Regulating and filtering transformer

Claim 2

A regulating transformer, comprising: a magnetic core having first, second and third regions, means interconnecting said first, second and third regions to provide closed magnetic paths, means including an input winding, providing a first AC flux in said first region, means including an output winding and a capacitor connected in parallel to provide a resonant tank circuit, providing a second AC flux in said third region, and means including output terminals, connected to provide an output voltage responsive to the voltage across said output winding, said second region being free of windings, said magnetic core being constructed and dimensioned to cause said first and second AC fluxes to add in said second region, and to saturate said second region during a portion of each half cycle of said second AC flux, said first and third regions being substantially nonsaturating, said second region shunting the major portion of said first AC flux away from said output winding when said second region is unsaturated, the saturation of said second region forcing the major portion of a further increase in said first AC flux to link said output winding, transferring energy into said tank circuit to sustain the oscillation thereof.

Claim 3

The regulating transformer of claim 1 wherein the first, second and third regions of the magnetic core are spaced, parallel leg portions thereof.

Claim 4

The regulating transformer of claim 2 wherein the second region is the inner leg portion.

Claim 5

The regulating transformer of claim 1 wherein the third region includes a linearizing nonmagnetic gap therein.

Claim 6

The regulating transformer of claim 1 wherein the magnetic core is constructed of stacked metallic laminations.

Claim 7

The regulating transformer of claim 1 wherein the magnetic core is constructed of loops of nested metallic laminations.

Claim 8

The regulating transformer of claim 1 wherein the first and third regions extend perpendicularly outward from opposite sides of said second region.

Claim 9

The regulating transformer of claim 1 wherein the magnetic core is of the shell-form-type, including a first member which forms the second region, and second and third members which extend perpendicularly outward from opposite sides of said first member to form the first and third regions, respectively.

Claim 10

A regulating transformer, comprising: a magnetic core having spaced parallel leg portions providing first, second and third regions, with the second region being an outer leg portion, means interconnecting said first, second and third regions to provide closed magnetic paths, means including an input winding, providing a first AC flux in said first region, and means including an output winding and a capacitor connected in parallel to provide a resonant tank circuit, providing a second AC flux in said third region, said second region being free of windings, said first and second AC fluxes adding in said second region, saturating said second region during a portion of each half cycle of said second AC flUx, said first and third regions being substantially nonsaturating, said second region shunting the major portion of said first AC flux away from said output winding when said second region is unsaturated, the saturation of said second region forcing the major portion of a further increase in said first AC flux to link said output winding, transferring energy into said tank circuit to sustain the oscillation thereof.

Claim 11

A regulating transformer, comprising: a magnetic core having spaced parallel leg portions providing first, second and third regions, with the second region being an outer leg portion, means interconnecting said first, second and third regions to provide closed magnetic paths, means including an input winding, providing a first AC flux in said first region, and means including an output winding and a capacitor connected in parallel to provide a resonant tank circuit, providing a second AC flux in said third region, said second region being free of windings, said first and second AC fluxes adding in said second region, saturating said second region during a portion of each half cycle of said second AC flUx, said first and third regions being substantially nonsaturating, said second region shunting the major portion of said first AC flux away from said output winding when said second region is unsaturated, the saturation of said second region forcing the major portion of a further increase in said first AC flux to link said output winding, transferring energy into said tank circuit to sustain the oscillation thereof.

Claim 12

The regulating transformer, comprising: a magnetic core having first, second and third regions, said second region including a nonmagnetic gap therein, the dimensions of which are selected to retain the saturable characteristic thereof, said third region including a linearizing nonmagnetic gap therein, means interconnecting said first, second, and third regions to provide closed magnetic paths, means including an input winding, providing a first AC flux in said first region, and means including an output winding and a capacitor connected to provide a resonant tank circuit, providing a second AC flux in said third region, said second region being free of windings, said first and second AC fluxes adding in said second region, saturating said second region during a portion of each half cycle of said second AC flux, said first and third regions being substantially nonsaturating, said second region shunting the major portion of said first AC flux away from said output winding when said second region is unsaturated, the saturation of said second region forcing the major portion of a further increase in said first AC flux to link said output winding, transferring energy into said tank circuit to sustain the oscillation thereof.

