Design of a high-temperature pre-biased line choke for power electronics applications

Chokes are important elements in many power electronics circuits, for example in boost converters and current source inverters. Minimizing the choke´s volume and mass is desirable in many applications. This paper considers using a permanent magnet to pre-bias the choke´s core flux as a means of reducing its volume/weight. A methodology for designing a biased choke is presented and potential benefits are quantified through tests taken from a prototype device.