Study on Speedup Technologies for Current Collection System of Shinkansen


Yasukaza FUJII, Masatoshi SHIMIZU, Katsushi MANABE
For speedup of Shinkansen it is important to evaluate dynamic characteristics of overhead catenary-pantograph system in terms of contact loss, contact wire stress and uplift. New studies on the system have revealed effects of wave propagation velocity of contact wire on contact loss, contact wire stress and uplift. It is confiremed that the ratio of train speed to wave propagation velocity of contact wire must be smaller than 0.7-0.8 to keep contact loss, contact wire stress and uplift from exceeding the allowed values. It is also necessary to prohibit a resonance of multi-pantographs at high speed. Furthermore the lift of pantograph must be controlled not to grow excessively large. In this paper we give an outline of the new studies and technologies developed to reduce contact loss, contact wire stress and uplift, such as countermeasure for corrugated wear of contact wire; damping hanger; light push-pull arm; and the optimized overlap structures.