基于模糊理论的异步电机直接转矩控制研究

Research on the Asynchronous Machine Direct Torque Control Based on Fuzzy Theory

传统的直接转矩控制系统中性能的好坏与转矩和磁链调节容差的大小密切相关,而容差本身是一个模糊的语言变量。根据这一特点,提出了一种用模糊控制器取代传统的转矩、磁链控制器的方法。仿真结果表明,与传统方法相比,采用模糊控制器后系统的性能得到了改善。

The regulators tolerance of torque and stator flux in the conventional DTC have an influence on system performance. Proposes an idea of replacing Schmitt trigger by fuzzy controller for regulator, considering that tolerance is a kind of fuzzy quantity which is difficult to make out accurately. Results of simulating indicate that better system performance can be derived from the introduction of fuzzy controller under the same condition with the traditional method.