Affiliations: [a] Fuculty of Information Science and Electrical
Engineering, Kyushu University, Fukuoka, Japan
Correspondence:
[*]
Corresponding author: Mitusnobu Terata, Fuculty of Information
Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku,
Fukuoka, 819-0395, Japan. E-mail: terata@em.ees.kyushu-u.ac.jp
Abstract: The characteristics of the high flux density linear synchronous
motor (HFD-LSM) with the special field having V-letter array permanent magnets
(PMs) are studied analytically by using a finite element method (FEM). For gap
variation of plus or minus 4 mm to the typical gap 12 mm on the HFD-LSM with
the thick PM of 40 mm, the change of thrust is only within 3% on the
constant voltage drive. The change of efficiency is only within 0.5%. The
efficiency considered only the copper loss exceeds 0.95 even in the case of the
double length supply. The power factor is about 0.88 for maximum thrust drive.
The influence of PM thickness appears remarkably on the power factor. For 10 mm
thick PM, the reduction rate of the power factor is about 45% compared with
40 mm thick PM.
Keywords: Permanent magnet, synchronous motor, linear synchronous motor, high flux density, high thrust, high efficiency, high power factor, large reluctance, Transportation
