Patent US4274046A successfully refreshed from Google Patents.
US4274046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
AC Resonance transformer
Assignee: Maxwell Technologies Inc
•
Filing: 1978-06-19
•
Granted: 1981-06-16
•
Expires: 1998-06-19
Abstract
Abstract An a.c. Resonance Transformer for operating at a predetermined frequency. The transformer comprises a resonant π-type or T-type stage. The π-type stage includes three series connected four-terminal networks. The first of the networks and the third of the networks includes a shunt reactor of a first type. The second of the networks includes two series connected second type reactors and a first type reactor shunt connected to the junction between the second type reactors. The reactors in the second of the networks are sized so that when an input signal of a predetermined frequency is applied to the input of the first of the networks, a 180° phase shift is provided between the phase angle of the input and output voltage vectors of the second of the networks and so that a zero input impedance is provided when the output is short circuited.
Inventors
- 👤 John L. Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:00
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/06
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
146 words
An a.c. resonance transformer for operating at a predetermined frequency, comprising a first resonant stage including a first four terminal network, a second four terminal network connected to the output of said first network, and a third four terminal network connected to the output of said second network, said first and said third networks each including a shunt reactor of a first type, said second network including two series connected second type reactors and a first type reactor shunt connected to the junction between said second type reactor, and means for applying said predetermined frequency to the input of said first network, the reactors in said second network having values such as to provide a 180° phase shift at said predetermined frequency between the phase angle of its input and output voltage vectors and to provide a zero input impedance when its output is short circuited.
Claim 2
Dependent Claim
146 words
An a.c. resonance transformer for operating at a predetermined frequency, comprising a first resonant stage including a first four terminal network, a second four terminal network connected to the output of said first network, and a third four terminal network connected to the output of said second network, said first and said third networks each including a shunt reactor of a first type, said second network including two series connected second type reactors and a first type reactor shunt connected to the junction between said second type reactor, and means for applying said predetermined frequency to the input of said first network, the reactors in said second network having values such as to provide a 180° phase shift at said predetermined frequency between the phase angle of its input and output voltage vectors and to provide a zero input impedance when its output is short circuited.
Claim 3
Dependent Claim
26 words
A resonance transformer in accordance with claim 1 wherein said second type of reactor is an inductor and said first type of reactor is a capacitor.
Claim 4
Dependent Claim
103 words
A resonance transformer in accordance with claim 2 wherein means are provided to connect a load across the series connected inductors; wherein the first series connected inductor has an inductance equal to ##EQU8## the second series connected inductor has an inductance equal to G s /C 2 ω 2 , and the shunt capacitor in the second network has a capacitance equal to G s /L 2 ω 2 where: G s is equal to the desired voltage gain of the stage; ω is equal to 2π times the input frequency; and L 2 is the inductance of the second series connected inductor.
Claim 5
Dependent Claim
60 words
A resonance transformer in accordance with claim 2 wherein said shunt reactors in said first and said third network are capacitors, the capacitor in said first network having a value preselected to provide a desired power factor of said stage, the capacitor in said third network having a value preselected to provide a minimum of energy storage in said stage.
Claim 6
Dependent Claim
67 words
A resonance transformer in accordance with claim 4 wherein the shunt capacitor in said first network has a capacitance equal to 1/L 1 ω 2 , and the shunt capacitor in said third network has a capacitance equal to 1/L 2 ω 2 where: L 1 is the inductance of the first series connected inductor and L 2 is the inductance of the second series connected inductor.
Claim 7
Dependent Claim
67 words
A resonance transformer in accordance with claim 3 wherein the shunt capacitor in said first network has a capacitance equal to 1/L 1 ω 2 , and the shunt capacitor in said third network has a capacitance equal to 1/L 2 ω 2 where: L 1 is the inductance of the first series connected inductor and L 2 is the inductance of the second series connected inductor.
Claim 8
Dependent Claim
45 words
A resonance transformer in accordance with claim 1 wherein a second resonant stage having the same type of construction as said first stage is coupled as a load to said first stage, the input of said second stage being coupled across said series connected reactors.
Claim 9
Dependent Claim
45 words
A resonance transformer in accordance with claim 3 wherein a second resonant stage having the same type of construction as said first stage is coupled as a load to said first stage, the input of said second stage being coupled across said series connected reactors.
Claim 10
Dependent Claim
45 words
A resonance transformer in accordance with claim 6 wherein a second resonant stage having the same type of construction as said first stage is coupled as a load to said first stage, the input of said second stage being coupled across said series connected reactors.
Claim 11
Dependent Claim
69 words
A resonance transformer in accordance with claim 1 wherein a plurality of resonant stages having the same type of construction as said first stage are coupled in series with the input of a succeeding stage being coupled to the output of a preceding stage, which output it taken across the shunt reactor of the third network, and wherein a load is coupled across the output of the last stage.
