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E-beam high voltage switching power supply

  • US 5,566,060 A
  • Filed: 05/22/1995
  • Issued: 10/15/1996
  • Est. Priority Date: 04/13/1992
  • Status: Expired due to Fees
First Claim
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1. Circuit means for generating a ground level voltage feedback signal for controlling the output voltage of one of a plurality of dc--dc converter modules having their outputs connected in series to form a supply output lead, each module including a switching means for producing a pulsating voltage of controlled duty cycle, an inductor means for converting said pulsating voltage into a smooth direct current, an inverter means for producing from said direct current an alternating current through the primary of a transformer, said transformer having at least one secondary winding inductively coupled to said primary winding for producing an output voltage of said module, said circuit means for generating the output voltage feedback signal comprising:

  • a separate transformer winding inductively coupled with said primary and said secondary for producing an ac voltage whose magnitude is proportional to the dc output voltage of said dc--dc converter module;

    rectifier means responsive to said ac voltage produced by said separate transformer winding having a connection with a capacitor for producing a dc voltage on two output lines which voltage is proportional to the dc output voltage of said dc--dc converter module;

    current sensing means connected to said supply output lead for producing an output voltage proportional to the current flowing through the output of all of said series connected dc--dc converter modules;

    controlled current source means connected across said two output lines for applying the output voltage of said current sensing means to produce a current proportional to the output current of said dc--dc converter module wherein said controlled current source means draws current out of said two output lines to create an accurate simulation of the module output load.

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