DC/DC-converter with a primary circuit and at least one secondary circuit tuned as individually oscillatory circuits

Claim 2

A voltage converter comprising: a transformer coupling (TRA) through which a primary circuit having at least one primary winding (N 1 -N 2 ) is coupled inductively to at least one secondary circuit having a secondary winding (N 3 -N 4 , N 4 -N 6 ) where the primary circuit as regards AC voltage besides an inductive component (L' p ) in the form of the at least one primary winding (N 1 , N 2 ) further comprises at least one capacitive component (C 2 ; C' p ) and where the at least one secondary circuit as regards AC voltage besides an inductive component (L' 1 -L' N ) in the form of said secondary winding (N 3 -N 4 , N 5 -N 6 ) further comprises capacitive and further inductive components, wherein the primary circuit and the at least one secondary circuit each comprise an oscillatory circuit with capacitive and inductive components (C'p, C' 1 -C' N and L' p , L' 1 -L' N ) and wherein each oscillatory circuit is tuned individually to substantially the same resonance frequency.

Claim 3

A voltage converter according to claim 1 further comprising an input terminal electrically associated with the primary circuit for accepting a DC voltage; wherein the voltage converter further comprises a switching circuit for defining a constant switching frequency to reverse current in the at least one primary winding (N 1 , N 2 ) generated by the DC voltage; and wherein the switching frequency is substantially similar to the resonance frequency of each oscillatory circuit.

Claim 4

A voltage converter according to claim 2 further comprising an output terminal electrically associated with the at least one secondary circuit; and further comprising means (D 1 -D 4 ) for rectifying and means (C 4 , C 6 ) for smoothing current induced in the at least one secondary winding (N 3 -N 6 ) so that a DC voltage level applied to the input terminal is converted into a different DC voltage level on the output terminal of the at least one secondary circuit.

Claim 5

A voltage converter according to claim 1 further comprising a regulation circuit including a transformer for sensing a given parameter; wherein the regulation circuit also includes means for regulating an input voltage in response to the given parameter sensed by the transformer; and wherein the regulation circuit is tuned to the resonance frequency.

Claim 6

A voltage converter according to claim 1 wherein the primary circuit has an input terminal for accepting a DC voltage level; wherein the at least one primary winding comprises two symmetrical primary windings (N 1 , N 2 ) having a center (V p ); wherein the input terminal is electrically connected to the center (V p ) of the two symmetrical primary windings (N 1 , N 2 ) through an inductive component (L 1 ); wherein the center (V p ) is also electrically connected to earth, through a capacitor (C 2 ); wherein the two symmetrical primary windings (N 1 , N 2 ) have respective extremities electrically connected to respective transistors (T 1 ,T 2 ) whose states are controlled by a control circuit (10) connected thereto, and wherein the at least one secondary circuit has a plurality of secondary windings (N 3 , N 4 ; N 5 , N 6 ) and a center (V s1 ; V s2 ), wherein the plurality of secondary windings (N 3 , N 4 ; N 5 , N 6 ) are arranged symmetrically around the center (V s1 ; V s2 ) and are electrically connected to earth, wherein said secondary windings have extremities electrically connected to a node (V 1 ; V 2 ) through respective rectifier couplings (D 1 , D 2 ; D 3 , D 4 ), to produce a rectified voltage, wherein said node (V 1 ; V 2 ) is electrically connected partly to earth through a capacitor (C 3 ; C 5 ), and partly to an output terminal through an inductive component (L 2 ; L 3 ), and wherein said output terminal is electrically connected to earth through a smoothing capacitor (C 4 ; C 6 ).

Claim 7

A voltage converter comprising: a) a transformer coupling; b) a primary circuit comprising at least one primary winding; c) at least one secondary circuit comprising at least one secondary winding; the at least one primary winding being inductively coupled to the at least one secondary winding through the transformer coupling; the at least one primary winding, as regards AC voltage, forming an inductive component; the primary circuit further comprising at least one capacitive component; the at least one secondary winding, as regards AC voltage, forming an inductive component; the at least one secondary circuit further comprising a second inductive component and a capacitive component; the primary circuit being individually tunable to a primary resonance frequency; the at least one secondary circuit being individually tunable to a second resonance frequency; and the primary resonance frequency being substantially similar to the second resonance frequency.

Claim 8

A voltage converter comprising: a) a transformer coupling; b) a primary circuit comprising at least one primary winding; c) at least one secondary circuit comprising at least one secondary winding; the at least one primary winding being inductively coupled to the at least one secondary winding through the transformer coupling; the at least one primary winding, as regards AC voltage, forming an inductive component; the primary circuit further comprising at least one capacitive component; the at least one secondary winding, as regards AC voltage, forming an inductive component; the at least one secondary circuit further comprising a second inductive component and a capacitive component; the primary circuit being individually tunable to a primary resonance frequency; the at least one secondary circuit being individually tunable to a second resonance frequency; and the primary resonance frequency being substantially similar to the second resonance frequency.

Claim 9

A voltage converter according to claim 6 further comprising d) an input terminal electrically associated with the primary circuit; wherein the input terminal is adapted for accepting a DC voltage to generate current flow in the at least one primary winding; the voltage converter further comprising e) a switching circuit for generating a switching frequency for reversing the current flow in the primary winding; and wherein the switching frequency is substantially similar to the primary resonance frequency and the second resonance frequency.

Claim 10

A voltage converter according to claim 7 further comprising f) an output terminal electrically associated with the at least one secondary circuit; and further comprising g) a rectifier and h) a smoother for modifying current induced in the at least one secondary winding so that a DC voltage level applied to the input terminal is converted into a different DC voltage level on the output terminal of the at least one secondary circuit.

Claim 11

A voltage converter according to claim 8 wherein the rectifier includes a diode.

Claim 12

A voltage converter according to claim 8 wherein the smoother includes a capacitor.

Claim 13

A voltage converter according to claim 6 further comprising d) a regulation circuit; wherein the regulation circuit includes an element for sensing a given parameter; wherein the regulation circuit also includes a regulator for controlling an input voltage responsive to the given parameter; and wherein the regulation circuit is tuned to a frequency substantially similar to the primary resonance frequency and the second resonance frequency.

Claim 14

A voltage converter according to claim 11 wherein the given parameter is electromagnetic flux proximate the transformer coupling.