Device for driving a rotary-anode X-ray tube

摘要

The invention relates to a drive system for a rotary-anode X- ray tube which comprises an asynchronous motor. The current through the stator windings is generated by two pulse-width modulators to which sinusoidal signals which are phase-shifted 90 with respect to one another are supplied by a sine and a cosine memory. The amplitude thereof is controlled in dependence on the amplitude of the current through the relevant stator winding.