US5126715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-profile multi-pole conductive film transformer
Assignee: Lockheed Martin Corp
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Filing: 1990-07-02
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Granted: 1992-06-30
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Expires: 2010-07-02
Abstract
Abstract A folded conductive film winding transformer provides a plurality of poles and enables increased turns ratios or power handling capacity in structures which must meet severe height limitations.
Inventors
- 👤 Alexander J. Yerman
- 👤 Waseem A. Roshen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:43
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/2804; H01F30/00; H01F30/06; H01F30/10; H01F27/2847; H01F2027/2861
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
155 words
In a magnetic component of the type including an elongated conductive film having first and second major surfaces, said film having a generally serpentine configuration when said first major surface is disposed in a plane and in which said film is folded upon itself to form a stack of a plurality of layers which provide a winding which includes at least one turn about a magnetic pole, the improvement comprising: said conductive film configured and folded to provide a plurality of pairs of spaced apart magnetic poles, each of which is encircled by current flowing lengthwise in said film, the current in adjacent poles flowing in opposite directions, said conductive film further being configured and folded so that substantially the same flux weaves through each of said magnetic poles in a series fashion, said conductive film still further being configured and folded to have winding turn connections integral therewith, thereby avoiding the use of vias.
Claim 2
Dependent Claim
155 words
In a magnetic component of the type including an elongated conductive film having first and second major surfaces, said film having a generally serpentine configuration when said first major surface is disposed in a plane and in which said film is folded upon itself to form a stack of a plurality of layers which provide a winding which includes at least one turn about a magnetic pole, the improvement comprising: said conductive film configured and folded to provide a plurality of pairs of spaced apart magnetic poles, each of which is encircled by current flowing lengthwise in said film, the current in adjacent poles flowing in opposite directions, said conductive film further being configured and folded so that substantially the same flux weaves through each of said magnetic poles in a series fashion, said conductive film still further being configured and folded to have winding turn connections integral therewith, thereby avoiding the use of vias.
Claim 3
Dependent Claim
16 words
The improvement recited in claim 1 wherein: said conductive film is bonded to a dielectric membrane.
Claim 4
Dependent Claim
35 words
The improvement recited in claim 2 wherein: said conductive film is bonded to both sides of said membrane and configured to provide a full winding turn about each pole on each fold of said membrane.
Claim 5
Dependent Claim
27 words
The improvement recited in claim 1 wherein: half of said poles are of one polarity and the other half of said poles are of the opposite polarity.
Claim 6
Dependent Claim
13 words
The improvement recited in claim 1 wherein: said winding creates four magnetic poles.
Claim 7
Dependent Claim
18 words
The improvement recited in claim 1 wherein: said conductive film is folded to form a plurality of stacks.
Claim 8
Dependent Claim
27 words
The improvement recited in claim 6 wherein: half of said poles are of one polarity and the other half of said poles are of the opposite polarity.
Claim 9
Dependent Claim
13 words
The improvement recited in claim 6 wherein: said winding creates four magnetic poles.
Claim 10
Dependent Claim
54 words
The improvement recited in claim 1 wherein said magnetic component further includes: a second winding comprising a second conductive film; said second conductive film being disposed in said stack, said second conductive film being configured to provide an equal plurality of spaced apart magnetic poles coincident with the first recited plurality of magnetic poles.
Claim 11
Dependent Claim
23 words
The improvement recited in claim 9 wherein: said second conductive film includes a terminal extension which extends beyond the edge of said stack.
Claim 12
Dependent Claim
23 words
The improvement recited in claim 10 wherein: said terminal extension of said second conductive films is disposed along the side of said stack.
Claim 13
Dependent Claim
65 words
The improvement recited in claim 1 wherein said magnetic component further includes: a second winding comprising a plurality of separate, second conductive films; said second conductive films being interleaved with said layers of the first recited film in said stack, said second conductive films being configured to provide an equal plurality of spaced apart magnetic poles coincident with the first recited plurality of magnetic poles.
Claim 14
Dependent Claim
38 words
The improvement recited in claim 12 further comprising: terminal means electrically connecting corresponding portions of different ones of said second conductive films to form a secondary winding comprising a plurality of said second conductive films connected in parallel.
Claim 15
Dependent Claim
23 words
The improvement recited in claim 13 wherein: said terminal means comprise extensions of said second conductive films beyond the edges of said stack.
Claim 16
Dependent Claim
23 words
The improvement recited in claim 14 wherein: said terminal extensions of said second conductive films are disposed along the sides of said stack.
Claim 17
Dependent Claim
23 words
The improvement recited in claim 14 wherein: corresponding ones of said terminal extensions are bonded together, as an external terminal of said winding.
Claim 18
Dependent Claim
59 words
The improvement recited in claim 1 wherein said component further includes: a plurality of second conductive films; said second conductive films being interleaved with said layers of the first recited film in said stack, said second conductive films being configured to provide an equal plurality of spaced apart magnetic poles coincident with the first recited, plurality of magnetic poles.
Claim 19
Dependent Claim
35 words
The improvement recited in claim 17 wherein said component further comprises: terminal means selectively connecting said second conductive films to form a secondary winding comprising a plurality of said second conductive films connected in parallel.
Claim 20
Dependent Claim
23 words
The improvement recited in claim 18 wherein: said terminal means comprise extensions of said second conductive films beyond the edges of said stack.
Claim 21
Dependent Claim
23 words
The improvement recited in claim 19 wherein: said terminal extensions of said second conductive films are disposed along the sides of said stack.
Claim 22
Dependent Claim
23 words
The improvement recited in claim 19 wherein: corresponding ones of said terminal extensions are bonded together as an external terminal of said winding.
References Cited (Backward Citations)
US3002260A
Cited
US2921165A
Cited
US3495327A
Cited
US3483499A
Cited
US4342143A
Cited
JPS58140104A
Cited
US4641114A
Cited
US4803453A
Cited
US4862129A
Cited
US4959630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-30 | 1995-12-30 | 1996-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-30 | 1999-12-30 | 2000-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-30 | 2003-12-30 | 2004-06-30 | $7700.00 | Window Closed / Lapsed |