graph LR
subgraph "主加热回路"
A["直流母线310V"] --> B["VBGQF1402 \n 主开关管"]
B --> C["主加热管 \n 1000-2000W"]
C --> D[功率地]
E["MCU PWM输出"] --> F["栅极驱动器 \n 1A驱动能力"]
F --> G["驱动信号"]
G --> B
end
subgraph "高精度温控系统"
H["温度传感器"] --> I["MCU ADC输入"]
I --> J["PID温度控制算法"]
J --> K["PWM占空比调节"]
K --> E
end
subgraph "多重保护电路"
L["电流采样电阻"] --> M["差分放大器"]
M --> N["比较器"]
N --> O["故障锁存"]
O --> P["关断信号"]
P --> F
Q["栅极串联电阻"] --> B
R["18V齐纳管"] --> S["栅极保护"]
S --> B
T["RC缓冲网络"] --> U["关断尖峰抑制"]
U --> B
end
subgraph "热设计"
V["PCB大面积敷铜"] --> B
W["热过孔阵列"] --> X["背面铜层"]
X --> Y["辅助散热"]
Z["温度监控点"] --> H
end
style B fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
风机驱动拓扑详图
graph TB
subgraph "BLDC三相逆变桥"
A["24V/12V供电"] --> B["上桥臂MOSFET"]
subgraph "下桥臂阵列"
C["VBQF1302 \n U相下桥"]
D["VBQF1302 \n V相下桥"]
E["VBQF1302 \n W相下桥"]
end
B --> F["U相输出"]
B --> G["V相输出"]
B --> H["W相输出"]
C --> F
D --> G
E --> H
F --> I["BLDC电机"]
G --> I
H --> I
I --> J[电机地]
end
subgraph "驱动与控制"
K["MCU"] --> L["BLDC控制器"]
L --> M["三相预驱动器"]
M --> N["U相驱动"]
M --> O["V相驱动"]
M --> P["W相驱动"]
N --> C
O --> D
P --> E
Q["霍尔传感器"] --> R["位置检测"]
R --> L
end
subgraph "无级调速与保护"
S["MCU PWM"] --> T["转速控制算法"]
T --> L
U["电流检测"] --> V["过流保护"]
V --> W["故障关断"]
W --> M
X["反电动势检测"] --> Y["无传感器控制"]
Y --> L
end
subgraph "EMC与热设计"
Z["RC吸收电路"] --> F
AA["低ESL电容"] --> A
BB["紧凑布局设计"] --> CC["最小环路面积"]
DD["多层板内层铺铜"] --> C
DD --> D
DD --> E
EE["热过孔"] --> FF["背面散热"]
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style D fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style E fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
辅助功能与智能管理拓扑详图
graph LR
subgraph "双路智能开关"
A["MCU GPIO"] --> B["电平转换电路"]
B --> C["VBC6N2022 栅极1"]
B --> D["VBC6N2022 栅极2"]
subgraph "VBC6N2022内部结构"
direction LR
E["共漏极端子"]
F["通道1: N-MOS"]
G["通道2: N-MOS"]
H["源极端子1"]
I["源极端子2"]
end
C --> F
D --> G
J["5V辅助电源"] --> E
F --> H
G --> I
H --> K["照明LED负载"]
I --> L["蜂鸣器负载"]
K --> M[地]
L --> M
end
subgraph "高边开关配置"
N["电荷泵电路"] --> O["高边驱动电压"]
O --> C
O --> D
P["自举电路"] --> Q["浮动电源"]
Q --> B
end
subgraph "逻辑控制与联动"
R["开盖检测"] --> S["开盖信号"]
S --> T["LED控制逻辑"]
T --> A
U["烹饪完成"] --> V["完成信号"]
V --> W["蜂鸣器控制逻辑"]
W --> A
X["定时器"] --> Y["时间控制"]
Y --> A
end
subgraph "保护与安全"
Z["保险电阻"] --> K
AA["限流电阻"] --> L
BB["ESD保护"] --> C
BB --> D
CC["去耦电容"] --> J
end
subgraph "扩展功能"
DD["环境光传感器"] --> EE["自动调光"]
EE --> A
FF["直流小风扇"] --> GG["VBC6N2022扩展通道"]
GG --> A
HH["Wi-Fi控制"] --> II["远程开关"]
II --> A
end
style F fill:#fff3e0,stroke:#ff9800,stroke-width:1px
style G fill:#fff3e0,stroke:#ff9800,stroke-width:1px
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