| 一种感应电机直接转矩控制磁链观测的改进方法 |
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| 引用本文： | 万淑芸,胡婵娟,徐金榜,万宇宾. 一种感应电机直接转矩控制磁链观测的改进方法[J]. 华中科技大学学报(自然科学版), 2005, 0(8) |
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| 作者姓名： | 万淑芸 胡婵娟 徐金榜 万宇宾 |
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| 作者单位： | 华中科技大学控制科学与工程系 湖北武汉430074(万淑芸，胡婵娟，徐金榜)，华中科技大学控制科学与工程系 湖北武汉430074(万宇宾) |
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| 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.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.仿真结果表明,采用低通滤波器补偿法,直接转矩控制系统的低速性能有十分明显的提高,证实了该方法的有效性.
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| 关 键 词： | 感应电机 直接转矩控制 磁链估算 低通滤波器 |
An improved method of flux linkage estimation of direct torque control in induction motors |
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| Wan ShuyunHu ChanjuanXu JinbangWan YubinWan ShuyunProf., Dept. of Control Sci. , Eng.,Huazhong Univ. of Sci. , Tech.,Wuhan ,China.. An improved method of flux linkage estimation of direct torque control in induction motors[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 2005, 0(8) |
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| Authors: | Wan ShuyunHu ChanjuanXu JinbangWan YubinWan ShuyunProf. Dept. of Control Sci. & Eng. Huazhong Univ. of Sci. & Tech. Wuhan China. |
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| Affiliation: | Wan ShuyunHu ChanjuanXu JinbangWan YubinWan ShuyunProf., Dept. of Control Sci. & Eng.,Huazhong Univ. of Sci. & Tech.,Wuhan 430074,China. |
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| Abstract: | 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. 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. The simulation results showed that the performances have been improved by the compensation method based on low-pass filter in low speed in DTC system, confirming the validity of the method. |
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| Keywords: | induction motor DTC (direct torque control) flux estimation low-pass filter |
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