Compound inductors for use in switching regulators

H - Electricity – 01 – F

Patent

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Details

H01F 27/38 (2006.01) G05F 1/24 (2006.01) H01F 37/00 (2006.01) H02M 1/00 (2006.01)

Patent

CA 2147293

Compound inductors for use in switching regulators have two or more symmetrically coupled windings so the component size is reduced as well as a reduction in power losses compared with conventional inductors. The compound inductors may be used in buck and boost regulators. The compound inductor assembly has a first inductor with a first winding on a first magnetic core, a second inductor with a second magnetic core outside the first winding of the first inductor, and a second winding around the first winding of the first inductor and the second core. One end of the first winding and the corresponding end of the second winding is connected to a common connection such that voltages from an alternating current flowing in the first winding have the same polarity in the first winding and in the second winding.

Cette invention concerne des inducteurs composés pour régulateurs de commutation ayant deux ou plusieurs enroulements couplés de façon symétrique pour réduire l'encombrement du composant et les pertes de puissance par rapport aux inducteurs classiques. Les inducteurs composés de l'invention peuvent être utilisés dans des régulateurs abaisseurs de tension et des régulateurs élévateurs de tension. L'inducteur objet de l'invention comprend un premier inducteur ayant un premier enroulement sur un premier noyau magnétique, un second inducteur ayant un second noyau magnétique à l'extérieur du premier enroulement du premier inducteur et un second enroulement autour du premier enroulement du premier inducteur et du second noyau. Un bout du premier enroulement et le bout correspondant du second enroulement sont connectés à une borne commune de sorte que les tensions du courant alternatif passant dans le premier enroulement aient la même polarité dans ledit premier enroulement et ledit second enroulement.

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