Design of varied-frequency high-speed motor;

In the control frame,the two stator current vectors are separately controlled in closed loops with dissimilar frequency power supplies as the shunt structure in the vector controls for two normal motors,each according to the maximum torque per ampere.

Combined with the change of power supplying system of Tangshan Mine transformer substation, this article gives the middle power supplying method instead of one direction.

Application of centralized power supply system in subways;

Study on Coordination and Planning Theory and Its Application in Distributed Generation and Centralized Power Supply in China;