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voltage compareing

#5900  Permalink Top

voltage compareing

Jun-08-15 13:50:46

Hi There,
I want to compare VoltageSensor vMeter.v with 26.5 volt raference voltage.
If vMeter.v>26.5 then do something else ....

But with this code vMeter.v always act like bigger then 26.5. I know during simulation vMeter goes to below 26.5.

What's wrong?
Do you have any idea?

Oki



Code:


model lab2b

  parameter Real xPnom(start = 1500);

  Real xIdc;

  Modelica.Blocks.Interfaces.RealInput Pneed;

  Modelica.Electrical.Analog.Interfaces.NegativePin pin_n;

  Modelica.Electrical.Analog.Interfaces.PositivePin pin_p;

  Modelica.Electrical.Analog.Sensors.VoltageSensor vMeter;

  Modelica.Blocks.Tables.CombiTable1D Tnd1(tableOnFile = true, tableName = "leff", fileName = "C:/p/deff.txt");

  Modelica.Electrical.Analog.Sources.SignalCurrent SD;

equation

  Tnd1.u[1] = Pneed / xPnom;

  xIdc = Pneed / vMeter.v * Tnd1.y[1];

  if vMeter.v > 26.5 then

    SD.i = 10;

  else

    SD.i = 0;

  end if;

  connect(SD.n, pin_n);

  connect(SD.p, pin_p);

  connect(vMeter.n, pin_n);

  connect(vMeter.p, pin_p);

end lab2b;

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