Element Analysis ◽  
Air Gap Magnetic Field

Due to the large transverse edge effect for U-shaped ironless permanent magnet synchronous linear motor affect the distribution of air gap magnetic field is large, it will reduce the no-load back electromotive force and thrust. This paper proposes a novel method to evaluate the effect of transverse edge effect based on Kriging surrogate model. By comparing the results of the two-dimensional and three-dimensional finite element analysis of the air gap magnetic field of the motor, it can be seen transverse length of the motor, air gap height and thickness of the permanent magnet are the main influencing factors.

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