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.