MINISTERUL EDUCATIEI REPUBLICII MOLDOVAUNIVERSITATEA TEHNICĂ A MOLDOVEIFacultatea Calculatoare, Informatică şi MicroelectronicăCatedra Microelectronica si Ingineria BiomedicalaLucrare de laborator Nr.1Tema: Cercetarea proprietăţilor electricea materialelor conductoare
MINISTERUL EDUCATIEI REPUBLICII MOLDOVAUNIVERSITATEA TEHNIC A
MOLDOVEIFacultatea Calculatoare, Informatic i
MicroelectronicCatedra Microelectronica si Ingineria
Biomedicala
Lucrare de laborator Nr.1
MTB
Tema: Cercetarea proprietilor electricea materialelor
conductoare
A efectuat: st.gr.ISBM 131 Cerlat Marin
A verificat: I. Pocaznoi
Chiinu 20151.Schemele instalatiilor lucrarii de laborator
Fig. 2. Schema pentru msurarea dependenei detemperatur ai
rezistenei rezistoarelor cercetate
Fig. 3.Schema pentru msurarea dependenei detemperatura
rezistenei rezistorului bobinat de mare putere
2. Tabelele cu rezultatele msurrilor.NRnom(marcat)R
(masurat)Toleranta %
1154 000152 0001,31%
25625884,42%
33 3003 2102,8%
412 00012 0400,33%
510001 0100,98%
624 00025 1004.38%
76806583,34%
82 0002 0301.47%
91 0001 0201.76%
Toleranta: =(R - Rnom )/ Rnom *100%
T,
CR1R2R3R4R5R6R7R8R9
R,
R,
ppm/CR,
R,
ppm/CR,
R,
ppm/CR,
R,
ppm/CR,
R,
ppm/CR,
R,
ppm/CR,
R,
ppm/CR,
R,
ppm/CR,
R,
ppm/C
20152000
1.63588
4.21
3210
7.7212040
1.371010
2.4525100
9.87658
0.5062030
0.221020
0.243
3015000058232001200010002500064820201020
4015160058032101201010022490064420101010
5015180057532201204010032480064020001000
6015150057132301205010002480063719901010
7015180057032401206010002480063620001010
8015170056932501200010002470063319901030
9015160056732601211010002470063119701010
100151200563326012100100024600
63019601010
1. 2. R = 152000DR = 151800 - 151600DT = 90 - 70CRT =
(1/R)*(DR/DT)*10 E^-6CRT = 1.63*10^-6
3. R = 588DR = 571 - 569DT = 80 - 60CRT = (1/R)*(DR/DT)*10 ECRT
= 4.21*10^-6
4. R = 3210DR = 3220 - 3250DT = 50 - 80CRT = (1/R)*(DR/DT)*10
E^-6CRT = 7.72*10^-6
5. R = 12040DR = 12060 - 12040DT = 80 - 50CRT = (1/R)*(DR/DT)*10
E^-6CRT = 1.37*10^-6
6. R = 1010DR = 1003 - 1002DT = 50 - 40CRT = (1/R)*(DR/DT)*10
E^-6CRT = 2.45*10^-6
7. R = 25100DR = 25000 - 24800DT = 50 - 30CRT = (1/R)*(DR/DT)*10
E^-6CRT = 9.87*10^-6
8. R = 658 DR = 648 - 630DT = 100 - 30CRT = (1/R)*(DR/DT)*10
E^-6CRT = 0.5068*10^-6
9. R = 2030DR = 2030 - 1990DT = 60 - 20CRT = (1/R)*(DR/DT)*10
E^-6CRT = 0.22106`*^-6
10. R = 1020DR = 1020 - 1000DT = 50 - 30CRT = (1/R)*(DR/DT)*10
E^-6CRT = 0.24310^-6
Temperatura rezistorului R2, CI, mAU, VR, P, Wdisipat de R2
202450.208120
22.527.25.720.209155
27.547.49.950.209471
37.510627.50.2592915
40107.328.60.2663068
45107.328.30.2633036
52107.228.00.2613001
67.5122320.2623904
75131340.2594454
92170400.2356800
T=Tcam + 25*Ut ;
Calculam Puterea disipata(P=UI):1. P = 5 x 24 =120 W2. P = 5.72
x 27.2 = 155 W3. P = 9.95 x 47.4 = 471 W4. P = 27.5 x 106 = 2915
W5. P = 28.6 x 107.3 = 3068 W6. P = 28.3 x 107.3 = 3036 W7. P = 28
x 107.2 = 3001 W8. P = 32 x 122 = 3904 W9. P = 34 x 131 = 4454 W10.
P = 40 x 170 = 6800 W
Calculam Resistenta (R=P/I2)1. R = 120 / 242 = 0.2082. R = 155 /
27.22 = 0.2093. R = 471 / 47.42 = 0.2094. R = 2915 / 1062 = 0.2595.
R = 3068 / 107.32 = 0.2666. R = 3036 / 107.32 = 0.2637. R = 3001 /
107.22 = 0.2618. R =3904 / 1222 = 0.2629. R = 4454 / 1312 =
0.25910. R = 6800 / 1702 = 0.235
Calculam valoarea maxima a CRT pentru R2R = 0.208DR = 0.266 -
0.261DT = 52 - 40CRT = (1/R)*(DR/DT)*10 E^-6CRT =0.496545*10^-6
