UPS apparatus with control protocols

Details UPS apparatus with control protocols UPS apparatus with control protocols

1986-10-22

1987-11-24

Salce, Patrick R.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

307 66, H02M 545

Patent

active

047093188

ABSTRACT:
Power treatment apparatus of a UPS variety which includes a central node to which is coupled an a.c.-to-d.c. converter or conversion device, the a.c. side of which is connectable with line power and the d.c. side of which is coupled with the node. The node additionally is coupled to an output d.c.-to-a.c. converter or conversion device, the a.c. side of which is connectable with a load. Additionally, the node is coupled to a d.c.-to-d.c. converter which operates bidirectionally in conjunction with a rechargeable battery supply. The latter conversion device includes an inverter, the d.c. side of which is coupled to the battery and the a.c. side of which is coupled through a voltage boosting arrangement with a synchronous rectifier. A control protocol is developed for start-up procedures wherein the d.c./d.c. inverter is enabled only following a preliminary start-up evaluation procedure including power supply monitoring. Following this start-up, the output conversion device is enabled such that initial operation commences with battery power. Finally, the input converter is enabled to bring the node to its full operational voltage level.

REFERENCES:
patent: 3573483 (1971-04-01), White
patent: 4313060 (1982-01-01), Fickenscher et al.
patent: 4379325 (1983-04-01), Krampe et al.
patent: 4384214 (1983-05-01), Crick et al.
patent: 4506766 (1985-03-01), Watanabe
patent: 4642475 (1987-02-01), Fischer et al.

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