以下为句子列表：
英文: According to the characteristics of DTC (direct torque control) in induction machine, this paper analyzed the estimation error of flux linkage and torque, and introduced an improved method of flux estimation, a compensation method based on low-pass filter
中文: 摘要根据感应电机直接转矩控制的特点，对低速下磁链观测误差产生的原因进行了分析，给出了一种磁链观测的改进方法－低通滤波器补偿法。
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英文: Based on the relationship between real and estimated values of the stator flux linkage, the compensatory formulas of the estimated flux linkage and its principle block diagram were presented.
中文: 这种方法在采用低通滤波器代替纯积分环节的基础上，根据定子磁链的实际值与估计值之间的关系，推导出估计磁链的补偿公式，给出了原理框图，并对观测结果进行了仿真比较。
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