US4977491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency transformer with a printed circuit winding in particular for a very high voltage power supply
Assignee: Thales SA
•
Filing: 1988-11-18
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Granted: 1990-12-11
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Expires: 2008-11-18
Abstract
Abstract A high frequency transformer is made on a magnetic circuit which can be of a generally square shape. The secondary windings are made on printed circuit plates, separated by insulators and traversed perpendicularly by the core or cores of the magnetic circuit. The primary winding can be wound directly on such a core. The transformer is applicable in particular to high frequency very high voltage power supplies, in particular of the type termed "flyback" power supplies.
Inventors
- 👤 Jean-Pierre Domenget
- 👤 Gerard Lorec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:35
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/2804; H01F27/2809; H01F27/30; H01F27/306; H01F27/32; H01F27/327
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
159 words
A high frequency transformer comprising: (a) a magnetic circuit including at least two generally parallel cores connected by polar pieces; (b) at least one primary winding wound directly on one of said two parallel cores; (c) means for driving said primary winding; (d) a plurality of separate secondary windings magnetically coupled to said primary winding to generate output voltages and comprising flat conductors deposited on an insulating substrate, said insulating substrate carrying two of said secondary windings, each one of said two of said secondary windings being disposed respectively and generally perpendicularly to and around a respective one of said two parallel cores; (e) electrical circuit means coupled to said secondary windings for providing an output voltage in response to driving of said primary winding; and (f) a resin block uniting the secondary windings and extending around the cores with a cross-section corresponding to the dimensions of the parallel cores of the magnetic circuit fitted with the primary winding.
Claim 2
Dependent Claim
159 words
A high frequency transformer comprising: (a) a magnetic circuit including at least two generally parallel cores connected by polar pieces; (b) at least one primary winding wound directly on one of said two parallel cores; (c) means for driving said primary winding; (d) a plurality of separate secondary windings magnetically coupled to said primary winding to generate output voltages and comprising flat conductors deposited on an insulating substrate, said insulating substrate carrying two of said secondary windings, each one of said two of said secondary windings being disposed respectively and generally perpendicularly to and around a respective one of said two parallel cores; (e) electrical circuit means coupled to said secondary windings for providing an output voltage in response to driving of said primary winding; and (f) a resin block uniting the secondary windings and extending around the cores with a cross-section corresponding to the dimensions of the parallel cores of the magnetic circuit fitted with the primary winding.
Claim 3
Dependent Claim
29 words
A transformer according to claim 1, comprising a plurality of insulating substrates carrying said secondary windings wherein said insulating substrates are flat and are separated by electrically insulating plates.
Claim 4
Dependent Claim
49 words
A transformer according to claim 1, having a plurality of insulating substrates wherein each substrate includes means for receiving the parallel cores of the magnetic circuit, and support two of said secondary windings which are substantially concentric with the means for receiving the parallel cores of the magnetic circuit.
Claim 5
Dependent Claim
49 words
A transformer according to claim 3, wherein the insulating substrate is flat and each secondary winding comprises several turns formed on one side of the substrate and wherein an end of said secondary winding is connected to a return conductor on the other side of the flat insulating substrate.
Claim 6
Dependent Claim
23 words
A transformer according to claim 3, wherein the two secondary windings of one and the same substrate are connected in series before rectification.
Claim 7
Dependent Claim
16 words
A transformer according to claim 1, wherein said insulating substrates are of the printed circuit type.
Claim 8
Dependent Claim
16 words
A transformer according to claim 1, wherein said insulating substrates are of the hybrid circuit type.
Claim 9
Dependent Claim
22 words
A transformer as in claim 1, wherein said electrical circuit means comprises means to add the output voltage of said secondary windings.
Claim 10
Dependent Claim
125 words
A high frequency transformer comprising: (a) a magnetic circuit including at least two generally parallel cores connected by polar pieces; (b) at least one primary winding wound directly on one of said two parallel cores; (c) means for driving said primary winding; (d) a plurality of separate secondary windings magnetically coupled to said primary winding to generate output voltages and comprising flat conductors deposited on an insulating substrate, said insulating substrate carrying two of said secondary windings, each one of said two of said secondary windings being disposed respectively and generally perpendicularly to and around a respective one of said two parallel cores; (e) electrical circuit means coupled to said secondary windings for providing an output voltage in response to driving of said primary winding.
Claim 11
Dependent Claim
125 words
A high frequency transformer comprising: (a) a magnetic circuit including at least two generally parallel cores connected by polar pieces; (b) at least one primary winding wound directly on one of said two parallel cores; (c) means for driving said primary winding; (d) a plurality of separate secondary windings magnetically coupled to said primary winding to generate output voltages and comprising flat conductors deposited on an insulating substrate, said insulating substrate carrying two of said secondary windings, each one of said two of said secondary windings being disposed respectively and generally perpendicularly to and around a respective one of said two parallel cores; (e) electrical circuit means coupled to said secondary windings for providing an output voltage in response to driving of said primary winding.
Claim 12
Dependent Claim
23 words
A transformer as in claim 9, wherein said electrical circuit means comprises adder means to add the output voltage of said secondary windings.
Claim 13
Dependent Claim
21 words
A transformer as in claim 10, wherein said adder means comprises means for serially connecting the outputs of said secondary windings.
Claim 14
Dependent Claim
37 words
A transformer as in claim 9, wherein said electrical circuit means comprises rectifier means for rectifying the output of said secondary windings and series connection means for putting the output voltage of said secondary windings in series.
Claim 15
Dependent Claim
40 words
A transformer as in claim 12, further comprising a resin block uniting the secondary windings and extending around the core with a cross-section corresponding to the dimensions of the parallel core of the magnetic circuit fitted with the primary winding.
Claim 16
Dependent Claim
40 words
A transformer as in claim 9, further comprising a resin block uniting the secondary windings and extending around the core with a cross-section corresponding to the dimensions of the parallel core of the magnetic circuit fitted with the primary winding.
Claim 17
Dependent Claim
26 words
A high frequency transformer as claimed in claim 1, wherein said at least one primary winding is wound directly on both of said two parallel cores.
Claim 18
Dependent Claim
25 words
A high frequency transformer as claimed in claim 1, wherein at least one primary winding is wound directly on each of said two parallel cores.
Claim 19
Dependent Claim
26 words
A high frequency transformer as claimed in claim 9, wherein said at least one primary winding is wound directly on both of said two parallel cores.
Claim 20
Dependent Claim
25 words
A high frequency transformer as claimed in claim 9, wherein at least one primary winding is wound directly one each of said two parallel cores.
Claim 21
Dependent Claim
123 words
A high frequency transformer comprising: (a) a magnetic circuit including at least two generally parallel cores connected by polar pieces; (b) at least one primary winding wound directly on said two parallel cores; (c) means for driving said primary winding; (d) a plurality of separate secondary windings magnetically coupled to said primary winding to generate output voltages and comprising flat conductors deposited on an insulating substrate, said insulating substrate carrying two of said secondary windings, each one of said two of said secondary windings being disposed respectively and generally perpendicularly to and around a respective one of said two parallel cores; (e) electrical circuit means coupled to said secondary windings for providing an output voltage in response to driving of said primary winding.
Claim 22
Dependent Claim
123 words
A high frequency transformer comprising: (a) a magnetic circuit including at least two generally parallel cores connected by polar pieces; (b) at least one primary winding wound directly on said two parallel cores; (c) means for driving said primary winding; (d) a plurality of separate secondary windings magnetically coupled to said primary winding to generate output voltages and comprising flat conductors deposited on an insulating substrate, said insulating substrate carrying two of said secondary windings, each one of said two of said secondary windings being disposed respectively and generally perpendicularly to and around a respective one of said two parallel cores; (e) electrical circuit means coupled to said secondary windings for providing an output voltage in response to driving of said primary winding.
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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) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |