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Magnetic characteristics of electromagnetic levitation system for short‐radius curve track
Author(s) -
Nomiyama Takuma,
Kakinoki Toshio,
Yamaguchi Hitoshi,
Jifuku Yorito,
Mochizuki Takuro
Publication year - 2006
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.20372
Subject(s) - maglev , levitation , magnet , magnetic levitation , electrodynamic suspension , electromagnetic coil , magnetic damping , suspension (topology) , electromagnet , displacement (psychology) , inductance , electromagnetic suspension , spin stabilized magnetic levitation , magnetic core , engineering , mechanical engineering , electrical engineering , physics , acoustics , magnetic field , voltage , magnetic energy , magnetization , psychology , mathematics , quantum mechanics , homotopy , pure mathematics , vibration , psychotherapist
A magnetically levitated (MAGLEV) vehicle using electromagnets and iron rails generates lateral guiding force naturally by controlling levitation force to maintain the air gaps between the magnets and the iron rails. A MAGLEV system without guide magnets offers simple design and cost advantages. But such a system has little lateral damping force. In order to improve damping characteristics, an experimental apparatus using salient‐pole‐type magnets and laminated iron rails was made. The iron cores were placed in two rows. The suspension coils surrounded both of the magnet iron cores and the damping coils surrounded every magnet core separately. The damping coils were excited by currents proportional to the lateral displacement velocity. According to a step response experiment, the lateral motion dissipated after a cycle or two of the swing. The self‐inductance of the suspension coil of the magnet was almost unchanged against variation of the lateral displacement. The influence of damping current on the levitation was very small. This paper discusses the electromagnetic characteristics of the levitation system. © 2006 Wiley Periodicals, Inc. Electr Eng Jpn, 156(3): 71–80, 2006; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20372