Permanent magnet inductor design for reduced mass inductive components.

摘要

In this work permanent magnet inductors for dc biased inductor applications are considered. The inductor designs utilize the persistent flux of a permanent magnet to partially offset the flux in the magnetic core due to current in the winding. The addition of the permanent magnet allows for decreased inductor mass for a given inductor current, loss, and inductance rating. This dissertation presents the first formal optimization of permanent magnet inductors. Optimized inductor designs are achieved using a population-based, multi-objective optimization algorithm in which the design parameters consist of the permanent magnet material type and geometry of the magnetic core, conductor, and permanent magnet. By comparing Pareto-optimal fronts, it is shown that the mass of a permanent magnet inductor is significantly less than that of a traditional EI core inductor for a given loss. Then, an optimization algorithm of a dc-dc power converter utilizing a permanent magnet inductor is presented. The algorithm includes both a magnetic and thermal analysis.