Secondary Rectifier For Buck-Derived Converters
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1 Secondary Recifier For Buck-Derived Converers Presened by Xinbo Ruan Aero-Power Sci-ech Cener Nanjing Universiy of Aeronauics & Asronauics
2 Full-wave, Full-Bridge and Curren Doubler Recifier Full-Wave Full-Bridge Curren Doubler Recifier
3 v rec Half-Wave Recifier Posiive cycle v rec Negaive cycle V = o half Vsec_ m 3 D
4 Derivaion of Full-Wave Recifier Two recifiers wih wo coupled windings share he filer. Posiive cycle v rec Negaive cycle
5 v rec Derivaion of Full-Wave Recifier v rec vrec
6 Operaion Principle of Full-Wave Recifier (1) D R1 v rec v rec D R2 T s /2 T s
7 Operaion Principle of Full-Wave Recifier (2) D R1 v rec v rec D R2 T s /2 T s
8 Operaion Principle of Full-Wave Recifier (3) D R1 v rec v rec D R2 T s /2 T s
9 Operaion Principle of Full-Wave Recifier (4) D R1 v rec v rec D R2 T s /2 T s
10 Relaionships of Full-Wave Recifier D R1 + v rec + D R2 v rec V V o sec_ m = D = eq 2D V = V = 2V half DR1 DR2 sec_ m 1 I = I = I 2 T s /2 T s DR1 DR2 o 1 Inducor curren can no flow in he negaive direcion.
11 Derivaion of Full-Bridge Recifier (1) Two recifiers share boh he winding and he filer. Posiive cycle v rec Negaive cycle
12 Derivaion of Full-Bridge Recifier (2) v rec
13 v rec v rec Derivaion of Full-Bridge Recifier (2)
14 Operaion Principle of Full-Bridge Recifier (1) v rec i DR4 T s /2 i DR3 T s
15 Operaion Principle of Full-Bridge Recifier (2) v rec i DR4 T s /2 i DR3 T s
16 Operaion Principle of Full-Bridge Recifier (3) v rec i DR4 T s /2 i DR3 T s
17 Operaion Principle of Full-Bridge Recifier (4) v rec i DR4 T s /2 i DR3 T s
18 Relaionships of Full-Bridge Recifier v rec V V V o sec_ m = D = eq = V = V 2D half DR1 DR2 sec_ m 1 I = I = I 2 T s /2 i DR3 T s Inducor curren can no flow in he negaive direcion DR1 DR2 o 18 i DR4
19 Derivaion of Curren-Doubler Recifier (1) Posiive Cycle v rec v rec
20 Derivaion of Curren-Doubler Recifier (2) Negaive Cycle + v rec + v rec
21 Derivaion of Curren-Doubler Recifier (3) Two recifiers share he winding and filer capacior. o half Vsec_ m V = D
22 Operaion Principle of Curren-Doubler Recifier (1) D R2 1 i o 1 1 i o 2 /2 2 D R T s /2 T s 22
23 Operaion Principle of Curren-Doubler Recifier (2) D R2 1 i o 1 1 i o 2 /2 2 D R T s /2 T s 23
24 Operaion Principle of Curren-Doubler Recifier (3) D R2 1 i o 1 1 i o 2 /2 2 D R T s /2 T s 24
25 Operaion Principle of Curren-Doubler Recifier (4) D R2 1 i o 1 1 i o 2 /2 2 D R T s /2 T s 25
26 Relaionships of Curren-Doubler Recifier D R2 1 + _ i o 1 2 /2 2 V V V D R1 o sec_ m = D half = V = V DR1 DR2 sec_ m I 26 DR1 = IDR2 = I T s /2 T s o 2
27 DCM of Curren-Doubler Recifier (1) D R2 1 i o 1 1 /2 2 D R1 2 Inducor curren can flow in he negaive direcion T s /2 T s 27
28 DCM of Curren-Doubler Recifier (2) D R2 1 i o 1 2 D R T s /2 T s 28
29 DCM of Curren-Doubler Recifier (2) D R2 1 2 D R1 Inducor curren can flow in he negaive direcion T s /2 T s
30 Comparison of Reecifiers (1) Design a DC/DC converer Inpu Volage: V in Oupu Volage: Oupu Curren: Given he duy cycle of all he swiches be
31 Comparison of Reecifiers (2) Recifier Topology Winding Raio Curren Sress Volage Sress No. of Diodes Toal Power of Diodes Applicaions Full- Wave D R1 + v rec _ + _ K 2V in /K 2 4V in Low oupu volage D R2 Full- Bridge K V in /K 4 4V in High oupu volage CDR D R V in /K 2 4V in D R _ K /2 Low oupu volage, high cureen
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