conversion_td5_1.py

Created by famille-bvc

Created on December 12, 2023

1 KB


probleme 1 : MCC hacheur serie
a=alpha

hacheur serie : covertisseur 
d'energie DC fixe DC variable
et abaissseur de tension

**equations par phases :**
  
0<t<aT
T ON et D OFF
vs = ve
is = it
Vl = Ve - E = Ve - E = Ldis(t)/dt
Is = (Ve-E)/L *t + Is min

aT < t < T
T OFF et D ON
Vs = 0
Is = Id
Ldis/dt = -E = dis/dt = -E/L
Is = -E/L * (t-aT) + Is max

**Tracer vs et is avec a = 0.7**

on prend sur l'axe des ordonne :
vs, Imax et Imin
axe des abcisse : aT T

Vs part de Ve (à l'horizontal) et
descend à la vertivale aT puis 
hor jusqu'a T

Is part de Imin et monte jusque
Imax à aT et descend jusqua Imin
a T

**relation entre E et Vsmoy**

Vs = Vl + E = Ldis/dt + E

Vsmoy = Vlmoy + Emoy 
Vsmoy = E car Vl = 0

**expression de Vsmoy = f(a)**

Vsmoy= 1/T integ(vs(E)dt,0,T)

= 1/T (integ(vs(t)dt,0,aT)
+ integ(vs(t)dt,aT,T))

= 1/T (integ(Ve dt,0,aT)
+ integ(0 dt,aT,T)

= 1/T ([Ve*t] de 0 à aT) + 0

= 1/T (Ve a T - 0) = aVe

graph : Aire VS/T = Ve*aT/T = aVe


deltaIs = Imax - Imin
= (Ve-E/L)*aT

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