US4378522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable current source
Assignee: Individual
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Filing: 1981-04-30
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Granted: 1983-03-29
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Expires: 2001-04-30
Abstract
Abstract An adjustable current source comprises a choke (1) and a capacitor (2) whose reactive impedances are equal at the frequency of a variable voltage source (3), as well as a load current matching and adjusting unit made as a magnetic amplifier (4). Some outputs of the choke (1), the capacitor (2) and a primary winding (6, 7) of the magnetic amplifier (4) are coupled to respective phases of the variable voltage source (3). Other outputs of the choke (1), the capacitor (2) and the primary winding (6,7) of the magnetic amplifier (4) are joined in a star connection. The secondary winding (9, 10) of the magnetic amplifier (4) is coupled to the load (11). The control winding (13) of the magnetic amplifier (4) is coupled to a constant voltage source (14).
Inventors
- 👤 Robert N. Suladze
- 👤 Kirill D. Gutterman
- 👤 Medgar N. Gelenidze
- 👤 Ivan I. Navdarashvili
- 👤 Guram G. Shvangiradze
- 👤 Revaz A. Grigolishvili
- 👤 Zurab G. Tadumadze
- 👤 Ramaz G. Kiknadze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:53
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
An adjustable current source comprising a choke and a capacitor whose reactive impedances are equal at the frequency of a variable voltage source, some outputs thereof being connected to two respective phases of the variable voltage source, the third phase thereof being connected to a load current matching and adjusting unit which is jointed to other outputs of the choke and the capacitor in a star connection and also coupled to the load, characterized in that the load current matching and adjusting unit is made as a three-leg magnetic amplifier (4) joined in a star connection by the primary winding thereof (6,7) and coupled to the load (11) by the secondary winding (9, 10) thereof, and also provided is a constant voltage source (14) coupled to a control winding (12).
Claim 2
Dependent Claim
130 words
An adjustable current source comprising a choke and a capacitor whose reactive impedances are equal at the frequency of a variable voltage source, some outputs thereof being connected to two respective phases of the variable voltage source, the third phase thereof being connected to a load current matching and adjusting unit which is jointed to other outputs of the choke and the capacitor in a star connection and also coupled to the load, characterized in that the load current matching and adjusting unit is made as a three-leg magnetic amplifier (4) joined in a star connection by the primary winding thereof (6,7) and coupled to the load (11) by the secondary winding (9, 10) thereof, and also provided is a constant voltage source (14) coupled to a control winding (12).
Claim 3
Dependent Claim
107 words
An adjustable current source as claimed in claim 1, characterized in that the control winding (12) of the three-leg magnetic amplifier (4) is arranged on a middle leg (13), the primary winding is made up of two components (6 and 7) arranged on outer legs (8) and connected together so that electromotive forces induced thereby in the control winding (12) balance out, the secondary winding is also made up of two components (9 and 10) arranged on the outer legs (8) of the three-leg core (5) of the magnetic amplifier (4) and are joined so that electromotive forces induced therein by the primary winding are added together.
Claim 4
Dependent Claim
109 words
An adjustable current source as claimed in claim 1, characterized in that the secondary winding (24) of the three-leg magnetic amplifier (17) is arranged on the middle leg (25) thereof, the primary winding is made up of two components (20, 21) arranged on the outer legs (19) and connected to each other so that electromotive forces induced thereby in the secondary winding (24) are added together, the control winding is also composed of two components (22 and 23) arranged on the outer legs (19) of the magnetic amplifier (17) and connected to each other so that electromotive forces induced therein by the primary winding (20, 21) are balanced out.
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) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |