US 12,358,539 B2
Linear motor for maglev train, and maglev train
Jianying Liang, Shandong (CN); Xiankai Liu, Shandong (CN); Donghua Wu, Shandong (CN); Weitao Han, Shandong (CN); Jin Luan, Shandong (CN); and Fujie Jiang, Shandong (CN)
Assigned to CRRC QINGDAO SIFANG CO., LTD., Shandong (CN)
Appl. No. 17/763,656
Filed by CRRC QINGDAO SIFANG CO., LTD., Shandong (CN)
PCT Filed Jan. 26, 2021, PCT No. PCT/CN2021/073746
§ 371(c)(1), (2) Date Mar. 25, 2022,
PCT Pub. No. WO2021/179816, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 202010168652.1 (CN), filed on Mar. 11, 2020.
Prior Publication US 2022/0340178 A1, Oct. 27, 2022
Int. Cl. B61B 13/08 (2006.01); H01F 7/02 (2006.01); H02K 1/04 (2006.01); H02K 41/02 (2006.01); H02K 41/03 (2006.01); H02N 15/00 (2006.01)
CPC B61B 13/08 (2013.01) [H01F 7/0236 (2013.01); H01F 7/0247 (2013.01); H02K 1/04 (2013.01); H02K 41/02 (2013.01); H02K 41/03 (2013.01); H02K 41/031 (2013.01); H02N 15/00 (2013.01); H02K 2201/03 (2013.01); H02K 2213/03 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A linear motor of a maglev train, comprising: a primary and a secondary that are arranged oppositely, wherein an air gap is provided between the primary and the secondary, the air gap has a first distance in a non-working state, and has a second distance in a working state;
a permeability magnetic film is provided on a surface of the primary facing the secondary, the permeability magnetic film is elastic in a thickness direction, and a thickness of the permeability magnetic film is greater than the first distance and is smaller than the second distance; and
the permeability magnetic film comprises a permeability magnetic substrate and a non-permeability magnetic substrate that are alternately distributed along a surface of the permeability magnetic film, and the permeability magnetic substrate is filled with a permeability magnetic film material; the permeability magnetic substrate covers a magnetic pole of the surface of the primary facing the secondary, and the non-permeability magnetic substrate covers a gap between adjacent magnetic poles.