Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1988-04-06
1989-09-05
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363132, H02M 5458, H02M 75387
Patent
active
048644838
ABSTRACT:
A high efficiency power converter is achieved utilizing a resonant DC link between a DC source, such as a converter rectifying power from an AC power system, to a variable frequency voltage source inverter. A resonant circuit composed of an inductor and capacitor is connected to the DC power supply and to a DC bus supplying the inverter and is caused to oscillate stably at a high frequency to provide a uni-directional voltage across the DC bus which reaches zero volts during each cycle of oscillation of the resonant circuit. The switching devices of the inverter are controlled to switch on and off only at times when the DC bus voltage is zero, thereby eliminating switching losses in the inverter. The resonant circuit can be caused to oscillate utilizing pairs of switching devices in the inverter or a separate switching device across the capacitor, which again are caused to switch on and off only at times of zero voltage on the DC bus. For AC to AC conversion, enabling bi-directional power flow, the switching devices of the power source which converts AC power to DC power may have switching devices which are also switched only at the times of zero voltage so that switching losses in these devices is also minimized. A clamp limits the maximum voltage applied to the switching devices, thereby reducing voltage stresses on the devices, and preferably returns energy to the resonant circuit during each cycle of oscillation.
REFERENCES:
patent: 3213287 (1965-10-01), King
patent: 3222587 (1965-12-01), Lichowsky
patent: 3247444 (1966-04-01), Clarke et al.
patent: 3430123 (1969-02-01), Corry et al.
patent: 3678367 (1972-07-01), McMurray
patent: 3699425 (1972-10-01), Hermansson et al.
patent: 3742336 (1973-06-01), Bedford
patent: 3858105 (1974-12-01), Gyugyl
patent: 3875494 (1975-04-01), Gyugyl
patent: 3940669 (1976-02-01), Tsuboi et al.
patent: 3953779 (1976-04-01), Schwartz
patent: 4005350 (1977-01-01), Brenneisen
patent: 4013937 (1977-03-01), Pelly et al.
patent: 4086621 (1978-04-01), Vukasovic
patent: 4086622 (1978-04-01), Vukasovic
patent: 4099225 (1978-07-01), Nygaard
patent: 4196468 (1980-04-01), Shapiro et al.
patent: 4196469 (1980-04-01), Gurwicz
patent: 4227243 (1980-10-01), Gurwicz et al.
patent: 4241395 (1980-12-01), Stacey et al.
patent: 4310866 (1982-01-01), Wirth
patent: 4333134 (1982-06-01), Gurwicz
patent: 4358654 (1982-11-01), Estes
patent: 4413311 (1983-11-01), Robinson
patent: 4429359 (1984-01-01), Anderson
patent: 4504895 (1985-03-01), Steigerwald
patent: 4523269 (1985-06-01), Baker et al.
patent: 4541041 (1985-09-01), Park et al.
patent: 4556937 (1985-12-01), Ziogas
patent: 4564895 (1986-01-01), Glennon
patent: 4635181 (1987-01-01), Bourgeault
patent: 4730242 (1988-03-01), Divan
Laszlo Gyugyi, et al., "The High-Frequency Base Converter--A New Approach to Static High-Power Conversion", IEEE Trans. on Industry Appl. vol. 1A-15, No. 4, Jul./Aug., 1979, pp. 420-429.
D. M. Divan, "The Resonant DC Link Converter--A New Concept in Static Power Conversion", 1986 IEEE Industry Applications Society Annual Meeting--Denver, Colo., Sep. 28 to Oct. 3, 1986, Conference Record, pp. 648-656.
D. M. Divan, "Power Converter Topologies for High Performance Motor Control Systems", 1987 CAMC Conference, Jun. 1987.
Francisc C. Schwartz, "A Doublesided Cycloconverter", IEEE Trans on Industrial Elect. and Control Instr., vol. IECI-28, No. 4, Nov. 1981, pp. 282-291.
Robert L. Steigerwald, "High Frequency Resonant Transistor DC/DC Converter", IEEE Trans. on Industrial Elect., vol. 1E-31, No. 2, May 1984, pp. 181-191.
D. M. Divan, "Design Considerations for Very High Frequency Resonant Mode DC/DC Converters", 1986 IEEE Industry Applications Society Annual Meeting, Denver, Colo., Sep. 28 to Oct. 3, 1986, Conference Record, pp. 640-647.
R. D. Lorenz and D. M. Divan, "Dynamic Analysis & Experimental Evaluation of Delta Modulators for Field Oriented AC Machine Current Regulators", 1987 IEEE Industrial Applications Society Annual Meeting, Atlanta, Ga., Oct. 18-23, 1987, Conference Record, pp. 196-201.
T. G. Habetler and D. M. Divan, "Rectifier/Inverter Reactive Component Minimization", 1987 IEEE Industrial Applications Society, Annual Meeting, Atlanta, Ga., Oct. 18-23, 1987, Conference Record, pp. 648-657.
D. M. Divan and G. Skibinski, "Zero Switching Loss Inverters for High Power Applications", 1987 IEEE Industrial Applications Society Annual Meeting, Atlanta, Ga., Oct. 18-23, 1987, Conference Record, pp. 627-634.
G. L. Skibinski and D. M. Divan "Characterization of Power Transistors Under Zero Voltage Switching", 1987 IEEE Industrial.
M. Kheraluwala and D. M. Divan, "Delta Modulation Strategies for Resonant Link Inverters", 18th Annual IEEE Power Electronics Specialists Conference, Virginia Polytechnic Institute, Blacksburg, Va., Jun. 21-26, 1987, Conference Record, pp. 271-278.
O. D. Patterson and D. M. Divan, "Pseudo-Resonant Full Bridge DC/DC Converter", 18th Annual IEEE Power Electronics Specialists Conference, Virginia Polytechnic Institute, Blacksburg, Va., Jun. 21-26, 1987, Conference Record, pp. 424-430.
Beha Jr. William H.
Wisconsin Alumni Research Foundation
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