Analysis of air gap permanent magnet eddy （分析气隙永磁涡流）.pdfVIP

International Journal of Control and Automation Vol. 8, No. 6 (2015), pp. 43-54 /10.14257/ijca.206 Analysis of Air Gap Permanent Magnet Eddy Current Coupling of the Equivalent Magnetic Charge Method Based on Field Qingzhong Gao 1, 2, Dazhi Wang1 and Sheng Lin 1, 2 1College of Information Science and Engineering, Northeastern University, China 2Academy of Automation, Shenyang Institute of Engineering, China gaoqingzhong_xia@163.com Abstract This paper introduces the structure and working principle of permanent magnet eddy current coupling, using the equivalent magnetic charge principle to establish an analytical and mathematical model of permanent magnet eddy current coupling gap magnetic field, to solve the magnetic induction intensity. Changes in the parameters of gap size, the thickness of the magnetic blocks and magnetic block radius are obtained fro m using MATLAB to affect the air gap magnetic flux density’s reflective curves in a single cycle. Through the analysis of the strength of the air gap magnetic induction, it lays the foundation for solving the transfer torque distribution of the eddy current density and magnetic. Keywords: permanent magnet eddy current coupling; equivalent magnetic charge; air gap; magnetic induction intensity 1. Introduction Permanent magnet eddy current coupling has been widely applied in the middle and high-power motor-driven pumps and fans and other equipment [1-5] and the device has characteristics such as high efficiency, low mai