The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 1987
Filed:
Oct. 22, 1986
Don A Gephart, Delaware, OH (US);
Jeffrey M Powell, Galena, OH (US);
Liebert Corporation, Columbus, OH (US);
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.