Claim 13

The regulating transformer, comprising: a magnetic core having first, second and third regions, said second region including a nonmagnetic gap therein, the dimensions of which are selected to retain the saturable characteristic thereof, said third region including a linearizing nonmagnetic gap therein, means interconnecting said first, second, and third regions to provide closed magnetic paths, means including an input winding, providing a first AC flux in said first region, and means including an output winding and a capacitor connected to provide a resonant tank circuit, providing a second AC flux in said third region, said second region being free of windings, said first and second AC fluxes adding in said second region, saturating said second region during a portion of each half cycle of said second AC flux, said first and third regions being substantially nonsaturating, said second region shunting the major portion of said first AC flux away from said output winding when said second region is unsaturated, the saturation of said second region forcing the major portion of a further increase in said first AC flux to link said output winding, transferring energy into said tank circuit to sustain the oscillation thereof.

Claim 14

A regulating transformer comprising: a magnetic core including input, output, and common leg portions, an input winding disposed on said input leg portion, adapted for connection to a source of AC potential, an output winding disposed on said output leg portion, said common leg portion being free of windings, a capacitor connected in parallel with said output winding to provide a tank circuit, and means including output terminals connected to provide an output voltage responsive to the voltage across said output winding, said common leg portion being constructed to saturate during a portion of each half cycle of the AC source potential, when said input winding is connected thereto, due to flux produced in said common leg portion by current flowing in said input winding and in said tank circuit, said output leg portion being constructed to be substantially nonsaturating.

Claim 15

A regulating transformer comprising: a magnetic core including input, output, and common leg portions, an input winding disposed on said input leg portion, adapted for connection to a source of AC potential, an output winding disposed on said output leg portion, said common leg portion being free of windings, a capacitor connected in parallel with said output winding to provide a tank circuit, and means including output terminals connected to provide an output voltage responsive to the voltage across said output winding, said common leg portion being constructed to saturate during a portion of each half cycle of the AC source potential, when said input winding is connected thereto, due to flux produced in said common leg portion by current flowing in said input winding and in said tank circuit, said output leg portion being constructed to be substantially nonsaturating.

Claim 16

The regulating transformer of claim 11 wherein the magnetic core is of the core-form-type, with the input and output leg portions being outer legs and the common leg portion being an inner leg.

Claim 17

The regulating transformer of claim 11 wherein the output leg portion has a gap therein having a dimension selected to provide the nonsaturating characteristic of the output leg portion.

Claim 18

The regulating transformer of claim 11 wherein the cross-sectional area of the common leg portion is less than the cross-sectional area of the output leg portion.

Claim 19

A regulating transformer comprising: a magnetic core including input, output, and common leg portions, said common leg portion including a gap therein having a dimension selected to retain the saturating characteristics of the common leg portion, said output leg portion including a gap therein having a dimension selected to provide the nonsaturating characteristic of said output leg portion, an input winding disposed on said input leg portion, adapted for connection to a source of AC potential, an output winding disposed on said output leg portion, adapted for connection to a load circuit, said common leg portion being free of windings, and a capacitor connected across said output winding to provide a tank circuit, said common leg portion being constructed to sAturate during a portion of each half cycle of the AC source potential, when said input winding is connected thereto, due to flux produced in said common leg portion by current flowing in said input winding and in said tank circuit, said output leg portion being constructed to be substantially nonsaturating.

