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Control apparatus for electric generator

  • US 5,231,344 A
  • Filed: 07/20/1992
  • Issued: 07/27/1993
  • Est. Priority Date: 01/17/1990
  • Status: Expired due to Term
First Claim
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1. A control apparatus for an electric generator having an armature winding and afield winding conformed for drive by rotation of an engine of a vehicle, said apparatus including means for detecting the actual voltage of a battery employed in the vehicle;

  • means for comparing the actual voltage with a predetermined voltage;

    converting means for converting the output of said comparing means to a first current command value;

    means responsive to a parameter affecting a field current of said field winding for generating at least one further current command value;

    a chopper for controlling the field current of said first winding;

    means for detecting the actual current flowing through the field winding;

    means for selecting between said first and said further current command value to provide a final current command value;

    comparator means for generating a signal indicative of a deviation between said final current command value and said actual current flowing through the field winding and for applying the deviation signal t pulse width control means for controlling the duty of said chopper to render said deviation to be substantially zero, so that a current feedback loop from the field winding to said pulse width control means and a voltage feedback loop from the battery to said comparing means are formed.

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