Abstract：As higher performance of control system is required, current measurement error seriously affected the control performance of electrically excited synchronous motor. The errors generated from the current measurement path are inevitable, such as offset currents and gain deviations, which causes the periodic rotor speed ripples. This paper presents a simple resonant type observer to compensate current measurement errors for the pure-integration-based flux estimation at a low stator frequency. The technique further contains a residual error compensator to eliminate miscellaneous residual error of the integrator. Finally, this paper uses the Matlab/Simulink to simulate excited synchronous motor with two phase current sensors. The simulation results show the effectiveness of the proposed scheme.
周二磊, 符晓, 伍小杰, 戴鹏. 低定子频率下消除电流测量误差的磁链观测器[J]. 电工技术学报, 2011, 26(6): 67-72.
Zhou Erlei, Fu Xiao, Wu Xiaojie, Dai Peng. Flux Observer for Elimination of Current Measurement Error at Low Stator Frequency. Transactions of China Electrotechnical Society, 2011, 26(6): 67-72.
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2011, Vol. 26 
