Research on Characteristics of Permanent Magnet Eddy-current Coupling Drive
HE Fujun1, ZHONG Yuhai1, 2, ZHANG Ruijie1, SONG Xuemei1
1. Department of Mechanical Science and Engineering, Northeastern University of Petroleum, Daqing 163318; 2. School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072)
Abstract：The technology of permanent magnet eddy-current coupling drive can achieve softer transmission characteristics by using non-contact transmission mode. There is a very good effect in some special occasions. Permanent magnet eddy-current coupling has the advantages of energy-saving, overload protection, allowing the larger misalignment, simple structure, long service life and so on by using technology of permanent magnet eddy-current coupling drive. The permanent magnet eddy-current coupling of application in the oil field is designed for researching on the characteristics of permanent magnet eddy-current coupling drive. Mathematical model of permanent magnet eddy-current coupling is established by analyzing the theory of the coupling drive. Transmission characteristics of the coupler is simulated by establishing three dimensional finite element model using simulation software Ansoft. The relationship among torque, space and rotation difference is got. Coupling torque increases with the decrease of the gap or the increase of rotation difference. Experimental study on the prototype is done by establishing the coupler drive experimental platform. It verifies that finite element simulation is a research method of transmission characteristics of coupler. And the reasonable work area of coupler can be determined from the experimental result’s curve. Within the working area, the coupler has high efficiency, high starting torque and can buffer the load fluctuation, and shows good driving performance.
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