graph LR
subgraph "三相逆变桥拓扑"
A["高压直流母线 \n 400-800VDC"] --> B["上桥臂U相"]
A --> C["上桥臂V相"]
A --> D["上桥臂W相"]
subgraph B ["U相桥臂"]
direction TB
Q_UH["VBP112MC60 \n SiC MOSFET"]
Q_UL["VBP112MC60 \n SiC MOSFET"]
end
subgraph C ["V相桥臂"]
direction TB
Q_VH["VBP112MC60 \n SiC MOSFET"]
Q_VL["VBP112MC60 \n SiC MOSFET"]
end
subgraph D ["W相桥臂"]
direction TB
Q_WH["VBP112MC60 \n SiC MOSFET"]
Q_WL["VBP112MC60 \n SiC MOSFET"]
end
B --> E["U相输出"]
C --> F["V相输出"]
D --> G["W相输出"]
E --> H["PMSM电机"]
F --> H
G --> H
Q_UL --> I["直流母线负极"]
Q_VL --> I
Q_WL --> I
end
subgraph "SiC栅极驱动电路"
J["SiC专用驱动器"] --> K["+18V/-3V驱动"]
K --> Q_UH
K --> Q_UL
K --> Q_VH
K --> Q_VL
K --> Q_WH
K --> Q_WL
L["隔离电源"] --> J
M["故障反馈"] --> J
J --> N["保护信号"]
end
subgraph "保护与缓冲"
O["RC吸收网络"] --> Q_UH
O --> Q_VH
O --> Q_WH
P["TVS保护"] --> J
Q["电流检测"] --> R["比较器"]
R --> S["过流保护"]
S --> T["故障锁存"]
T --> N
end
style Q_UH fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style Q_VH fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style Q_WH fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
辅助电源与预充电拓扑详图
graph TB
subgraph "高压预充电电路"
A["高压电池"] --> B["主接触器"]
B --> C["预充电电阻"]
C --> D["VBL155R24 \n 预充电MOSFET"]
D --> E["直流母线电容"]
F["预充电控制器"] --> G["栅极驱动"]
G --> D
H["电压检测"] --> I["比较器"]
I --> J["充电完成信号"]
J --> F
E --> K["主逆变桥"]
end
subgraph "隔离DC-DC辅助电源"
E --> L["VBL155R24 \n 主开关管"]
L --> M["变压器初级"]
M --> N["谐振网络"]
N --> O["初级地"]
P["PWM控制器"] --> Q["隔离驱动"]
Q --> L
M --> R["变压器次级"]
R --> S["同步整流"]
S --> T["输出滤波"]
T --> U["12V输出"]
T --> V["5V输出"]
T --> W["3.3V输出"]
X["反馈隔离"] --> P
end
subgraph "低压负载管理"
U --> Y["VBFB2317 \n 风扇控制"]
U --> Z["VBFB2317 \n 泵控制"]
AA["MCU控制"] --> AB["电平转换"]
AB --> Y
AB --> Z
Y --> AC["冷却风扇"]
Z --> AD["冷却液泵"]
AC --> AE["系统地"]
AD --> AE
end
style D fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style L fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style Y fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
保护电路与热管理拓扑详图
graph LR
subgraph "多级热管理系统"
A["一级热管理"] --> B["SiC MOSFET液冷板"]
C["二级热管理"] --> D["辅助MOSFET散热器"]
E["三级热管理"] --> F["控制芯片自然冷却"]
G["温度传感器1"] --> H["SiC结温监测"]
I["温度传感器2"] --> J["散热器温度"]
K["温度传感器3"] --> L["环境温度"]
H --> M["热管理算法"]
J --> M
L --> M
M --> N["MCU"]
N --> O["风扇PWM控制"]
N --> P["泵速控制"]
O --> Q["冷却风扇"]
P --> R["液冷泵"]
end
subgraph "综合保护网络"
S["电流检测电路"] --> T["过流比较器"]
U["电压检测电路"] --> V["过压比较器"]
W["温度检测电路"] --> X["过温比较器"]
T --> Y["或逻辑"]
V --> Y
X --> Y
Y --> Z["故障锁存器"]
Z --> AA["全局关断信号"]
AA --> AB["栅极驱动禁用"]
AA --> AC["接触器控制"]
AA --> AD["安全路径MOSFET"]
AD["VBFB2317安全开关"] --> AE["系统断电"]
end
subgraph "EMC与可靠性设计"
AF["RC吸收网络"] --> AG["主开关管"]
AH["TVS阵列"] --> AI["栅极驱动器"]
AJ["共模电感"] --> AK["电源输入"]
AL["屏蔽层"] --> AM["敏感信号"]
AN["接地设计"] --> AO["低阻抗回路"]
end
style B fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style D fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style AD fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
点击下载：VBFB2317规格书
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