Rail Brake System Using a Linear Induction Motor for Dynamic Braking

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  • Sakamoto Yasuaki
    Maglev Systems Technology Division, Railway Technical Research Institute
  • Kashiwagi Takayuki
    Maglev Systems Technology Division, Railway Technical Research Institute
  • Tanaka Minoru
    Maglev Systems Technology Division, Railway Technical Research Institute
  • Hasegawa Hitoshi
    Maglev Systems Technology Division, Railway Technical Research Institute
  • Sasakawa Takashi
    Maglev Systems Technology Division, Railway Technical Research Institute
  • Fujii Nobuo
    Dept. of Electrical and Electronic Systems Eng., Graduate School of Information Science and Electrical Engineering, Kyushu University

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Other Title
  • リニア誘導モータを用いた発電制動型レールブレーキシステム
  • リニア ユウドウ モータ オ モチイタ ハツデン セイドウガタ レール ブレーキ システム

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Description

One type of braking system for railway vehicles is the eddy current brake. Because this type of brake has the problem of rail heating, it has not been used for practical applications in Japan. Therefore, we proposed the use of a linear induction motor (LIM) for dynamic braking in eddy current brake systems. The LIM reduces rail heating and uses an inverter for self excitation.<br>In this paper, we estimated the performance of an LIM from experimental results of a fundamental test machine and confirmed that the LIM generates an approximately constant braking force under constant current excitation. At relatively low frequencies, this braking force remains unaffected by frequency changes. The reduction ratio of rail heating is also approximately proportional to the frequency. We also confirmed that dynamic braking resulting in no electrical output can be used for drive control of the LIM. These characteristics are convenient for the realization of the LIM rail brake system.

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