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Rail brake system using a linear induction motor for dynamic braking
Author(s) -
Sakamoto Yasuaki,
Kashiwagi Takayuki,
Tanaka Minoru,
Hasegawa Hitoshi,
Sasakawa Takashi,
Fujii Nobuo
Publication year - 2011
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.21209
Subject(s) - linear induction motor , eddy current brake , brake , automotive engineering , inverter , threshold braking , dynamic braking , linear motor , eddy current , realization (probability) , electronic brakeforce distribution , control theory (sociology) , braking system , engineering , electrical engineering , voltage , induction motor , computer science , control (management) , mathematics , statistics , artificial intelligence
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. 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. © 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 178(2): 29–38, 2012; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21209