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Load balancing system for ups rectifiers

  • US 4,114,048 A
  • Filed: 07/18/1977
  • Issued: 09/12/1978
  • Est. Priority Date: 03/10/1976
  • Status: Expired due to Term
First Claim
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1. A system for supplying a load with alternating current from a plurality of adjustable direct current voltage sources with said plurality of voltage sources including a like plurality of rectifier means supplied with alternating current from a power supply common to all voltage sources for generating a corresponding direct current voltage and the system further including a like plurality of inverter means each associated with one of said rectifier means for supplying a corresponding alternating current to said load, comprising:

  • means associated with one of said voltage sources for sensing direct current supplied therefrom and for deriving a signal representative of said supplied direct current;

    means associated with each of said voltage sources for deriving a reference signal representative of the average of the direct currents flowing from all of said sources;

    means responsive to said current representative signal and to said reference signal for generating an error signal representative of a discrepancy between said current representative signal and said reference signal; and

    means responsive to said error signal for adjusting the direct current voltage of said one source to compensate for said discrepancy.

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