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:
Dec. 05, 2023
Filed:
Nov. 27, 2019
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Mitsuhiro Kadota, Tokyo, JP;
Masatsugu Arai, Tsuchiura, JP;
Takayuki Satou, Tsuchiura, JP;
Naoki Fukuda, Tsuchiura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A power regeneration devicethat converts the power of a main engine DC lineconnected to a main engine power generatorthrough a rectification circuitto supply the converted power to an accessory DC lineconnected to an accessory power generatorthrough a rectification circuitincludes a plurality of power conversion modulestoN configured such that input sectionstoNa are connected in series. The main engine power generatorand a power consumption deviceare controlled such that a voltage input to the power regeneration devicedoes not exceed a voltage upper limit value Vm and a portion between a positive electrode terminal (+) and a negative electrode terminal (−) of each of the input sections of the power conversion modules to be stopped is short-circuited by a bypass device and the voltage upper limit value Vm is decreased when some of the plurality of power conversion modulestoN are stopped. With this configuration, operational continuity can be improved while a device size increase is prevented.