graph LR
subgraph "PFC升压级"
A["交流输入"] --> B["EMI滤波器"]
B --> C["整流桥"]
C --> D["PFC电感"]
D --> E["PFC开关节点"]
E --> F["VBL16R34SFD \n 600V/34A"]
F --> G["高压母线 \n 400-800VDC"]
H["PFC控制器"] --> I["栅极驱动器"]
I --> F
G -->|电压反馈| H
end
subgraph "全桥逆变级"
G --> J["直流母线电容"]
J --> K["全桥逆变节点"]
K --> L["VBL16R34SFD \n 左上半桥"]
L --> M["高频变压器初级"]
K --> N["VBL16R34SFD \n 左下半桥"]
N --> O["初级地"]
P["VBL16R34SFD \n 右上半桥"] --> M
Q["VBL16R34SFD \n 右下半桥"] --> O
M --> R["高频变压器"]
R --> S["高压次级绕组"]
S --> T["高压整流"]
T --> U["X射线管阳极 \n 20-150kV"]
V["逆变控制器"] --> W["隔离驱动器"]
W --> L
W --> N
W --> P
W --> Q
end
subgraph "驱动与保护"
X["PFC驱动"] --> F
Y["逆变驱动"] --> L
Z["吸收电路"] --> K
AA["TVS保护"] --> W
BB["电流检测"] --> V
CC["电压检测"] --> V
end
style F fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style L fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
辅助电源与灯丝控制拓扑详图
graph TB
subgraph "辅助电源反激拓扑"
A["辅助输入 \n 24V/48V"] --> B["输入滤波"]
B --> C["反激变压器初级"]
C --> D["开关节点"]
D --> E["VBE1695 \n 60V/18A"]
E --> F["初级地"]
G["PWM控制器"] --> H["驱动电路"]
H --> E
C --> I["反激变压器"]
I --> J["次级绕组1"]
J --> K["整流滤波"]
K --> L["+5V控制电源"]
I --> M["次级绕组2"]
M --> N["整流滤波"]
N --> O["+12V驱动电源"]
L --> P["MCU及外围"]
O --> Q["栅极驱动器"]
end
subgraph "灯丝加热控制"
R["MCU PWM"] --> S["电平转换"]
S --> T["VBE1695 \n 灯丝开关"]
U["灯丝电源"] --> T
T --> V["X射线管灯丝 \n 6-12V/2-10A"]
V --> W["灯丝电流检测"]
W --> X["电流反馈"]
X --> R
subgraph "灯丝保护"
Y["过流保护"]
Z["开路检测"]
AA["温度监控"]
end
Y --> R
Z --> R
AA --> R
end
subgraph "散热设计"
BB["TO-252封装"] --> CC["PCB敷铜散热"]
CC --> DD["≥100mm²铜箔"]
EE["连续工作"] --> FF["附加散热片"]
end
style E fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style T fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
保护与切换电路拓扑详图
graph LR
subgraph "高压保护开关"
A["保护控制信号"] --> B["电平转换"]
B --> C["VBR9N2001K \n 200V/0.6A"]
D["高压侧电源"] --> C
C --> E["负载电路"]
E --> F["地"]
subgraph "保护功能"
G["软启动控制"]
H["快速关断"]
I["隔离切换"]
end
G --> C
H --> C
I --> C
end
subgraph "故障检测网络"
J["过压检测电路"] --> K["比较器"]
L["过流检测电路"] --> M["比较器"]
N["温度传感器"] --> O["ADC"]
P["电弧检测器"] --> Q["比较器"]
K --> R["故障逻辑"]
M --> R
O --> R
Q --> R
R --> S["故障锁存"]
S --> T["关断信号"]
T --> A
end
subgraph "安全互锁"
U["门开关检测"] --> V["安全逻辑"]
W["水冷流量检测"] --> V
X["高压互锁"] --> V
V --> Y["使能信号"]
Y --> A
end
subgraph "EMC抑制措施"
Z["RC吸收网络"] --> CC["开关节点"]
AA["TVS阵列"] --> BB["敏感电路"]
DD["屏蔽设计"] --> EE["高频变压器"]
FF["滤波电容"] --> GG["电源入口"]
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
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