Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1987-09-17
1989-03-28
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363 41, 363 56, H02M 5458
Patent
active
048169811
ABSTRACT:
A supply for an AC (alternating current) output having a constant voltage and a constant frequency to a load such as computers. A constant voltage/frequency power supply apparatus is provided which includes at least a constant voltage/frequency output circuit including a converter, connected between an AC power source and the load, for DC-converting the AC output of this power source, and an inverter for AC-inverting the DC-converted output, a control circuit for controlling the inverter of the output circuit, and further a correction circuit for deleting as a DC magnetic polarization amount a DC component contained in the AC output of the output circuit, and for deleting a DC magnetic polarization amount from the AC output supplied to the load, based upon the detected DC magnetic polarization amount, whereby a sine wave AC output having a constant voltage/frequency which is not adversely influenced by the DC magnetic polarization is supplied to the load.
REFERENCES:
patent: 3697855 (1972-10-01), Kernick et al.
patent: 3859583 (1975-01-01), Reed
patent: 4133025 (1979-01-01), Wurzburg
patent: 4456950 (1984-06-01), Cordy
Hanaka Ikutaro
Kajita Takeyoshi
Nishihiro Akinori
Beha Jr. William H.
Mitsubishi Denki & Kabushiki Kaisha
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