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The Influence of Second Air-Gap Length on the Performance of 10 kV, 1000 kW Permanent Magnet Synchronous Motor

Author(s):

Xianghong Cao, Yanan Xu*, Junfeng Sun and Honbo Qiu   Pages 1 - 8 ( 8 )

Abstract:


Background: The influence of the second air-gap length on the performance of permanent magnet synchronous motor is usually ignored. A comparative analysis is made of line-start high-voltage permanent magnet synchronous motor in this paper.

Objective: The purpose of this paper is to analyze the influence of the second air-gap length on the motor performance.

Methods: A 10kV 1000kW permanent magnet synchronous motor is taken as an example and the model is established based on the finite element calculation method when the second air-gap length is different. The influence of the second air-gap length on the phasor diagram, no-load back electrodynamic force, starting performance and steady-state operation performance are studied. Based on the finite element calculation method, the torque angle, current, power factor, external power factor and d/q-axis current of the motor are analyzed, and the change of the motor phasor diagram is obtained. The influence of the second air-gap length on the no-load back electrodynamic force is studied.

Results and Conclusion: The relationship between the no-load back electrodynamic force and the no-load air-gap fundamental magnetic field is determined, and the influence mechanism of the no-load air-gap fundamental magnetic field on no-load back electrodynamic force is revealed. Furthermore, the influence of the no-load back electrodynamic force on the starting performance is studied. Finally, the influence of the second air-gap length on the 10kV 1000kW permanent magnet synchronous motor steady-state performance is obtained. Based on the above analysis, some references are given for the design of motor.

Keywords:

LS-HV-PMSM; second air-gap length; phasor diagram; no-load back EMF; starting performance; steady-state performance

Affiliation:

College of Building Environmental Engineering, Zhengzhou University of Light Industry, Zhengzhou; Henan, College of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou; Henan, China Tobacco Guangxi Industrial Co., Ltd.Main, Guangxi, College of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou; Henan



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