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Apparatus for regulating the flow-through amount of a flowing medium

  • US 5,265,594 A
  • Filed: 10/30/1991
  • Issued: 11/30/1993
  • Est. Priority Date: 10/30/1990
  • Status: Expired due to Fees
First Claim
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1. An apparatus for regulating the flow-through amount of a flowing medium comprising:

  • a valve having an input connectable to a source of flowing medium, an output for said flowing medium, a valve opening disposed between said input and said output, and movable closure means for opening and closing said valve by varying the size of said valve opening;

    means for calculating a first actual value, corresponding to the actual flow-through amount of said flowing medium through said valve opening;

    means supplied with a control signal for controlling the position of said closure means in said valve opening dependent on a characteristic of said control signal;

    first regulator means, supplied with a rated value for said flow-through amount and connected to said means for calculating a first actual value to receive said first actual value therefrom, for generating a first regulating variable by negative feedback for use in controlling the position of said closure means so that a difference between said rated value and said first actual value is driven toward zero;

    means for calculating a second actual value, corresponding to the actual position of the said closure means in said opening;

    second regulating means, supplied with said first regulating variable as a rated value and connected to said means for calculating a second actual value to receive said second actual value therefrom, for generating a second regulating variable by negative feedback for use in controlling the position of said closure means so that a difference between said first regulating variable and said second actual value is driven toward zero;

    means for calculating a third actual value, corresponding to an actual value of said control signal characteristic; and

    third regulating means, supplied with said second regulating variable as a rated value and connected to said means for calculating a third actual value to receive said third actual value therefrom and connected to said means for controlling, for generating a third regulating variable forming said control signal for controlling the position of said closure means so that a difference between said second regulating variable and said third actual value is driven toward zero.

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