Dual Cost Function Model Predictive Direct Speed Control With Duty Ratio Optimization for PMSM Drives

被引:5
作者
Liu, Ming [1 ,2 ]
Hu, Jiefeng [3 ]
Chan, Ka Wing [1 ]
Or, Siu Wing [1 ,2 ]
Ho, Siu Lau [1 ,2 ]
Xu, Wenzheng [1 ,2 ]
Zhang, Xian [1 ]
机构
[1] Hong Kong Polytech Univ, Dept Elect Engn, Hong Kong, Peoples R China
[2] Natl Rail Transit Electrificat & Automat Engn Tec, Hong Kong Branch, Hong Kong, Peoples R China
[3] Federat Univ Australia, Sch Engn Informat Technol & Phys Sci, Ballarat, Vic 3353, Australia
关键词
Model predictive control; direct speed control; hardware-in-the-loop; permanent magnet synchronous machine; FINITE CONTROL SET; TORQUE CONTROL; MOTOR;
D O I
10.1109/ACCESS.2020.3007627
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Traditional speed control of permanent magnet synchronous motors (PMSMs) includes a cascaded speed loop with proportional-integral (PI) regulators. The output of this outer speed loop, i.e. electromagnetic torque reference, is in turn fed to either the inner current controller or the direct torque controller. This cascaded control structure leads to relatively slow dynamic response, and more importantly, larger speed ripples. This paper presents a new dual cost function model predictive direct speed control (DCF-MPDSC) with duty ratio optimization for PMSM drives. By employing accurate system status prediction, optimized duty ratios between one zero voltage vector and one active voltage vector are firstly deduced based on the deadbeat criterion. Then, two separate cost functions are formulated sequentially to refine the combinations of voltage vectors, which provide two-degree-of-freedom control capability. Specifically, the first cost function results in better dynamic response, while the second one contributes to speed ripple reduction and steady-state offset elimination. The proposed control strategy has been validated by both Simulink simulation and hardware-in-the-loop (HIL) experiment. Compared to existing control methods, the proposed DCF-MPDSC can reach the speed reference rapidly with very small speed ripple and offset.
引用
收藏
页码:126637 / 126647
页数:11
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