GRAFOANALITISKO DARBU UZDEVUMI
GRAFOANALITISKO DARBU UZDEVUMI
GRAFOANALITISKO DARBU UZDEVUMI
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2<br />
Z2 = R2<br />
+<br />
otrā zara jaudas koeficients<br />
strāva otrā zarā<br />
strāvas projekcijas<br />
Spriegumi uz otrā zara elementiem<br />
Trešā zara pilnā pretestība<br />
2<br />
2 2<br />
X<br />
L2 = 30 + 40 = 50Ω,<br />
tg φ 2 = (X L2 )/R 2 = 40/30 = 1,33;<br />
cosφ 2 = 0,6;<br />
sin φ 2 = 0,8;<br />
I 2 = U/Z 2 = 150/50 = 3 A,<br />
I a2 = I 2 * cosφ 2 = 3*0,6 = 1,8 A,<br />
I X2 = I 2 * sin φ 2 = 3*0,8 = 2,4 A.<br />
U R2 = I 2 *R 2 = 3*30 = 90 V,<br />
U L2 = I 2 *X L2 = 3*40 = 120 V.<br />
2 2<br />
2 2<br />
Z3 = R3<br />
+ XC3<br />
= 40 + 30 = 50Ω,<br />
trešā zara jaudas koeficients<br />
tg φ3 = (-X C3 )/R 3 = (-30)/40 = - 0,75;<br />
cos φ 3 = 0,8;<br />
sin φ = - 0,6,<br />
strāva trešajā zarā<br />
I 3 =U/Z3 = 150/ 50 = 3 A,<br />
strāvas projekcijas<br />
I a3 = I 3 * cos φ 3 = 3*0,8 = 2,4;<br />
I X3 = I 3* sin φ3 = 3*(- 0 ,6) = -1,8 A.<br />
Spriegumi uz trešā zara elementiem<br />
R3 3 3<br />
3<br />
U = I *R = 3*40 = 120 V;<br />
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