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. 10, 2019
Filed:
Nov. 17, 2016
Crrc Qingdao Sifang Co., Ltd., Qingdao, Shandong, CN;
Jiansheng Zhou, Shangdong, CN;
Jinghai Jiao, Shangdong, CN;
Yanzun Yu, Shandong, CN;
Buzhao Niu, Shandong, CN;
Fujie Jiang, Shandong, CN;
Donghua Wu, Shandong, CN;
CRRC QINGDAO SIFANG CO., LTD., Qingdao, Shandong, CN;
Abstract
An auxiliary power supply device for a multiple-unit train is provided. A normally-open main contact of a three-phase isolation contactor is connected in series between a three-phase four-wire bus of a first unit and a three-phase four-wire bus of a second unit, and a coil of the three-phase isolation contactor is connected in series in a power supply circuit of the first unit and a power supply circuit of the second unit; a control circuit of the first unit controls the power supply circuit of the first unit to be energized when the three-phase four-wire bus of the first unit supplies power, to close the normally-open main contact; and the control circuit of the second unit controls the power supply circuit of the second unit to be energized when the three-phase four-wire bus of the second unit supplies power to close the normally-open main contact.