Permanent magnet linear synchronous motor with high air-gap flux density for transportation

2012 ◽  
Vol 39 (1-4) ◽  
pp. 997-1003 ◽  
Author(s):  
Mitusnobu Terata ◽  
Nobuo Fujii
Keyword(s):  
Permanent Magnet ◽  
Flux Density ◽  
Synchronous Motor ◽  
Air Gap ◽  
Linear Synchronous Motor

The Design Method for Actuators with Field Magnets of Dual Halbach Arrays

2013 ◽  
Vol 416-417 ◽  
pp. 227-232
Author(s):  
Mimpei Morishita ◽  
Takayuki Fukuda
Keyword(s):  
Permanent Magnet ◽  
Magnetic Circuit ◽  
Design Method ◽  
Algebraic Approach ◽  
Synchronous Motor ◽  
Air Gap ◽  
Linear Synchronous Motor ◽  
Halbach Arrays

The proposed magnetic circuit precisely evaluates magnetic fluxes between the field magnets of dual Halbach arrays. In the case that an actuator is configured with the dual Halback arrays and the armature coils between them, the air gap length between the dual Halbach arrays gives the maximum number of interlinkage magnetic fluxes with the armature coil through algebraic approach. The new design method is on the basis of the proposed magnetic circuit. This method makes it clear that the air gap length should be more than 1.2 times longer than the permanent magnet poles length. The utility of this design method is verified through designing cylindrical linear synchronous motor provided with the dual Halbach arrays.

Tubular Permanent Magnet Linear Synchronous Motor Thrust Fluctuation Optimization

2011 ◽  
Vol 383-390 ◽  
pp. 5621-5625
Author(s):  
Jing Hong Zhao ◽  
Jun Hong Zhang
Keyword(s):  
Optimal Design ◽  
Theoretical Analysis ◽  
Permanent Magnet ◽  
Flux Density ◽  
Density Wave ◽  
Synchronous Motor ◽  
Linear Motor ◽  
Linear Synchronous Motor ◽  
Practical Engineering ◽  
Thrust Fluctuation

The thrust fluctuation optimal design of the tubular permanent magnet linear synchronous motor is the key to sinusoidal flux density wave degree in theoretical analysis. And the paper analyses the law of different parameters on the flux density waveform. The axial magnetized linear motor is optimized. The measures which inhibited thrust fluctuation is obtained. It has guidance action in motor designing. It has practical engineering value.

A novel analytical calculation of magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping

2020 ◽  
pp. 1-15
Author(s):  
Jianqi Li ◽  
Yu Zhou ◽  
Jianying Li
Keyword(s):  
Magnetic Field ◽  
Conformal Mapping ◽  
Permanent Magnet ◽  
Flux Density ◽  
Analytical Method ◽  
Electromotive Force ◽  
Analytical Calculation ◽  
Air Gap ◽  
Permanent Magnet Machines ◽  
Peak Value

This paper presented a novel analytical method for calculating magnetic field in the slotted air gap of spoke-type permanent-magnet machines using conformal mapping. Firstly, flux density without slots and complex relative air-gap permeance of slotted air gap are derived from conformal transformation separately. Secondly, they are combined in order to obtain normalized flux density taking account into the slots effect. The finite element (FE) results confirmed the validity of the analytical method for predicting magnetic field and back electromotive force (BEMF) in the slotted air gap of spoke-type permanent-magnet machines. In comparison with FE result, the analytical solution yields higher peak value of cogging torque.

scholarly journals Design of a New 1D Halbach Magnet Array with Good Sinusoidal Magnetic Field by Analyzing the Curved Surface

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2522
Author(s):  
Guangdou Liu ◽  
Shiqin Hou ◽  
Xingping Xu ◽  
Wensheng Xiao
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Permanent Magnet ◽  
Flux Density ◽  
Permanent Magnets ◽  
Air Gap ◽  
Curved Surface ◽  
Magnetic Flux Density ◽  
Sinusoidal Magnetic Field ◽  
The Magnetic Field

In the linear and planar motors, the 1D Halbach magnet array is extensively used. The sinusoidal property of the magnetic field deteriorates by analyzing the magnetic field at a small air gap. Therefore, a new 1D Halbach magnet array is proposed, in which the permanent magnet with a curved surface is applied. Based on the superposition of principle and Fourier series, the magnetic flux density distribution is derived. The optimized curved surface is obtained and fitted by a polynomial. The sinusoidal magnetic field is verified by comparing it with the magnetic flux density of the finite element model. Through the analysis of different dimensions of the permanent magnet array, the optimization result has good applicability. The force ripple can be significantly reduced by the new magnet array. The effect on the mass and air gap is investigated compared with a conventional magnet array with rectangular permanent magnets. In conclusion, the new magnet array design has the scalability to be extended to various sizes of motor and is especially suitable for small air gap applications.

scholarly journals Electromagnetic Design of Toroidal Permanent Magnet Linear Synchronous Motor

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Yinhao Mao ◽  
Zhaolong Sun ◽  
Weichang Zhou ◽  
Zhexin Zhuang ◽  
Hanning Qian
Keyword(s):  
Permanent Magnet ◽  
Synchronous Motor ◽  
Electromagnetic Design ◽  
Linear Synchronous Motor

Research on the End Effect Detent Force Reduction of Permanent Magnet Linear Synchronous Motor with Auxiliary Poles One-Piece Structure

2013 ◽  
Vol 416-417 ◽  
pp. 27-32
Author(s):  
He Zhang ◽  
Bao Quan Kou ◽  
Shou Lun Guo ◽  
Hai Lin Zhang ◽  
Yin Xi Jin ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Synchronous Motor ◽  
Linear Motor ◽  
End Effect ◽  
Detent Force ◽  
Linear Synchronous Motor ◽  
Force Reduction ◽  
The One

In order to minimize the detent force of permanent magnet linear synchronous motor (PMLSM) caused by end effect, a novel auxiliary poles one-piece structure is proposed. Two auxiliary poles are extended directly from two ends of the armature core. And magnetic isolation bridges are set between auxiliary pole and armature core. Compared with the conventional discrete auxiliary poles, the one-piece structure will reduce the manufacture difficulty of PMLSM with auxiliary poles and improve the reliability of linear motor.

Sign in / Sign up

Export Citation Format

Share Document