graph LR
subgraph "输入滤波与保护"
A[三相400VAC输入] --> B[MOV浪涌保护器]
B --> C[差模滤波器]
C --> D[共模滤波器]
D --> E[三相整流桥]
end
subgraph "PFC升压级"
E --> F[PFC电感]
F --> G[PFC开关节点]
G --> H["VBL18R18S \n 高压MOSFET"]
H --> I[高压直流母线]
I --> J[直流链路电容]
subgraph "PFC控制回路"
K[PFC控制器] --> L[栅极驱动器]
L --> H
M[电压反馈] --> K
N[电流采样] --> K
end
end
subgraph "电网交互性能"
O["电网适应性 \n 230VAC±20%"] --> P["THD优化 \n <5%"]
Q["效率目标 \n >98.5%"] --> R["功率因数 \n >0.99"]
end
style H fill:#fff3e0,stroke:#ff9800,stroke-width:2px
压缩机驱动拓扑详图
graph TB
subgraph "三相全桥逆变器"
A[直流母线] --> B[上桥臂U相]
A --> C[上桥臂V相]
A --> D[上桥臂W相]
subgraph "U相桥臂"
E["VBGQA1103 \n 上管"]
F["VBGQA1103 \n 下管"]
end
subgraph "V相桥臂"
G["VBGQA1103 \n 上管"]
H["VBGQA1103 \n 下管"]
end
subgraph "W相桥臂"
I["VBGQA1103 \n 上管"]
J["VBGQA1103 \n 下管"]
end
B --> E
C --> G
D --> I
E --> K[U相输出]
F --> K
G --> L[V相输出]
H --> L
I --> M[W相输出]
J --> M
K --> N[压缩机电机]
L --> N
M --> N
F --> O[逆变器地]
H --> O
J --> O
end
subgraph "驱动与控制"
P[DSP控制器] --> Q[FOC算法]
Q --> R[三相PWM生成]
R --> S[栅极驱动器]
S --> E
S --> F
S --> G
S --> H
S --> I
S --> J
subgraph "保护与反馈"
T[电流采样] --> U[过流保护]
V[温度监测] --> W[过温保护]
X[位置传感] --> Y[缺相保护]
end
T --> P
V --> P
X --> P
end
subgraph "效率优化"
Z["极低Rds(on) \n 3.45mΩ"] --> AA["导通损耗降低 \n 31%"]
AB["SGT技术"] --> AC["开关损耗优化"]
AD["并联均流"] --> AE["功率扩展能力"]
end
style E fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
负载管理与热控制拓扑详图
graph LR
subgraph "智能负载开关网络"
A[MCU GPIO] --> B[电平转换电路]
B --> C["VBA2307B \n 风机控制"]
B --> D["VBA2307B \n 阀门控制"]
B --> E["VBA2307B \n 加热控制"]
B --> F["VBA2307B \n 其他负载"]
C --> G[冷凝风机]
D --> H[膨胀阀]
E --> I[除霜加热器]
F --> J[照明/报警等]
subgraph "控制逻辑"
K[温差传感器] --> L[风机PWM控制]
M[温度波动] --> N[阀门通断控制]
O[除霜定时] --> P[加热器控制]
Q[低负载时段] --> R[节能模式]
end
K --> MCU
M --> MCU
O --> MCU
Q --> MCU
MCU --> B
end
subgraph "热管理架构"
subgraph "一级: 主动导热"
S[制冷回气管路] --> T[绝缘导热垫]
T --> U[压缩机MOSFET]
end
subgraph "二级: 强制风冷"
V[独立风道] --> W[散热器]
W --> X[PFC MOSFET]
end
subgraph "三级: 自然散热"
Y[PCB敷铜层] --> Z[负载开关IC]
end
AA[温度传感器网络] --> AB[MCU热管理]
AB --> AC[风扇调速]
AB --> AD[负载调节]
end
subgraph "电磁兼容设计"
AE[RC吸收电路] --> AF[电机端子]
AG[屏蔽电缆] --> AH[功率线路]
AI[磁环抑制] --> AJ[长线反射]
AK[变开关频率] --> AL[噪声分散]
end
style C fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
style U fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
三级热管理与保护拓扑详图
graph TB
subgraph "三级热管理结构"
A["一级: 制冷回气管路导热"] --> B["目标温升<30℃"]
C["二级: 强制风冷散热"] --> D["目标温升<50℃"]
E["三级: PCB敷铜自然散热"] --> F["目标温升<20℃"]
subgraph "热管理执行"
G[压缩机MOSFET] --> H[铝基板+导热垫]
I[PFC MOSFET] --> J[散热器+风道]
K[负载开关IC] --> L[PCB大面积敷铜]
end
H --> A
J --> C
L --> E
end
subgraph "温度监测网络"
subgraph "关键点传感"
M["NTC1: 压缩机散热"]
N["NTC2: PFC散热器"]
O["NTC3: 冷凝器温度"]
P["NTC4: 环境温度"]
end
M --> Q[MCU温度采集]
N --> Q
O --> Q
P --> Q
Q --> R[热管理算法]
R --> S[风扇PWM控制]
R --> T[负载降额策略]
R --> U[故障保护]
end
subgraph "电气保护网络"
subgraph "缓冲与吸收"
V[RCD缓冲] --> W[PFC开关管]
X[RC吸收] --> Y[压缩机桥臂]
Z[续流二极管] --> AA[感性负载]
end
subgraph "故障诊断"
BB[电流采样] --> CC[过流保护]
DD[电压监测] --> EE[过压/欠压]
FF[逻辑检测] --> GG[缺相保护]
HH[状态反馈] --> II[堵转检测]
end
CC --> JJ[故障锁存]
EE --> JJ
GG --> JJ
II --> JJ
JJ --> KK[系统关断]
end
subgraph "环境适应性设计"
LL["低温启动 \n -10℃验证"] --> MM["防凝露设计"]
NN["高温高湿 \n 40℃/90%RH"] --> OO["绝缘防护"]
PP["频繁启停"] --> QQ["寿命加速测试"]
end
style G fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style I fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style K fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
点击下载：VBA2307B规格书
中文
English
