Tube current is the all-important parameter of the X-ray machine; it affects the reciprocity between the X-ray and the others material The control method of the tube-current is introduced in this paper, which is supplied the high-frequency switched mode power supply. The method can implement the tube current precision control adopting the current feedback, the filament current feedback and the compensation of the space charge effect. It can realizes the tube-current linear control and nonlinear compensation when the tube voltage varying in large range. The method is designed using pulse modula...
