US4663699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous converter circuit
Assignee: Pioneer Magnetics Inc
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Filing: 1985-04-12
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Granted: 1987-05-05
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Expires: 2005-04-12
Abstract
Abstract A high power factor, regulated synchronous converter for converting 110-volt, rectified, 50-60 Hz alternating current into a direct current output, which has enhanced hold up (energy storage). The circuit includes a half-bridge inverter for converting the half-wave rectified voltage into high frequency alternating current in the range of 20-30 KHz. The high frequency alternating current is coupled through an inductance coil to a half-bridge synchronous regulator/rectifier which produces a direct current output. The energy delivered to the half-bridge synchronous regulator/rectifier is stored in a capacitor, and the voltage across the capacitor may be regulated making energy storage independent of the line voltage. Additional synchronous regulator/rectifiers may be coupled to the circuit to produce additional direct current outputs.
Inventors
- 👤 Bruce L. Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:22
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33569; H02M3/33576; H02M3/33592; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
283 words
A synchronous converter circuit including: an input circuit adapted to be connected to the alternating current mains for rectifying the low frequency alternating current therefrom; an inverter circuit coupled to the input circuit to invert the rectified voltage therefrom into a high frequency current; said inverter circuit including first and second switches alternately operated at a rate corresponding to the frequency of the high frequency current; and a synchronous regulator circuit coupled to the inverter circuit and including first and second switches operated in synchronism with the first and second switches of the inverter circuit but at a varying phase relationship therewith to cause the regulator to generate a constant amplitude squarewave signal having a frequency corresponding to the frequency of the high frequency current from the inverter, said first and second switches of said synchronous converter circuit being series connected across the input circuit, and said synchronous converter circuit including first and second capacitors series connected across said switches having a capacity too small to filter out the ripple resulting from the half-wave rectification of the line voltage by said input circuit but providing a low impedance path for the high frequency currents from said synchronous converter circuit; and said synchronous regulator including first and second capacitors series connected across said first and second switches of said synchronous regulator circuit and whose common junction is connected to the common junction of the first and second capacitors of the synchronous inverter, and which includes a storage capacitor connected across the first and second capacitors of said synchronous regulator across which a constant amplitude high frequency voltage occurs having a frequency corresponding to the frequency of the high frequency current from the synchronous inverter.
Claim 2
Dependent Claim
283 words
A synchronous converter circuit including: an input circuit adapted to be connected to the alternating current mains for rectifying the low frequency alternating current therefrom; an inverter circuit coupled to the input circuit to invert the rectified voltage therefrom into a high frequency current; said inverter circuit including first and second switches alternately operated at a rate corresponding to the frequency of the high frequency current; and a synchronous regulator circuit coupled to the inverter circuit and including first and second switches operated in synchronism with the first and second switches of the inverter circuit but at a varying phase relationship therewith to cause the regulator to generate a constant amplitude squarewave signal having a frequency corresponding to the frequency of the high frequency current from the inverter, said first and second switches of said synchronous converter circuit being series connected across the input circuit, and said synchronous converter circuit including first and second capacitors series connected across said switches having a capacity too small to filter out the ripple resulting from the half-wave rectification of the line voltage by said input circuit but providing a low impedance path for the high frequency currents from said synchronous converter circuit; and said synchronous regulator including first and second capacitors series connected across said first and second switches of said synchronous regulator circuit and whose common junction is connected to the common junction of the first and second capacitors of the synchronous inverter, and which includes a storage capacitor connected across the first and second capacitors of said synchronous regulator across which a constant amplitude high frequency voltage occurs having a frequency corresponding to the frequency of the high frequency current from the synchronous inverter.
Claim 3
Dependent Claim
24 words
The synchronous converter circuit defined in claim 1, in which said synchronous regulator includes a storage capacitor across which the constant amplitude voltage appears.
Claim 4
Dependent Claim
39 words
The synchronous converter circuit defined in claim 1, and which includes a synchronous rectifier circuit coupled to the synchronous regulator circuit and forming a regulated direct current output in response to the constant amplitude squarewave from the regulator circuit.
Claim 5
Dependent Claim
54 words
The synchronous converter circuit defined in claim 3, in which said synchronous rectifier includes first and second switches operated in synchronism with the first and second switches of the synchronous inverter circuit but at a varying phase relationship with respect thereto to regulate the direct current voltage appearing at the output of the rectifier.
Claim 6
Dependent Claim
21 words
The synchronous converter circuit defined in claim 3, in which said synchronous rectifier includes a transformer having a high leakage reactance.
Claim 7
Dependent Claim
23 words
The synchronous converter circuit defined in claim 1, in which said synchronous inverter is coupled to said synchronous regulator through an inductance coil.
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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |