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:
Nov. 28, 2017
Filed:
Feb. 27, 2015
Hitachi Construction Machinery Co., Ltd., Bunkyo-ku, Tokyo, JP;
Tomonori Takada, Tsuchiura, JP;
Shigeyuki Yoshihara, Tsuchiura, JP;
Toshihiko Ishida, Tsuchiura, JP;
Nobuyoshi Takahashi, Tsuchiura, JP;
Naoya Kawakami, Tsuchiura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
To provide a hybrid wheel loader capable of reliably detecting a short-circuited state of a synchronous generator driven by a drive source. The present invention is provided with an MGbeing a synchronous generator driven as an electric generator by an engine and operated as a motor by the electric power supplied from an electrical storage device, an MG inverterhaving a motor current sensorfor detecting motor current flowing through the MGand semiconductor switches, and an HCUfor detecting a short-circuited state of the MG, wherein the HCUdetermines that the MGis in a short-circuited state when the semiconductor switchesof the MG inverterare in an OFF state at gates and when the motor current detected by the motor current sensoris equal to or greater than a specified threshold value.