While regular trains move metal wheels on metal rails, magnetic levitation trains use magnetic repulsion or attraction to float above the tracks. There are also air levitation trains that use air pressure in addition to magnetic force, and in fact experiments with this type of levitation train have been carried out in France under the name Aérotrain. Magnetic levitation has been at the center of development because it can exert a large levitating force and does not produce noise. On the other hand, when it comes to propulsion methods, using levitation means that there is no sliding friction between the wheels and the rails, and therefore it is impossible to propel the vehicle by using it. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
普通形式の鉄道が金属のレールの上を金属の車輪が転送するのに対し,磁気浮上式鉄道は,磁力による反発ないしは吸引力を利用して軌道から浮いた状態で走行する鉄道である。浮上式鉄道としては,磁力以外に空気の圧力を用いる空気浮上方式もあるが,実際,フランスでアエロトランの名で実験が行われたことがある。大きな浮上力を発揮でき,また騒音の発生のないことから,磁気浮上方式が開発の中心となっている。 一方,推進方法については,浮上式を採用するとなると車輪とレールの間のすべり摩擦が働かず,したがってそれによる車両の推進は不可能である。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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