Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1990-06-08
1992-01-07
Stephan, Steven L.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 65, 363 95, H02M 328
Patent
active
050796860
ABSTRACT:
An enhancement-mode converter module, which converts power from an input source for delivery to a load in a series of quantized energy transfer cycles, includes a zero-current switching converter, an enhancement-mode controller, an an input-output port for carrying synchronizing information to and from an external synchronizing bus. The enhancement mode controller adjusts the frequency at which energy transfer cycles are triggered in the zero-current switching converter to be the greater of a first frequency, which will regulate the load voltage to a setpoint voltage, Vsp, characteristic of the enhancement-mode controller, or a second frequency, which is indicated by an input delivered to the input-output port. In an array of such enhancement mode converter modules, wherein the outputs of all of the enhancement-mode converter modules are connected together to deliver power to a load, and wherein synchronizing information carried to a synchronizing bus by the input-output port of any of the converter modules is delivered as an input to the input-output ports of the balance of the converter modules by propagation along the synchronizing bus, all of the converter modules will synchronize to an operating frequency determined by the enhancement-mode controller having the highest setpoint voltage, and each of the converter modules will deliver an essentially constant fraction of the total power delivered to the load by the array.
REFERENCES:
patent: 4415959 (1983-11-01), Vinciarelli
patent: 4425613 (1984-01-01), Shelly
patent: 4455545 (1984-06-01), Shelly
patent: 4648020 (1987-03-01), Vinciarelli
patent: 4675797 (1987-06-01), Vinciarelli
patent: 4695933 (1987-09-01), Nguyen et al.
patent: 4783728 (1988-11-01), Hoffman
patent: 4924170 (1990-05-01), Henze
patent: 4945462 (1990-07-01), Lieberman
patent: 4964028 (1990-10-01), Spataro
Vicor Product Catalog, Zero-Current Switching Conversion Products, 6/88.
Stephan Steven L.
Sterrett Jeffrey
VLT Corporation
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