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:
Dec. 10, 2002
Filed:
Jan. 25, 2002
Richmond Andrew Real, Gilbert, AZ (US);
Acme Electric Corporation, East Aurora, NY (US);
Abstract
A redundant power system includes plural load-sharing power supplies connected to a common AC output bus. Identical circuitry is provided in each supply to control the redundant operation and is connected to each of the others via a common redundancy bus. An arbitration circuit in each supply selects a master power supply based on which supply detects the lack of a master supply first via the redundancy bus. A synchronization circuit in each slave supply synchronizes the polarity of the respective AC output with that of the master supply via the redundancy bus. A redundant bias circuit in each supply provides operating power to the redundancy circuitry in the respective supply from a common bulk voltage provided on the redundancy bus. A soft-start circuit in each supply allows all the supplies to start producing power at the AC output bus in unison. An overvoltage correction circuit in each supply detects an overvoltage on the AC output bus and shuts down only the supply which is causing the overvoltage.