ROTARY ANODE X-RAY TUBE DEVICE

PURPOSE:To prevent a short-circuit failure of a stator coil due to an abnormal voltage by connecting a surge absorbing element between lead wires of the stator. CONSTITUTION:Before X-rays are exposed when an X-ray picture is photographed, an energizing power is fed to a stator 2 from a stator energizing power supply 3, thereby an anode 5 is rotated at a predetermined speed. Next, a high voltage is applied across the cathod 6 and anode 5 of a rotary anode X-ray tube 1 from an X-ray tube boltage energizing power supply 4, and X-rays with the preset X-ray tube voltage and X-ray tube current are exposed. At this time, when a discharge occurs in the X-ray tube or a circuit system, an abnormal voltage of tens KV occurs across coil wires of the stator 2, but if the operating voltage of a surge absorbing element 7 is made sufficiently lower than the withstand voltage value of the stator coil, the stator coil can be prevented from being applied with an abnormal voltage. 8 is an X-ray tube device.