Abstract
This paper focuses on electric train deceleration under wet or snowy railway track conditions. In this condition, there is a risk that the driving wheels becoming locked, which causes damage to the wheel tread, i.e., a "wheel flat." This paper proposes an anti-lock driving wheel control system for electric train sets that employs a regenerative brake feedback signal generated by a propulsion inverter. The purpose of this research is to prevent driving wheel flats. The proposed method manipulates the RB signal only in situations where the driving wheel is likely to be locked, as determined according to the driving wheel speed and the acceleration. This method is expected to prevent driving wheel flats even if anti-skid valves are not equipped. In the present research, we investigate the usability of the proposed method using numerical simulations. This paper conducts to address the situation where a high deceleration reference is required under low adhesion-coefficient conditions. The simulation results without the conventional anti-skid control indicate that wheel flats are generated in the motor coach. In contrast, the proposed method is able to prevent wheel flats even if the anti-skid valves are not equipped. The proposed method is also able to apply to the motor coach which equips the anti-skid valves. The simulation results indicate that anti-skid control multiplexes to prevent wheel flats.
