摘  要：在实际的系统中长初级永磁同步直线电机绕组常采用分段供电的方式驱动。但交替的初级绕组产生了较大的速度波动，严重影响电机的可控性。为此提出一种连续定子（端部绕组交叠）的分段方法，并将环形绕组应用到永磁同步直线电机的分段中。通过对d-q数学模型下电磁推力的解析分析可知，由于初级绕组的开断，电机磁路不再对称， d轴和q轴之间产生了磁耦合；环形绕组谐波磁场影响电机性能，由空载反电动势的谐波分析来认识环形绕组的谐波分布特点，最后采用二维有限元分析对环形绕组电机进行了优化。该种电机电枢可以实现任意长度的分段，并且具有良好的段间运行特性。
关键词：磁耦合；交叠区；环形绕组

Abstract: The long primary armature permanent magnet linear synchronous motor(PMLSM)is generally divided into segments for longdistance system.However,the subrogation of primaries brings serious velocity fluctuation and influences the controllability of the motor.In this paper,proposed a new method（form overlap of two-stage windings）to section the primary armature and applyied new ring windings to linear motor.Described the calculation of the motor performance using analytical and two-dimensional finite-element methods.Taken divided windings in to account,expression of the thrust is derived by d-q model;The magnetic circle exhibits modification;magnetic coupling occurs between d axis and q axis.And then,the analysis on the winding’s harmonic and its effect was stated by this paper.Finally optimize the parameters of the motor to decrease the tooth harmonic wave and the low order number harmonic wave.The main advantage of this system is to section the primary armature of any length.The result shows that the stable thrust can be achieved well if the design is appropriate.
Key Words: Magnetic coupling;Overlap;Ring wingdings