US5479331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Small form factor power supply
Assignee: Comarco Wireless Systems LLC
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Filing: 1994-04-26
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Granted: 1995-12-26
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Expires: 2014-04-26
Abstract
Abstract A new, small form factor power supply is disclosed that provides a regulated DC power supply in a package that radiates relatively little heat and that occupies 2.75" by 4.5" by 0.75". The secondary coil of the transformer is positioned at the summing node of the flux of the primary coils and the phase of the drive signals provided to the secondary coils is regulated to control the current and voltage provided by the secondary circuit. Preferably, all circuit components are surface mount devices and the transformer cores are E block planar cores mounted on the printed circuit board.
Inventors
- 👤 Thomas W. Lenni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:54
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/66; H01R13/665; H01R13/6675; H02; H02J; H02J7/00; H02J7/02; H02J7/40; H02J7/443; H02J7/445; H02J7/485; H02J7/865; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/338; H02M3/3382; H05; H05K; H05K1/00; H05K1/16; H05K1/165; H01R13/02; H01R13/22; H01R13/24; H01R2201/00; H01R2201/16; H01R2201/24; H02J2207/00; H02J2207/20; H02M3/003; H05K2201/00; H05K2201/08; H05K2201/083; H05K2201/086; H05K2201/09; H05K2201/09009; H05K2201/09063
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
147 words
A power supply circuit, the circuit comprising: a magnetic core; first and second primary coals electromagnetically coupled to the core to induce magnetic flux in the core; and a secondary coil electromagnetically coupled to the core to generate an electromotive force based upon the magnetic flux in the core, wherein the secondary coil is positioned relative to the primary coils such that the flux generated by the primary coils constructively interfere; driving circuitry coupled to each of the primary coils to provide a separate driving signal to each primary coil and each driving signal having a phase a phase relationship existing between the driving signals; a rectifier coupled to the secondary coil to provide a regulated DC signal and a feedback means coupled between the output of the rectifier and the driving circuitry to alter the phase relationship between the driving signals to regulate the DC signal.
Claim 2
Dependent Claim
147 words
A power supply circuit, the circuit comprising: a magnetic core; first and second primary coals electromagnetically coupled to the core to induce magnetic flux in the core; and a secondary coil electromagnetically coupled to the core to generate an electromotive force based upon the magnetic flux in the core, wherein the secondary coil is positioned relative to the primary coils such that the flux generated by the primary coils constructively interfere; driving circuitry coupled to each of the primary coils to provide a separate driving signal to each primary coil and each driving signal having a phase a phase relationship existing between the driving signals; a rectifier coupled to the secondary coil to provide a regulated DC signal and a feedback means coupled between the output of the rectifier and the driving circuitry to alter the phase relationship between the driving signals to regulate the DC signal.
Claim 3
Dependent Claim
66 words
The power supply circuit of claim 1, wherein the feedback means includes: a current sensing circuit coupled to the secondary coil to sense current flow through the secondary coil; a voltage sensing circuit coupled to the regulated DC signal; an amplitude modulation circuit to amplitude modulate a signal based upon the sensed voltage and current flow; and a feedback transformer coupled to the amplitude modulation circuit.
Claim 4
Dependent Claim
38 words
The power supply circuit of claim 1, wherein the core is an E block type and each primary coil is mounted on an outer leg of the core and the secondary coil is mounted on an inner leg.
Claim 5
Dependent Claim
41 words
The power supply circuit of claim 2, wherein the core is an E block type and each primary coil is mounted on an outer leg of the core and the secondary coil is mounted on an inner leg of the core.
Claim 6
Dependent Claim
16 words
The power supply circuit of claim 1, wherein the core is a low profile magnetic core.
Claim 7
Independent Claim
174 words
A method for providing a regulated power supply providing a regulated direct current output signal having at least one parameter at a predefined level, the method comprising: providing a first and second driving signal each having a phase, a controllable phase relationship existing between the signals; providing a first magnetic core with a plurality of primary coils magnetically coupled to the core to produce magnetic flux therein and at least a secondary coil magnetically coupled to the core such that the secondary coil is positioned at a point where the magnetic flux from the two primary coils constructively interfere so that the secondary coil has a current induced therein when the primary coils are driven; providing the direct current output signal based upon the current induced in the secondary coil, sensing at least one parameter of the output signal; providing a feedback signal based upon the sensed parameter; and altering the controllable phase relationship exists between the driving signals to keep the parameter of the output signal within a predetermine range of the level.
Claim 8
Independent Claim
174 words
A method for providing a regulated power supply providing a regulated direct current output signal having at least one parameter at a predefined level, the method comprising: providing a first and second driving signal each having a phase, a controllable phase relationship existing between the signals; providing a first magnetic core with a plurality of primary coils magnetically coupled to the core to produce magnetic flux therein and at least a secondary coil magnetically coupled to the core such that the secondary coil is positioned at a point where the magnetic flux from the two primary coils constructively interfere so that the secondary coil has a current induced therein when the primary coils are driven; providing the direct current output signal based upon the current induced in the secondary coil, sensing at least one parameter of the output signal; providing a feedback signal based upon the sensed parameter; and altering the controllable phase relationship exists between the driving signals to keep the parameter of the output signal within a predetermine range of the level.
Claim 9
Dependent Claim
10 words
The method of claim 6, wherein the parameter is current.
Claim 10
Dependent Claim
10 words
The method of claim 6, wherein the parameter is voltage.
Claim 11
Dependent Claim
16 words
The method of claim 6, wherein each primary coil is part of a separate resonant circuit.
Claim 12
Dependent Claim
22 words
The method of claim 9, wherein the frequencies of the drive signals are substantially at the resonant frequency of the resonant circuit.
Claim 13
Dependent Claim
36 words
The method of claim 6, wherein the providing of the feedback signal comprises: inducing a feedback current based upon the magnetic flux induced in the core; and amplitude modulating the feedback current based upon the parameter.
Claim 14
Dependent Claim
147 words
A power supply circuit, the circuit comprising: a magnetic core; first and second primary coils electromagnetically coupled to the core to induce magnetic flux in the core; and a secondary coil electromagnetically coupled to the core to generate an electromotive force based upon the magnetic flux in the core, wherein the secondary coil is positioned relative to the primary coils such that the flux generated by the primary coils destructively interfere: driving circuitry coupled to each of the primary coils to provide a separate driving signal to each primary coil and each driving signal having a phase, a phase relationship existing between the driving signals; a rectifier coupled to the secondary coil to provide a regulated DC signal; and a feedback means coupled between the output of the rectifier and the driving circuitry to alter the phase relationship between the driving signals to regulate the DC signal.
Claim 15
Dependent Claim
147 words
A power supply circuit, the circuit comprising: a magnetic core; first and second primary coils electromagnetically coupled to the core to induce magnetic flux in the core; and a secondary coil electromagnetically coupled to the core to generate an electromotive force based upon the magnetic flux in the core, wherein the secondary coil is positioned relative to the primary coils such that the flux generated by the primary coils destructively interfere: driving circuitry coupled to each of the primary coils to provide a separate driving signal to each primary coil and each driving signal having a phase, a phase relationship existing between the driving signals; a rectifier coupled to the secondary coil to provide a regulated DC signal; and a feedback means coupled between the output of the rectifier and the driving circuitry to alter the phase relationship between the driving signals to regulate the DC signal.
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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) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |