Drive for rotary anodes of X-ray tubes

Details Drive for rotary anodes of X-ray tubes Drive for rotary anodes of X-ray tubes

1981-05-20

1984-01-17

Church, Craig E.

X-ray or gamma ray systems or devices

Electronic circuit

For electrode movement

378118, H05G 170

Patent

active

044267207

ABSTRACT:
In an exemplary embodiment, to reduce wear on the bearings of a rotary anode during radiography processes which require a high load of the tube, such as e.g. all types of series techniques, a control of the rotational frequency of the anode is effected according to which the rotational speed of the anode drive motor is increased as a function of increasing thermal load on the anode plate. For this purpose there takes place, in a static frequency changer, an increase of the frequency of the alternating current with which the motor is driven. The motor drive frequency can, for example, be controlled in dependence upon the temperature of the anode plate as sensed by a measuring probe. An inventive drive of rotary anodes is particularly suited for use in the case of X-ray examination apparatus, especially computer tomographs.

REFERENCES:
patent: 3062960 (1962-11-01), Laser
patent: 3205360 (1965-09-01), Graves
patent: 4225787 (1980-09-01), Shapiro

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