Dynamic Characteristics of a Traction Drive System in High-Speed Train Based on Electromechanical Coupling Modeling under Variable Conditions

Abstract

The traction drive system of a high-speed train has a vital role in the safe and efficient operation of the train. This paper established an electromechanical coupling model of a high-speed train. The model considers the interaction of the gear pair, the equivalent connecting device of the transmission system, the equivalent circuit of the traction motor, and the direct torque control strategy. Moreover, the numerical simulation of the high-speed train model includes constant speed, traction, and braking conditions. The results indicate that the meshing frequency and the high harmonics rotation frequency constitute the stator current. Furthermore, both frequencies are evident during constant speed. However, they are blurry among other conditions except for twice the rotation frequency. Meanwhile, the rotor and stator currents’ root-mean-square (RMS) values during traction are less than the RMS value during braking. The initiation of traction and braking causes a significant increase in current. During the traction and braking process, the RMS value of the current gradually decreases. Therefore, it is necessary to pay attention to the impact of the transition process on system reliability.

General Index Reduction by Embedding for Integro-differential-algebraic Equations

“…Belt drive system and chain drive system, are important parts of mechanical transmission system which are widely used in high-tech industries such as automobiles and high-speed railways [36]. Similar to let-off and take-up system [34], they not only implicitly require the coiling amount and let-off amount to be equal in the whole process, but also implicitly require that their energy are equal which help to improve fatigue strength and to avoid deformation heat generation.…”

Running Dynamics of Rail Vehicles

“…Zhang et al focused on high-speed train traction drives. The paper [2] describes a mathematical model considering the interaction of the gear pair, transmission system, circuit of the traction motor, and the direct torque control strategy. The results of the cosimulation of mechanical and electrical parts of the traction system under traction, constant speed, and braking conditions are presented and discussed.…”

Dynamic Characteristics and Fault Mechanism of the Gear Tooth Spalling in Railway Vehicles under Traction Conditions

“…The current research mainly uses a dynamic modeling approach to study its fault mechanism [27][28][29][30], nonlinear behavior [31][32][33], and impact on vehicle dynamics [34][35][36][37][38][39]. Zhang et al [40] proposed electromechanical coupling modeling to describe the interaction between the electrical and mechanical parts of the traction transmission system in a high-speed train. Meanwhile, Wang et al [41] verified the electromechanical coupling mechanism of the traction transmission system using a field test.…”