SYSTEM INTERCONNECTION INVERTER

PROBLEM TO BE SOLVED: To prevent decrease in efficiency even when output current decreases, when alternating-current power is outputted, while detecting output current and performing feedback control. SOLUTION: An output current detecting section 38 is provided with a CT70B and a CT70A, that have a...

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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 CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION THEREOF CONTROLLING CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PHYSICS REGULATING SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent decrease in efficiency even when output current decreases, when alternating-current power is outputted, while detecting output current and performing feedback control. SOLUTION: An output current detecting section 38 is provided with a CT70B and a CT70A, that have a higher current transformation ratio than CT70B. A signal-generating section 50 is provided with a selecting section 66 that selects the CT70B, when input power to the inverter is high; reads the output from the CT70B as the output current of the inverter; and performs feedback control. When the input current to the inverter becomes low, by having the selecting section select the CT70A and reads the output from the CT70A as the output current, desired feedback gain is secured and decrease in the conversion efficiency, even when the output current decreases, is prevented. COPYRIGHT: (C)2011,JPO&INPIT