Formule fizica RLC



I= 

√   E=  √  RLC serie i=Imaxsint a.) XL>Xc => UL> Uc circuit inductive

                                         √  √            

U=I

Zs=impedanta; Zs= U=IZs tg

=

=

u=Imaxsin(

b.) XL < Xc => UL < Uc circuit capacitiv tg

=

=

Zs=

u=Imaxsin(

c.) Rezonanta tensiunilor : XL = Xc => U L = Uc XL=XC => L2 tg

=

=>

; T0=

rezonanta=0;

Zrez=

=> ZS=R=minim

U=UR => Irez=

==maxim

Q=factor de calitate

 =   

Q=

Z0=impedanta specifica ; Z0=

 

RLC paralel u=Umaxsin



   i=       i=      ( ) i=   R

L

C

a.) XC>XL => IC
     

I=U

 

I=



ZP=

 

       

    )   - arctg(R(  )))  

tg

=> tg

i=

(sin

= R(

b.) XC < XL => IC > IL (Circuit capacitiv)

     

I=U

 

I=



ZP=

 

tg



    )

= R(

(sin  + arctg(R(    )))   

i=

c.) Rezonanta curentilor : XL = XC => IC=IL



rez=0

I=IR=min Zrez=



=R=max  

   

XL = XC => L

=

=>

=

Q’=factor de supracurent

 

Q’=R

 ; T =√    √  √  0