Claim 20

A regulating transformer comprising: a magnetic core including input, output, and common leg portions, said common leg portion including a gap therein having a dimension selected to retain the saturating characteristics of the common leg portion, said output leg portion including a gap therein having a dimension selected to provide the nonsaturating characteristic of said output leg portion, an input winding disposed on said input leg portion, adapted for connection to a source of AC potential, an output winding disposed on said output leg portion, adapted for connection to a load circuit, said common leg portion being free of windings, and a capacitor connected across said output winding to provide a tank circuit, said common leg portion being constructed to sAturate during a portion of each half cycle of the AC source potential, when said input winding is connected thereto, due to flux produced in said common leg portion by current flowing in said input winding and in said tank circuit, said output leg portion being constructed to be substantially nonsaturating.

Claim 21

A regulating transformer comprising: a magnetic core including input, output, and common leg portions, said common and output leg portions each having a gap therein, with the gap in the common leg portion having a substantially smaller dimension than the gap in the output leg portion, an input winding disposed on said input leg portion, adapted for connection to a source of AC potential, an output winding disposed on said output leg portion, adapted for connection to a load circuit, said common leg portion being free of windings, and a capacitor connected across said output winding to provide a tank circuit, said common leg portion being constructed to saturate during a portion of each half cycle of the AC source potential, when said input winding is connected thereto, due to flux produced in said common leg portion by current flowing in said input winding and in said tank circuit, said output leg portion being constructed to be substantially nonsaturating.

Claim 22

A regulating transformer comprising: a magnetic core including input, output, and common leg portions, said common and output leg portions each having a gap therein, with the gap in the common leg portion having a substantially smaller dimension than the gap in the output leg portion, an input winding disposed on said input leg portion, adapted for connection to a source of AC potential, an output winding disposed on said output leg portion, adapted for connection to a load circuit, said common leg portion being free of windings, and a capacitor connected across said output winding to provide a tank circuit, said common leg portion being constructed to saturate during a portion of each half cycle of the AC source potential, when said input winding is connected thereto, due to flux produced in said common leg portion by current flowing in said input winding and in said tank circuit, said output leg portion being constructed to be substantially nonsaturating.

Claim 23

A regulating transformer comprising: a magnetic core including input, output, and common leg portions, said magnetic core being of the shell-form-type, including first and second intersecting crossed members, the adjacent ends of which are interconnected to define four window openings, with each of said crossed members having first and second portions which extend outwardly from opposite sides of the other crossed member, and wherein the input and output leg portions are provided by the first and second portions of said first crossed member, and said common leg portion is provided by the first and second portions of said second crossed member, an input winding disposed on said input leg portion, adapted for connection to a source of AC potential, an output winding disposed on said output leg portion adapted for connection to a load circuit, said common leg portion being free of windings, and a capacitor connected across said output winding to provide a tank circuit, said common leg portion being constructed to saturate during a portion of each half cycle of the AC source potential, when said input winding is connected thereto, due to flux produced in said common leg portion by current flowing in said input winding and in said tank circuit, said output leg portion being constructed to be substantially nonsaturating.

Claim 24

A regulating transformer comprising: a magnetic core including input, output, and common leg portions, said magnetic core being of the shell-form-type, including first and second intersecting crossed members, the adjacent ends of which are interconnected to define four window openings, with each of said crossed members having first and second portions which extend outwardly from opposite sides of the other crossed member, and wherein the input and output leg portions are provided by the first and second portions of said first crossed member, and said common leg portion is provided by the first and second portions of said second crossed member, an input winding disposed on said input leg portion, adapted for connection to a source of AC potential, an output winding disposed on said output leg portion adapted for connection to a load circuit, said common leg portion being free of windings, and a capacitor connected across said output winding to provide a tank circuit, said common leg portion being constructed to saturate during a portion of each half cycle of the AC source potential, when said input winding is connected thereto, due to flux produced in said common leg portion by current flowing in said input winding and in said tank circuit, said output leg portion being constructed to be substantially nonsaturating.

