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:
Aug. 15, 2000
Filed:
Jul. 30, 1999
Kiichiro Tsuji, Minoo, JP;
Toshifumi Ise, Suita, JP;
Osaka University, Osaka, JP;
Abstract
A multi-quality electric power supply apparatus supplies electric power based on the demand of various loads. The multi-quality electric power supply apparatus includes an inverter having a three-phase bridge configuration with an A/C output terminal connected to a distribution line of each phase of the three-phase four-wire A/C system. A capacitor is connected among two input terminals of the D/C side of the inverter and a neutral line of the three-phase four-wire A/C system. An uninterruptable power supply device is inserted from a node point to the distribution line of the inverter in a given distribution line of one phase on the load side to compensate for a voltage drop of the distribution line and to supply a given voltage in the distribution line during an interrupted power supply. A voltage drop compensation device is inserted from a node point to the distribution line of the inverter in another given distribution line of one phase on the load side, in order to compensate for the voltage drop of the distribution line, where each phase of the inverter is independently controlled and the electric power is supplied to the single phase load connected between the neutral line and each phase of the distribution line, respectively.