基于变指数趋近律的永磁同步电机滑模控制

为了提升永磁同步电机(PMSM)调速系统的动态品质,提出了一种基于新型变指数趋近律的滑模速度控制算法。基于传统指数趋近律,引入了变指数函数和双曲正切函数,提高了系统趋近速度自适应调节能力和抖振抑制能力。基于新型变指数趋近律,设计了PMSM滑模速度控制器。通过与传统指数趋近律滑模控制算法、PI控制算法对比,仿真试验结果表明,新型滑模速度控制器具有较好的速度跟踪精度和抗扰动能力。

Sliding Mode Control of Permanent Magnet Synchronous Motor Based on Variable Exponential Reaching Law

In order to improve the dynamic quality of permanent magnet synchronous motor (PMSM) speed regulation system, a novel sliding mode speed control algorithm based on variable exponential reaching law is proposed. Based on conventional exponential reaching law, variable exponential function and hyperbolic tangent function are introduced to improve the system adaptive adjustment ability of sliding mode approaching speed and suppress chattering effectively. Based on the novel variable exponential reaching law, the sliding mode speed controller of PMSM is designed. Simulation results show that, compared with conventional sliding mode speed controller and PI controller, the novel sliding mode speed controller can effectively improve speed tracking accuracy and anti disturbance capability.