Advanced Applications of High Temperature Magnetics

Abstract

In recent years, high temperature magnetic structures have been developed and used for inductors and transformers in high temperature applications ranging from power electronics to wireless telemetry systems. Research in the high temperature magnetics field has led to the development of more advanced magnetic structures that can enable diverse applications ranging from regulators to amplifiers, with far reaching implications for the high temperature electronics community. Current high temperature electronics have shown potential in lab and rig tests, but high temperature electronics systems suffer from the relatively limited lifetime of the semiconductor devices themselves. The advanced magnetics discussed in this paper can be designed to have extreme lifetime capabilities even at elevated temperatures, and as such can have an immediate impact on the implementation of true field deployable high temperature electronic systems. Aerospace, power generation, and automotive industries may especially benefit from this technology, as significant advances in health monitoring and active engine control will be enabled by these advanced magnetic structures. A theoretical understanding of these advanced magnetic structures is necessary for initial design and feasibility, while the true development and implementation of this technology depends on state of the art high temperature packaging approaches. By combining high temperature, grain-oriented magnetic materials along with high temperature packaging processes, APEI, Inc. has created advanced high temperature magnetic systems that indicate the technology described in this paper is a viable one, with applications across a wide range of high temperature electronics systems.