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# Izmjenična struja - PowerPoint PPT Presentation

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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## PowerPoint Slideshow about ' Izmjenična struja' - mitchell-jeremiah

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Presentation Transcript

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= BSsin t

i  u

r

Uo = BS

Maksimalna vrijednost

izmjeničnog napona

u = Uo sin t

izmj. nap.

i = Blv sin

i = Iosin t

izmj. str.

v =  r

 =  t

,  = 2f

l  2l

t

u

Uo

Io

T

i

t

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