摘要
传统采用滤波器代替纯积分的方案虽可解决电压模型磁链观测器的积分环节存在的积分漂移问题,但引入了幅相误差,一般通过增加动态补偿环节或者通过动态调节滤波器的截止频率来消除,两类方法均需用到异步电机同步角频率。本文提出使用二阶广义积分器-锁频环(Second Order Generalized Integrator-Frequency Locked Loop,SOGI-FLL)估计异步电机同步角频率的方法,并对其频率响应性能进行理论分析和仿真验证。构建了基于异步电机矢量控制的转速电流双闭环调速系统实验平台,将SOGI-FLL估计出的同步角频率用于磁链观测算法中,实验结果验证了所提方案的有效性。
Although the integrator drift problem of the flux observers based on voltage model can be solved by using filters instead of pure integrator, it introduces the amplitude and phase errors. Considering the inaccuracy and bad dynamic performance of the traditional synchronous angular frequency estimation methods, a new method based on second order generalized integrator-frequency locked Ioop（SOGI-FLL） is proposed in this paper. The speed of the dynamical response of SOG1-FLL is theoretically analyzed. The synchronous angular frequency that is estimated through the new method can be used for dynamic compensation of variable flux observer systems, which can improve the accuracy of flux observer and is easy to implement in industrial application. An induction motor speed control system is built based on the vector control and controlled by TMS320F2812 DSP. Simulation and experimental results prove the effectiveness of the proposed method.
出处
《电工技术学报》
EI
CSCD
北大核心
2014年第1期116-122,共7页
Transactions of China Electrotechnical Society
基金
中央高校基本科研业务费专项资金资助项目(10CX04036A)
关键词
磁链观测器
动态补偿
同步角频率
矢量控制
Flux observer, dynamic compensation, synchronous angular frequency, vector control
