The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2021
Filed:
Jan. 19, 2021
Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd., Qingdao, CN;
Bo Zhang, Qingdao, CN;
Bo Li, Qingdao, CN;
Meiyun Li, Qingdao, CN;
Wendong Ji, Qingdao, CN;
Qingwen Sun, Qingdao, CN;
Junbo Zhao, Qingdao, CN;
Zhenzong Zhu, Qingdao, CN;
Yongjie Mao, Qingdao, CN;
Shen Wang, Qingdao, CN;
Yu Wang, Qingdao, CN;
Abstract
A synchronous soft-start networking control strategy for parallel auxiliary converters of EMU, that is, when a first auxiliary converter is connected to the bus, non-first auxiliary converters complete the networking during an amplitude soft-start process of the first auxiliary converter. Specific solution is: fast networking logic, bus fast-tracking logic and PQ droop networking control strategy. Wherein, the fast networking logic comprises recognizing the first auxiliary converter and the non-first auxiliary converter; the bus fast-tracking logic comprises tracking phase, frequency and amplitude; the PQ droop networking control strategy comprises introducing a correction coefficient K. The synchronous soft-start networking control strategy for the parallel auxiliary converters of EMU can realize quickly and reliably automatic networking in an emergency traction mode of EMU, and significantly shorten networking time in a network normal mode of EMU. Therefore, it can ensure that EMU can complete startup loading within a specified time under various working conditions, which provides strong guarantee for stable and reliable operation of EMU.