graph LR
subgraph "高压固态继电器架构"
A["三相整流输出 \n ~540VDC"] --> B["SSR输入端子"]
B --> C["高压MOSFET阵列"]
subgraph C ["双管串联结构"]
direction TB
Q1["VBM18R06S \n 800V/6A"]
Q2["VBM18R06S \n 800V/6A"]
end
C --> D["SSR输出端子"]
D --> E["主加热器负载 \n (阻性/感性)"]
end
subgraph "隔离驱动电路"
F["PWM控制信号"] --> G["光耦隔离器"]
H["隔离电源 \n DC-DC"] --> I["驱动IC"]
G --> I
I --> J["栅极驱动电阻"]
J --> Q1
J --> Q2
end
subgraph "保护与缓冲"
K["RCD缓冲网络"] --> Q1
L["RC吸收电路"] --> Q2
M["TVS管阵列"] --> B
N["快速熔断器"] --> A
end
subgraph "温度监控"
O["绝缘导热垫"] --> Q1
P["散热器"] --> O
Q["NTC温度传感器"] --> R["温度监测IC"]
R --> S["过温保护"]
end
style Q1 fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
循环风机三相驱动拓扑详图
graph TB
subgraph "三相逆变桥拓扑"
A["直流母线 \n 540VDC"] --> B["DC-LINK电容"]
B --> C["三相逆变桥"]
subgraph C ["六管三相桥"]
direction LR
U_H["VBMB1104NA \n 上管U"]
U_L["VBMB1104NA \n 下管U"]
V_H["VBMB1104NA \n 上管V"]
V_L["VBMB1104NA \n 下管V"]
W_H["VBMB1104NA \n 上管W"]
W_L["VBMB1104NA \n 下管W"]
end
U_H --> D["U相输出"]
U_L --> D
V_H --> E["V相输出"]
V_L --> E
W_H --> F["W相输出"]
W_L --> F
U_L --> G["功率地"]
V_L --> G
W_L --> G
D --> H["三相循环风机"]
E --> H
F --> H
end
subgraph "三相驱动控制"
I["MCU PWM输出"] --> J["三相预驱IC"]
J --> K["上管驱动电路"]
J --> L["下管驱动电路"]
K --> U_H
K --> V_H
K --> W_H
L --> U_L
L --> V_L
L --> W_L
end
subgraph "电流检测与保护"
M["U相电流传感器"] --> N["电流检测IC"]
O["V相电流传感器"] --> N
P["W相电流传感器"] --> N
N --> Q["过流比较器"]
Q --> R["故障封锁"]
R --> J
end
subgraph "热管理设计"
S["TO-220F封装"] --> U_H
T["铝基板散热器"] --> S
U["强制风冷风扇"] --> T
V["NTC温度监测"] --> W["风扇控制"]
W --> U
end
style U_H fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
辅助电源与阀门控制拓扑详图
graph LR
subgraph "高效率DC-DC辅助电源"
A["12V输入电源"] --> B["输入滤波"]
B --> C["同步降压控制器"]
subgraph "同步整流功率级"
D["VBGQA1303 \n 高侧开关"]
E["VBGQA1303 \n 低侧开关"]
end
C --> F["高侧驱动器"]
C --> G["低侧驱动器"]
F --> D
G --> E
D --> H["输出电感"]
E --> H
H --> I["输出电容"]
I --> J["5V系统电源"]
end
subgraph "比例阀精密驱动"
K["AI控制信号"] --> L["PID控制器"]
L --> M["PWM调制器"]
M --> N["阀门驱动IC"]
subgraph "H桥驱动电路"
O["VBGQA1303 \n 左高侧"]
P["VBGQA1303 \n 左低侧"]
Q["VBGQA1303 \n 右高侧"]
R["VBGQA1303 \n 右低侧"]
end
N --> O
N --> P
N --> Q
N --> R
O --> S["比例阀线圈+"]
P --> T["比例阀线圈-"]
Q --> S
R --> T
end
subgraph "PCB散热设计"
U["DFN8(5×6)封装"] --> VBGQA1303
V["2oz厚铜PCB"] --> U
W["散热过孔阵列"] --> V
X["散热焊盘"] --> U
end
subgraph "电流精密检测"
Y["高侧电流检测"] --> Z["差分放大器"]
AA["低侧电流检测"] --> Z
Z --> BB["ADC输入"]
BB --> MCU["MCU"]
end
style VBGQA1303 fill:#fff3e0,stroke:#ff9800,stroke-width:2px
点击下载：VBMB1104NA规格书
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