Pulse power supply for regenerating magnetic energy

Abstract

In order to provide a pulse power supply device using regenerating magnetic energy stored in a discharge circuit to a capacitor so as to use it as next discharge energy and supplying a bipolar pulse current with high repetition, a bridge circuit is composed of four inverse-conductive semiconductor switches, a charged energy source capacitor is connected to a DC terminal of the bridge circuit, and an inductive load is connected to its AC terminal. A control signal is supplied to gates of the inverse-conductive semiconductor switches, and a control is made so that when a discharge current rises, is maintained or is reduced, all the gates are turned off, and the magnetic energy of the electric current can be automatically regenerated to the energy source capacitor by a diode function of the switches. Further, a large-current power supply is inserted into a discharge circuit so as to replenish energy loss due to discharge, thereby enabling high-repetition discharge.

1 . A pulse power supply device for supplying a bipolar pulse current to an inductive load with high repetition and regenerating residual magnetic energy of a system so as to use it for next discharge, wherein 
 an energy source capacitor initially charged is connected to a DC terminal of a bridge circuit composed of four inverse-conductive semiconductor switches, and the inductive load is connected to its AC terminal,    a control circuit for giving a control signal to gates of the inverse-conductive semiconductor switches and controlling an on/off state of the semiconductor switches is further provided,    the control circuit controls pairs of the four inverse-conductive semiconductor switches composing the bridge circuit positioned on diagonal lines, respectively, so that the pairs are turned on simultaneously or alternately, and controls the pairs so that when at least one of the paired two inverse-conductive semiconductor switches is on, the other paired inverse-conductive semiconductor switches are off.    
     
     
         2 . The pulse power supply device using regenerating magnetic energy according to  claim 1 , wherein a low-voltage large-current power supply is inserted in series with the inductive load so as to replenish lost energy due to discharge so as to increase or decrease next discharge current.  
     
     
         3 . The pulse power supply device using regenerating magnetic energy according to  claim 1 , wherein the inverse-conductive semiconductor switches are any one kind of power MOSFETs, inverse-conductive GTO thyristors and units constituted so that diodes and semiconductor switches such as IGBT and the like are connected in parallel.  
     
     
         4 . The pulse power supply device using regenerating magnetic energy according to claims  1 , wherein one of the two pairs of inverse-conductive semiconductor switches is replaced by diodes.  
     
     
         5 . The pulse power supply device using regenerating magnetic energy according to  claim 2 , wherein the inverse-conductive semiconductor switches are any one kind of power MOSFETs, inverse-conductive GTO thyristors and units constituted so that diodes and semiconductor switches such as IGBT and the like are connected in parallel.  
     
     
         6 . The pulse power supply device using regenerating magnetic energy according to  2 , wherein one of the two pairs of inverse-conductive semiconductor switches is replaced by diodes.  
     
     
         7 . The pulse power supply device using regenerating magnetic energy according to  3 , wherein one of the two pairs of inverse-conductive semiconductor switches is replaced by diodes.