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I use OM 1.8.1 and here is my code:
model Hysteretic_curve
parameter Real N = 1;
parameter Real l = 0.816;
parameter Real Ms = -1500000;
parameter Real a = 350;
parameter Real alpha = 0.0007;
parameter Real c = 0.001;
parameter Real k = 265;
Real deridt,i,delta,B,derH,derMan;
Real H(start = 0),Man(start = 0),M(start = 1e-005);
equation
i = 2000 * sin(314 * time);
deridt = 2000 * 314 * cos(314 * time);
derH = (N * deridt) / l;
der(H) = derH;
derMan = Ms * ((derH + alpha * der(M)) / (a * (sinh((H + alpha * M) / a)) ^ 2) + a / (H + alpha * M) ^ 2 * (derH + alpha * der(M)));
der(Man) = derMan;
if der(H) > 0 then
delta = 1;
else
delta = -1;
end if;
der(M) = ((1 - c) * der(H) * (Man - M)) / ((1 - c) * delta * k - alpha * (Man - M)) + c * der(Man);
B = 0.000001256* (H + M);
end Hysteretic_curve;
It´s worked now, but results aren´t good. Problem is still with Man. I´ve tried to make it in Simulink and it works fine , but I need it in Modelica ....
Thank you! Now there are not errors, but the current is no more sunisoidal and all results are wrong. Have you an idea, what´s wrong now?
Hello,
I am new in Modelica and Ihave problem with Jiles Atherton hysteretic model. Here is my code:
model Hysteretic_curve
parameter Real N = 1;
parameter Real l = 0.816;
parameter Real Ms = 1500000.0;
parameter Real a = 350;
parameter Real alpha = 0.0007;
parameter Real c = 0.001;
parameter Real k = 265;
constant Real pi = 3.14;
discrete Real i(start = 0),H(start = 0),delta(start = 0),Man(start = 0),M(start = 0),B(start=0);
equation
i = sqrt(2) * 2000 * sin(314 * time);
H = N * i / l;
Man = Ms * (1 / tanh((H + alpha * M) / a) - a / (H + alpha * M));
if der(H) > 0 then
delta = 1;
else
delta = -1;
end if;
der(M) = ((1 - c) * der(H) * (Man - M)) / ((1 - c) * k - alpha * (Man - M)) + c * der(Man);
B=1.2566e-6*(H+M);
end Hysteretic_curve;
It´s writen out 4 errors :
Translation 17:41:43 0:0-0:0 Internal error Transformation Module failed!
Translation 17:41:43 0:0-0:0 Internal error sorting equations(strongComponents failed)
Translation 17:41:43 0:0-0:0 Internal error BackendDAETransform.analyseStrongComponentBlock failed
Translation 17:41:43 0:0-0:0 Internal error Sorry - Support for Discrete Equation Systems is not yed implemented
It would be great if somebody could help. Thanks.
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