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Radial suspension force model of bearingless permanent magnet slice motor based on coordinate system of rotor eccentricity(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2016年04
Page:
10-16
Research Field:
Publishing date:

Info

Title:
Radial suspension force model of bearingless permanent magnet slice motor based on coordinate system of rotor eccentricity
Author(s):
SUN Yu-xin QIAN Jian-lin ZHU Huang-qiu ZHANG Wei-yu
 ( School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,China)
Keywords:
bearingless permanent magnet slice motors coordinate system of rotor eccentricity Maxwell force radial suspension force finite element method
PACS:
TM 343
DOI:
10. 15938 / j. emc. 2016. 04. 002
Abstract:
For bearingless permanent magnet slice motor ( BPMSM) ,that rotor suspension is not stable in operation. To solve this problem,radial suspension force model was researched as the main factor effecting suspension performance. According to theory of displacement compensation control and concept of angle coordinate system,coordinate system of rotor eccentricity was designed. Based on Maxwell stress tensor method,a radial suspension force model was deduced through integration and trigonometric transformation under the coordinate system. A direct suspension force winding current control system was also designed based on the model. The result is verified by finite element method ( FEM) ,comparing the motor radial suspension force results of FEM and mathematical model calculation.

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Last Update: 2016-06-26