| Asynchronous Magnetic Coupling(AMC) is a new type of transmission mechanism. Non-contact connection of internal and external rotor can be realized using the principle of electromagnetic induction. It has the advantages of without friction, low noise and non-pollution. Speed and torque can be transmitted efficiently.Background meaning of magnetic coupling is introduced in this paper. Advantages of magnetic coupling are summarized through comparison analysis of hydraulic coupling and frequency converter. Research status of magnetic coupling is described in detail. The problem and disadvantage of magnetic coupling are summarized at present.AMC that can realize adjustable speed is proposed in this background.Basic structure, working principle and adjustable speed principle of AMC are introduced in detail in this paper. Based on the operation mechanism of AMC,mathematical model of temperature field is established and is solved through variation principle. Temperature field is simulated in finite element through software of Maxwell and ANSYS Workbench. Simulation and theoretical results are compared to analyze to verify the correctness of mathematical model of temperature field of AMC.Induction current of squirrel cage and mathematical model of electromagnetic torque are established based on electromagnetic induction principle and type of energy flow. Theoretical value of parameters in AMC is confirmed depend on parameters solving method of asynchronous motor. Dynamic adjustable speed of AMC is simulated through software of Maxwell.Maximum temperature point and temperature value are confirmed during adjustable speed of AMC. Based on saturation condition of magnetic flux density of cage rotor,optimum adjustable speed area is confirmed of AMC.Curves of theory and simulation of induction current of squirrel cage and electromagnetic torque are analyzed through comparison to verify the correctness of induction current of squirrel cage and mathematical model of electromagnetic torque.Based on ventilation principle of centrifugal fan, structure of cooling system of AMC is designed and internal flow field is analyzed through finite element.Calculated process of FLUENT is elaborated to obtain results of internal flow field of AMC. Feasibility of structure design of cooling system of AMC is proved.Based on the range of saturation region of magnetic circuit of squirrel cage rotor,heat emission holes of squirrel cage rotor are optimized.Rationality of structure optimization is proved through comparative analysis of results of simulation. Finally, using experimental prototype to make experimental measurement and verification to proved the correctness of mathematical model and finite element model of AMC in this paper. |
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