untitled.m

电机的机械特性图

clear;
m1=3;
U1=220*sqrt(3);
R1=0.55;
R2=0.04;
P=2;
f=50;
omega=2*pi*f/P;
X1=0.265;
X2=0.565;
s=0.005:0.005:1;
Te=(m1*P*U1^2*R2)./s./(omega.*((R1+R2./^2+(X1+X2)^2);
figure(1)
plot(s,Te,'k-');
xlabel('转差率s');
ylabel('电磁转矩Te/(N.m)');
str_x=0.02;
text(str_x,max(Te)+100,strcat('U1=',num2str(int16(U1)),'V'),'Color','black');
title;
hold on;
for coef=0.75:-0.25:0.25
    U1p=U1*coef;
    Tel=(m1*P*U1p^2*R2)./s./(omega.*((R1+R2./s).^2.+(X1+X2)^2));
    plot(s,Tel,'k-');
    str=strcat('U1=',num2str(int16(U1p)),'V');
    str_y=max(Tel)+100;
    text(str_x,str_y,str,'Color','black');
end