US 12,476,570 B2
Electric traction system
Yu Qi, Hunan (CN); Wenqing Mei, Hunan (CN); Liangjie Liu, Hunan (CN); Zechun Dou, Hunan (CN); Xiong Liu, Hunan (CN); Yuecheng Xie, Hunan (CN); and Bin Liu, Hunan (CN)
Assigned to CRRC ZHUZHOU INSTITUTE CO., LTD, Hunan (CN); and ZHUZHOU CRRC TIMES ELECTRIC CO., LTD., Hunan (CN)
Appl. No. 18/552,030
Filed by CRRC Zhuzhou Institute Co., Ltd, Hunan (CN); and Zhuzhou CRRC Times Electric Co., Ltd., Hunan (CN)
PCT Filed Jul. 2, 2021, PCT No. PCT/CN2021/104289
§ 371(c)(1), (2) Date Sep. 22, 2023,
PCT Pub. No. WO2022/205654, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 202110355484.1 (CN), filed on Apr. 1, 2021.
Prior Publication US 2024/0171108 A1, May 23, 2024
Int. Cl. H02P 25/18 (2006.01); B60L 7/14 (2006.01); B61C 9/38 (2006.01); H02P 27/06 (2006.01)
CPC H02P 27/06 (2013.01) [B60L 7/14 (2013.01); B61C 9/38 (2013.01); B60L 2210/22 (2013.01); B60L 2220/54 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An electric traction system, comprising:
a step-down transformer comprising a primary winding for operatively coupling to an AC power supply and a secondary winding which is inductively coupled to the primary winding;
a traction converter module comprising a first input terminal and a second input terminal which are operatively coupled to the secondary winding, and a plurality of AC-to-AC power converters, each of which comprises first and second input nodes configured to receive AC power and output nodes configured to supply AC power, wherein the first and second input nodes of the plurality of AC-to-AC power converters are electrically connected in series between the first input terminal and the second input terminal; and
at least one electric motor configured to be driven by the traction converter module.