graph LR
subgraph "三相输入与整流"
A[三相380VAC] --> B[EMI滤波器]
B --> C[三相整流桥]
C --> D[直流母线电容]
D --> E[~540VDC母线]
end
subgraph "全桥逆变拓扑"
E --> F[全桥逆变桥臂]
subgraph F [全桥拓扑]
direction LR
H[左上管]
I[右上管]
J[左下管]
K[右下管]
end
H --> L[变压器初级]
I --> L
J --> M[初级地]
K --> M
subgraph "主逆变MOSFET"
N["VBM17R15S \n 700V/15A"]
O["VBM17R15S \n 700V/15A"]
P["VBM17R15S \n 700V/15A"]
Q["VBM17R15S \n 700V/15A"]
end
F --> N
F --> O
F --> P
F --> Q
R[逆变控制器] --> S[栅极驱动器]
S --> N
S --> O
S --> P
S --> Q
end
style N fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
同步整流与输出级拓扑详图
graph TB
subgraph "二次侧同步整流"
A[高频变压器次级] --> B[整流节点]
subgraph "同步整流桥臂"
C["VBGQA1300 \n 30V/280A"]
D["VBGQA1300 \n 30V/280A"]
E["VBGQA1300 \n 30V/280A"]
F["VBGQA1300 \n 30V/280A"]
end
B --> C
B --> D
B --> E
B --> F
C --> G[输出滤波电感]
D --> G
E --> H[输出地]
F --> H
G --> I[输出滤波电容]
I --> J[焊接输出正极]
H --> K[焊接输出负极]
L[同步整流控制器] --> M[高速驱动器]
M --> C
M --> D
M --> E
M --> F
end
subgraph "输出电流检测与控制"
J --> N[霍尔电流传感器]
K --> N
N --> O[ADC采样]
O --> P[DSP电流环]
P --> Q[PWM调制器]
Q --> R[驱动信号]
R --> M
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
热管理与保护电路拓扑详图
graph LR
subgraph "三级散热系统"
A["一级散热: 强制风冷"] --> B["同步整流MOSFET"]
C["二级散热: 强制风冷"] --> D["主逆变MOSFET"]
E["三级散热: 自然冷却"] --> F["控制芯片"]
G[温度传感器阵列] --> H[DSP热管理]
H --> I[风扇PWM控制]
H --> J[功率降额保护]
I --> K[冷却风扇组]
end
subgraph "电气保护网络"
L["RCD缓冲电路"] --> M["逆变MOSFET"]
N["RC吸收电路"] --> M
O["MOV阵列"] --> P["直流母线"]
Q["TVS保护"] --> R["栅极驱动芯片"]
S[电流互感器] --> T[硬件比较器]
T --> U[故障锁存]
U --> V[快速关断]
V --> M
end
subgraph "故障诊断机制"
W[母线电压监测] --> X[缺相检测]
Y[驱动状态监测] --> Z[直通保护]
AA[结温估算] --> AB[过热预警]
AC[波形分析] --> AD[参数自适应]
end
style B fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style D fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style M fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
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