UNINTERRUPTIBLE POWER SUPPLY WITH POWER STORAGE FUNCTION AND ITS CONTROLLING METHOD AND CONTROLLER

• Main Authors: MANABE YUICHI, FUKUDA SHIGEHIKO, KANEDA MINORU, WATABE MASASHI, TERADA YUICHI
• Format: Patent
• Language: English
• Published: 12.05.2005
• Edition: 7
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

PROBLEM TO BE SOLVED: To solve a problem of an uninterruptible power supply employing a secondary battery for storing power that a switch circuit must be connected in series with the secondary battery in order to protect it against overcharge because charge/discharge control is performed based on a time schedule. SOLUTION: The switch circuit can be eliminated by controlling the passing power of a converter to match the load power of an inverter or to deviate slightly therefrom and generating a PCS charge/discharge command such that a secondary battery is brought into zero current state or faint discharge state thereby preventing overcharge. COPYRIGHT: (C)2005,JPO&NCIPI