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

9622649贾尔斯快冷金属玻璃，如铁-硼-硅(Fe-B-Si)，由于其在宽频带下固有的低能量损耗，已被用作电力变压器和电机的软磁芯材料。具体地说，它们表现出低的直流磁滞损耗和低的经典损耗(与低热导率相关)。目前的研究目的是减少总铁损中的超额涡流部分。该方法是通过激光划线来改变表面的磁畴结构。考虑到金属玻璃的粗糙表面和低的热扩散率，将尝试进行热模拟。模型和实验的结合很可能有助于更好地理解激光与金属玻璃的相互作用。如果激光划片降低涡流损耗的假设得到证实，那么对于积极参与这项研究的变压器铁心制造商来说，这将是一种有吸引力的制造工艺，他们提供了金钱和研究人员的时间。电力转换效率低下的变压器和电机是能源消耗的主要来源，耗资达数十亿美元。浪费的一个主要来源是这些设备中磁芯的能量损失。这项研究提供了一种创新的制造工艺步骤，有可能减少一种新型磁性材料的能量损失。美国电力变压器和电机制造商可能会在竞争中取得重大领先地位。事实上，一家制造商已经做出了实质性的承诺。此外，这种产学研合作可能会促进学术界和产业界之间的思想交流，并加强学生的教育进程。

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.