Abstract:
Die Erfindung gibt eine Drehanodenanordnung mit einer Drehanode (104), einem Rotor (143) zum Antrieb der Drehanode (104) und einem Stator (105), der ein Drehmoment auf den Rotor (143) ausübt, an. Der Stator (105) umfasst mindestens eine Spule (151) zur Erzeugung eines ersten Magnetfelds und mindestens einen Permanentmagneten (152) zur Erzeugung eines zweiten Magnetfelds. Die Erfindung gibt auch eine Röntgenröhre mit der erfindungsgemäßen Drehanodenanordnung an. Die Erfindung bietet den Vorteil, dass bei einem durch Permanentmagnete erregten Synchronmotor eine hohe elektromagnetische Ausnutzung möglich ist.
Abstract:
The present invention relates to a rotor for an X-ray tube. In order to provide further possibilities for weight reduction in X-ray tubes for providing an increase of rotation frequency, a rotor (10) for an X-ray tube is provided, comprising a rotational structure (12) with a plurality of electrically conducting elements (14), the ends thereof connected to each other and provided such that an external stator magnetic field generated by a stator induces a current in the electrically conducting elements, which current generates a rotor magnetic field to interact with the stator magnetic field. At least the plurality of electrically conducting elements is made from carbon composite based material.
Abstract:
The present invention relates to an X-ray tube with an active balancing arrangement. In order to provide improved balancing for a minimized imbalance during operation, an X-ray tube (10) with an active balancing arrangement (12) is provided, comprising a rotating anode arrangement (14), a bearing arrangement (20, 22, 24), a driving arrangement (26, 28, 30) for rotating the anode arrangement, an imbalance detection arrangement (32), and active balancing means (34, 36, 38, 40, 42). The bearing arrangement is provided as a fixed bearing of the rotating anode arrangement for supporting the rotating anode arrangement. The imbalance detection arrangement is configured to detect an imbalance of the anode. The active balancing means are electro-magnetic balancing means configured to provide a magnetic field and to apply magnetic eccentricity forces to the rotating arrangement.
Abstract:
The invention relates to a bearing arrangement for a touch-free magnetic axial bearing (1), comprising a rotor/stator pair (2, 3) which can be rotated relative to each other on a common rotational axis (6), wherein magnets are provided both on the rotor side and on the stator side, which create a magnetic field bearing acting towards the axial direction, and a definite gap is present between the rotor (2) and stator (3), so that the rotor (2) and stator (3) do not touch each other, wherein on the side of the rotor (2) and on the side of the stator (3) permanent magnets (4) which are opposite to each other are arranged, the stator-side polarity is directed contrary to the rotor-side polarity, and on the side of the stator (3) at least one control and/or adjustable electromagnet having a coil (5) is arranged, which is opposite to a metal surface on the side of the rotor (2), which serves as a magnet yolk. Further, the invention relates to an X-ray tube (8) having a vacuum housing (9) and a rotary anode localized in the vacuum housing (9), which has at least one magnetic axial bearing (1) of the above-mentioned embodiment for the rotary anode.