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:
Jun. 13, 2006
Filed:
Sep. 09, 2002
Yuushin Yamamoto, Tokyo, JP;
Yuushin Yamamoto, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for parallel non-redundancy operation of uninterruptible power supply apparatuses having a bypass circuit without using an additional common circuit. In the method of operating in parallel uninterruptible power supply apparatuses, each apparatus has two operational modes, a bypass feeding mode and an inverter feeding mode. An off-instruction for an AC switch that is turned on in the bypass feeding mode of one of the uninterruptible power supply apparatuses is produced in the respective uninterruptible power supply apparatuses when operated in the inverter feeding mode. The off-instruction is produced based on detection of coincidence of a bypass feeding signal which is active during the bypass feeding mode and a ready signal which becomes active when the inverter feeding mode is ready.