Design Of Pantograph Active Control Experimental Device And Research Of Control Strategy

China’s high-speed railways develop rapidly, the high speed electric train becomes mainstream. It obtains current from the catenary by the pantograph, pantograph and contact wire’s good relationship is the important condition for the stable operation of the train. However, with the development of the train’s running speed is increased, the mechanical vibrations between the pantograph and catenary become more and more fierce. It will separate pantograph with contact wire if the oscillation amplitude is too big. This phenomenon is harmful to the train, it makes train’s running be not stable. It will generate offline arc, the arc will ablate pantograph and contact wire. Arc is strong electromagnetic interference source, it interferences the communication between the equipments, it can also cause serious pantograph fault which will cause the train’s outage, which leads to huge economic losses. How to improve the stability between the pantograph and catenary becomes hot in high speed train’s research in domestic and foreign.This paper from the angle of pantograph’s active control, in-depth research how to restrain the arc between pantograph and catenary, how to improve the contact force between pantograph and catenary, and how to improve the relationship between pantograph and contact wire. Hope to provide a reference for the development of China’s high-speed railway.The main contents of this paper are:Firstly, paper analysis the dynamic models of catenary and pantograph and some active control laboratory simulation devices. On the basis of laboratory model of the pantograph, we design and produce a new catenary laboratory simulation device, which constitutes a new set of pantograph and catenary experimental platform. The device can achieve pantograph and catenary’s flexible linear sliding in the experimental condition and the relative sliding velocity is adjustable. Other laboratory simulation devices do not have these features.Secondly, the active control system’s PID control based on DSP of will realize the active control of the contact force between pantograph and catenary. The control system includes a data acquisition section, DSP controller and the driver of pantograph’s simulation apparatus. Data acquisition section contains the sensor which collects the original signal and the signal adjust circuit; DSP controller includes hardware circuit of DSP chip, A/D conversion circuit, a digital filtering algorithm, PID control software algorithms, and the control signal switching circuit.The electric driver of pantograph simulation device includes stepper motor driver and over-current protection circuit of the motor.Finally, the debugging of pantograph and catenary experimental platform, laboratory results show that the active control of pantograph greatly improved the performance of the pantograph and catenary, reduced the contact force’s wave amplitude between pantograph and catenary, effectively decreased the offline arc. This set of experimental platform and its control algorithm for the active control of electric locomotive pantograph has laid a good foundation.