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Study On The Rare Earth Permanent Magnet Synchronous Motor By FEM

Posted on:2008-06-30Degree:MasterType:Thesis
Country:ChinaCandidate:R FuFull Text:PDF
GTID:2132360212478953Subject:Motor and electrical appliances
Abstract/Summary:PDF Full Text Request
This dissertation develops partial contents of national 863 projects "The High Speed Highly Effective Explosion-proof Rare Earth Permanent Magnet Synchronous Motor". In order to improve the efficiency of rare earth permanent magnet synchronous motor (REPMSM), the paper combined FEM (Finite Element Method) with experiment methods, and studied on the copper losses of rotor of REPMSM in the steady-state, the starting process simulation of REPMSM, and the harmonic in air-gap magnetic field at no-load of REPMSM.The paper has calculated accurately a 22kW REPMSM in oil field for pumping with the FEM software MagNet. At the fist time, the copper losses of rotor in the steady-state of REPMSM because of the harmonic analyzed thoroughly, the direct and indirect method to measure the efficiency of the 22kW REPMSM is disposed for the harmonic losses. Compared the simulation and experiment result, the copper losses of rotor in steady-state of REPMSM existed actually. The idea is different from the traditional theory of REPMSM in the steady-state.The starting process simulation for the 22kW of the REPMSM with the FEM software of the MagNet is searched deeply. And the starting process experiment at no-load is completed, the measurement result proved the exactness of the simulation results. Simultaneously, the simulation result by the MagNet provided the reference to optimize REPMSM.The air-gap magnetic field at no-load of 370W REPMSM has simulated by the FEM software MagNet, the simulation results of THD (Total Harmonic Distortion) of back electromotive force at no-load was 6.23%. In order to prove the result of simulation, two 370W REPMSM had towed each other, the measurement results of THD was 3.26%.The damping effect to air gap harmonic was found by the rotor squirrel-cage bar.
Keywords/Search Tags:Rare Earth Permanent Magnet Synchronous Motor (REPMSM), Finite Element Method (FEM), Copper Losses of Rotor, Starting Performance, Harmonic
PDF Full Text Request
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