It throughly solved some long time complicated questions such as high service rate in DC motor, large quantities of maintaining contact type drive controller, high energy consumption of DC locomotive.
It throughly solved some long time complicated questions such as high service rate in DC motor, large quantities of maintaining contact type drive controller, high energy consumption of DC locomotive.
彻底解决了直流电机维修率高、换向火花及接触组火花大、触头式司控器维修量大、直流电机车能耗高等老大难问题。