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Izmjenična struja

Izmjenična struja. B. a. v. b. v. c. d. B. b. v. c. a. v. d. B. b. I. v. a. c. v. d. I. B. c. v. 2r. I. v. a. l. I.  i = B2l  r sin  t. B. , 2rl = S. v.  i = B S  sin  t. .  i  u. r. . U o = BS . Maksimalna vrijednost

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Izmjenična struja

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  1. Izmjenična struja

  2. B a v b v c d B b v c a v d B b I v a c v d I B c v 2r I v a l I

  3. i= B2l r sin t B , 2rl = S v i= BSsin t  i  u r  Uo = BS Maksimalna vrijednost izmjeničnog napona u = Uo sin t Jednadžba izmj. nap. i = Blv sin i = Iosin t Jednadžba izmj. str. v =  r  =  t ,  = 2f l  2l

  4. u,i t u Uo Io T i

  5. u t Zadatak: Frekvencija gradske mreže je 50 Hz. Koliko puta u svakoj sekundi napon ima vrijednost 0? Za koje vrijeme napon gradske mreže naraste od nule do maksimalne vrijednosti? Rješenje: f = 50 Hz Uo N = 2 f = 250 Hz T t N =100 puta u sekundi , t =0,005 s =5 ms

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