Question

Problem A 460-V, four-pole, 60-Hz, Y-connected induction motor has the following equivalent circuit components Ri-0.15Ω R,-0.154 Ω X-1.066 Ω Xi,-20 Ω Xi-0.852 Ω Pmech 400 w Pmisc 150 Pcore 400 w Write MATLAB script to plot on two separate figures: a) the torque versus speed of the motor. b) the converted power versus speed of the motor.

fundamentals of machines

Answer 1

New Microsoft Word Document (6) Microsoft Word Ces Mailings Review View 10 12 13 14 15 16 ' 17- ו' 18 -ו 15' % Stator resistance % Stator reactance % Rotor resistance % Rotor reactance % Magnetization branch reactance r1 = 0.150; x1-0.852,: r2= 0.154; x2 1.066; xm- 20 V phase-460 / sqrt(3): % Phase voltage n sync-1800 w-sync= 1885; % Calculate the Thevenin voltage and impedance from Equations v th-v phase * (xm/ sqrt(r1 2+(x1 +xm)^2)); z-th-((j*xm) * (r1 + j*x 1)) / (r1 +j*(x1+xm)); r th-real(z th) x th-imagíz th) % now calculates the torque-speed characteristic for many slips between 0 and 1 s (0:1:50)/50; s(1) 0.001; nm = (1-s) * n-sync; % Mechanical speed % calculate torque for rotor resistance for ii-1:51 % Synchronous speed (r/min) % Synchronous speed (rads) % slip t_ind(i)-(3 * v_thA2 * r2 s(ii))/ (w syne* ((r th+ r2/s(ii)'2+ (x th+x2)^2)); end % Plot the torque-speed curve plot(nm,t ind,'Color,'k,'LineWidth' 2.0); hold on; xlabelfitn m Fontweight' 'Bold) ylabel( tau_find) ,Fontweight','Bold'); title (Induction Motor Torque-Speed Characteristic',Fontweight,'Bold); grid on;

Figure 1 File Edit View Insert Tools Desktop Window Help Induction Motor Torque-Speed Characteristic 300 250 200 150 100 50 200 400 600 800 1000 1200 1400 1600 1800 O A D ENG 16:53 us 07-04-2019 Type here to search