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:
Mar. 28, 2023
Filed:
Mar. 17, 2021
Shenzhen Vmax New Energy Co., Ltd., Guangdong, CN;
Jun Liu, Guangdong, CN;
Yingying Feng, Guangdong, CN;
Shun Yao, Guangdong, CN;
Changsheng Zhang, Guangdong, CN;
SHENZHEN VMAX NEW ENERGY CO., LTD., Guangdong, CN;
Abstract
A pre-chargeable DCDC conversion circuit includes a high-voltage side conversion module connected to a primary winding of a main transformer T, a low-voltage side conversion module connected to a secondary winding of the main transformer, and a controller used for controlling the high-voltage side conversion module and the low-voltage side conversion module. A pre-charging module is connected in series in a direct-current bus of the low-voltage side conversion module, and the pre-charging module is used for pre-charging a capacitor of electric equipment connected to a direct-current bus of the high-voltage side conversion module when the complete machine is powered on. The pre-charging module and a forward DCDC share most of power devices and power loops, and only a small number of devices are added, such that the volume and cost are reduced compared with an independent pre-charging branch, and the control mode is simple.