文档介绍：基于DSP的新型异步电机直接转矩控制系统
姚兰英,吕振,孙玉凤
(辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛 125105)
摘要:分析了异步电机直接转矩控制控制理论;提出了一种利用电机定子电压电流,采用新型的混合型定子磁链观测器来辨识异步电机速度的方法;介绍了一种基于TMS320LF2407A型DSP的无速度传感器的直接转矩控制系统实现方案,通过硬件和软件设计,实现了对异步电动机的控制。系统采用TMS320LF2407A构成核心电路,以智能功率模块6MBP50RA060构成逆变器主电路,方案合理、结构紧凑。实验结果表明,该系统具有动态响应快、调速范围广、可靠性高等特点。
关键词:直接转矩控制;新型磁链观测器;数字信号处理器;智能功率模块
Sensorless Direct Torque Control System of Asynchronous Motor based on DSP
YAO Lan-ying, LV Zhen,SUN Yu-feng
(Faculty of Electrical and Control Engineering, Liaoning Technical University, HuLuDao125105 China)
Abstract:This paper analyzes the Direct Torque Control(DTC) theory. It presents a method of speed identification of asynchronous motor by measured motor stator voltage and current with equipment of new flux observer, and introduces a speed sensorless direct torque control scheme based on TMS320LF2407A. By the design of its hardware and software, the direct torque control for asynchronous motor is implemented. The key control part of system is consisted of TI DSP TMS320LF2407A, and main power part is made up of IPM 6MBP50RA060. The experiment results show that the system has very quick dynamic response, wide speed regulating scope and high reliability.
Key words: direct torque control; new flux observer; digital signal processor; intellectual power module(IPM)
0 引言[1、2]
交流异步电机相对于直流电机在结构简单、维护容易、对环境要求低以及节能和提高生产力等方面具有足够的优势,使得交流调速已经广泛运用于工农业生产、运输、国