Parse error at '='

Hey everyone,

I dunno what's wrong with this code, it displays this:

Error: File: der_MI.m Line: 23 Column: 8

The expression to the left of the equals sign is not a valid target for an assignment.

The codes are:

function pX=der_MI(t,X)

global R Lee Lrr Ler J V we cero Ide Sim

iae=X(1);ibe=X(2);ice=X(3);iar=X(4);ibr=X(5);icr=X(6);

wm=X(7);theta=X(8);

vae=sqrt(2)*V*sin(we*t);

vbe=sqrt(2)*V*sin(we*t-2*pi/3);

vce=sqrt(2)*V*sin(we*t-4*pi/3);

var=0;vbr=0;vcr=0;

ve=[vae;vbe;vce];vr=[var;vbr;vcr];v=[ve;vr];

ie=[iae;ibe;ice];ir=[iar;ibr;icr];ii=[ie;ir];

a=cos(theta);b=cos(theta+2*pi/3);c=cos(theta+4*pi/3);

Cic=[a,b,c;c,a,b;b,c,a];

L=[Lee,Ler*Cic;Ler*Cic',Lrr];

a=-sin(theta);b=-sin(theta+2*pi/3);c=-sin(theta+4*pi/3);

Cic=[a,b,c;c,a,b;b,c,a];

dL=[cero,Ler*Cic;Ler*Cic',cero];

pii = ...;

pwm = ...; %THIS IS WHERE IT SAYS THERE IS THE ERROR

ptheta = ...;

pX=[pii;pwm;ptheta];

end

And this is the main code:

% Modelo de la máquina de inducción en coordenas primitivas

clear all

clc

global R Lee Lrr Ler J V we cero Ide Sim

Re=0.02;Rr=0.03;Lde=0.1;Ldr=0.1;Lme=2;Lmr=2;Ler=2;J=800;

V=1;we=1; % parametros están en por unidad

% R = [Re,0,0,0,0,0;

% 0,Re,0,0,0,0;

% 0,0,Re,0,0,0;

% 0,0,0,Rr,0,0;

% 0,0,0,0,Rr,0;

% 0,0,0,0,0,Rr]

R=diag([Re,Re,Re,Rr,Rr,Rr]);

Sim=[1 -0.5 -0.5;-0.5 1 -0.5;-0.5 -0.5 1];

Ide=eye(3);

cero=zeros(3,3);

Lee=Lde*Ide+Lme*Sim;

Lrr=Ldr*Ide+Lmr*Sim;

t0=0; tf=2*377; % Tiempos en por unidad

X0=[0,0,0,0,0,0,0,0];%[iae(0) ibe(0) ice(0) iar(0) ibr(0) icr(0) wm(0) theta(0)

tic

[T,X]=ode23(@der_MI,[t0 tf],X0)

toc

iae=X(:,1);ibe=X(:,2);ice=X(:,3);

iar=X(:,4);ibr=X(:,5);icr=X(:,6);

wm=X(7);theta=X(8);

figure(1)

plot(T/377,X(:,7))

xlabel('tiempo [s]')

ylabel('w_m [pu]')

grid

for n=1:length(T)

ie=[iae(n);ibe(n);ice(n)];

ir=[iar(n);ibr(n);icr(n)];

dCic=... theta(n)

Te(n)==Ler*ie'*dCic*ir

end

figure(2)

plot(T,Te)

What do u think could be?

Answer 1

[Walter Roberson]

the ... on the line above is continuation . So you effectively have

pii = pwm = ptheta = pX = [something]

[Alberto Cadena Vaca]

Yes, you're right. thx a lot