Study on Stability and Performances of DTC Due to Stator Resistance Variation

A. Jidin, N. Idris, A. Yatim
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引用次数: 6

Abstract

A stator-flux-based direct torque control (DTC) of induction machine has shown significant interests to researchers since its offer several advantageous compared to many other control schemes. This scheme requires only one parameter which is a stator resistance in order to estimate the stator flux-linkage, hence the electromagnetic torque can be directly calculated. In practice, a wide variation in stator resistance can occur due to a large temperature variation. Thus, the mismatch between estimated and actual stator resistances will deteriorate the performance of DTC by introducing errors in the stator flux estimation particularly at low speed. Consequently, the torque performance will be degraded. This paper presents the study on stability and performances of DTC due to stator resistance variation. The effect on DTC performances due to the stator resistance variation will be analytically studied with the help of simulation results.
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定子电阻变化对直接转矩控制稳定性及性能的影响
基于定子磁链的异步电机直接转矩控制(DTC)由于具有许多其他控制方案所没有的优点而引起了研究人员的极大兴趣。该方案只需要一个定子电阻参数即可估计定子磁链,因此可以直接计算电磁转矩。在实际应用中,由于温度变化较大,定子电阻会发生较大的变化。因此,定子电阻估计值与实际电阻之间的不匹配会在定子磁链估计中引入误差,从而恶化DTC的性能,特别是在低速时。因此,扭矩性能将会下降。本文研究了定子电阻变化对直接转矩控制系统稳定性和性能的影响。结合仿真结果分析了定子电阻变化对直接转矩控制性能的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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