Title:
EXCAVATOR
Document Type and Number:
WIPO Patent Application WO/2014/041922
Kind Code:
A1
Abstract:
An engine drives a generator, the electricity generated by the generator is stored in a power storage circuit, and a work-use electric motor is driven by electricity supplied from the power storage circuit. The work-use electric motor causes an upper rotating body to rotate. The power storage circuit has a power storage device and multiple buck-boost converters which are parallel-connected to each other. Each buck-boost converter contains a switching element and a reactor. Induced electromotive force is generated in the reactors by the switching of the switching elements, thereby boosting the voltage of the power storage device, which is then supplied to the work-use electric motor.
Inventors:
YUASA HIDEAKI (JP)
Application Number:
PCT/JP2013/071100
Publication Date:
March 20, 2014
Filing Date:
August 05, 2013
Export Citation:
Assignee:
SUMITOMO HEAVY INDUSTRIES (JP)
International Classes:
H02M3/155; E02F9/20
Foreign References:
| JP2009293322A | 2009-12-17 | |||
| JP2009027867A | 2009-02-05 | |||
| JP2006238675A | 2006-09-07 | |||
| JP2008029126A | 2008-02-07 |
Attorney, Agent or Firm:
KITAYAMA, Mikio (JP)
Mikio Kiyama (JP)
Mikio Kiyama (JP)
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