Optimization ofiron core design for permanent-magnet synchronous machines with three-segment Halbach magnet array
- Publication Type:
- Journal Article
- Dianji yu Kongzhi Xuebao/Electric Machines and Control, 2017, 21 (4), pp. 37 - 43
- Issue Date:
© 2017, Harbin University of Science and Technology Publication. All right reserved. Halbach magnet array and concentrated fractional-slot winding can enhance the output torque, and reduce the ripple torque of permanent magnet synchronous machines (PMSMs) to meet the demands of servo system for rapid response and high precision. However, the iron core needs to be redesigned. By the theory of Halbach, it established a PMSM model with three-segment Halbach magnet array, and analyzed the characteristics of air gap magnetic field to reduce the effects of the harmonic air-gap field and harmonic slot electromotive torque. The structural characteristics of the motor core were analyzed, and multiple critical dimensions for design variables were determined. A double layer optimization model was developed to maximize the electromagnetic torque and minimize the torque ripples. The finite element method was employed to calculate the magnetic field and the Taguchi method to simplify the design process. Finally, a multi-variable and multi-objective optimization process was implemented for design optimization of a servo motor with eight-poles and nine-slots.
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