<i>Magnetic field calculation of permanent magnet linear synchronous motor for machine tools</i>

2018 ◽  
Author(s):  
yiyong yin ◽  
shuoqiong liu ◽  
zhaohui wang ◽  
yanchun yao ◽  
wenqiang Zhang
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Machine Tools ◽  
Synchronous Motor ◽  
Field Calculation ◽  
Linear Synchronous Motor

scholarly journals Detent Force Reduction in Permanent Magnet Linear Synchronous Motor Base on Magnetic Field Similarity Method

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 57341-57348 ◽  
Author(s):  
Chunyuan Liu ◽  
Huimin Gao ◽  
Yuansheng Xiong ◽  
Shigui Zhou ◽  
Wenzhen Fu
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Synchronous Motor ◽  
Detent Force ◽  
Linear Synchronous Motor ◽  
Force Reduction ◽  
Similarity Method ◽  
Field Similarity

scholarly journals End Effect Analysis of a Slot-Less Long-Stator Permanent Magnet Linear Synchronous Motor

Symmetry ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1939
Author(s):  
Yue Zhou ◽  
Wenjun Zong ◽  
Qiang Tan ◽  
Zhenjiang Hu ◽  
Tao Sun ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Synchronous Motor ◽  
End Effect ◽  
Flux Linkage ◽  
Effect Analysis ◽  
Linear Synchronous Motor ◽  
Primary Origin ◽  
Left And Right ◽  
Air Gap Magnetic Field

The implications of the end effect for flux linkage and thrust ripple in a slot-less long-stator permanent magnet linear synchronous motor (LSPMLSM), are analyzed in this paper. Since it is affected by the end effect, the air-gap magnetic field density under the end permanent magnet is different from that under the non-end permanent magnet, leading to asymmetry in the thrust ripple. For this reason, we establish a dynamic permanent magnet flux linkage model, which proves that the end effect leads to sub-harmonics in the permanent magnet flux linkage. The motor’s magnetic field distribution in the left and right parts is symmetrical. A thrust model taking into account the flux linkage sub-harmonics is established, from which the amplitude and period of the thrust ripple caused by the end effect can be calculated. There is no detent force for the slot-less LSPMLSM, and the end effect is the primary origin of the motor thrust ripple. In order to suppress the end effect, a method of increasing the end iron length is proposed, as a result of which the sub-harmonics in the flux linkage and the motor thrust ripple are effectively suppressed. Experimental and simulation results verify the results of this paper.

Starting Performance of Novel Magnet Arrayed Permanent Magnet Synchronous Motor

2011 ◽  
Vol 383-390 ◽  
pp. 835-839
Author(s):  
Yue Jun An ◽  
Hong Liang Wen ◽  
Wen Qiang Zhao ◽  
Guo Ming Liu ◽  
Zhao Jun Meng
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Sine Wave ◽  
Synchronous Motor ◽  
Air Gap ◽  
Iron Core ◽  
Field Calculation ◽  
Air Gap Magnetic Field ◽  
Magnetic Poles

In order to improve the sinusoidal level of air gap magnetic field of the traditional surface PMSM, reduce its harmonic losses and fully reflect its energy-saving advantages, this paper introduces a type of sinusoidal pole width modulation permanent magnet synchronous motor. The surface magnetic poles of the rotor iron core constitute by a number of small array magnets, which makes the air gap magnetic field more sinusoidal. Placing starting winding in remaining space between array magnets of rotor outer surface to make surface-mounted permanent magnet synchronous motor add self-starting function. The sine wave distortion rate of air gap magnetic field of sinusoidal pole width modulation structure was compared with traditional surface-mounted structure by electromagnetic field calculation and experiment. The copper starting winding and aluminum starting winding were placed in sinusoidal pole width modulation structure motor respectively, and then the paper analyzes dynamic torque and rotational speed of self-starting progress. Finally the analysis is verified by experiments.

Characteristic and Magnetic Field Analysis of a Novel Ironless Halbach Permanent Magnet Linear Synchronous Motor

2013 ◽  
Vol 416-417 ◽  
pp. 149-155
Author(s):  
Lu Zhang ◽  
Bao Quan Kou ◽  
Bin Chao Zhao ◽  
Feng Xing
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Synchronous Motor ◽  
Field Analysis ◽  
Magnetic Flux Density ◽  
Linear Synchronous Motor ◽  
Halbach Array ◽  
Magnetic Field Analysis ◽  
Magnetization Intensity ◽  
Flux Density Distribution

This paper proposes an ironless permanent magnet linear synchronous motor (ILPMLSM) with a novel Halbach array. The magnetic flux density distribution of the Halbach array is solved analytically by using the equivalent magnetization intensity method. The expressions of no-load back-EMF and electromagnetic thrust are obtained. All of the results are verified by finite element method and they are coincide very well.

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