低载波比下基于状态反馈和大林算法的永磁同步电机高性能电流控制策略  

High Performance PMSM Current Control Strategy Based on Dahlin Algorithm With State Feedback Control Under Low Carrier Ratio

作　　者：宋志豪 姚文熙[1] 李成敏[1] 杨欢[1] 李武华[1] 何湘宁[1] SONG Zhihao;YAO Wenxi;LI Chengmin;YANG Huan;LI Wuhua;HE Xiangning(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang Province,China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《中国电机工程学报》2024年第14期5725-5735,I0024,共12页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52077197)。

摘　　要：受到功率器件开关频率的限制,高速永磁同步电机驱动系统通常需要低载波比运行,此时系统延时相对很大,对电流环设计要求很高。常规在连续域设计的复矢量PI控制器由于离散化实现存在误差,dq轴解耦不完全,而且扰动传递函数包含电机自身低阻尼比极点,使系统抗干扰能力差,尤其是负基波频率附近的扰动。因此,文中提出状态反馈大林控制算法。首先,利用延时环节电压进行反馈来使系统完全解耦;然后,通过输出电流反馈提升系统阻尼来抑制扰动;最后,对解耦且阻尼后的系统设计大林控制器来提升稳定裕度。实验结果表明,相较于复矢量PI控制器,所提出的状态反馈大林控制器dq轴解耦性能好,电流超调小,系统振荡小,且抗扰能力显著提升。High-speed permanent magnet synchronous motor(PMSM)drive systems typically require low carrier ratio operation due to the limited switching frequency of power devices.As a result,the system delay is relatively high,and thus a high-performance current controller is required.However,due to discretization error,the commonly used complex vector PI controller designed in the continuous domain is unable to fully realize dq-axis decoupling.Additionally,the low damping ratio pole of the PMSM model itself is included in the disturbance transfer function under complex vector PI control,leading to poor anti-disturbance capability,especially for disturbances near negative fundamental frequency.Therefore,the Dahlin algorithm with state feedback control is proposed in this paper.It first uses the voltage of the delay link as feedback to fully decouple the system.Then,the output current feedback is adopted to enlarge system damping and thereby to suppress disturbance.Finally,the Dahlin controller designed for the decoupled and damped system is applied to improve the stability margin.The experimental results validate that the proposed Dahlin controller with feedback control has better dq-axis decoupling performance,smaller current overshoot,lower system oscillation and higher anti-disturbance capability compared to the complex vector PI controller.

关 键 词：高速永磁同步电机 低载波比 状态反馈 大林控制 抗扰能力 

分 类 号：TM351[电气工程—电机]