矢量控制系统的关键在于能否实现对磁链的准确定位。为此，针对传统的电压、电流型磁链观测器各自的优缺点和适用范围，提出了一种电压电流组合型磁链观测器。通过比例积分控制实现电压、电流模型的平滑切换。采用梯形法对该组合磁链模型进行离散化处理，实现了感应电机矢量控制系统的数字化。搭建基于DSP28055的物理试验平台，试验结果表明了该方法的有效性，验证了该组合模型在感应电机矢量控制系统中的可行性和优越性。

The key of vector control system is whether the flux linkage can be accurately positioned. Taking the advantages and disadvantages of traditional voltage- and current-model flux observers and their application scope into consideration, a voltage and current combined flux observer is proposed. Smooth switching between voltage and current models is achieved through proportional integral control. The trapezoidal method is used to discretize the combined flux model, which realizes the digitization of the vector control system of induction motor. The physical experiment platform based on DSP28055 is built. The experimental results show the effectiveness of the method and the feasibility and superiority of the combined flux model in induction motor vector control system.

国家自然科学基金青年基金项目(51607151);四川省创新创业项目(S201916015055)