POWER CONVERSION DEVICE

This power conversion device includes: a reactor (2), switching elements (3a to 3d, 5a to 5d), a first capacitor (6), and a second capacitor (4) provided between an AC power supply (1) and a DC load (7); and a controller (8) for controlling operations of the switching elements (3a to 3d, 5a to 5d)....

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	TOYODA, Hajime
Format:	Patent
Sprache:	eng ; fre ; ger
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:	This power conversion device includes: a reactor (2), switching elements (3a to 3d, 5a to 5d), a first capacitor (6), and a second capacitor (4) provided between an AC power supply (1) and a DC load (7); and a controller (8) for controlling operations of the switching elements (3a to 3d, 5a to 5d). The controller (8) controls voltage of the first capacitor (6) and voltage of the second capacitor (4) to predetermined command values, while, in accordance with load information regarding the DC load (7), performing changeover between a first control method of controlling the switching elements (3a to 3d, 5a to 5d) at a constant switching frequency over an AC cycle of the AC power supply (1), and a second control method of controlling them at a frequency lower than the switching frequency in the first control method.