US 6,507,176 B2Granted

Synthesis methods for enhancing electromagnetic compatibility and AC performance of power conversion circuits

AssigneeTechnical Witts, Inc.

InventorErnest H. Wittenbreder, Jr.

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Abstract

Five circuit synthesis methods, for forming new power conversion circuits with enhanced electromagnetic compatibility and improved AC performance from old circuits with AC performance and/or electromagnetic compatibility deficiencies, are revealed. The new synthesis methods achieve performance improvements without requiring the addition of magnetic cores. In all cases a simple toroidal magnetic core structure is not precluded. In all cases splitting or adding magnetic windings is required, and, in many cases, additional capacitors are required. Many new circuits formed by applying the synthesis methods are revealed. The results achieved by application of the synthesis methods include zero ripple current at all terminals without adding magnetic cores or requiring a complex magnetic circuit element, cancellation of common mode currents, improved control loop bandwidth, and faster transient response.

Claims26

Dependent claims

A synthesis method for improving terminal current properties of power conversion networks applicable to an original three terminal power conversion network having,

a first power conversion network terminal
a second power conversion network terminal for which terminal voltage of said second power conversion network terminal differs from terminal voltage of said first power conversion network terminal by a DC voltage,
a third power conversion network terminal,
a first winding network, having first and second terminals, connected in series with said third power conversion network terminal, said first wind network having a single winding or a combination of windings connected to each other in a series and/or parallel structure,
comprising the steps of,
(a) add a second winding network, having first and second terminals, of the same structure as said first winding network with said first terminal of said second winding network connected to said first power conversion network terminal,
(b) add a third winding network, having first and second terminals, of the same structure as said first winding network with said first terminal of said third winding network connected to said second power conversion network terminal,
(c) add a first capacitor, having first and second terminals, with said first terminal of said first capacitor connected to said first power conversion network terminal and with said second terminal of said first capacitor connected to said second power conversion network terminal, if said original three terminal power conversion network does not already comprise a capacitor connecting said first power conversion network terminal to said second power conversion network terminal,
whereby a new three terminal power conversion network, defined by said third power conversion network terminal, said second terminal of said second winding network, and said second terminal of said third winding network, is formed with reduced terminal current ripple by comparison to said original three terminal power conversion network.

6 more elements

A synthesis method for improving the electromagnetic compatibility properties of power conversion networks applicable to an original two terminal power conversion network having,

a first power conversion network terminal,
a second power conversion network terminal,
a first winding network, having first and second terminals, comprising a single winding or a combination of windings connected to each other in a series and/or parallel structure, with said first winding network connected in series with said first power conversion network terminal,
a first electronic circuit network, having first and second terminals, with said first electronic circuit network connected in series with said first winding network, and, comprising,
switch means,
comprising the steps of,
(a) add a second winding network, having first and second terminals, of the same structure as said first winding network with said second terminal of said second winding network connected to said first power conversion network terminal,
(b) add a third winding network, having first and second terminals, of the same structure as said first winding network with said first terminal of said third winding network connected to said second power conversion network terminal,
whereby a new two terminal power conversion network, defined by said second terminal of said third winding network and said first terminal of said second winding network, is formed in which the AC parasitic currents contributed by said first terminal of said third winding network and said second terminal of said second winding network cancel thereby enhancing the electronic compatibility of said new two terminal power conversion network by comparison to said original two terminal power conversion network.

6 more elements

A synthesis method for improving the terminal current properties of power conversion networks applicable to an original half bridge power conversion network having,

a first half bridge network terminal,
first switch means, having first and second terminals, with said first terminal of said first switch means connected to said first half bridge network terminal,
second switch means, having first and second terminals, with said first terminal of said second switch means connected to said second terminal of said first switch means,
a second half bridge network terminal connected to said second terminal of said second switch means,
a first capacitor, having first and second terminals, with the first terminal of said first capacitor connected to one of said half bridge network terminals,
a first winding network, having first and second terminals, connected in a center leg of said half bridge power conversion network between said second terminal of said first switch means and said second terminal of said first capacitor, comprising a single winding or a combination of windings connected to each other in a series and/or parallel structure,
a first electronic circuit network, having first and second terminals, with said first electronic circuit network connected in series with said first winding network, having,
a conducting path or lead,
comprising the steps of,
(a) add a second capacitor, having first and second terminals, with said first terminal of said second capacitor connected to said second terminal of said first capacitor, and with said second terminal of said second capacitor connected to said half bridge network terminal not connected to said first capacitor thereby forming a series capacitor leg between said first half bridge network terminal and said second half bridge network terminal, if said original half bridge power conversion network does not already comprise said second capacitor,
(b) open said connection of said first terminal of said first switch means to said first half bridge network terminal and add a second winding network, having first and second terminals, of the same structure as said first winding network, with said first terminal of said second winding network connected to said first half bridge network terminal and said second terminal of said second winding network connected to said first terminal of said first switch means,
(c) open said connection of said second terminal of said second switch means to said second half bridge network terminal and add a third winding network, having first and second terminals, of the same structure as said first winding network, with said first terminal of said third winding network connected to said second half bridge network terminal and said second terminal of said third winding network connected to said second terminal of said second switch means,
(d) open said connection of said first half bridge network terminal to said capacitor and add a fourth winding network, having first and second terminals, of the same structure as said first winding network, with said second terminal of said fourth winding network connected to said first half bridge network terminal and with said first terminal of said fourth winding network connected to said capacitor,
(e) open said connection of said second half bridge network terminal to said capacitor and add a fifth winding network, having first and second terminals, of the same structure as said first winding network, with said second terminal of said fifth winding network connected to said second half bridge network terminal and with said first terminal of said fifth winding network connected to said capacitor,
whereby a new half bridge power conversion network is formed with reduced terminal current ripple by comparison to said original half bridge power conversion network.

