Abstract：Most analysis of induction motor drives employs the conventional T-type equivalent circuit. This model is actually as complicated as unnecessary for analysis in the linear system. Moreover, it is inadequate for use when parameters varied. ?-1 -type model is simple and particularly appropriate for analysis of vector control of induction motors. Extended Kalman filter (EKF) based on ?-1 model is studied and implemented in vector control system. The influence of motor parameter changes is treated as the state noises of EKF and this improves the precision for vector control. Open-loop speed estimator has not only simpler structure but also reduces the computational cost of EKF. The speed estimator has a low-pass filter to suppress the noise generated by the pure differentiator in order to satisfy both dynamic and steady state requirements. The experimental results based on DSP demonstrate the satisfied steady performances in wide range of speed control.
李哲峰, 孙大南, 刁利军, 林文立, 刘志刚. 异步电动机在Γ-1模型下的扩展卡尔曼滤波器[J]. 电工技术学报, 2009, 24(5): 29-33.
Li Zhefeng, Sun Danan, Diao Lijun, Lin Wenli, Liu Zhigang. Extended Kalman Filter for ?-1-Type Model of Induction Motor. Transactions of China Electrotechnical Society, 2009, 24(5): 29-33.
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