Optimal resetting of the transformer's core in single-ended forw

Details Optimal resetting of the transformer's core in single-ended forw Optimal resetting of the transformer's core in single-ended forw

1997-05-30

1999-02-16

Berhane, Adolf

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 56, H02M 3335

Patent

active

RE0360988

ABSTRACT:
The transformer's core in single ended forward converters is reset by a "magnetizing current mirror" consisting of a capacitor in series with an auxiliary switch which, during the OFF period of the primary switch, couples the capacitor to one of the transformer's windings to form a resonant circuit with the transformer's magnetizing inductance. The resonant circuit recycles the transformer's magnetizing energy by creating a mirror image of the magnetic flux between ON periods. This maximizes the flux swing available within a given core. The voltage stress on the primary switch is minimized as the voltage across the switch during the OFF period is approximately constant and automatically tailored to avoid dead time for arbitrary values of the switch duty cycle.

REFERENCES:
patent: 1672215 (1928-06-01), Heising
patent: 3490027 (1970-01-01), Galetto
patent: 3538353 (1970-11-01), Hanger
patent: 3621363 (1971-11-01), Ginnman et l.
patent: 3963973 (1976-06-01), Vermolen
patent: 4063306 (1977-12-01), Perkins et al.
patent: 4168477 (1979-09-01), Burchall
patent: 4178628 (1979-12-01), Shepard, Jr.
patent: 4186434 (1980-01-01), Cowett, Jr.
patent: 4300191 (1981-11-01), Baranowski et al.
patent: 4347474 (1982-08-01), Brooks et al.
patent: 4357654 (1982-11-01), Ikenoue et al.
patent: 4415959 (1983-11-01), Vinciarelli
patent: 4513360 (1985-04-01), Ikenoue et al.
patent: 4607323 (1986-08-01), Sokal et al.
patent: 4809148 (1989-02-01), Barn
patent: 4857822 (1989-08-01), Tabisz et al.
patent: 4928200 (1990-05-01), Redl et al.
patent: 4931716 (1990-06-01), Jovanovic et al.
patent: 4959764 (1990-09-01), Bassett
patent: 5111372 (1992-05-01), Kameyama
patent: 5126931 (1992-06-01), Jitaru
patent: 5282123 (1994-01-01), Boylan et al.
patent: 5291382 (1994-03-01), Cohen
patent: 5303138 (1994-04-01), Rozman
patent: 5331533 (1994-07-01), Smith
Schematic Diagram, 3000741, VDC, 40A DC--DC Converter Module, Jun. 29, 1982.
Schematic Diagram 24VDC, 3AMP Power Supply, 3000701, Dec. 13, 1978.
Schematic Diagram, 3000741, 5VDC, 40A Power Module, Feb. 18, 1980.
Schematic Diagram, BMPS PCB ASSY, L054-920-000, Mar. 1978.
Parts List, Drawing No. 13P902-XX, Chassis Ass'y BMPS, 4 sheets, earlier than Mar. 4, 1978.
Drawing No. 054S920, Specification Switching Regulator PCB Ass'y, 12 sheets, May 1, 1978.
Carsten, Memordanum, "BMPS Documentation"; Cessna Invoice Job No. 17395; copy of 1640 Series Expanded data Terminal, Sep. 12, 1979.
Parts List, Drawing No. 098P902-XX, Chassis/Housing Assembly, 4 sheets, May 26, 1978.
Bill of Material, Drawing No. P054-920-000, BMPS PCB Assembly, 4 sheets, Mar. 29, 1978.
Carsten Drawing, Sep. 25, 1977 revised.
Schematic Diagram, BMP PCB Assembly, L054-920-000, Mar. 1978.
Lambda Electronics GmbH v. Vicor Corporation, English Translation of Brief filed Dec. 2, 1997 on behalf of Vicor Corporation.
Letter from Vladimir Rybakov of ARS-Patent Agency of Patent Attorneys to David L. Feigenbaum dated Oct. 10, 1997.
Bassett, John A., "New Topology Constant Frequency ZVS Converter", Power Conversion, Jun. 1990, Proceedings, pp. 249-259, Jun. 1990.
Carsten, Bruce, "Fast, Accurate Measurement of Core Loss at High Frequencies", PCIM, pp. 29-32, Mar. 1986.
Carsten, Bruce, A Hybrid Series-Parallel Resonant Converter for High Frequencies and Power Levels, HFPC, pp. 41-47, Apr. 1987.
Carsten, Bruce, "Radio Frequency Power Conversion: Fad or the Future?", PCIM, pp. 34-36, Jan. 1986.
Carsten, Bruce, "Switchmode Design Techniques Above 500 KHz", High Frequency Power Conversion 1986 Tutorial Session 1, Virginia Beach, Virginia, pp. 1-14, 1986.
Dixon, Lloyd H., Jr., "Switching Power Supply Topology Review", Unitrode Power Supply Design Seminar, SEM-200, pp. 1-1-1-12 and 7-3-7-11, 1983.
Hoffman, David C., et al., "Designing a VMOS 250 Watt Off-Line Inverter", Proceedings of Powercon 5, San Francisco, California, pp. G1-1-G1-5, May 4-6, 1978.
