Middle frequency X=ray generator - has diode, resistor and capacitor between DC=DC converter output and DC=AC converter input to reduce ripple

摘要

The x-ray generator has a given circuit between the dc/dc voltage converter (3) and the dc/ac converter (5) whose bridge diagonal contains the primary winding of an hv transformer. (The dc/dc converter supplies the dc/ac converter). The given circuit consists of a diode (18) and the parallel combination of a resistor (20) and a capacitor (19). The diode is poled to allow power to flow towards the load but to block the return of power caused by demagnetisation at the hv transformer (6) during the non-active phase of the dc/ac converter. This blocked power passes to the capacitor. The capacitor is chosen so that the x-ray voltage drops at switch-off at no more than twice the speed at which is rises at switch-on. ADVANTAGE - Max. power with no extra power store. Reduction at ripple in dc. supply voltage.