Surse de Alimentare - Lucrare de laborator

Tema de laborator

Caracteristica de sarcina a unei surse de tensiune continua

Us=12,3V Is=1A.

1.Schema de montaj:

2.Tabel cu valori obtinute in urma masurarilor efectuate:

Us[V] 12,13 12,01 11,80 11,62 11,40 11,20 11

Is[mA] 0 50 100 150 200 250 300

10,80 10,60 10,33 10 9,64 9,26 8,88 8,5

350 400 500 600 700 800 900 1A

3.Rezolvarea in Matlab:

y=[ 12.13 12.01 11.80 11.62 11.40 11.20 11 10.80 10.60 10.33 10 9.64 9.26 8.88 8.5];

x=[0 50 100 150 200 250 300 350 400 500 600 700 800 900 1000];

figure(1)

plot(x,y,'b'); hold on

p1=12.13*0+12.01*50+11.80*100+11.62*150+11.40*200+11.40*250+11*300+10.80*350+10.60*400+10.33*500+10*600+9.64*700+9.26*800+8.88*900+8.5*1000;

p2=12.13+12.01+11.80+11.62+11.40+11.20+11+10.80+10.60+10.33+10+9.64+9.26+8.88+8.5;

p3=0+50+100+150+200+250+300+350+400+500+600+700+800+900+1000;

p4=50*50+100*100+150*150+200*200+250*250+300*300+350*350+400*400+500*500+600*600+700*700+800*800+900*900+1000+1000;

p5=p3*p3;

n=15;

a=(n*p1-p3*p2)/(n*p4-p5);

b=(p2*p4-p3*p1)/(n*p4-p5);

c= [0 1000];

d=[ 12.3 8.5 ];

plot(c,d, 'r')

a= -12.2Ω

b= 15.72V

Parametrii sursei echivalente:

r = 12.2Ω

E= 15.72V

4.Grafic