High voltage supply system for medical equipment

Claim 1

A DC high voltage generation system for medical equipment comprising: a variable magnetic leakage transformer including primary, secondary and control windings; a capacitor type multiple boosting circuit comprising a plurality of capacitors cascaded through diodes to each other, said capacitor type multiple boosting circuit being coupled to said secondary of said variable magnetic leakage transformer and forming a resonant circuit with said variable magnetic leakage transformer; a driving circuit coupled to said primary winding of said variable magnetic leakage transformer for driving said system at a resonant frequency of the resonant circuit formed by said capacitor type multiple boosting circuit and said variable magnetic leakage transformer; and a pulse-amplitude feedback control circuit coupled to said control winding and a load of said DC high voltage generation system for pulse-amplitude controlling an output voltage of said DC high voltage generation system, said pulse-amplitude feedback control circuit comprising: a means for detecting a magnitude of said output voltage to said load; a means for presetting a reference voltage; a means for comparing said detected voltage with said reference voltage to produce a deviation voltage; and control transistors coupled to said control winding to act as a constant current source which in response to said deviation voltage pulse-amplitude control said output voltage.