Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1985-10-21
1987-06-09
Salce, Patrick R.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363 54, 363129, 363137, 307 66, H02M 545
Patent
active
046725202
ABSTRACT:
A current-source power converting apparatus having a three phase AC-DC converter composed of self-extinction devices for converting an AC power furnished from an three phase AC power source into a DC power and a DC-AC inverter connected with the AC-DC converter through a DC reactor for re-converting the DC power into a three phase AC power to supply the re-converted power for a load. When the failure of the AC power source is detect according to one embodiment, the AC power source is detached from the AC-DC converter and a battery is connected between arbitrary two phases at the input end of the AC-DC converter. After that, the DC power of the battery is supplied for the DC-AC inverter intermittently by switching the corresponding self-extinction devices of the AC-DC converter and controlled by varying the duty ratio of the switching operation.
REFERENCES:
patent: 4246633 (1981-01-01), Borkovitz
patent: 4340823 (1982-07-01), Miyazawa
Hombu Mitsuyuki
Honda Kazuo
Shima Seiya
Suzuki Katsunori
Ueda Akiteru
Ault Anita M.
Hitachi , Ltd.
Salce Patrick R.
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