Project 5: Modeling of soft magnetic materials under consideration of the relevant parameters for electric drives

在节能机器领域的新发展的重点特别是在功率密度和效率的增加。机器核心的软磁材料是从电能到机械能的能量转换的核心部件。为了实现即使在高速下也能显著提高机器性能，方法上的改进是材料方面的有效策略。目标值、损耗和磁化率都受到电机设计以及所用软磁材料的影响。由于设计措施在很大程度上耗尽了提高效率的潜力，目前研究和开发的重点是材料设计。然而，不仅带材的机械和磁性能是决定性的，而且处理也是决定性的，通过其对材料的磁行为的影响，需要从材料生产和加工的相互角度来看待。IEM在研究小组的前三个项目年的主要研究工作是开发一种半物理相关模型作为相关微观结构参数和宏观之间的界面，非晶粒取向电工钢的可测量的磁性和机械性能。该子项目-研究小组所要求的第二个资助阶段的总体目标是全面了解整个非晶粒取向电工钢的生产和加工，在此基础上控制工艺，从而，将有可能对电力驱动进行定制使用。通过新合金概念检查的可转移性、建模的验证以及通过工艺链的连续建模对生产策略的应用优化适应直到电机应用是项目合作伙伴合作的核心任务。在此背景下，IEM开发了以下关键方面：生产电工钢样品的磁特性表征、考虑材料的机械和磁模拟耦合、微观结构和加工影响的定量成像，以及针对不同操作点的特定材料微观结构的确定和生产。在项目结束时，将对演示器的设计、建造和测试进行评估，并对所使用的微观结构、组件、模型及其应用进行验证。

The focus of new developments in the area of energy-efficient machines is in particular on an increase in the power density and the efficiency. The soft-magnetic material at the core of the machines is the central component of the energy conversion from electrical to mechanical energy. In order to achieve a noticeable increase in the performance of the machine even at high speeds, the methodological improvement is an effective strategy on the part of the material. Both target values, losses and magnetizability are influenced by the design of the machine in combination with the soft-magnetic materials used. As the potential for efficiency gains is largely exhausted by design measures, the focus of current research and development is on material design. However, not only the mechanical and magnetic properties of the strip material are decisive, but also the processing which, by its influence on the magnetic behavior of the material, requires a reciprocal view of material production and processing.The main research work of the IEM in the first three project years of the research group is the development of a semi-physical correlation model as an interface between relevant microstructural parameters and macroscopic, measurable magnetic and mechanical properties of non-grain oriented electrical steel.The sub-project-wide overall objectives of the requested second funding phase of the research group aim at a holistic understanding of the entire non-grain oriented electrical steel production and processing, with the aid of which a control of the processes and, thus, a tailored use for electric drives will be made possible. The transferability, which is examined by means of a new alloy concept, the validation of the modeling as well as the application-optimized adaption of the production strategies by the continuous modeling of the process chain up to the application in electrical machines are the core task of the cooperation of the project partners. In this context, the IEM develops the key aspects of the metrological characterization of the produced electrical steel samples, the coupling of mechanical and magnetic simulation taking into account the material, the quantitative imaging of the microstructure and the processing influence, and the determination and production of specific material microstructures for different operating points. At the end of the project, the design, construction and testing of a demonstrator will be evaluated and validated for the microstructures, components, models used and their application.