【摘要】 针对无位置传感器的同步磁阻电机(SynRM)控制系统在暂态状态下转子位置预测误差较大、稳定性不强的问题，提出一种基于磁链观测的转子位置预测方法。在SynRM磁链模型的框架下，构建自适应投影矢量(APV)来表示广义位置观测误差，可以得到位置预测误差及由其产生的磁链观测误差之间的动态关系。通过分析系统的不稳定区域设计磁链观测器，有效提升动态性能及鲁棒性。此外，在离线进行电流-磁链模型检测时，针对逆变器非线性以及定子电阻随温升改变而导致的测量误差，提出一种共轭误差消去法(CEE),将作用于磁链的电压表示为矢量的形式，逆变器非线性及定子电阻温升产生的误差为其虚部，将共轭矢量进行平均从而消去电压误差，有效提升电流-磁链模型的检测精度从而使转子位置预测更为精确。在一台0.55 kW的SynRM对拖实验平台上验证所提出的转子位置预测方案的性能及稳定性。更多还原

【Abstract】 A rotor position prediction method based on magnetic flux observation was proposed to address the issues of large rotor position prediction errors and weak stability in the control system of a sensorless synchronous reluctance motor(SynRM) under dynamic conditions. Within the framework of the SynRM flux model, the generalized position estimation error was expressed by an adaptive projection vector(APV). Then, the dynamic model between the position estimation error and the flux observer error can be obtained. By analyzing the unstable region of the system, the flux linkage observer is designed to effectively enhance dynamic performance and robustness. Moreover, the proposed conjugate-error-elimination(CEE) method increases the current-magnetic model detection accuracy by eliminating the error caused by inverter nonlinear and resistance temperature rise which improved the position estimation accuracy effectively. Finally, the performance and stability of the proposed scheme was validated with experiments on a 0.55 kW SynRM drive platform.更多还原