Claim 12
Dependent Claim
69 words
A resonance transformer in accordance with claim 4 wherein a plurality of resonant stages having the same type of construction as said first stage are coupled in series with the input of a succeeding stage being coupled to the output of a preceding stage, which output is taken across the shunt reactor of the third network, and wherein a load is coupled across the output of the last stage.
Claim 13
Dependent Claim
89 words
A resonance transformer in accordance with claim 1 wherein a plurality of resonant stages having the same type of construction as said first stage are coupled in series with the input of a succeeding stage being coupled to the output of a preceding stage and with second networks of alternate stages being inverted, whereby the reactors of said first networks and said third networks are coupled in series by said series reactors of said second networks, and wherein a load is coupled in series with said series coupled reactors.
Claim 14
Dependent Claim
89 words
A resonance transformer in accordance with claim 2 wherein a plurality of resonant stages having the same type of construction as said first stage are coupled in series with the input of a succeeding stage being coupled to the output of a preceding stage and with second networks of alternate stages being inverted, whereby the reactors of said first networks and said third networks are coupled in series by said series reactors of said second networks, and wherein a load is coupled in series with said series coupled reactors.
Claim 15
Dependent Claim
109 words
An A-C resonance transformer for operating at a predetermined frequency, comprising a first resonant stage including two T-type circuits, each of said circuits including two series connected first type reactors and a second type reactor shunt connected to the junction between said first type reactors, and means for applying said predetermined frequency to the input of said first π-type circuit, the reactors in said T-type circuits having values such as to provide a 180° phase shift at said predetermined frequency between the phase angle of the input and output voltage vectors of said stage and to provide a zero input impedance when output of said stage is short circuited.
Claim 16
Dependent Claim
109 words
An A-C resonance transformer for operating at a predetermined frequency, comprising a first resonant stage including two T-type circuits, each of said circuits including two series connected first type reactors and a second type reactor shunt connected to the junction between said first type reactors, and means for applying said predetermined frequency to the input of said first π-type circuit, the reactors in said T-type circuits having values such as to provide a 180° phase shift at said predetermined frequency between the phase angle of the input and output voltage vectors of said stage and to provide a zero input impedance when output of said stage is short circuited.
Claim 17
Dependent Claim
26 words
A resonance transformer in accordance with claim 14 wherein said first type of reactor is an inductor and said second type of reactor is a capacitor.
Claim 18
Dependent Claim
112 words
A resonance transformer in accordance with claim 15 wherein means are provided to connect a load across the series connected inductors; wherein the first series connected inductor has an inductance L 1 equal to L 3 , the shunt connected capacitor of the first circuit has a capacitance C 1 equal to 1/L 1 ω 2 , and the shunt capacitor in the second circuit has a capacitance C 2 equal to C 1 /(G s -1) where: G s is equal to the desired voltage gain of the stage; ω is equal to 2 π times the input frequency; and L 3 is the inductance of the last series connected inductor.
Claim 19
Dependent Claim
40 words
A resonance transformer in accordance with claim 16 wherein the output inductor of the first circuit and the input inductor of the second circuit have a total inductance such as to provide a minimum of energy storage in said stage.
Claim 20
Dependent Claim
20 words
A resonance transformer in accordance with claim 15 wherein the total inductance is equal to inductance of the two inductors.
Claim 21
Dependent Claim
45 words
A resonance transformer in accordance with claim 15 wherein a second resonant stage having the same type of construction as said first stage is coupled as a load to said first stage, the input of said second stage being coupled across said series connected reactors.
Claim 22
Dependent Claim
45 words
A resonance transformer in accordance with claim 16 wherein a second resonant stage having the same type of construction as said first stage is coupled as a load to said first stage, the input of said second stage being coupled across said series connected reactors.
Claim 23
Dependent Claim
45 words
A resonance transformer in accordance with claim 17 wherein a second resonant stage having the same type of construction as said first stage is coupled as a load to said first stage, the input of said second stage being coupled across said series connected reactors.
Claim 24
Dependent Claim
77 words
A resonance transformer in accordance with claim 14 wherein a plurality of resonant stages having the same type of construction as said first stage are coupled in series with the input of a succeeding stage being coupled to the output of a preceding stage and with alternate stages being inverted, which output is in series with the second series reactor of the second circuit, and wherein a load is coupled across the output of the last stage.
Claim 25
Dependent Claim
77 words
A resonance transformer in accordance with claim 15 wherein a plurality of resonant stages having the same type of construction as said first stage are coupled in series with the input of a succeeding stage being coupled to the output of a preceding stage and with alternate stages being inverted, which output is in series with the second series reactor of the second circuit, and wherein a load is coupled in series with said series connected stages.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |