graph LR
subgraph "加热器功率链路"
A["24V/48V直流输入"] --> B["输入滤波电容"]
B --> C["主保险丝"]
C --> D["加热驱动节点"]
subgraph "并联MOSFET阵列"
Q1["VBQF2305 \n -30V/-52A"]
Q2["VBQF2305 \n -30V/-52A"]
Q3["VBQF2305 \n -30V/-52A"]
end
D --> Q1
D --> Q2
D --> Q3
Q1 --> E["加热元件"]
Q2 --> E
Q3 --> E
E --> F["电流采样电阻"]
F --> G["功率地"]
H["MCU PWM"] --> I["栅极驱动器"]
I --> J["驱动信号"]
J --> Q1
J --> Q2
J --> Q3
F -->|电流反馈| H
end
subgraph "热设计与保护"
K["PCB大面积敷铜"] --> Q1
K --> Q2
K --> Q3
L["散热过孔阵列"] --> K
M["导热硅胶"] --> N["金属机壳"]
O["NTC传感器"] --> P["温度检测"]
P --> H
end
style Q1 fill:#ffebee,stroke:#f44336,stroke-width:2px
style E fill:#ffcdd2,stroke:#e53935,stroke-width:2px
泵阀驱动拓扑详图
graph TB
subgraph "泵驱动通道"
A["直流母线"] --> B["泵驱动节点"]
B --> C["VBGQF1610 \n 60V/35A"]
C --> D["烟雾泵线圈"]
D --> E["续流二极管"]
E --> F["电源正极"]
D --> G["电流检测"]
G --> H["功率地"]
I["MCU控制"] --> J["高速栅极驱动"]
J --> K["驱动信号"]
K --> C
G -->|泵电流反馈| I
end
subgraph "阀驱动通道"
L["直流母线"] --> M["阀驱动节点"]
M --> N["VBGQF1610 \n 60V/35A"]
N --> O["电磁阀线圈"]
O --> P["RC缓冲网络"]
P --> Q["电源正极"]
O --> R["电流检测"]
R --> S["功率地"]
T["MCU控制"] --> U["高速栅极驱动"]
U --> V["驱动信号"]
V --> N
R -->|阀电流反馈| T
end
subgraph "保护电路"
W["TVS管阵列"] --> X["驱动芯片保护"]
Y["肖特基二极管"] --> Z["反峰电压钳位"]
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style N fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style D fill:#bbdefb,stroke:#1e88e5,stroke-width:2px
辅助控制与安全拓扑详图
graph LR
subgraph "智能负载开关控制"
subgraph "VB3420双通道控制"
direction TB
CH1["通道1: 风扇控制"]
CH2["通道2: 指示灯"]
end
A["MCU GPIO1"] --> B["电平转换"]
B --> CH1
C["MCU GPIO2"] --> D["电平转换"]
D --> CH2
E["12V辅助电源"] --> F["VB3420 VCC"]
CH1 --> G["冷却风扇"]
CH2 --> H["状态指示灯"]
G --> I["地"]
H --> I
subgraph "安全互锁通道"
J["MCU GPIO3"] --> K["电平转换"]
K --> L["VB3420通道3"]
M["12V辅助电源"] --> L
L --> N["安全互锁回路"]
N --> O["机盖开关"]
O --> P["地"]
end
end
subgraph "系统监测与反馈"
Q["加热器电流采样"] --> R["ADC输入"]
S["泵电流采样"] --> R
T["阀门电流采样"] --> R
U["NTC温度传感器"] --> V["温度检测"]
W["电压检测点"] --> X["电压监控"]
R --> Y["MCU"]
V --> Y
X --> Y
end
subgraph "故障诊断"
Z["过流比较器"] --> AA["故障锁存"]
BB["过温比较器"] --> AA
CC["电压异常检测"] --> AA
AA --> DD["全局关断信号"]
DD --> EE["驱动禁用"]
end
style CH1 fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style L fill:#fff3e0,stroke:#ff9800,stroke-width:2px
点击下载：VBQF2317规格书
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