Claim 25

A regulating transformer comprising: a magnetic core including input, output, and common leg portions, said magnetic core being of the shell-form-type, including first and second intersecting crossed members, the adjacent ends of which are interconnected to define four window openings and a plurality of magnetic paths, with each of said crossed members having first and second portions which extend outwardly from opposite sides of the other crossed member, said input and output leg portions being provided by the first and second portions of said first crossed member, and said common leg portion being provided by the first and second portions of said second crossed member, the magnetic paths which include the second portion of the first crossed member having a nonmagnetic gap therein, an input winding disposed on said input leg portion, adapted for connection to a source of AC potential, an output winding disposed on said output leg portion, adapted for connection to a load circuit, said common leg portion being free of windings, and a capacitor connected across said output winding to provide a tank circuit, said common leg portion being constructed to saturate during a portion of each half cycle of the AC source potential, when said input winding is connected thereto, duE to flux produced in said common leg portion by current flowing in said input winding and in said tank circuit, said output leg portion being constructed to be substantially nonsaturating.

Claim 26

A regulating transformer comprising: a magnetic core including input, output, and common leg portions, said magnetic core being of the shell-form-type, including first and second intersecting crossed members, the adjacent ends of which are interconnected to define four window openings and a plurality of magnetic paths, with each of said crossed members having first and second portions which extend outwardly from opposite sides of the other crossed member, said input and output leg portions being provided by the first and second portions of said first crossed member, and said common leg portion being provided by the first and second portions of said second crossed member, the magnetic paths which include the second portion of the first crossed member having a nonmagnetic gap therein, an input winding disposed on said input leg portion, adapted for connection to a source of AC potential, an output winding disposed on said output leg portion, adapted for connection to a load circuit, said common leg portion being free of windings, and a capacitor connected across said output winding to provide a tank circuit, said common leg portion being constructed to saturate during a portion of each half cycle of the AC source potential, when said input winding is connected thereto, duE to flux produced in said common leg portion by current flowing in said input winding and in said tank circuit, said output leg portion being constructed to be substantially nonsaturating.

Claim 27

A regulating transformer, comprising: a magnetic core including only first, second, and third magnetic paths, said first and second magnetic paths having a single leg portion common to both, said first and second magnetic paths being substantially nonsaturating except for their common leg portion, said third magnetic path including the nonsaturating portions of said first and second magnetic paths, means including an input winding providing an AC flux in the first magnetic path, means including an output winding and a capacitor providing an AC flux in the second magnetic path which adds to the flux of the first magnetic path in said common leg portion, driving said common leg portion into saturation during each half cycle of the AC flux in the first magnetic path, to efficiently couple the input and output windings through the third magnetic path only during this time, said output winding and capacitor being connected in parallel to provide a tank circuit which oscillates at the frequency of the AC flux in the first magnetic circuit to provide a stable voltage across said output winding, with the energy for sustaining the oscillation of the tank circuit being transferred from the input winding when the common leg portion saturates, and means including output terminals connected to provide an output voltage responsive to the stable voltage across said output winding.

Claim 28

A regulating transformer, comprising: a magnetic core including only first, second, and third magnetic paths, said first and second magnetic paths having a single leg portion common to both, said first and second magnetic paths being substantially nonsaturating except for their common leg portion, said third magnetic path including the nonsaturating portions of said first and second magnetic paths, means including an input winding providing an AC flux in the first magnetic path, means including an output winding and a capacitor providing an AC flux in the second magnetic path which adds to the flux of the first magnetic path in said common leg portion, driving said common leg portion into saturation during each half cycle of the AC flux in the first magnetic path, to efficiently couple the input and output windings through the third magnetic path only during this time, said output winding and capacitor being connected in parallel to provide a tank circuit which oscillates at the frequency of the AC flux in the first magnetic circuit to provide a stable voltage across said output winding, with the energy for sustaining the oscillation of the tank circuit being transferred from the input winding when the common leg portion saturates, and means including output terminals connected to provide an output voltage responsive to the stable voltage across said output winding.

Claim 29

The regulating transformer of claim 19 wherein the second magnetic path has a gap therein in the nonsaturating portion thereof.

Claim 30

The regulating transformer of claim 20 wherein the common leg portion has a gap therein having a dimension selected to retain the saturating characteristics of the common leg portion.