Performance Improvement of Induction Motor Current Controllers in Field-Weakening Region for Electric Vehicles

被引:33
作者
Liu, Yang [1 ]
Zhao, Jin [1 ]
Wang, Rui [2 ]
Huang, Chengguang [1 ]
机构
[1] Huazhong Univ Sci & Technol, Dept Control Sci & Engn, Wuhan 430074, Hubei, Peoples R China
[2] China CNR Corp Ltd, Dalian Locomot Res Inst, Beijing 100078, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Current control; expert controller; flux weakening; fuzzy inference; CURRENT REGULATOR; TORQUE; OPERATION; MACHINE; DRIVES; FLUX; FREQUENCY; DESIGN;
D O I
10.1109/TPEL.2012.2217757
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
A novel flux weakening strategy and an expert controller utilizing fuzzy inference mechanism are proposed to improve robustness of current control in the flux weakening region. Because of variable parameters, high ratios of fundamental-to-sampling frequencies and interval delay caused by pulsewidth modulation (PWM) and digital discrete, the effects of the current control technologies are degraded in the existing indirect field-oriented control system. It is especially obvious when motors work in the weakening region. Highly oscillatory or unstable response may occur if current regulators do not obtain proper current commands. Thus, an expert controller changing current command before current regulators is proposed to avoid unreasonable tuning. Based on the simple and formal inference rules, the expert controller could be trigged in parallel. Even in the case of invalid performance target, the suboptimal parameter could be substituted. As a part of the current control, a novel flux weakening strategy is proposed for engineering applications. Simulation and experiment results are provided to verify the stability of current control.
引用
收藏
页码:2468 / 2482
页数:15
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