Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1985-11-14
1987-11-10
Salce, Patrick R.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 56, 363 98, 363132, H02M 3335, H02H 7122
Patent
active
047061774
ABSTRACT:
A DC-AC inverter includes a bridge converter for converting an input DC into an output AC signal which uses field-effect transistors in the bridge circuit. The characteristics of the field-effect transistors enable the bridge converter to temporarily supply power in significant overload conditions. A DC-DC converter may also be included between the DC power source and the bridge converter to provide voltage boosting, when required. Field-effect transistors are also included in the DC-DC converter for power switching. The duration and amount of overload current output by the bridge converter is monitored and when an overcurrent condition beyond a predetermined amount or duration is detected, the bridge converter is disabled. The bridge converter is reenabled at a predetermined time thereafter.
A plurality of field effect transistors may be connected in parallel at each location wherein a solid state power switching device is used in the inverter to thereby multiply the power handling capacity of the inverter as a whole.
REFERENCES:
patent: 3970916 (1976-07-01), Kienscherf
patent: 4225912 (1980-09-01), Messer
patent: 4389702 (1983-06-01), Clemente et al.
patent: 4410935 (1983-10-01), Dang
patent: 4578744 (1986-03-01), Antula
IBM Technical Disclosure Bulletin, vol. 26, No. 5, Oct. 1983, pp. 2246-2248.
Jones Judson H.
Salce Patrick R.
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