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Journal of Applied Mathematics
Volume 2013 (2013), Article ID 525014, 9 pages
http://dx.doi.org/10.1155/2013/525014
Research Article

Discrete Current Control Strategy of Permanent Magnet Synchronous Motors

1School of Control Science and Engineering of Hebei University of Technology, Tianjin 300130, China
2Hebei University of Science and Technology, Shijiazhuang 050018, China

Received 1 July 2013; Revised 22 September 2013; Accepted 28 September 2013

Academic Editor: Baocang Ding

Copyright © 2013 Yan Dong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A control strategy of permanent magnet synchronous motors (PMSMs), which is different from the traditional vector control (VC) and direct torque control (DTC), is proposed. Firstly, the circular rotating magnetic field is analyzed on the simplified model and discredited into stepping magnetic field. The stepping magnetomotive force will drive the rotor to run as the stepping motor. Secondly, the stator current orientation is used to build the control model instead of rotor flux orientation. Then, the discrete current control strategy is set and adopted in positioning control. Three methods of the strategy are simulated in computer and tested on the experiment platform of PMSM. The control precision is also verified through the experiment.