graph LR
subgraph "三相交错式PFC拓扑"
A["L1 380VAC"] --> B1[EMI滤波器]
A2["L2 380VAC"] --> B2[EMI滤波器]
A3["L3 380VAC"] --> B3[EMI滤波器]
B1 --> C1[整流桥臂]
B2 --> C2[整流桥臂]
B3 --> C3[整流桥臂]
C1 --> D1[PFC电感]
C2 --> D2[PFC电感]
C3 --> D3[PFC电感]
D1 --> E1["开关节点1"]
D2 --> E2["开关节点2"]
D3 --> E3["开关节点3"]
subgraph "高压MOSFET阵列"
Q1["VBP18R20SFD \n 800V/20A"]
Q2["VBP18R20SFD \n 800V/20A"]
Q3["VBP18R20SFD \n 800V/20A"]
end
E1 --> Q1
E2 --> Q2
E3 --> Q3
Q1 --> F[直流母线电容]
Q2 --> F
Q3 --> F
F --> G["高压直流母线 \n 700-800VDC"]
end
subgraph "控制与驱动"
H[PFC控制器] --> I[交错控制逻辑]
I --> J[栅极驱动器]
J --> Q1
J --> Q2
J --> Q3
G -->|电压反馈| H
K[电流传感器] -->|电流反馈| H
end
subgraph "保护电路"
L["RCD缓冲电路"] --> Q1
M["RC吸收电路"] --> Q2
N["TVS保护阵列"] --> J
O["浪涌抑制器"] --> A
end
style Q1 fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style G fill:#ffebee,stroke:#f44336,stroke-width:2px
逆变输出级拓扑详图
graph TB
subgraph "三电平T型逆变桥臂(相U)"
A[直流母线正极] --> B["上桥臂开关"]
B --> C["桥臂中点"]
C --> D["下桥臂开关"]
D --> E[直流母线负极]
subgraph "功率器件配置"
Q_UP["VBGQT1601 \n 60V/340A"]
Q_DN["VBGQT1601 \n 60V/340A"]
Q_T1["VBGQT1601 \n 60V/340A"]
Q_T2["VBGQT1601 \n 60V/340A"]
end
B --> Q_UP
C --> Q_T1
C --> Q_T2
D --> Q_DN
Q_UP --> F[输出节点U]
Q_T1 --> F
Q_T2 --> F
Q_DN --> F
end
subgraph "输出滤波与保护"
F --> G["LC滤波器"]
G --> H["三相输出 \n 380VAC/50Hz"]
subgraph "dV/dt滤波器"
I[磁环电感]
J[薄膜电容]
end
H --> I
I --> J
J --> K[负载端子]
end
subgraph "驱动与保护"
L[逆变控制器] --> M[PWM生成]
M --> N[死区补偿]
N --> O[栅极驱动器]
O --> Q_UP
O --> Q_DN
O --> Q_T1
O --> Q_T2
subgraph "电流检测与保护"
P[霍尔电流传感器]
Q[DESAT检测电路]
R[短路保护]
end
P --> L
Q --> R
R --> S[故障关断]
S --> O
end
style Q_UP fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style Q_T1 fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style H fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
热管理与保护拓扑详图
graph LR
subgraph "三级散热系统"
A["一级: 液冷系统"] --> B["液冷板"]
B --> C["逆变MOSFET(TOLL)"]
B --> D["直流母线电容"]
E["二级: 风冷系统"] --> F["铝散热器"]
F --> G["PFC MOSFET(TO-247)"]
F --> H["PFC电感"]
I["三级: PCB导热"] --> J["大面积敷铜"]
J --> K["控制IC(VBA3104N)"]
J --> L["驱动芯片"]
end
subgraph "温度监测网络"
M["PT100传感器1"] --> N[温度采集]
O["NTC传感器2"] --> N
P["红外测温点3"] --> N
N --> Q[MCU]
Q --> R[温度保护逻辑]
R --> S[分级降额控制]
S --> T[风扇调速]
S --> U[泵速调节]
S --> V[功率限制]
end
subgraph "电气保护网络"
W["母线过压保护"] --> X[比较器]
Y["桥臂过流保护"] --> X
Z["器件过温保护"] --> X
X --> AA[故障锁存]
AA --> AB[关断信号]
AB --> G
AB --> C
subgraph "缓冲与吸收"
AC[RCD缓冲] --> G
AD[RC吸收] --> C
AE[TVS阵列] --> L
end
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style G fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style K fill:#fff3e0,stroke:#ff9800,stroke-width:2px
点击下载：VBP18R20SFD规格书
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