![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[多选题]
在A系列龙门刨床电气控制电路中电流正反馈环节的作用是()
A.对电枢的电压变化能做出调控
B.补偿电动机电枢绕组与换向极绕组电压降所引起的转速降落
C.加快过渡过程
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
BC
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.对电枢的电压变化能做出调控
B.补偿电动机电枢绕组与换向极绕组电压降所引起的转速降落
C.加快过渡过程
BC
A.500mm
B.800mm
C.1000mm
D.1200mm
当K=1时(即R2=R0)时,电流反馈电阻R、比较电压Ub(忽略二极管V的正向压降)各为多少?
A.5
B.10
C.15
D.20
A.5t
B.8t
C.10t
D.12t