graph LR
subgraph "三相逆变桥下桥臂"
A["48V电池输入"] --> B["直流母线电容"]
B --> C["U相下桥"]
B --> D["V相下桥"]
B --> E["W相下桥"]
C --> F["VBGM1803 \n 80V/180A"]
D --> G["VBGM1803 \n 80V/180A"]
E --> H["VBGM1803 \n 80V/180A"]
F --> I["电机U相"]
G --> J["电机V相"]
H --> K["电机W相"]
I --> L[电机中性点]
J --> L
K --> L
end
subgraph "驱动与控制"
M["电机控制器"] --> N["预驱动芯片"]
N --> O["栅极驱动电阻"]
O --> F
O --> G
O --> H
P["电流检测"] --> Q["电流采样"]
Q --> M
R["霍尔传感器"] --> M
end
subgraph "保护电路"
S["TVS管"] --> F
T["栅极电阻"] --> F
U["退耦电容"] --> N
V["过流比较器"] --> W["故障锁存"]
W --> X["关断信号"]
X --> N
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style G fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style H fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
中央电源转换拓扑详图
graph TB
subgraph "高压DC-DC变换器"
A["高压输入 \n 300-400VDC"] --> B["输入滤波电容"]
B --> C["全桥开关网络"]
subgraph "开关管阵列"
Q1["VBPB165I60 \n 600V/60A"]
Q2["VBPB165I60 \n 600V/60A"]
Q3["VBPB165I60 \n 600V/60A"]
Q4["VBPB165I60 \n 600V/60A"]
end
C --> Q1
C --> Q2
C --> Q3
C --> Q4
Q1 --> D["变压器初级"]
Q2 --> D
Q3 --> D
Q4 --> D
D --> E["高频变压器"]
E --> F["次级整流"]
F --> G["输出滤波"]
G --> H["低压输出 \n 48V/24V"]
end
subgraph "控制与驱动"
I["PWM控制器"] --> J["隔离驱动"]
J --> K["栅极驱动电路"]
K --> Q1
K --> Q2
K --> Q3
K --> Q4
L["电压反馈"] --> I
M["电流检测"] --> I
end
subgraph "缓冲与保护"
N["RCD缓冲电路"] --> Q1
O["RC吸收电路"] --> Q2
P["TVS保护"] --> J
Q["过流保护"] --> R["关断逻辑"]
R --> I
end
style Q1 fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style Q2 fill:#fff3e0,stroke:#ff9800,stroke-width:2px
辅助与接口电路拓扑详图
graph LR
subgraph "双路负载开关配置"
A["MCU GPIO \n 3.3V"] --> B["电平匹配"]
B --> C["VB3222A 通道1"]
B --> D["VB3222A 通道2"]
E["12V辅助电源"] --> C
E --> D
C --> F["负载1 \n 传感器/灯光"]
D --> G["负载2 \n 风扇/通信"]
F --> H[GND]
G --> H
end
subgraph "小功率电机驱动"
I["MCU PWM"] --> J["H桥驱动逻辑"]
J --> K["VB3222A Q1"]
J --> L["VB3222A Q2"]
J --> M["VB3222A Q3"]
J --> N["VB3222A Q4"]
O["电机电源"] --> K
O --> M
K --> P["电机正端"]
L --> Q["电机负端"]
M --> Q
N --> P
P --> R["有刷直流电机"]
Q --> R
end
subgraph "接口保护"
S["TVS阵列"] --> C
S --> D
T["串联电阻"] --> B
U["滤波电容"] --> E
V["ESD保护"] --> A
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style D fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
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