Study on a high thrust force bi-double-sided permanent magnet linear synchronous motor

Abstract

A high thrust force bi-double-sided permanent magnet linear synchronous motor used in gantry-type five-axis machining center is designed and its performance was tested in this article. This motor is the subproject of Chinese National Science and Technology Major Project named as ''development of domestic large thrust linear motor used in high-speed gantry-type five-axis machining center project'' jointly participated by enterprises and universities. According to the requirement of the application environment and motor performance parameters, the linear motor's basic dimensions, form of windings, and magnet arrangement are preliminarily specified through theoretical analysis and calculation. To verify the correctness of the result of the calculation, the finite element model of the motor is established. The static and dynamic characteristics of the motor are studied and analyzed through the finite element method, and the initial scheme is revised. The prototype of the motor is manufactured based on the final revised structure parameters, and the performance of the motor is fully tested using the evaluation platform for direct-drive motor component. Experimental test results meet the design requirements and show the effectiveness of design method and process.

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“…Professor Laithwaite from UK and his research team achieved outstanding results in both theory exploration and prototype development of linear induction motor [4]. With the emergence of high-performance permanent magnet material and the improvement of electronic control technology after 1980, the linear motor entered into a rapid development phase, during which linear motors of different structures, different motivational patterns and different working principles came into being [5][6][7][8][9][10].…”