Patent US1766388A successfully refreshed from Google Patents.
Patent US3030196A successfully refreshed from Google Patents.
US4841428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-saturating magnetic amplifier controller
Assignee: Raytheon Co
•
Filing: 1988-03-18
•
Granted: 1989-06-20
•
Expires: 2008-03-18
Abstract
Abstract A magnetic amplifier including a magnetic core having a primary leg, a secondary leg, and a control leg. A primary winding is wound about the primary leg of the magnetic core for generating a non-saturating magnetic AC flux in the magnetic core, and a secondary winding is wound about the secondary leg of the magnetic core. A control winding for conducting DC current is wound about the control leg of the magnetic core for controlling as a function of the DC current, without saturating the magnetic core, the reluctance of the control leg relative to the reluctance of the secondary leg. By controlling the relative reluctance, the amount of magnetic AC flux coupled to the secondary winding is controlled, thereby relative reluctance, the amount of magnetic AC flux econtrolling the output voltage provided by the secondary winding.
Inventors
- 👤 Robert D. Washburn
- 👤 Robert F. McClanahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:40
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/06; H; H01; H01F; H01F29/00; H01F29/14; H01F29/143
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
92 words
A magnetic amplifier comprising: a magnetic core having a primary leg, a secondary leg, and a control leg; a primary winding disposed about said primary leg of said magnetic core for generating a magnetic AC flux in said magnetic core; a secondary winding disposed about said secondary leg of said magnetic core; and a control winding disposed about said control leg of said magnetic core for controlling the reluctance of said control leg relative to the reluctance of said secondary leg, said control being provided without driving said magnetic core into saturation.
Claim 2
Dependent Claim
92 words
A magnetic amplifier comprising: a magnetic core having a primary leg, a secondary leg, and a control leg; a primary winding disposed about said primary leg of said magnetic core for generating a magnetic AC flux in said magnetic core; a secondary winding disposed about said secondary leg of said magnetic core; and a control winding disposed about said control leg of said magnetic core for controlling the reluctance of said control leg relative to the reluctance of said secondary leg, said control being provided without driving said magnetic core into saturation.
Claim 3
Dependent Claim
18 words
The magnetic amplifier of claim 1 wherein said control winding provides control in response to a DC current.
Claim 4
Dependent Claim
26 words
The magnetic amplifier of claim 2 wherein said control leg has a cross-sectional area that is less than one-half the cross-sectional area of said primary leg.
Claim 5
Dependent Claim
16 words
The magnetic amplifier of claim 3 wherein said control leg does not have an air gap.
Claim 6
Dependent Claim
14 words
The magnetic amplifier of claim 4 wherein said secondary leg includes an air gap.
Claim 7
Dependent Claim
25 words
The magnetic amplifier of claim 5 wherein said primary leg includes an air gap that is smaller than the air gap of said secondary leg.
Claim 8
Dependent Claim
30 words
The magnetic amplifier of claim 3 wherein said magnetic core includes first and second parallel magnetic elements, wherein each leg comprises first and second corresponding portions of said magnetic elements.
Claim 9
Dependent Claim
21 words
The magnetic amplifier of claim 7 wherein said control winding is counter wound about the parallel portions of said control leg.
Claim 10
Dependent Claim
28 words
The magnetic amplifier of claim 2 wherein said magnetic core includes a second control leg, and further including a second control winding serially connected to said control winding.
Claim 11
Dependent Claim
20 words
The magnetic amplifier of claim 9 wherein said control winding and said second control winding are wound in opposite directions.
Claim 12
Dependent Claim
25 words
The magnetic amplifier of claim 10 wherein said control leg, said second control leg, and said primary leg have substantially the same cross sectional areas.
Claim 13
Dependent Claim
19 words
The magnetic amplifier of claim 11 wherein said control leg and second control leg do not have air gaps.
Claim 14
Dependent Claim
14 words
The magnetic amplifier of claim 12 wherein said secondary leg includes an air gap.
Claim 15
Dependent Claim
25 words
The magnetic amplifier of claim 13 wherein said primary leg includes an air gap that is smaller than the air gap of said secondary leg.
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) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |