Design And Analysis Of Heat Dissipation Of Air-cooled Permanent Magnet Eddy Current Governor

Permanent Magnet Driver(PMD)with its excellent energy-saving ability is widely used in petroleum,chemical and other energy industries.However,the heating effect of eddy current is inevitable,and the high temperature mill inevitably affect its mechanical performance.Therefore,the design and analysis of heat dissipation for PMD is of great significance.In this paper,the multi-field coupled method is used to study the flow field and temperature field of the air-cooled PMD.Then the parameters of the fin are calculated and optimized.Finally,a test platform is built to measure temperature and wind speed.Firstly,the three-dimensional finite element model of magneto-thermo-flow coupling for PMD is established,and its flow rate,heat transfer coefficient and temperature distribution under certain working conditions are studied which takes eddy current as heat source.Then a bidirectional magneto-thermo-flow coupling method is proposed.The bidirectional magneto-thermo-flow coupling process of PMD is studied.Finally,the results of bidirectional coupling are compared with single coupling.The structural parameters of the fin are calculated and analyzed by means of bidirectional coupling.The influence of parameters such as fin shape,fin height,fin space,fin thickness,axial angle and floor thickness on the temperature,heat transfer coefficient and the moment of wind resistance is studied,and the secondary factors are removed.Then,orthogonal experiments are performed to study the order of influences on temperature and the moment of wind resistance of fin axial angle,fin height and fin space.Finally,taking the temperature and the moment of wind resistance as the optimization targets,the structural parameters of the fin are optimized by using game theory,the final parameters of the fim are determined,and the PMD with the optimized fin is simulated whose results are compared with those before optimization.The experimental platform of the air-cooled PMD is set up.The temperature and wind speed of the PMD are measured by infrared radiation thermometer and hot wire anemometer.The results of the test are compared with the single and bidirectional coupling under the same conditions to verify the accuracy of two-way coupling method.