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Appl. Sci. 2017, 7(1), 98; doi:10.3390/app7010098

A Real-Time Computation Model of the Electromagnetic Force and Torque for a Maglev Planar Motor with the Concentric Winding

1
School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
2
Faculty of Technology, Policy and Management (TPM), Delft University of Technology, Delft 2628 BX, The Netherlands
*
Author to whom correspondence should be addressed.
Academic Editor: Wen-Hsiang Hsieh
Received: 4 October 2016 / Revised: 12 December 2016 / Accepted: 12 January 2017 / Published: 20 January 2017
View Full-Text   |   Download PDF [3429 KB, uploaded 20 January 2017]   |  

Abstract

The traditional model of the electromagnetic force and torque does not take the coil corners into account, which is the major cause for the motor fluctuation. To reduce the fluctuation, a more accurate real-time computation model, which considers the influence of the coil corners, is proposed in this paper. Three coordinate systems respectively for the stator, the mover, and the corner are established. The first harmonic of the magnetic flux density distribution of a Halbach magnet array is taken into account in this model. The coil is divided into the straight coil segment and the corner coil segment based on its structure. For the straight coil segment, the traditional Lorenz force method can be used to compute its electromagnetic force and torque, which is a function of the mover position. For the corner coil segment, however, the numerical calculation method can be used to get its respective electromagnetic force and torque. Based on the above separate analysis, an electromagnetic model can be derived, which is suitable for practical application. Compared with the well-known harmonic model, the proposed real-time computation model is found to have less model inaccuracy. Additionally, the real-time ability of the maglev planar motor model and the decoupling computation is validated by NI PXI platform (Austin, TX, USA). View Full-Text
Keywords: concentric winding; maglev planar motor; real-time computation model; numerical calculation concentric winding; maglev planar motor; real-time computation model; numerical calculation
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MDPI and ACS Style

Kou, B.; Xing, F.; Zhang, L.; Zhang, C.; Zhou, Y. A Real-Time Computation Model of the Electromagnetic Force and Torque for a Maglev Planar Motor with the Concentric Winding. Appl. Sci. 2017, 7, 98.

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