A Robust Two-Degree-of-Freedom Current Control Strategy for LCL-Equipped High-Speed PMSMs

被引:0
|
作者
Shi, Longhao [1 ]
Cheng, Chenwen [1 ]
Hu, Mingjin [1 ]
Hua, Wei [1 ]
Lu, Chunyu [1 ]
机构
[1] Southeast Univ, Sch Elect Engn, Nanjing 210096, Peoples R China
基金
中国国家自然科学基金;
关键词
Complex vector; discrete time; feedforward; high-speed permanent magnet synchronous machine (HSPMSM); inductor-capacitor-inductor (LCL) filter; robustness; synchronous rotating frame (SRF); ACTIVE DAMPING CONTROL; PERFORMANCE; CONVERTERS; INVERTERS; DESIGN;
D O I
10.1109/TPEL.2024.3450748
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
For an inductor-capacitor-inductor (LCL) equipped high-speed permanent magnet synchronous machine (LCL-HSPMSM), the negative resonance frequency in the synchronous rotating frame poses a significant yet understudied challenge to the robustness of the adjustable-speed system. This article proposes a two-degree-of-freedom (2DOF) current control strategy that enhances the robustness of the system by maximizing its global stability margin. First, a mathematical model of an LCL-HSPMSM in the discrete-time domain is established, based on which the influence of both positive and negative resonance frequencies on the system stability is analyzed. Subsequently, a phase compensator and a phase gain are introduced to achieve active damping for both resonance frequencies. Additionally, a feedforward controller provides an extra DOF to mitigate the coupling between dq-axes currents, distinguishing it from the conventional control strategy. Consequently, a robust system resilient to parameter mismatches can be achieved. Finally, experimental verification of the robust control strategy is conducted on a 60kr/min LCL-HSPMSM prototype, where key parameters are varied from 0.3 to 3 times the nominal values.
引用
收藏
页码:15954 / 15966
页数:13
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