摘要
针对感应电机V／F控制系统在空载或轻裁时存在一个持续振荡的稳定性问题，提出一种改善感应电机V／F控制系统稳定性的方法。根据感应电机的数学模型，研究了系统振荡与无功电流波动之间的关系。并基于定子电压定向对电流进行分解，通过控制无功电流恒定调节输出电压来抑制电机振荡，提高系统的稳定性。实验结果表明：该方法不依赖电机参数，鲁棒性高，使系统在0～50Hz内都能平稳运行，电机的振荡得到了抑制，有效地提高了系统的稳定性。
To improve the stability of V/F controlled induction motor drive system, which is always expe- rienced in light load state, a stabilizing control method is presented. Based on the model of induction motor, a deeply analysis revealed the relationship between the system oscillations and the fluctuation of reactive current. And the strategy was implemented by adjusting the output voltage according to the fluctuation of reactive current which was decoupled through stator voltage oriented synchronous rotation frame transformation, The proposed method was parameter indenpent and robust. Experiments show that the system has a very stable operation over the whole speed range from 0 to 50 Hz with the proposed method and the oscillations have be suppressed effectively.
出处
《电机与控制学报》
EI
CSCD
北大核心
2009年第A01期11-14,共4页
Electric Machines and Control
基金
国家自然科学基金(50777013)
关键词
振荡抑制
无功电流
定子电压定向
V/F控制
oscillation suppression
reactive current
stator voltage oriented
V/F control
