graph LR
subgraph "三相逆变桥下管配置"
A["直流母线+"] --> B["母线电容"]
B --> C["U相下管 \n VBQF1302"]
B --> D["V相下管 \n VBQF1302"]
B --> E["W相下管 \n VBQF1302"]
C --> F["U相输出"]
D --> G["V相输出"]
E --> H["W相输出"]
F --> I["伺服电机U相"]
G --> J["伺服电机V相"]
H --> K["伺服电机W相"]
end
subgraph "同步整流续流路径"
L["U相输出"] --> M["U相续流管 \n VBQF1302"]
N["V相输出"] --> O["V相续流管 \n VBQF1302"]
P["W相输出"] --> Q["W相续流管 \n VBQF1302"]
M --> R["功率地"]
O --> R
Q --> R
end
subgraph "栅极驱动与保护"
S["PWM控制器"] --> T["死区插入"]
T --> U["U相驱动器"]
T --> V["V相驱动器"]
T --> W["W相驱动器"]
U --> C
V --> D
W --> E
U --> M
V --> O
W --> Q
X["电流检测"] --> Y["过流保护"]
Z["电压检测"] --> AA["过压保护"]
Y --> AB["故障锁存"]
AA --> AB
AB --> AC["驱动关断"]
AC --> U
AC --> V
AC --> W
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style M fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
信号电平转换与隔离接口拓扑
graph TB
subgraph "电平转换电路"
A["MCU GPIO \n 3.3V/5V"] --> B["VBK5213N \n N+P MOSFET"]
B --> C["栅极驱动器输入 \n 12V/15V"]
D["上拉电阻"] --> C
E["电源12V"] --> D
F["MCU PWM1"] --> G["VBK5213N \n 通道1"]
F --> H["VBK5213N \n 通道2"]
G --> I["驱动器使能1"]
H --> J["驱动器使能2"]
end
subgraph "隔离电源原边控制"
K["MCU控制信号"] --> L["VBK5213N开关"]
M["直流输入12V"] --> N["原边开关节点"]
L --> N
N --> O["隔离变压器原边"]
P["RCD吸收电路"] --> N
Q["PWM控制器"] --> L
end
subgraph "信号隔离应用"
R["隔离变压器副边"] --> S["整流滤波"]
S --> T["隔离电源输出 \n +15V/-5V"]
T --> U["栅极驱动器供电"]
V["数字隔离器"] --> W["故障反馈信号"]
W --> X["MCU故障输入"]
end
style B fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style L fill:#fff3e0,stroke:#ff9800,stroke-width:2px
辅助电源与保护开关拓扑
graph LR
subgraph "Buck辅助电源拓扑"
A["直流输入 \n 24V/48V"] --> B["输入电容"]
B --> C["VBI1638主开关"]
C --> D["储能电感"]
D --> E["输出电容"]
E --> F["辅助电源输出 \n 12V/5V/3.3V"]
G["续流二极管"] --> D
H["PWM控制器"] --> I["栅极驱动"]
I --> C
J["电压反馈"] --> H
K["电流检测"] --> H
F --> L["控制电路"]
F --> M["风扇"]
F --> N["通信模块"]
end
subgraph "预充电控制电路"
O["直流电源"] --> P["VBI1638预充电开关"]
P --> Q["限流电阻"]
Q --> R["直流母线电容"]
S["MCU控制"] --> P
T["电流检测"] --> U["软启动控制"]
U --> S
end
subgraph "放电与制动电路"
R --> V["VBI1638放电开关"]
V --> W["制动电阻"]
X["过压检测"] --> Y["放电控制"]
Y --> V
Z["紧急停止"] --> Y
end
subgraph "保护网络"
AA["TVS管"] --> B
AB["RC吸收"] --> C
AC["栅极稳压管"] --> I
AD["温度传感器"] --> AE["热保护"]
AE --> H
AE --> Y
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style P fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style V fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
点击下载：VBQF1302规格书
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