US4437052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static VAR generator
Assignee: ASEA BROWN BOVERI Inc
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Filing: 1981-12-17
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Granted: 1984-03-13
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Expires: 2001-12-17
Abstract
Abstract There is provided a static VAR generator generally comprised of a fixed capacitor bank and a first and second switched conductor bank whereby said second switched inductor bank is operated at voltages leading the first inductor bank by 30 electrical degrees to allow the VAR generator to adjust its output current twice in each half cycle of operation.
Inventors
- 👤 Laszlo Gyugyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:19
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/18; H02J3/1821; H02J3/1835; H02J3/1864; H02M; H02M5/00; Y; Y02; Y02E; Y02E40/00; Y02E40/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
150 words
A static VAR generator, comprising: (a) a capacitive current means disposed for connection into an AC network; (b) a first inductive current means disposed for connection into said AC network; (c) a second inductive current means disposed for connection into said AC network; (d) a VAR monitoring means for monitoring the reactive requirement of said AC network; (e) a first control means connected to said first inductive current means, and said VAR monitoring means in phase with the AC network voltage for controlling connection of said first inductive current means into the AC network in response to the reactive requirements of said AC network; and (f) a phase shifting means connected to said second inductive current means and a second control means responsive to the phase shifting means for controlling connection of said second inductive current means at a voltage phase angle leading the voltage of said first control means.
Claim 2
Dependent Claim
150 words
A static VAR generator, comprising: (a) a capacitive current means disposed for connection into an AC network; (b) a first inductive current means disposed for connection into said AC network; (c) a second inductive current means disposed for connection into said AC network; (d) a VAR monitoring means for monitoring the reactive requirement of said AC network; (e) a first control means connected to said first inductive current means, and said VAR monitoring means in phase with the AC network voltage for controlling connection of said first inductive current means into the AC network in response to the reactive requirements of said AC network; and (f) a phase shifting means connected to said second inductive current means and a second control means responsive to the phase shifting means for controlling connection of said second inductive current means at a voltage phase angle leading the voltage of said first control means.
Claim 3
Dependent Claim
27 words
A static VAR generator as recited in claim 1 wherein said voltage phase angle leading the voltage of said first control means is approximately 30 electrical degrees.
Claim 4
Dependent Claim
69 words
A static VAR generator as recited in claim 1 wherein said phase shifting means is generally comprised of an auto-transformer having a primary connected to said AC network and a secondary connected to said second control means and said second inductive current means whereby said second control means controls connection of said second inductive current means at a voltage phase angle leading the voltage of said first control means.
Claim 5
Dependent Claim
27 words
A static VAR generator as recited in claim 3 wherein said voltage phase angle leading the voltage of said first control means is approximately 30 electrical degrees.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |