考虑磁饱和的感应电机MTPA转矩控制
发布时间：2018-09-19 18:47
【摘要】：感应电机的最大转矩电流比(MTPA)控制算法根据需求转矩调节磁链幅值,以达到转矩与定子电流比值的最大化。因磁链随转矩的变化而变化,不再像传统控制算法保持磁场幅值恒定,磁场非线性饱和效应会对控制系统产生影响。针对此问题,该文提出考虑磁饱和特性的MTPA转矩控制系统。根据需求转矩以及饱和模型,通过线性搜索寻找最优磁链目标值,并在计算励磁电流时考虑d轴转子电流的动态特性,用降阶观测器观测转子磁链,并在设计滑模磁链控制器以及反步法设计转矩控制器时考虑观测误差,以确保控制器参数的设置能达到全局稳定。仿真和实验结果证明了所设计控制器的有效性。
[Abstract]:The maximum torque / current ratio (MTPA) control algorithm of induction motor adjusts the flux amplitude according to the demand of torque to maximize the ratio of torque to stator current. Because the flux varies with the torque, the magnetic field amplitude is no longer constant as the traditional control algorithm, and the nonlinear saturation effect of the magnetic field will affect the control system. To solve this problem, a MTPA torque control system considering magnetic saturation is proposed. According to the required torque and saturation model, the optimal flux target value is found by linear search, and the dynamic characteristics of d axis rotor current are taken into account in the calculation of excitation current, and the rotor flux is observed with a reduced order observer. The observation error is considered in the design of the sliding mode flux controller and the backstepping torque controller, so as to ensure the global stability of the parameters of the controller. Simulation and experimental results show the effectiveness of the designed controller.
【作者单位】： 同济大学电子与信息工程学院;
【分类号】：TM346
，
本文编号：2251001
[Abstract]:The maximum torque / current ratio (MTPA) control algorithm of induction motor adjusts the flux amplitude according to the demand of torque to maximize the ratio of torque to stator current. Because the flux varies with the torque, the magnetic field amplitude is no longer constant as the traditional control algorithm, and the nonlinear saturation effect of the magnetic field will affect the control system. To solve this problem, a MTPA torque control system considering magnetic saturation is proposed. According to the required torque and saturation model, the optimal flux target value is found by linear search, and the dynamic characteristics of d axis rotor current are taken into account in the calculation of excitation current, and the rotor flux is observed with a reduced order observer. The observation error is considered in the design of the sliding mode flux controller and the backstepping torque controller, so as to ensure the global stability of the parameters of the controller. Simulation and experimental results show the effectiveness of the designed controller.
【作者单位】： 同济大学电子与信息工程学院;
【分类号】：TM346
，
本文编号：2251001
本文链接：https://www.wllwen.com/kejilunwen/dianlidianqilunwen/2251001.html
