Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1987-03-09
1988-12-27
Salce, Patrick R.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 17, 363 98, 363132, 378112, H02M 3335
Patent
active
047945060
ABSTRACT:
Disclosed is a resonant DC-DC converter which comprises an inverter for converting DC power into AC power, a rectifier connected to the AC output of the inverter through a resonant transformer for rectifying AC output power of the transformer to obtain DC power to be applied to a load, means for determining respective operation phases of a first, a second, a third and a fourth switching elements constituting the inverter in accordance with set signals indicating a voltage and a current to be supplied to the load, and a phase control circuit for controlling the respective operation phases of the first, second, third and fourth switching elements on the basis of an output signal of the phase determining means in a manner so that the first and second switching elements are alternately turned on with a phase difference of 180 degrees with respect to an operation frequency of the inverter, the third and fourth switching elements are alternately turned on with a phase difference of 180 degrees with respect to the operation frequency of the inverter, while varying a phase difference from turn-on of the first switching element to turn-on of the fourth switching element and a phase difference from turn-on of the second switching element to turn-on of the third switching element to thereby control or feed-back control the DC power to be supplied to the load.
REFERENCES:
patent: 4347562 (1982-08-01), Galloway
patent: 4504895 (1985-03-01), Steigerwald
patent: 4672528 (1987-06-01), Park et al.
Hatakeyama Takanobu
Hino Hirofumi
Hitachi Medical Corporation
Jones Judson H.
Salce Patrick R.
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