language simscape

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Rafael Araújo
Rafael Araújo 2012-5-8
language simscape
I'm having difficulty build a model of an inductor in simscape actually the model already built, but this error occurring in the simulation, the following error appears: "Number of equations Exceeds number of variables," what should I do to fix this ?
follows the code of the inductor:
component indutorhisterese < foundation.electrical.branch
%indutorhisterese
parameters
N = 700;%Número de espiras
R = { 0.6914, 'Ohm' }; %Resistência interna
lm = {1,'m'}; %lm
A = {105e-6,'m^2'};%Área do núcleo
alfa = 50e-6;%admensional He=H+alfa*M correção de Weiss para o ferromagnetismo, parâmetro da equação de Langevin
Ms = {1.63e6,'A/m'}; %Magnetização de saturação, parâmetro da
equação de Langevin
aa = {60,'A/m'};
uo = {4*pi*1e-7,'H/m'};
k = {52,'A/m'}% k=n*Ep, números de pontos de grampeamento vs a energia média para superá-los;
c = 0.1;%admensional
end
variables
B = {0,'(H*A)/m^2'};
H = {0,'A/m'};
He = {0,'A/m'};
iM = {0;'A/m'}; %iM=M não pode-se começar variaveis com M ou L
Man = {0;'A/m'};
Mir ={0;'A/m'};
delta=0;% parâmetro direcional tal que delta=+1 para dH/dt>0, no ramo ascendente do laço e delta=-1 para dH/dt<0, no ramo
descendente do laço.
dMandHe=0;
dMdB={0,'m/H'};
dMirdBe={0,'m/H'};
end
function setup
B=0;
iM=0;
end
equations
B=={1,'(H*A)/m^2'}*sin(2*pi*time);
if B.der<0
delta==-1;
else
delta==+1;
end
iM == (B/uo)-H;
He==(H+alfa*iM);
if(abs((He)/aa) < 0.1 )
Man==Ms*He/(3*aa);
dMandHe==Ms/(3*aa);
else
Man == Ms*((1/tanh(He/aa))-(aa/He));
dMandHe == (Ms/aa)*(1-(1/tanh((He/aa))^2 + (aa/He)^2));
end
Mir==((iM-c*Man)/(1-c));
dMirdBe==[Man-Mir]/[uo*k*delta];
if dMirdBe <0
dMdB == ((c*dMandHe/uo))/(1 + c*(1-alfa)*dMandHe);
else
dMdB == ((1-c)*dMirdBe + (c*dMandHe/uo))/(1 + c*dMandHe*(1-alfa) + uo*(1-alfa)*(1-c)*dMirdBe );
end
(iM + {1,'s'}*iM.der)==iM + dMdB*({1,'s'}*B.der);
(H + {1,'s'}*H.der)==(B + {1,'s'}*B.der)/uo-(iM + {1,'s'}*iM.der);
i == H*lm/N;
v == R*i + N*A*B.der;
end
end
in constructing the model no errors occur, but perhaps not an error occurs in the structure of language, but occurs in logic programming.
Thanks.
  1 个评论
Kaustubha Govind
Kaustubha Govind 2012-5-9
I don't have any experience with SimScape, but I thought it might help you to look at the discussion here: http://www.mathworks.com/matlabcentral/newsreader/view_thread/287037

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