US4964028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current limited quasi-resonant voltage converting power supply
Assignee: BAE Systems Aerospace Inc
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Filing: 1989-10-26
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Granted: 1990-10-16
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Expires: 2009-10-26
Abstract
Abstract A voltage converting power supply having current limiting characteristics wherein a flyback converter is operated in a load dependent half-wave mode. Constant pulse width switching at a variable rate is utilized for regulation and, by setting the maximum switching frequency, current limiting is achieved.
Inventors
- 👤 Vincent J. Spataro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:26
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33507; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
175 words
A voltage converting power supply having current limiting characteristics comprising: input means for receiving electrical power at an input voltage; output means including a flyback converter for providing electrical power at an output voltage; controllable switch means for providing a current path to effect the transfer of power from said input means to said output means, wherein said switch means is controllable to provide said current path at a variable frequency and the amount of power being transferred is dependent on the frequency at which said current path is provided; and control means for controlling said switch means including: means for providing a reference voltage; means for comparing said output voltage with said reference voltage and providing a comparison signal representative of the difference therebetween; means utilizing said comparison signal for controlling the frequency at which said current path is provided to maintain said output voltage equal to said reference voltage; means for operating said switch means in a half-wave mode; and means for limiting the maximum frequency at which said current path is provided.
Claim 2
Dependent Claim
175 words
A voltage converting power supply having current limiting characteristics comprising: input means for receiving electrical power at an input voltage; output means including a flyback converter for providing electrical power at an output voltage; controllable switch means for providing a current path to effect the transfer of power from said input means to said output means, wherein said switch means is controllable to provide said current path at a variable frequency and the amount of power being transferred is dependent on the frequency at which said current path is provided; and control means for controlling said switch means including: means for providing a reference voltage; means for comparing said output voltage with said reference voltage and providing a comparison signal representative of the difference therebetween; means utilizing said comparison signal for controlling the frequency at which said current path is provided to maintain said output voltage equal to said reference voltage; means for operating said switch means in a half-wave mode; and means for limiting the maximum frequency at which said current path is provided.
Claim 3
Dependent Claim
35 words
A power supply according to claim 1 wherein said control means effects the provision of said current path at a variable rate and wherein each provision of said current path is for a fixed time.
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) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |