GOALI/IUCP: Laser Scribing of Metallic Glasses to Improve Efficiency of Electric Motors and Transformers

快速淬火金属玻璃，如铁生硅（Fe-B-Si），由于其固有的低能量损耗，在宽频谱频率下，已被用作变压器和电机的软磁磁芯材料。具体来说，它们表现出低直流迟滞损耗和低经典损耗（与低导热率相关）。目前的研究目标是减少铁芯总损耗中涡流过量部分。该方法是通过激光刻划来修饰表面的磁畴结构。考虑到金属玻璃的粗糙表面和低热扩散率，将尝试进行热建模。模拟与实验相结合，将有助于更好地理解激光与金属玻璃的相互作用。如果通过激光刻划来减少涡流损耗的假设被证明，对于积极参与这项研究的变压器铁芯制造商来说，这将是一个有吸引力的制造工艺，为研究人员提供金钱和时间。变压器和电动机的电力转换效率低下是造成数十亿美元能源消耗的主要原因。浪费的一个主要来源是这些装置中磁芯的能量损失。这项研究提供了一种创新的制造工艺步骤，有可能减少新型磁性材料的能量损失。美国变压器和电机制造商可能获得重大的竞争领先优势。事实上，有一家制造商已经做出了实质性的承诺。此外，这种产业/大学合作研究可能会促进学术界和产业界之间的思想交流，并加强学生的教育过程。

9622649 Jiles Rapidly quenched metallic glasses such as Iron-Born-Silicon (Fe-B-Si) have found applications as soft magnetic core materials in electrical transformers and motors due to their intrinsic low energy losses under a wide spectrum of frequencies. Specifically, they exhibit low dc hysteresis loss and low classical loss (associated with low thermal conductivity). The current research aims to reduce the excess eddy current portion of the total core losses. The approach is to modify the magnetic domain structure on the surface by using laser scribing. Thermal modeling will be attempted taking into account the rough surface and low thermal diffusivity of metallic glasses. The combined modeling and experimentation is likely to lead to a better understanding of laser interaction with metallic glasses. If the hypothesis to reduce eddy current losses by laser scribing is proven, it will be an attractive manufacturing process for the transformer core manufacturer who is actively participating in this research providing both monetary and researcher's time. Electric power conversion inefficiencies in transformers and motors is a major drain of energy running into billions of dollars. A major source of waste lies in the energy loss of magnetic cores in these devices. This research offers an innovative manufacturing process step which has the potential to reduce the energy loss in a new class of magnetic materials. The US manufacturers of electric transformers and motors could gain a major competitive lead. In fact, one manufacturer has given substantial commitment. In addition this collaborative industry/university research is likely to facilitate, an exchange of ideas between academe and industry and enhance the educational process of students.