12 more elements

A synthesis method for improving terminal current properties of power conversion networks applicable to an original full bridge power conversion network having,

a first full bridge network terminal,
first switch means, having first and second terminals, with said first terminal of said first switch means connected to said first full bridge network terminal,
second switch means, having first and second terminals, with said first terminal of said second switch means connected to said second terminal of said first switch means,
third switch means, having first and second terminals, with said first terminal of said third switch means connected to said first full bridge network terminal,
fourth switch means, having first and second terminals, with said first terminal of said fourth switch means connected to said second terminal of said third switch means,
a second full bridge network terminal connected to said second terminal of said second switch means and to said second terminal of said fourth switch means,
a first winding network, having first and second terminals, connected in a center leg of said full bridge power conversion network between said second terminal of said first switch means and said second terminal of said third switch means, said first winding network having a single winding or a combination of windings connected to each other in a series and/or parallel structure,
a first electronic circuit network, having first and second terminals, with said first electronic circuit network connected in series with said first winding network, said first electronic circuit network,
a conducting path or lead,
comprising the steps of,
(a) open said connection of said first terminal of said first switch means to said first full bridge network terminal and add a second winding network, having first and second terminals, of the same structure as said first winding network, with said first terminal of said second winding network connected to said first full bridge network terminal and said second terminal of said second winding network connected to said first terminal of said first switch means,
(b) open said connection of said second terminal of said second switch means to said second full bridge network terminal and add a third winding network, having first and second terminals, of the same structure as said first winding network, with said first terminal of said third winding network connected to said second full bridge network terminal and said second terminal of said third winding network connected to said second terminal of said second switch means,
(c) open said connection of said first terminal of said third switch means to said first full bridge network terminal and add a fourth winding network, having first and second terminals, of the same structure as said first winding network, with said second terminal of said fourth winding network connected to said first full bridge network terminal and said first terminal of said fourth winding network connected to said first terminal of said third switch means,
(d) open said connection of said second terminal of said fourth switch means to said second full bridge network terminal and add a fifth winding network, having first and second terminals, of the same structure as said first winding network, with said second terminal of said fifth winding network connected to said second full bridge network terminal and said first terminal of said fifth winding network connected to said second terminal of said fourth switch means,
(e) add a first capacitor, having first and second terminals, with said first terminal of said first capacitor connected to said second terminal of said second winding network and with said second terminal of said first capacitor connected to said second terminal of said third winding network,
(f) add a second capacitor, having first and second terminals, with said first terminal of said second capacitor connected to said first terminal of said fourth winding network and with said second terminal of said second capacitor connected to said first terminal of said fifth winding network,
whereby a new full bridge power conversion network is formed with reduced terminal current ripple by comparison to said original full bridge power conversion network.

14 more elements

A synthesis method for improving terminal current properties of power conversion networks applicable to an original stacked full bridge power conversion network having,

a first stacked full bridge network terminal,
first switch means, having first and second terminals, with said first terminal of said first switch means connected to said first stacked full bridge network terminal,
a first capacitor, having first and second terminals with said first terminal of said first capacitor connected to said first terminal of said first switch means,
second switch means, having first and second terminals, with said first terminal of said second switch means connected to said second terminal of said first switch means and with said second terminal of said second switch means connected to said second terminal of said first capacitor,
third switch means, having first and second terminals, with said first terminal of said third switch means connected to said second terminal of said second switch means,
a second capacitor, having first and second terminals with said first terminal of said second capacitor connected to said first terminal of said third switch means,
fourth switch means, having first and second terminals, with said first terminal of said fourth switch means connected to said second terminal of said third switch means and with said second terminal of said fourth switch means connected to said second terminal of said second capacitor,
a second stacked full bridge network terminal connected to said second terminal of said fourth switch means,
a first winding network, having first and second terminals, connected in a center leg of said stacked full bridge between said second terminal of said first switch means and said second terminal of said third switch means, comprising a single winding or a combination of windings connected to each other in a series and/or parallel structure,
a third capacitor connected in series with said first winding network in said center leg of said stacked full bridge power conversion network,
a first electronic circuit network, having first and second terminals, with said first electronic circuit network connected in series with said first winding network, said first electronic circuit work at a minimum,
a conducting path or lead,
comprising the steps of,
(a) break open said connection of said first terminal of said first switch means to said first stacked full bridge network terminal and add a second winding network, having first and second terminals, of the same structure as said first winding network, with said first terminal of said second winding network connected to said first stacked full bridge network terminal and said second terminal of said second winding network connected to said first terminal of said first switch means,
(b) break open said connection of said second terminal of said second switch means to said first terminal of said third switch means and add a third winding network, having first and second terminals, of the same structure as said first winding network, with said second terminal of said third winding network connected to said second terminal of said second switch means,
(c) add a fourth winding network, having first and second terminals, of the same structure as said first winding network, with said second terminal of said fourth winding network connected to said first terminal of said third winding network and said first terminal of said fourth winding network connected to said first terminal of said third switch means,
(d) break open said connection of said second terminal of said fourth switch means to said second stacked full bridge network terminal and add a fifth winding network, having first and second terminals, of the same structure as said first winding network, with said second terminal of said fifth winding network connected to said second stacked full bridge network terminal and said first terminal of said fifth winding network connected to said second terminal of said fourth switch means,
whereby a new stacked full bridge power conversion network is formed with reduced terminal current ripple by comparison to said original stacked full bridge power conversion network.

15 more elements

Dependencies are inferred from the claim text.