摘要
为了提高感应电机矢量控制中转矩的动态响应能力,提出了一种改进矢量控制方法。该方法涉及了旋转坐标变换引入的交叉耦合电势对PI调节器动态性能的影响,在前馈解耦补偿时采用给定量代替反馈量,提高了转矩跟踪速度。同时为了减小前馈补偿项对电机参数的依赖,进而提高系统的稳定性,引入了模糊自适应PI调节器代替传统的PI调节器。最后,对该改进方案的控制效果进行了实验验证。实验及研究结果表明,所提出的控制策略在保证系统具有良好稳定性的同时能够显著改善感应电机转矩的动态响应特性。
In order to improve the torque dynamic response,an improved vector control scheme for induction motor was proposed.Analyzing the cross-coupling voltage after vector transformation,a feed-forward decoupling scheme was introduced,while the fuzzy-PI controller was used to replace the traditional PI controller to reduce the dependence on motor parameters in calculating the compensation items and improve the stability of system.Finally,the effect of this control scheme is verified in experiment.The results indicate that,the proposed control strategy can guarantee the system has good stability,and it can significantly improve the dynamic response characteristics of induction motor torque.
出处
《机电工程》
CAS
2013年第5期581-584,644,共5页
Journal of Mechanical & Electrical Engineering
关键词
感应电机
矢量控制
前馈解耦
模糊PI
转矩
动态响应
induction motor
vector control
feed-forward decoupling
fuzzy-PI
torque
dynamic response
