永磁同步电机滑模调速系统新型趋近律控制

基于传统指数趋近律的滑模控制(SMC)系统在永磁同步电机(PMSM)调速系统中应用广泛。但是该算法在SMC系统做趋近运动时,存在明显抖振,控制精度无法应对复杂情况。为了抑制系统抖振,提高PMSM调速系统的动态和稳态性能,在传统指数趋近律的基础上引入加权积分型增益,提出了一种新型趋近律。加权积分型增益的引入使系统在滑动模态阶段滑模面函数和积分结果可以同步趋近于零,从而有效抑制系统抖振。依照所提出的新型趋近律,设计了速度控制器,并应用到PMSM矢量控制系统中。分别利用软件仿真和硬件试验与传统指数趋近律控制进行了比较,验证了所提控制策略的可行性和有效性。

New Reaching Law Control of Permanent Magnet Synchronous MotorSliding Mode Speed Regulation System

The sliding mode control (SMC) system based on the traditional exponential reaching law was widely used in the permanent magnet synchronous motor (PMSM) speed control system. However, this algorithm had obvious buffeting when the SMC system was approaching, and its control precision could not cope with the complicated situation. In order to suppress the system buffeting and improve the dynamic and steadystate performance of the PMSM speed control system, a new reaching law was proposed based on the traditional exponential reaching law by introducing the weighted integral gain. The introduction of the weighted integral gain made the system sliding mode function and its integral result close to zero in the sliding mode, which effectively suppressed system buffeting. According to the proposed new reaching law, the speed controller was designed and applied to the PMSM vector control system. The new reaching law control strategy was compared with the traditional exponential reaching law control strategy in software simulation and hardware experiments respectively to verify the feasibility and effectiveness of the proposed control strategy.