App Designer Error: Unable to perform assignment because the left and right sides have a different number of elements.

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Tatenda Chirima
Tatenda Chirima 2021-4-16
回答： Aghamarsh Varanasi 2021-4-22
I'm currently trying to adapt this code for a induction motor speed control method to a web app and I keep getting the error in the title, please help
clear all
close all
clc
Vl1=input('Enter the first Suppy Voltage (line to line) RMS value: ');
Vl2=input('Enter the second Suppy Voltage (line to line) RMS value: ');
Vl3=input('Enter the third Suppy Voltage (line to line) RMS value: ');
Vl4=input('Enter the fourth Suppy Voltage (line to line) RMS value: ');
Vl5=input('Enter the fifth Suppy Voltage (line to line) RMS value: ');
P=input('Enter the number of poles: ');
Rs=input('Stator Resistance: ');
Rr=input('Rotor Resistance: ');
Xs=input('Stator Leakage Reactance @ 50 Hz frequecny: ');
Xr=input('Rotor Leakage Reactance @ 50 Hz frequecny: ');
Ls=Xs/(2*pi*50);
Lr=Xr/(2*pi*50);
Wsync1=4*pi*50/P;
m=1;
for Wrotor1=0:0.002:Wsync1
Tmf1(m)=(3*(((Vl1^2)*Rr/((Wsync1-Wrotor1)/Wsync1))/((Rs+Rr/((Wsync1-Wrotor1)/Wsync1))^2+(2*pi*50*Ls+2*pi*50*Lr)^2))/Wsync1); %star connected
m=m+1;
end
m=1;
for Wrotor1=0:0.002:Wsync1
Tmf2(m)=(3*(((Vl2^2)*Rr/((Wsync1-Wrotor1)/Wsync1))/((Rs+Rr/((Wsync1-Wrotor1)/Wsync1))^2+(2*pi*50*Ls+2*pi*50*Lr)^2))/Wsync1);
m=m+1;
end
m=1;
for Wrotor1=0:0.002:Wsync1
Tmf3(m)=(3*(((Vl3^2)*Rr/((Wsync1-Wrotor1)/Wsync1))/((Rs+Rr/((Wsync1-Wrotor1)/Wsync1))^2+(2*pi*50*Ls+2*pi*50*Lr)^2))/Wsync1);
m=m+1;
end
m=1;
for Wrotor1=0:0.002:Wsync1
Tmf4(m)=(3*(((Vl4^2)*Rr/((Wsync1-Wrotor1)/Wsync1))/((Rs+Rr/((Wsync1-Wrotor1)/Wsync1))^2+(2*pi*50*Ls+2*pi*50*Lr)^2))/Wsync1);
m=m+1;
end
m=1;
for Wrotor1=0:0.002:Wsync1
Tmf5(m)=(3*(((Vl5^2)*Rr/((Wsync1-Wrotor1)/Wsync1))/((Rs+Rr/((Wsync1-Wrotor1)/Wsync1))^2+(2*pi*50*Ls+2*pi*50*Lr)^2))/Wsync1);
m=m+1;
end
plot(Tmf1);
hold on;
plot(Tmf2);
plot(Tmf3);
plot(Tmf4);
plot(Tmf5);
hold off;
ylabel('Torque(N-m)');
xlabel('Rotor Speed(Rad/s)');

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回答（1 个）

Aghamarsh Varanasi
Aghamarsh Varanasi 2021-4-22
Hi,
The script seems to run with out any error for the inputs of type 'double'. Please check if the input from appdesigner is passed as a 'string' to the script, as the default type of input in 'edit field' is 'string'.
Hope this helps

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