一种改进的PMSM高频方波注入无位置检测方法  

An Improved Positionless Detection Method of PMSM Based on High Frequency Square Wave Injection

作　　者：彭思齐[1] 蒋雨函 李凡 PENG Si-qi;JIANG Yu-han;LI Fan(School of Automation and Electronic Information,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学自动化与电子信息学院,湖南湘潭411105

出　　处：《控制工程》2022年第11期2125-2130,共6页Control Engineering of China

摘　　要：针对内置式永磁同步电机(IPMSM)无位置传感器控制的低速域转子位置检测,提出了一种基于无滤波器高频方波电流注入结合正切锁相环的低速域无位置传感器控制的新方法。通过在估计的同步旋转坐标系的直轴上注入高频方波电流信号,提取交直轴电流环在静止坐标系中的输出电压量,通过积分离散化的方法提取带有转子位置信息的信号,省去了滤波器的使用。采用正切锁相环对转子位置进行估计。所提方法结构简单,易于实现,无需设计低通滤波器,通过搭建仿真模型验证了所提方法在变速运行和突加负载两种工况下都具有良好的稳定性。For the position detection of the rotor in low speed domain of interior permanent magnet synchronous motor(IPMSM) without position sensor control, a new method based on filterless high frequency square wave current injection combined with tangent phase-locked loop in low-speed domain sensorless control is proposed. By injecting a high-frequency square wave current on the straight axis of the estimated synchronous rotating coordinate system, the output voltage of the current loop of the orthogonal and straight axis in the stationary coordinate system is extracted, and the signal with the rotor position information is extracted by the method of integral discretization, so the need for filters is eliminated. The tangent phase-locked loop is used to estimate rotor position. The proposed method is simple in structure, easy to implement, and does not need to design a low-pass filter. By building a simulation model, it is verified that the proposed method has good stability under both variable speed operation and sudden load conditions.

关 键 词：内置式永磁同步电机 高频方波电流注入 正切锁相环 无滤波器 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]