Energy-optimal torque control and dimensioning of high dynamic induction moor drives under consideration of transient skin effect

现代功率变换器驱动的交流传动装置需要高转矩动态以实现高生产率。然而，转矩的快速变化需要绕组电流的相应快速变化，这导致在鼠笼式电动机的转子条中的瞬态集肤效应的刺激。集肤效应又导致额外的转子绕组损耗，特别是在快速负载循环期间，导致转子温度升高，并因此导致过热问题。此外，瞬态集肤效应影响了两种最广泛使用的控制方法（FOC和DTC）的控制质量。瞬态集肤效应导致转子参数的动态变化。与真实的电机参数的任何偏差都会导致解耦的不正确计算和通量角的不正确估计。这种瞬时集肤效应的代表性例子是造纸机中的横切机驱动器、辊米尔斯中的剪切机和汽车工业中的测试台驱动器。在该项目中，它表明，瞬态集肤效应引起的额外的转子损耗可以有效地减少通过一个节能的高动态转矩控制和通过改进的转子几何形状。同时，感应电动机的机器动态特性和其他操作特性不会受到负面影响。它仍然可以表明，控制质量的改善，一方面通过在转子线棒中的瞬态集肤效应的精确建模，另一方面通过转子参数的实时跟踪，通过在线参数识别方法。在进一步的工作中，理论上获得的知识应该通过实验来检验。与此同时，本课题理论中的最后一个空白应通过转子时间常数的在线参数识别和两个重要目标变量（瞬态集肤效应损耗和转动惯量）的帕累托最优来总结。

A high torque dynamic is demanded in modern power converter powered AC drives for a high productivity. The rapid change of torque, however, requires a correspondingly rapid change of the winding currents, which leads to stimulation of transient skin effect in the rotor bars of squirrel-cage motors. The skin effect, in turn, results in the additional rotor winding losses especially during fast load cycles, an increase of temperature in rotor, and therefore, overheating problems. In addition, the transient skin effect affects the control quality of the two most widely used control methods (FOC and DTC). The transient skin effect leads to a dynamic change in the rotor parameters. Any deviation from the real machine parameters leads to an incorrect calculation of the decoupling and to an incorrect estimation of the flux angle. Representative examples of such transient skin effect are the cross cutter drives in paper machines, the shears in rolling mills and the test bench drives in the automotive industry. During the project, it was shown that the additional rotor losses caused by the transient skin effect can be effectively reduced by means of an energy-efficient high-dynamic torque control and by an improved rotor geometry. At the same time, the machine dynamics and the other operating characteristics of the induction motor are not negatively affected. It could still be shown that the control quality is improved on the one hand by the exact modeling of the transient skin effect in the rotor bars and on the other hand by the real-time tracking of the rotor parameters by means of on-line parameter identification methods. In the further work, the theoretically gained knowledge should be tested experimentally. In parallel, the last gap in the theory of this topic should be concluded by the online parameter identification of the rotor time constant and the Pareto Optimum for the two important target variables (transient skin effect losses and moment of inertia).