Redl, Richard, "Insulated-Gate-Transistor Drivers for Soft-Switching Converters, Synchronous Rectifiers, and ZVS/ZCS Active Snubbers", IEEE, pp. 493-498, 1994.
Wustehube, "Switching Power Supplied", 1979, Expert Verlag.
Institut zur Entwicklung moderner Unterrichtsmedien e.V., "Basic Electronic Circuits", Winter 80/81, pp. 205-213.
H. Linse et al., "Elektrotechnik fur Maschinenbauer", Stuttgart 1979, pp. 36-39 and 62-67.
Vinciarelli, Patrizio, Statutory Declaration in the Matter of an Application Vicor Corporation to amend U.K. Pat. No. 0100356 and in the Matter of respective oppositions thereto by Computer Products Inc. and C&D Charter Power Systems, Inc. no date.
5-A SwitchMax Power Transistors, 2N6671, 2N6672, 2N6673, File Number 1090, Harris Semiconductor Biopolar Power Devices Data Book, Mar. 1989.
Levy, Aron, "Head off dc/dc-converter problems", Electronic Design, vol. 17, Aug. 16, 1976, pp. 72-78.
Marsh, Alphonso, H., "Gating scheme maximuzes dc-dc converter efficiency", Electronic Design, vol. 20, No. 13, dated Jun. 22, 1972, p. 100.
First Translation of Appln. No. JP54-165012, disclosure No. 56-88670, 18 pp. no date.
Second Translation of Appln. No. JP54-165012, disclosure No. 56-88670, 21 pp. (copy of Japanese 56-88670 attached) no date.
Maliniak, David, "Dense dc-dc Converters Actively Share Stress", Electronic Design, Jan. 21, 1993, pp. 39-44.
Andreycak, Bill, "1 MHz 150W Resonant Converter Design Review", A2-1-A2-22. no date.
Bedford, B.D., et al., Principles of Inverter Circuits, "Transistor-Switch Inverters", 1964, pp. 48-54.
Bose, Amar, Electro-Technology, "A Two-State Modulation System", Aug. 1964, pp. 42-47.
Bozotti, C., et al., Proceedings of Powercon, "Simplifying Converter Power Stage Design with Complementary Transistor Switches", Milan Italy, pp. J5-1-J5-6. no date.
Caldwell, John W., et al., Electronics, "Boosting Power", Nov. 21, 1958, pp. 86-88.
Camenzind, H.R., IEEE Transactions on Audio and Electroacoustics, "Modulated Pulse Audio Power Amplifiers for Integrated Circuits", vol. AU-14, Sep. 1966, pp. 136-140.
Carsten, Bruce W., Official Proceedings of the Fourteenth International PCI '87 Conference, "High Speed Control of Sinusoidal Input Current Converters for Minimal Energy Storage Requirements", Sep. 14-17 1987, CA.
Chick, R.F., et al., Westinghouse Silicon Power Transistor Handbook, First Edition 8-9394, pp. 5-6-5-8. no date.
Femling, Don, Instruments & Control Systems, "Solid State Inverter", Mar. 1969, pp. 133-135.
Gottlieb, Irving M., "Regulation Power Supplies", 1971, pp. 256-258.
Jansson, L.E., Mullard Technical Communications, "A survey of converter circuits for switched-mode power supplies", No. 119, Jul. 1973, pp. 271-278.
Joyce, James M., et al., PESC 77 Record, "Power Transistor Switching with a Controlled Regenerative Current Mode Transformer", Boca Raton, Florida, Jun. 14-16, 1977, pp. 148-155.
Koney, Yu I., Electronic Equipment in Automation, "Design of Switching Secondary Power Sources", Collection of Articles, Founded in 1969, Issue 9, 1977, pp. 1-5.
Mammano, B, Proceedings of Powercon 5, "Power Switch Drivers: New IC Interface Building Blocks for Switched-Mode Converters", San Francisco, CA, May 4-6, 1978, pp. F1-1 -F1-8.
Mammano, Bob, Proceedings of Powercon 5, "Simplifying Converter Design with a New Integrated Regulating Pulse Width Modulator", Beverly Hills, CA, Jun. 24-26, 1976, pp. E3-1 -E3-7.
Polikarpov, A.G., et al., Power Supplies, "DC Voltage Pulse Stabilizer with PWM Controller of Second Kind", 1982, pp. 40-44.
Pressman, Abaham I., "Switching and Linear Power Supply, Power Converter Design", `8.7 Recurrent Circuit Problems in Converter Designs`, Rochelle, NJ, pp. 259-263. no date.
Schwartz, Francisc C., PESC '78 Record IEEE Power Electronics, "A 95 Efficient Voltage Regulating 500 Watt Full Bridge Parallel Inverter-Converter Module with an Internal Frequency of 20 kHZ", NY, Jun. 13-15 1978, p. 331.
Spencer, John D., "Designing Switching Converters with an Improved Monolithic Control Circuit", Powercon 5 Paper, Dallas, TX, pp. I1-1 -I1-9. no date.
Spencer, John, A Texas Instruments Application Report, "Designing Switching Voltage Regulators with TL494", Dallas, TX Jul. 1978, pp. 2-10.
Electronic Design 17, "Head of

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