改进型滑模变结构电机控制的脉振电流注入法研究

为了提高永磁同步电机无位置传感器技术的控制性能,在电机动态品质优化的研究中,以滑模变结构控制器替代传统的PI控制器,采用新型趋近律函数改进滑模控制器的输出模型,削弱了传统滑模控制存在的抖振,提高了控制系统的抗干扰能力。在分析无位置传感器技术时,引入高通谐振滤波器,采用具备以高信噪比为特点的两相静止坐标系下高频脉振电流注入法。仿真结果表明,在带高通谐振滤波器的高频脉振电流注入法中运用滑模变结构控制器,提高了转子位置估计的精度,增强了控制系统的鲁棒性。

Research on Pulse Current Injection Method Based onImproved Sliding Variable Structure Mode Motor Control

In order to improve the control performance of position sensorless technology of permanent magnet synchronous motor (PMSM), a sliding variable structure controller mode was used to replace the traditional PI controller, and a new approach law was presented to improve the output of the sliding mode controller model, which had weakened the chattering of the traditional sliding mode control and improved the antiinterference ability of the control system. In the analysis of position sensorless technology, a highfrequency pulse current signal injected in twophase stationary coordinate system was characterized by a high signal to noise ratio owing to the introduction of a highpass resonant filter. The simulation results showed that the application of the sliding mode variable structure controller in the high frequency pulse current injection method with highpass resonant filtering improved the accuracy of the rotor position estimation and enhanced the robustness of the control system.