US 12,017,539 B2
Voltage control method and apparatus, system, and maglev train
Donghua Wu, Shandong (CN); Yanxiao Lei, Shandong (CN); Zhiqiang Zhang, Shandong (CN); Yunfei Wang, Shandong (CN); and Xinmai Gao, Shandong (CN)
Assigned to CRRC QINGDAO SIFANG CO., LTD., Shandong (CN)
Appl. No. 18/031,897
Filed by CRRC QINGDAO SIFANG CO., LTD., Shandong (CN)
PCT Filed May 24, 2021, PCT No. PCT/CN2021/095375
§ 371(c)(1), (2) Date Apr. 14, 2023,
PCT Pub. No. WO2022/077909, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. 202011096586.8 (CN), filed on Oct. 14, 2020.
Prior Publication US 2023/0382235 A1, Nov. 30, 2023
Int. Cl. B60L 13/10 (2006.01); B61C 17/00 (2006.01)
CPC B60L 13/10 (2013.01) [B61C 17/00 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A voltage control method, applied to a maglev train, comprising:
acquiring a train traveling speed; and
determining, based on correspondences between train traveling speeds and transformation ratios, a target transformation ratio corresponding to the train traveling speed, the transformation ratio being a ratio of an input voltage to an output voltage and being used to control a transformer to transform the input voltage;
wherein the correspondences between train traveling speeds and transformation ratios are obtained based on correspondences between train traveling speeds and train traction forces at different transformation ratios.
 
6. A voltage control system, comprising a transformer and a controller, wherein
the transformer is configured to transform power supply current under control of the controller to obtain power current, a voltage of the power supply current is an input voltage, a voltage of the power current is an output voltage, and the power current is configured to drive a power system to provide a traction force for a maglev train; and
the controller is configured to: acquire a train traveling speed, and determine a target transformation ratio corresponding to the train traveling speed based on correspondences between train traveling speeds and transformation ratios, wherein the transformation ratio is a ratio of an input voltage to an output voltage and is used to control a transformer to transform the input voltage, and the correspondences between train traveling speeds and transformation ratios are obtained based on correspondences between train traveling speeds and train traction forces at different transformation ratios.
 
11. A maglev train, comprising a power system and a voltage control system, wherein
the voltage control system comprises a transformer and a controller;
the transformer is configured to transform power supply current under control of the controller to obtain power current, a voltage of the power supply current is an input voltage, a voltage of the power current is an output voltage, and the power current is configured to drive a power system to provide a traction force for a maglev train; and
the controller is configured to: acquire a train traveling speed, and determine a target transformation ratio corresponding to the train traveling speed based on correspondences between train traveling speeds and transformation ratios, wherein the transformation ratio is a ratio of an input voltage to an output voltage and is used to control a transformer to transform the input voltage, and the correspondences between train traveling speeds and transformation ratios are obtained based on correspondences between train traveling speeds and train traction forces at different transformation ratios.