基于无源性的感应电机最小磁场能量的效率优化控制

Passivity-Based Efficiency Optimization Control for Induction Motor under Minimum Magnetic Energy Principle

借鉴互联和阻尼分配的基于无源性控制器设计的基本思想和设计方法,依据最小磁场能量原则,设计了一种新的效率优化的感应电机转矩跟踪控制器.由于只针对分解后得到的电气子系统进行最小磁场能量优化和转矩跟踪控制器设计,得到的磁通优化律不受转子电阻的影响,且控制器不需要观测转子侧的状态变量,因此系统具有更强的参数鲁棒性.控制器方程是全局定义的,不存在发散奇点,能够跟踪快速变化的转矩和磁通给定,从而保证了系统的动静态性能.仿真实验结果证实,该控制器在保证系统具有良好的动、静态性能的同时,能有效地提高感应电机轻载时功率因数,并取得良好的节能效果.

Following the idea and approach of interconnection and damping assignment passivitybased controller design, and according to the minimum magnetic energy criterion, a new torque tracking and efficiency-optimizing controller for induction motors is presented. Because the efficiency optimizing and torque tracking aim at the electrical subsystem, the optimizing law of the rotor-flux norm is independent of the rotor resistance, and the measurements of rotor variables get unnecessary, then the robustness of the control system is enhanced. Furthermore, the control law is defined globally without controller singularities, so the dynamic and static performances are ensured by the fast tracking of the desired torque and rotor-flux norm. The simulation results validate that the power factor is improved effectively while the system keeps satisfactory dynamic and static properties.