US 7,480,156 B1Granted

Tapped inductor power conversion networks

OwnerErnest Henry Wittenbreder, Jr.inventor

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Abstract

The subject invention reveals new three terminal tapped inductor canonical cells for non-isolated power conversion. The canonical cells achieve reduced semiconductor component stresses for applications with limited line voltage range for small step up and step down ratios or for large step up and step down ratios. Some of the canonical cells can be used to form buck, boost, and buck boost converters. Another of the canonical cells is a member of the SEPIC family which can both step up and step down or operate in all four quadrants. Related canonical cells which achieve zero voltage switching and improved electromagnetic compatibility are also revealed. A new more robust floating gate drive control circuit is revealed which operates without magnetic components, without optical coupling, and without high voltage semiconductors is revealed.

Claims18

Dependent claims

A power conversion network having two operating states, and having a first terminal, a second terminal, and a third terminal, comprising,

a first circuit branch having a first terminal and a second terminal with said first terminal of said first circuit branch connected to said first terminal of said power conversion network, comprising,
first switch means,
a second circuit branch connected in series with said first switch means comprising,
second switch means operated substantially in anti-synchronization to said first switch means,
a series network connected in parallel to said second switch means, wherein a voltage applied to said series network is equal to a voltage applied to said second switch means, comprising,
a first capacitor,
a first winding of a coupled inductor, wherein a current in said first capacitor is equal to a current in said first winding of said coupled inductor,
third switch means having a first terminal and a second terminal with said first terminal of said third switch means connected to said second terminal of said power conversion network and with said second terminal of said third switch means connected to said second terminal of said first circuit branch, operated substantially in anti-synchronization to said first switch means,
a second winding of said coupled inductor having a first terminal and a second terminal with said first terminal of said second winding of said coupled inductor connected to said third terminal of said power conversion network and said second terminal of said second winding of said coupled inductor connected to said second terminal of said first circuit branch,
whereby said terminals of said power conversion network are connected to an input source of dc voltage and power, an output load, and a return common to both said input source of dc voltage and power and said output load to form a complete power conversion circuit.

7 more elements

A power conversion network having two operating states and having a first terminal, a second terminal, and a third terminal, comprising,

first switch means having a first terminal and a second terminal with said first terminal of said first switch means connected to said first terminal of said power conversion network,
second switch means having a first terminal and a second terminal with said first terminal of said second switch means connected to said second terminal of said power conversion network, operable substantially in anti-synchronization to said first switch means,
a first winding of a coupled inductor having a dotted terminal and an undotted terminal with said dotted terminal of said first winding of said coupled inductor connected to said second terminal of said first switch means,
a second winding of said coupled inductor having a dotted terminal and an undotted terminal with said undotted terminal of said second winding of said coupled inductor connected to said second terminal of said first switch means and with said dotted terminal of said second winding of said coupled inductor connected to said second terminal of said second switch means,
third switch means having a first terminal and a second terminal with said first terminal of said third switch means connected to said third terminal of said power conversion network and said second terminal of said third switch means connected to said undotted terminal of said first winding of said coupled inductor,
a third winding of said coupled inductor having a dotted terminal and an undotted terminal with said dotted terminal of said third winding of said coupled inductor connected to said second terminal of said third switch means,
fourth switch means having a first terminal and a second terminal with said first terminal of said fourth switch means connected to said second terminal of said power conversion network and with said second terminal of said fourth switch means connected to said undotted terminal of said third winding of said coupled inductor, operable substantially in anti-synchronization to said third switch means,
whereby said terminals of said power conversion network are connected to an input source of dc voltage and power, an output load, and a return common to both said input source of dc voltage and power and said output load to form a complete power conversion circuit.

5 more elements

Dependencies are inferred from the claim text.