单边直线感应电机转子磁场定向矢量控制方法研究

Research of Rotor Flux Oriented Vector Control in Single Linear Induction Motor

单边直线感应电机运行中因次级板产生涡流而存在第二类纵向边缘效应,造成气隙有效磁通和牵引力系数降低。建立了电机d-q轴等效电路,通过d轴互感和电阻变化来反应边缘效应的影响。采用转子磁链、速度和电流3个调节器,对uds,uqs,iqs进行在线解耦补偿控制。结果表明,该方法在电机速度突变时减小了力矩脉动,定子电流过渡平滑,速度平稳,较好地改善了电机的运行性能,对实际分析提供了理论依据。

The LIM has the second longitudinal end effect caused by eddy currents in secondary plate in its operation, which reduces its available magnetic flux of air gap and pull coefficient, It worked out the d-q axis equivalent circuits and indicated the longitudinal end effect through the changes of mutual inductance and resistance in d axis then brought forward uds, uqs, iqs online deeouple compensation basing on the rotor magnetic flux, speed, current regulators, The result indicates that this method can reduce the torque ripple and make the stator currents flat, speed smooth during the sudden change in motor speed, which provides theory guid ance to the SLIM application analysis.