PURPOSE: To supply electric power from a low-voltage system with giving adverse effect to peripheral electrical equipment by providing a battery and its charger on a high-tension power section and on the inverter input side of a filament power section, in common with each other.
CONSTITUTION: A filament power section 31 is driven to preheat the filament of a X-ray tube 10, and the inverter 4 of a high-tension power section 21 is driven to apply d.c. high voltage between the A-K of the X-ray tube 10 for X-ray photographing. Usually, a current ID is smoothed by a capacitor 3 and supplied from a battery 23 to the inverter 4 during 0.1 second or shorter X-ray photographing. The output high-frequency voltage of the inverter 4 is boosted up by a step-up transformer 5 and rectified by a high-tension rectifier 6 to apply d.c. high voltage to the X-ray tube bulb 10. A battery 23 is charged by a charger 22.
KATO MASASHI
IGARASHI MASATERU
