Conducted electromagnetic interference analysis method for traction drive system in high speed trains

2017 ◽  
Author(s):  
Zhichang Yang ◽  
Hong Li ◽  
Zhongping Yang ◽  
Yue Xu ◽  
Peng Lin
Keyword(s):  
Electromagnetic Interference ◽  
High Speed ◽  
Drive System ◽  
Analysis Method ◽  
Interference Analysis ◽  
Traction Drive ◽  
High Speed Trains

scholarly journals Risks of Ear Complaints of Passengers and Drivers While Trains Are Passing Through Tunnels at High Speed: A Numerical Simulation and Experimental Study

2019 ◽  
Vol 16 (7) ◽  
pp. 1283 ◽  
Author(s):  
Pengpeng Xie ◽  
Yong Peng ◽  
Tiantian Wang ◽  
Honghao Zhang
Keyword(s):  
High Speed ◽  
Fe Model ◽  
Analysis Method ◽  
High Speed Train ◽  
Pressure Transients ◽  
Operation Speed ◽  
High Speed Trains ◽  
Recorded Data ◽  
Four Levels ◽  
Human Middle Ear

Ear complaints induced by interior pressure transients are common experiences for passengers and crew members when high-speed trains are passing through tunnels. However, approaches to assessing the risks of the pressure-related aural discomfort have not been reported until recently. The objective of this study was to evaluate the hazards of interior pressure transients of high-speed train on human ears combining the effects of operation speed and seal index. Moving model tests were conducted to obtain the pressure transients when the model train runs in the tunnel. The recorded data were transformed into the interior pressures by empirical formula. Furthermore, the aural sensations were divided into four levels hierarchically and the range for each level was derived by logistic regression analysis method and represented by three biomechanical metrics. Furthermore, a human middle ear finite element (FE) model was used to simulate its dynamics under the interior pressures. The results indicate that lifting operation speed from 250 km/h to 350 km/h in tunnel will prolong the duration of ear complaints by more than two times whereas improving the seal index from 4 s to 12 s will reduce the incidences of the onset of tinnitus and hearing loss by more than ten times. In addition, the duration of aural comfort shortens from the head car to the tail car against the running direction. It is desirable that enhancing the seal index improve the aural sensations of the passengers and crew members considering the lifting operation speed of high-speed train.

Application Research on CHR2 Type EMU Braking System

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Lei Pan
Keyword(s):  
High Speed ◽  
Power Source ◽  
Drive System ◽  
Application Research ◽  
Power Sources ◽  
Traction Drive ◽  
Braking System ◽  
Multi Level ◽  
Traction Power

CRH2 high-speed EMU is power source of traction drive system. The whole system is evenly distributed among the four basic units of the whole EMU, forming a complete combination of power sources. Large traction power, start smooth, fast and efficient, effectively inhibit the idle and taxi protection in place and other characteristics, and with a number of system chain control, to achieve smooth operation, multi-level speed and accurate parking.

Design of a Self-Actuating, Traction Drive System for High-Speed Ratios

2003 ◽  
Author(s):  
Michael J. Harper ◽  
Donald R. Flugrad ◽  
Abir Z. Qamhiyah
Keyword(s):  
High Speed ◽  
Power Transmission ◽  
Drive System ◽  
Speed Ratio ◽  
Rolling Motion ◽  
Traction Drive ◽  
Rolling Elements ◽  
Drive Systems ◽  
Two Stages ◽  
Efficient Power

Traction drive systems offer unique advantages over geared systems. They will typically run quieter and they can be designed to eliminate all backlash. Furthermore, rolling elements are easy to manufacture and the rolling motion will produce very efficient power transmission. In this paper the authors describe a two-stage, self-actuating, traction drive system that has been fabricated to produce a speed ratio of 50:1. Given specific values for coefficients of friction, the geometry of each stage of the device must be designed to ensure self-actuation. In addition, dimensions of the drive rollers and output rings for the two stages must be selected to ensure that one stage does not cause the other stage to overrun.

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