US4262328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
DC-to-DC converter
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1979-08-03
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Granted: 1981-04-14
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Expires: 1999-08-03
Abstract
Abstract A DC-to-DC Converter using four tightly coupled transformer windings, two energy transfer capacitors, and a pair of switching devices connected to remove the ripple from both the input and output current circuits. The switching devices are driven in response to a switching signal.
Inventors
- 👤 Gordon E. Bloom
- 👤 Altan Eris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:27
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
130 words
A DC-to-DC converter having a first input terminal pair for receiving a DC source and a second output terminal pair for connecting a load thereto, inductively coupled and capacitively coupled together, first switching apparatus connected in a closed mode to deliver input current from said input terminal pair through a first inductor, second switching apparatus connected in a closed mode to deliver output current through a second inductor to said output terminal pair, apparatus for cycling said switching apparatus so that one is open when the other is closed, the improvement comprising: said capacitive coupling comprising a pair of capacitors in series connection; and further comprising at least third and fourth inductors connected in parallel to the junction between said capacitors and inductively coupled to said first and second inductors.
Claim 2
Dependent Claim
130 words
A DC-to-DC converter having a first input terminal pair for receiving a DC source and a second output terminal pair for connecting a load thereto, inductively coupled and capacitively coupled together, first switching apparatus connected in a closed mode to deliver input current from said input terminal pair through a first inductor, second switching apparatus connected in a closed mode to deliver output current through a second inductor to said output terminal pair, apparatus for cycling said switching apparatus so that one is open when the other is closed, the improvement comprising: said capacitive coupling comprising a pair of capacitors in series connection; and further comprising at least third and fourth inductors connected in parallel to the junction between said capacitors and inductively coupled to said first and second inductors.
Claim 3
Dependent Claim
104 words
Apparatus as recited in claim 1 in which one terminal of each of said input and output terminal pairs are connected together at a common terminal; and said first switching means comprising a transistor with its collector-emitter path connected between the junction of said first capacitor and said first inductor, and said common terminal; said apparatus for cycling being connected between the base of said transistor and said common terminal; said second switching apparatus comprising a diode connected between the junction of said second capacitor and said second inductor and said common terminal; said third and fourth inductors being connected to said common terminal.
Claim 4
Dependent Claim
35 words
Apparatus as recited in claim 1 and further characterized by fifth and sixth inductors substantially uncoupled from said first, second, third and fourth inductors, and connected in series with said third and fourth inductors, respectively.
Claim 5
Dependent Claim
25 words
Apparatus as recited in claims 1, 2, or 3 in which said first, second, third and fourth inductors are windings upon a common ferromagnetic core.
Claim 6
Dependent Claim
23 words
Apparatus as recited in claim 4 in which the material of said common core is selected to prevent saturation thereof by DC biases.
Claim 7
Dependent Claim
14 words
Apparatus as recited in claim 4 in which said core is a ferrite core.
Claim 8
Dependent Claim
9 words
Apparatus as recited in claim 3 in which ##EQU2##
Claim 9
Dependent Claim
36 words
Apparatus as recited in claim 3 in which said first, second, third and fourth inductors are windings upon a common ferromagnetic core of material which is selected to prevent saturation thereof by DC biases; and ##EQU3##
Claim 10
Dependent Claim
14 words
Apparatus as recited in claim 8 in which said core is a ferrite core.
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) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |