Analytical calculation of electromagnetic torque for surface mounted permanent magnet brushless motors
With the air gap magnetic field distribution of surface mounted permanent magnet(PM)motors obtained using an analytical technique,the instantaneous electromagnetic torque and its corresponding components are investigated with the Maxwell stress tensor method.Accurate results can easily be achieved using the proposed method without using the tedious finite element analysm(FEA).In this paper,the electromagnetic torque of a surface mounted PM motor with two phases energized is decomposed into four torque components.This technique is useful not only for the design and optimization of the permanent magnet motor,but also for the choice of control strategy.
surface mounted permanent magnet motorsair gap magnetic fieldanalytical techniqueelectromagnetic torque
杜世勤、章跃进、江建中
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School of Electromechanical Engineering and Automation,Shanghai University,Shanghai 200072,P.R.China
surface mounted permanent magnet motors air gap magnetic field analytical technique electromagnetic torque
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