X-Ray diagnostic generator comprising an inverter circuit feeding the high voltage transformer

Claim 1

An x-ray diagnostic generator comprising a d.c. voltage source having a power rectifier, an inverter circuit fed by said d.c. voltage source, a high voltage transformer connected with said inverter and having an output, an x-ray tube connected to the output of the high voltage transformer, a rotary anode drive circuit including a rotary anode motor designed as an induction motor, in which the rotary anode motor is likewise fed by the inverter circuit, characterized in that the inverter circuit (3) comprises a full bridge arrangement with two pairs of alternately closable electronic switches (5 through 8), having a first diagonal including said high voltage transformer, and having a second diagonal connected with said d.c. voltage source (1, 2), a switch (20), said full bridge arrangement including first and second current flow paths each including one of said electronic switches and an intervening connection point, and means for connecting the rotary anode motor (16) via said switch (20) to said connection point of said first and second current flow paths to supply alternating current to said rotary anode motor while said first diagonal is deenergized, and means for energizing said first diagonal with alternating current to energize said high voltage transformer.