villamoteur.py

Created by klfraimbow

Created on February 03, 2022

1.42 KB


Purement capacitif (Cparfait)
i est en quadrature avance sur u: O=-pi/2
<p>=0 
cos(-pi/2)=0
sin(-pi/2)=0
P=0
Q=-UI= -I**2/Cw;  -U**2 * Cw

Capacitif(C+resistance)
i est en avance sur u: -pi/2 < O > 0
0< <p> < <p>max
0<cos(0)<1
U*I*cos(O)

Resisif
i et u sont en phase: O=0
<p>max
cos(0)=1
sin(0)=0
P=UI= U**2/R = R*I**2
Q=0

Inductif(B+Resistance)
i est en retard sur u: 0 < O > pi/2
<p>max > <p> > 0
1>cos(0)>0
UI*cosO

Purement inductif:(Bparfaite)
i est en quadrature retard sur u: O= pi/2
0
cos(pi/2)=0
sin(pi/2)=1
0
Q=UI= Lw*I**2 ;  U**2/Lw*I**2 ; U**2/Lw

Pactive: P=<p>

P=U*I*cos(O)     P en watt (W)
P>0              U(V) valeur eff de u 
                 I(A) valeur eff de i 
                cos(O):facteur de puissance

Preactive Q      Q en voltampere (VAR)
Q=UI*sin(O)      U(V) valeur eff de u 
P>0              I(A) valeur eff de i 
                cos(O):facteur de puissance

Papparente S (apparament consomme ou recue)
S=U*I           S est la puissance app en voltampere (VA)
P=S*k           U(V) valeur eff de u 
0<k<1           I(A) valeur eff de i 
P=UI*cos*(O)=S*cos(O)
k=cos(O)=P/S=P/U*I

----------------------------
S= sqrt(P**2+Q**2)
P=UI*cos(O)
Q=UI*sin(O)    => cos=P/S  sin=Q/S  tan=Q/P
S=UI

EN triphase on rajoute srqt3 devant 

Pa(W)=sqrt3 *U*I*cos0 
Pu(W)=Tu(N.m)*w(rad.s)

w=2pi*n(tr.s)
= 2pi*n(tr.min)/60

glissement:
g% = ns-n/ns * 100 

I2=U2/Z

I2= S2/U2 

m=U2n/U1n = U2/U1 = N2/N1
Z2n=U2n/I2n 


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