Patent US3975673A successfully refreshed from Google Patents.
US3975673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase shifter
Assignee: Individual
•
Filing: 1975-07-21
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Granted: 1976-08-17
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Expires: 1995-07-21
Abstract
Abstract A phase shifter comprises a three-phase transformer and a reactor to obtain two three-phase output voltage sets, the phase angle therebetween being set equal to 0°, 120° or 180°. Depending on the load, the proposed phase shifter makes it possible, with its transformer or reactor control windings shorted, to switch over a controlled power transmission system of high power-carrying capacity from operation with a phase angle of 0° to operation with a phase angle of 120° or 180°.
Inventors
- 👤 Valery Anatolievich Boshnyaga
- 👤 Lev Pavlovich Kalinin
- 👤 Vitaly Mikhailovich Postolaty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:17
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/18; H02J3/1878; G; G05; G05F; G05F1/00; Y; Y02; Y02E; Y02E40/00; Y02E40/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
185 words
A phase shifter comprising: at least one three-phase transformer; primary windings, two secondary windings and control windings of said three-phase transformer; a beginning and an end of each said primary winding of said three-phase transformer; both said secondary windings of said three-phase transformer having a common point; a reactor; power and control windings of said reactor; a beginning and an end of each said power winding of said reactor; said ends of all said power windings of said reactor being connected to a common neutral point; said beginning of each said power winding of said reactor having connected thereto said common point of two respective secondary windings of said three-phase transformer as well as said end of a respective primary winding, thus providing for two three-phase output voltage sets; the phase of the voltages across said two secondary windings of said three-phase transformer differing from that of the voltage across said power winding of said reactor; switching devices for setting the required phase angle between said three-phase output voltage sets; said control windings of said three-phase transformer and reactor being connected to respective switching devices.
Claim 2
Dependent Claim
185 words
A phase shifter comprising: at least one three-phase transformer; primary windings, two secondary windings and control windings of said three-phase transformer; a beginning and an end of each said primary winding of said three-phase transformer; both said secondary windings of said three-phase transformer having a common point; a reactor; power and control windings of said reactor; a beginning and an end of each said power winding of said reactor; said ends of all said power windings of said reactor being connected to a common neutral point; said beginning of each said power winding of said reactor having connected thereto said common point of two respective secondary windings of said three-phase transformer as well as said end of a respective primary winding, thus providing for two three-phase output voltage sets; the phase of the voltages across said two secondary windings of said three-phase transformer differing from that of the voltage across said power winding of said reactor; switching devices for setting the required phase angle between said three-phase output voltage sets; said control windings of said three-phase transformer and reactor being connected to respective switching devices.
Claim 3
Dependent Claim
50 words
A phase shifter as claimed in claim 1, wherein the phases of the voltages across two respective secondary windings of said three-phase transformer concide and follow the phase of the voltage across a respective power winding of said reactor in a preset phase alternation sequence in said power transmission system.
Claim 4
Dependent Claim
42 words
A phase shifter as claimed in claim 1, wherein the phases of the voltages across two respective windings of said three-phase transformer are different from each other and from the phase of the voltage across a respective power winding of said reactor.
Claim 5
Dependent Claim
48 words
A phase shifter as claimed in claim 1, comprising third and fourth secondary windings of said three-phase transformer; a beginning and an end of each said third and fourth winding; said ends of said third and fourth windings being connected to said ends of two said secondary windings.
Claim 6
Dependent Claim
48 words
A phase shifter as claimed in claim 3, comprising third and fourth secondary windings of said three-phase transformer; a beginning and an end of each said third and fourth winding; said ends of said third and fourth windings being connected to said ends of two said secondary windings.
Claim 7
Dependent Claim
25 words
A phase shifter as claimed in claim 1, wherein the number of turns in said primary and secondary windings of said three-phase transformer is different.
Claim 8
Dependent Claim
25 words
A phase shifter as claimed in claim 2, wherein the number of turns in said primary and secondary windings of said three-phase transformer is different.
Claim 9
Dependent Claim
25 words
A phase shifter as claimed in claim 3, wherein the number of turns in said primary and secondary windings of said three-phase transformer is different.
Claim 10
Dependent Claim
25 words
A phase shifter as claimed in claim 4, wherein the number of turns in said primary and secondary windings of said three-phase transformer is different.
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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |