, it is true, the newer trains have quieter motor sounds in my country too, the UK. I really hate the "aventra" trains we have here of the uk, they make no sound, quite underwhelming. Some trains make sound, but the new english trains are pretty quiet and boring.
English Our new trains, which are currently delivered or in final test, use Alstom IGBT (or IGBT-Si). We are not yet using SiC Mosfet. In fact we still hear the "stages" in acceleration or braking except the Mp14 where it is more a meow. On the other hand, since 2015 we have been using PMSM on a massive scale on new trains instead of squirrel-cage asynchronous motors. For the transmission we exclusively use the parallel hollow shaft cardan joint, which is less noisy at high speed, but we compensate by trains developing a lot of power with an MT ratio of more than 66%. The RER NG in final test developed for 6/7 cars ( 4M2T/4M3T ratio) 5000kW of power. 日本 納品中または最終テスト段階にある新しいトレインは、Alstom IGBT(またはIGBT-Sis)を使用します。 SiCMosfetはまだ使用されていません。 実際、ニャーと鳴くMp14を除いて、加速またはブレーキをかけるときに「ステップ」が聞こえます。 一方、2015年以降、新しい列車は非同期のかご形機の代わりにPMSMを大規模に使用しています。 トランスミッションは、高速時の騒音の少ない平行中空軸カルダンジョイントのみを使用していますが、MT比66%以上の高効率トレインで補完しています。RERNGは、6/7車(4M2T / 4M3T比)のトレインセットとフォーメーションあたり5000kW用に開発されました。
I still don't get why the E235-1000 has a slow acceleration.
@powwowmowwow2 жыл бұрын
I'd say that it is artificially throttled to match the performance of the E217 Series. I predict that when those are retired, the E235 acceleration will be bumped back up to 2.5kmh/s, which is I think is the same as on the E231 and E233 Series.