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:
Jul. 09, 2013
Filed:
Jan. 20, 2012
Makoto Yanagisawa, Kanagawa, JP;
Makoto Yanagisawa, Kanagawa, JP;
Sumitomo Heavy Industries, Ltd., Tokyo, JP;
Abstract
A disclosed hybrid-type construction machine includes a generator part configured to generate electric energy by the driving force of an engine; an inverter configured to control the generator part; an electric power accumulator configured to accumulate the electric energy generated by the generator part; a DC bus located between the generator part and the electric power accumulator; and a converter configured to control a voltage of the DC bus, wherein when the electric power accumulator having approximately zero electric energy is charged the inverter of the generator part is not controlled, and a reference value of a voltage command for the DC bus to charge the electric power accumulator is set to be smaller than an induced voltage of the generator part.