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System for operating a plurality of power supply modules in parallel

  • US 5,550,461 A
  • Filed: 11/23/1993
  • Issued: 08/27/1996
  • Est. Priority Date: 11/25/1992
  • Status: Expired due to Term
First Claim
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1. A system, comprising at least two power supply modules which together feed a load with a DC supply voltage V0, are connected in a redundant configuration, and are each coupled to the load via a respective blocking diode whose cathode carries the voltage V0, each module comprising a feedback loop for its output voltage, which loop includes a voltage controller and a comparator whose positive input receives a respective reference voltage, each module also comprising, in order to realise said feedback, two output voltage terminals, one of which is provided on the anode and the other on the cathode of its respective blocking diode, which system is characterized in that the two output voltage terminals of each power supply module are connected to inputs of an output voltage selection means suitable to supply a predetermined fraction (k) of the cathode voltage of its respective blocking diode when its respective blocking diode is in the conductive state, and the predetermined fraction (k) of the anode voltage of its respective blocking diode when its respective blocking diode is blocked.

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