Rotary-anode x-ray tube with grounded rotor

Details Rotary-anode x-ray tube with grounded rotor Rotary-anode x-ray tube with grounded rotor

H - Electricity

01

J

313/27

H01J 35/10 (2006.01)

Patent

CA 1043844

ABSTRACT: The invention relates to a rotary anode X-ray tube wherein the anode carries the high voltage during operation. In order to avoid flash-over between the rotor and the stator, a comparatively large air gap must be present between the two parts, thus only a small part of the energy supplied by the stator con- tributes to the acceleration of the rotor, resulting in a comparatively long acceleration time. The inven- tion enables substantially shorter acceleration times to be achieved in that an insulator is provided be- tween the rotor and the anode disc and in that the rotor is earthed. Only a minimum air gap is then re- quired between rotor and stator, because the breakdown strength is ensured by the insulating between anode and rotor. The anode is connected to the high voltage via a bearing. Moreover, the invention for the first time enables metal-ceramic rotary anode X-ray tubes to operate with a symmetrical high voltage.

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