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中国电机工程学报 2008, 28(18) 61-65 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电力电子与电力传动 |
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定子磁链观测器低通滤波器的改进 |
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何志明 廖勇 向大为 |
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输配电装备及系统安全与新技术国家重点实验室(重庆大学) 输配电装备及系统安全与新技术国家重点实验室(重庆大学) 输配电装备及系统安全与新技术国家重点实验室(重庆大学) |
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摘要：
为提高传统的改进低通滤波器的动态性能，提出一种新型改进低通滤波算法。与传统改进低通滤波算法不同，新算法对定子感应电势进行相位和幅值补偿，然后再通过低通滤波获得定子磁链，有效提高了传统改进低通滤波器的动态性能，尤其是低速性能。通过理论分析，解释了新算法利用交换补偿与低通滤波环节顺序后磁链观测动态性能提高的原因，该方法在理论上能消除低通滤波器磁链动态跟踪误差。为进一步验证新算法的有效性，建立了感应电动机直接转矩控制系统仿真与实验平台。大量仿真与实验结果验证了该方法的有效性及其优良的动态性能。 |
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关键词：
低通滤波器
定子磁链观测器
电压模型
直接转矩控制
理想积分器
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Improvement of Low-pass Filter Algorithm for Stator Flux Estimator |
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HE Zhi-ming LIAO Yong XIANG Da-wei |
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State Key Laboratory of Power Transmission Equipment & System Security and New Technology
(Chongqing University)
State Key Laboratory of Power Transmission Equipment & System Security and New Technology
(Chongqing University)
State Key Laboratory of Power Transmission Equipment & System Security and New Technology
(Chongqing University)
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Abstract:
In order to improve the dynamic performance of traditional modified low-pass filter(MLPF), a new MLPF algorithm is proposed. In the new MLPF, the magnitude and phase error introduced by low-pass filter(LPF) is compensated before the stator electromotive force filtered for the stator flux estimating, by which the dynamic performance of stator flux estimator, especially the low speed performance, is improved greatly. By theoretical analysis, the reason that the system dynamic performance is improved by exchanging the sequence of the compensator and LPF in flux estimator is explained. The dynamic error is diminished in theory. An induction motor direct torque control system was built in order to verify the effectiveness of new MLPF algorithm. Simulation and experimental results demonstrate that the new MLPF is valid and has good performance. |
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Keywords:
low-pass filter
stator flux estimator
voltage model
direct torque control
ideal integrator
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收稿日期 2007-01-18 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 何志明 |
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作者简介: |
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作者Email: hezm74336@sina.com.cn |
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| 参考文献： |
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| 2．童立青 钱照明 彭方正.同步旋转坐标谐波检测法的数学建模及数字实现[J]. 中国电机工程学报, 2009,29(19): 111-117 |
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| Copyright by 中国电机工程学报 |
