graph LR
subgraph "三相PFC升压电路"
A[三相380VAC] --> B["EMI滤波器 \n π型/共模"]
B --> C["三相整流桥"]
C --> D["PFC电感"]
D --> E["PFC开关节点"]
E --> F["VBP113MI25B \n 1350V/25A \n TO-247"]
F --> G["高压直流母线 \n ~700VDC"]
H["PFC控制器"] --> I["隔离驱动IC \n ISO5852S"]
I --> F
G -->|电压反馈| H
end
subgraph "驱动与保护细节"
I --> J["驱动电阻2-10Ω"]
J --> K["快恢复二极管"]
L["源极磁珠"] --> F
M["RC吸收网络 \n 1nF+10Ω"] --> F
N["散热设计"] --> F
N --> O["大型散热器"]
O --> P["导热硅脂<0.3℃/W"]
end
subgraph "输入防护"
Q["压敏电阻"] --> B
R["气体放电管"] --> B
S["共模电感"] --> B
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style I fill:#fce4ec,stroke:#e91e63,stroke-width:2px
DC-DC主变换电路拓扑详图
graph TB
subgraph "LLC谐振变换器初级"
A["高压直流母线"] --> B["LLC谐振腔 \n Lr+Lm+Cr"]
B --> C["高频变压器初级"]
C --> D["LLC开关节点"]
D --> E["VBMB18R09SE \n 800V/9A \n TO-220F"]
E --> F["初级地"]
G["LLC控制器 \n UCC25640x"] --> H["栅极驱动器"]
H --> E
C -->|电流反馈| G
end
subgraph "次级与输出"
TRANS_SEC["高频变压器次级"] --> I["同步整流"]
I --> J["输出滤波电感"]
J --> K["输出滤波电容"]
K --> L["直流输出 \n 200-750VDC"]
end
subgraph "热管理与布局"
M["散热设计"] --> E
M --> N["独立散热片"]
M --> O["PCB敷铜≥300mm²"]
O --> P["散热过孔阵列"]
Q["变压器屏蔽层"] --> C
R["静电屏蔽"] --> D
end
subgraph "驱动优化"
H --> S["优化驱动电阻"]
S --> T["死区时间调整"]
U["软开关控制"] --> G
end
style E fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style G fill:#fce4ec,stroke:#e91e63,stroke-width:2px
辅助电源与输出控制拓扑详图
graph LR
subgraph "辅助电源反激电路"
A["辅助输入"] --> B["反激变压器"]
B --> C["VBMB1252M \n 250V/16A \n TO-220F"]
C --> D["辅助地"]
E["反激控制器"] --> F["栅极驱动器 \n TC4427"]
F --> C
G["续流二极管"] --> C
B --> H["辅助输出 \n 12V/24V"]
end
subgraph "输出控制通道"
H --> I["MCU控制"]
subgraph "预充控制"
I --> J["预充接触器驱动"]
J --> K["VBMB1252M"]
K --> L["预充电阻"]
end
subgraph "泄放控制"
I --> M["泄放电路驱动"]
M --> N["VBMB1252M"]
N --> O["泄放电阻"]
end
subgraph "使能控制"
I --> P["使能信号驱动"]
P --> Q["VBMB1252M"]
Q --> R["主接触器"]
end
end
subgraph "驱动与保护"
F --> S["栅极电阻47-100Ω"]
S --> T["退耦电容"]
U["TVS保护 \n SMBJ15CA"] --> F
V["并联FRD"] --> K
V --> N
V --> Q
end
subgraph "热设计"
W["散热设计"] --> K
W --> N
W --> Q
W --> X["PCB敷铜≥100mm²"]
Y["多路并联散热"] --> K
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style K fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style N fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style Q fill:#fff3e0,stroke:#ff9800,stroke-width:2px
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