:
U(t) = Umcoswt, I(t) = Imcos(wt - j)(. (149.1) (149.11)). cos(wt - j),
, . , ácos2wtñ = 1/2, ásinwtcoswtñ = 0,
(152.1)
(. . 216) , Umcosj = RIm.
( ) . .
, (152.1)
(152.2)
cosj .
(152.2) , , , , . , cosj = l = IU. (R = 0), cosj = 0 , . cosj , , I, , , . cosj, 0,85.
18.1. , v=2 , t = 0 , 0 =6, v0 = 14 /. . [6,1 ]
18.2. 30 , , , 1,5 . , 2 , p/3. [ = 0,04cos(pt + p/3)]
18.3. m1 = 500 m2=400 (D l =15 ). , : 1) ; 2) . [1) 0,78 ; 2) 1,25]
18.4. 25 . , , . [7,2 ]
18.5. , D l =16 , : n1 = 10 , n26 . l1 l2 [l1 ~9 , l2 =25 ]
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18.6. , 50, 5 2 . 150 . , . (0,3 ]
18.7. , 8 , 2 p/4. , . , . [x = 0,037s (pt/4 + p/8)]
18.8. , x = cospt y = cospt/2. . [2y2 x = 1]
18.9. , 100 , . . [286]
18.10. 25 , 10 1 . Qm = 1 . : 1) ; 2) ; 3) . [1) 3,14 ; 2) 0,06; 3) U = 100-20tcos 636pt]
18.11. 110 110 . , 0,5 . . [60]
18.12. 50 50 10 2, 3000 . , 60. [4,1 ]
18.13. , 32 120 , , 1 . , 5 . [119 ]
18.14. 5 2 . 1 0,1 . , . [100]
19
