设计了大型挖掘机械直流电动机激磁电路的转换与控制电路。

A control circuit for transition control in DC motor field excitation on large power shovel has been designed.

youdao

设计了大型挖掘机械直流电动机激磁电路的转换与控制电路。

A control circuit for transition control in DC motor field excitation on large power shovel has been designed.

youdao