STANDBY TYPE NO-BREAK POWER SOURCE

摘要

PURPOSE:To reduce the size of a power source and to save energy by utilizing an inverter for the removal of harmonic waves of a load current and for the charge of a storage battery during commercial power receiving to effectively use the inverter. CONSTITUTION:The harmonic wave components in a current of a load 17 are detected by a harmonic wave detector 23. A controller 22 of an inverter 15 is controlled by the detected harmonic wave component of the detector 23 during the receiving of commercial power. The inverter 15 is also used as a charger of a storage battery 14. Thus,the variations in the battery voltage and current of the battery 14 are detected by a battery variation detector 24, and the battery variation component and the detected component of the detector 13 are combined by a composite circuit 25. The combined output and the inverter variation component of an inverter variation detector 21 are switched by a switching circuit 26, and supplied to the controller 22. The circuit 26 is controlled by as a power interruption detector 19.