高频电流注入单绕组无轴承磁通切换电机悬停及启动过程的无径向位移传感器控制  

Radial Displacement Sensorless Control with High Frequency Current Injection of Single-winding Bearingless Flux-switching PM Motor During Standstill and Startup

作　　者：陈垚 周扬忠 CHEN Yao;ZHOU Yangzhong(Fujian Key Laboratory of New Energy Generation and Power Conversion(Fuzhou University),Fuzhou 350112,Fujian Province,China)

机构地区：[1]福建省新能源发电与电能变换重点实验室(福州大学),福建省福州市350112

出　　处：《中国电机工程学报》2023年第8期3204-3216,共13页Proceedings of the CSEE

基　　金：福建省自然科学基金重点项目(2021J02023)。

摘　　要：无轴承电机在悬停及启动过程始终需要保持稳定悬浮,准确获取转子径向位移信息是控制转子稳定悬浮的关键,传感器的使用易受环境影响,降低系统可靠性,并且增加系统成本。针对电机悬停及启动过程,提出一种基于高频电流注入的无径向位移传感器控制方法。首先,基于电机电感数学模型,建立当转矩平面注入高频旋转电流信号后,空间对称绕组中有效高频偏差电势幅值与转子径向位移的关系;接着,利用线性正弦跟踪器提取有效高频偏差电势幅值;然后,基于上述电势幅值与转子径向位移关系,构建转子径向位移观测器;最后,将观测位移与自抗扰控制策略相结合,构建高性能的无径向位移传感器控制策略。理论分析与实验结果验证所提方法的有效性。A bearingless motor needs to keep stable suspension during standstill and startup processes,and accurate information detection of the radial displacement of the rotor is a key for the stable suspension operation.However,sensor applications are sensitive to environments,thus reducing system reliability,and increasing costs.A novel radial displacement sensorless control method with high-frequency current injection for single-winding bearingless flux-switching permanent magnet motor is proposed to address the stable suspension sensorless control during startup.First,based on the mathematical model of inductance,the relationship between the amplitude of the effective high-frequency bias-EMF and rotor radial displacement is established with the high-frequency rotating current injected into the torque plane.The amplitude of the effective high-frequency bias-EMF is extracted by the linear sinusoidal tracker.Thereafter,based on the relationship between the amplitude of the bias-EMF and rotor radial displacement,a rotor radial displacement observer is constructed.Finally,combining the observed displacement with the active disturbance rejection control method,a high-performance control strategy with radial displacement sensorless control strategy is constructed.The theoretical analysis and experimental results verify the validity of the proposed method.

关 键 词：单绕组无轴承磁通切换电机 高频电流注入 线性正弦跟踪器 无径向位移传感器控制 

分 类 号：TM30[电气工程—电机]