SYSTEM LINKED INVERTER

SYSTEM LINKED INVERTER

PROBLEM TO BE SOLVED: To prevent reduction in efficiency, even when output current becomes small when outputting AC power, while performing feedback control of output current by detecting the current. SOLUTION: A CT 70B and a CT 70A having a current transformation ratio higher than that of the CT 70...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: ONIZUKA KEIGO
Format: Patent
Sprache:eng
Schlagworte:
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
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To prevent reduction in efficiency, even when output current becomes small when outputting AC power, while performing feedback control of output current by detecting the current. SOLUTION: A CT 70B and a CT 70A having a current transformation ratio higher than that of the CT 70B are provided in an output current detecting section 38. A selecting section 66 is provided in a signal generating section 50. The selecting section selects the CT 70B when input power to an inverter is high and performs feedback control by reading output of the CT 70B in terms of output current of the inverter. The selecting section selects the CT 70A, when input to the inverter becomes low and secures a desired feedback gain by reading output of the CT 70A in terms of output current of the inverter, thereby reduction in conversion efficiency is prevented, even if the output current is lowered. COPYRIGHT: (C)2010,JPO&INPIT