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Résumé Cours électronique de puissance DC -DC Hacheur

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Résumé avec formules et graphique (courbes...) sur les hacheurs DC - DC complets

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Uploaded on
August 30, 2021
Number of pages
24
Written in
2020/2021
Type
Summary

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Philosophie des montages hacheurs
Obtenir une tension continue réglable ?
Vs
η ≪1
Ve Vs Ve Vs Ve
Tension continue
Vs
Off
Ve
Vs
Ve Vs = 0
t
Ve Vs αTd Td
η = 1 Vs = αVe
Tension discontinue
On

Ve Vs = Ve Quelle solution choisir ?

Commande en amplitude Commande en durée
simplicité nécessité d’un filtre
rapidité de réglage de Vs réponse plus lente
Introduction à la conversion continu/continu 1
rendement faible rendement excellent

, Contraintes de filtrage

Obtenir une tension continue réglable ?
K1
Lf Les commutations
 Surintensité
Surtension
Ve K2 Vs àdel’
laK2 résultentdedeK1
fermeture
ouverture
Cf celles de K1

Contraintes de filtrage
module du filtre
fmax f0 fd
Par principe, le
f filtrage ne sera pas
bande passante
idéal. L’ondulation
résiduelle est fixée
par le choix de la
fréquence propre
Introduction à la conversion continu/continu du filtre 2

, Transferts d'énergie

0 ≤ t ≤ αTd αTd ≤ t ≤ Td

K1 K1
Lf Lf
Ve K2 Vs Ve K2 Vs
Cf Cf



La source alimente la charge Le filtre alimente la charge




conduction Vs discontinue
Cf


Introduction à la conversion continu/continu 3
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