PROBLEM TO BE SOLVED: To provide an X-ray high voltage generator for preventing the generation of an excessive inrush current in the condenser connected to the inlet stage of an inverter, when the power source supplied to an X-ray generation part is changed over on the basis of a photographic condition, and to provide a moving type X-ray fluoroscopic photographic apparatus using the same.SOLUTION: An X-ray high voltage generator has: a high voltage conversion part for supplying power to an X-ray source generating X-rays the condenser installed on the input stage of the high voltage conversion part a fluoroscopic power source supply part for supplying power to the high voltage conversion part using the power from a battery at the time of fluoroscopy a photographing power source supply part having a battery and supplying power to the high voltage conversion part using the power from the battery at the time of photographing and a power source changeover part for connecting either one of the fluoroscopic power source supply part and the photographing power source supply part to the high voltage conversion part. The power source changeover part performs the connection of the high voltage conversion part and the photographing power source supply part when the voltage value calculated by subtracting the voltage value of the condenser from the voltage value of the battery is within a preset differential voltage threshold value.COPYRIGHT: (C)2014,JPO&INPIT【課題】撮影条件に基づいてX線発生部に供給する電源を切替える際、インバータの入力段に接続したコンデンサに対し過剰な突入電流の発生を防止するX線高電圧発生装置、及び、それを用いた移動型X線透視撮影装置を提供する。【解決手段】X線を発生するX線源に電力を供給する高電圧変換部と、高電圧変換部の入力段に設置したコンデンサと、透視の際、商用交流電源を用いて高電圧変換部に電力を供給する透視用電源供給部と、バッテリを有し、撮影の際、バッテリからの電力を用いて高電圧変換部に電力を供給する撮影用電源供給部と、高電圧変換部に対し、透視用電源供給部、又は撮影用電源供給部の何れか一方を接続させる電源切替え部と、を有するX線高電圧発生装置であって、電源切替え部は、高電圧変換部と撮影用電源供給部との接続を、バッテリの電圧値からコンデンサの電圧値を差し引いた電圧値が、予め設定した差分電圧閾値以内にある場合に行う。【選択図】図2
