Magnetic core for a coupled multi coil filter inductor

摘要

A three phase coupled filter inductor core of a low reluctance material consists of two matching parts joined to create closed magnetic flux paths, at least one part having a planar base portion and four parallel pillars extending from a surface of the planar base, three of the pillars are spaced by a same radial distance, from the axis of a fourth pillar, centered on the planar base. A coupled three phase filter inductor for a synchronous interleaved multiphase DC-DC buck converter, includes at least three phase coils wound on the three spaced pillars of the coupled inductor core and oriented in a way to establish an inverse magnetic coupling of any one of the three phase coils with the other two coils.