基于双ESO无电流传感器的永磁同步电机驱动系统磁场定向控制

摘要：针对无任何相电流传感器的三相永磁同步电机（PMSM）驱动系统， 提出了一种新颖的基于双扩张状态观测器（ESO）无电流传感器的磁场定向控制（FOC）策略。 一般需要两个相电流传感器以进行电流反馈实现高精度控制， 为此创建了两个ESO来替代实际电流传感器。 第一个ESO用于提供q轴定子电流基准值； 考虑到定子电阻和电感变化， 第二个ESO用于估计实时d轴和q轴定子电流。 所创建的双ESO能够快速和精确地估计实际定子三相电流， 所设计的基于双ESO无电流传感器的FOC策略能够使PMSM驱动系统具有良好的控制性能和较强的鲁棒性。 仿真实验验证了所提方法的可行性和有效性。
Abstract： A novel double extended state observers (ESOs)-based field-oriented control (FOC) strategy is developed for three-phase permanent magnet synchronous motor (PMSM) drive systems without any phase current sensor. In principle, two current sensors are essential parts of the drive system for implementation of the feedback to achieve high accuracy control. For this purpose, the double ESOs are created to provide feedback stator currents instead of actual current sensors. The first one of the double ESOs is designed to estimate the benchmark value of q-axis stator current, which is a primary premise; While the second is designed to estimate real-time stator currents of d-axis and q-axis simultaneously. The resultant double ESOs can rapidly and accurately give estimation of the actual currents of a-axis, b-axis and c-axis, and the synthesized double ESOs-based FOC strategy for PMSM drive system without any current sensors has satisfactory control performance and strong robustness. Numerical experiments validate the feasibility and effectiveness of the proposed scheme.