Investigation of polymer bonded magnetic materials for power conversion

Polymer bonded magnetic materials offers many advantages compared to the conventional type of magnetic materials including shape, physical property and cost. This is a new type of materials which will form a new era of power conversion and is also a new area of research. Until today, no research has been reported on use of polymer bonded magnetic materials. This research studies the method of fabricating a micro-powder filled magnetic polymer composite, its magnetic property and electric property. The paper also describes the application in high frequency power conversion. A phase-shifted converter using self-resonance which is especially useful for transformers constructed from low permeability materials was used to examine the core. A flyback converter is also used to confirm the use as a coupled inductor. Measured characteristics of the materials and the power conversion measurement data confirm the feasibility of the proposed materials.