Induction

clear all

close all

clc

% Parameters value

V=400/sqrt(3); % Applied voltage in Volt

Ph=3; % No of Phases

P=4; % No of Poles

R1=0.2; % Stator Resistance in Ohm

R2=0.2; % Rotor resistance in Ohm

x1=0.1; % Stator Inductance in Ohm

x2=0.1; % Rotor Inductance in Ohm

f=[50:25:150]; % Frequency range from 50Hz to 150 Hz in the interval of 25Hz

i=length(f)

for x=1:i

    ws=4*pi*f(x)/P;% Angular Speed

    Ns=120*f(x)/P;%Synchronous Speed

 for n=1:200 % Varying slip

     s=n/200; % Slip Calcultaion

     N(n)=Ns*(1-s) % Rotor Speed

     zeq=(R1+R2*(1-s)/s)+(x1+x2);% Equivalence impedance calculation

     T(n)=3*((V^2)*(R2/s))/(ws*((R1+(R2/s)^2))+((x1+x2)^2));

     plot(N,T)

     hold on

     grid on

     title(‘torque vs speed characteristic of Induction motor’)

     xlabel(‘RPM’)

     ylabel(‘Torque’)

     legend(’50Hz’,’75Hz’,’100Hz’,’125hz’,’150Hz’)

 end

end