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Patent Searching and Data


Title:
VEHICLE
Document Type and Number:
WIPO Patent Application WO/2011/135621
Kind Code:
A1
Abstract:
It is desirable to improve efficiency of a power conversion apparatus in the case where a motor generator, which is a rotating electrical machine, is driven as a motor and in the case where the motor generator is driven as a generator by performing regenerative braking. In accordance with a predetermined phase of an alternating current output generated by an inverter circuit at the time of the regenerative braking, the inverter circuit is conducted, and a conduction width is controlled, thereby making it possible to control the strength of the regenerative braking. The control makes it possible to reduce the number of switching times of semiconductor elements that constitute the inverter circuit, prevent heat generation, and improve the efficiency. In addition, in the case of driving the motor, it is also possible to improve the efficiency, so the improvement of the efficiency relating to moving becomes possible.

Inventors:
OYAMA KAZUTO (JP)
MIYAZAKI HIDEKI (JP)
FURUKAWA KIMIHISA (JP)
MITSUI TOSHISADA (JP)
NISHIGUCHI SHINGO (JP)
KAMIYA AKINORI (JP)
Application Number:
PCT/JP2010/003033
Publication Date:
November 03, 2011
Filing Date:
April 28, 2010
Export Citation:
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Assignee:
HITACHI LTD (JP)
OYAMA KAZUTO (JP)
MIYAZAKI HIDEKI (JP)
FURUKAWA KIMIHISA (JP)
MITSUI TOSHISADA (JP)
NISHIGUCHI SHINGO (JP)
KAMIYA AKINORI (JP)
International Classes:
B60L9/18; H02M7/48
Domestic Patent References:
WO2008102857A12008-08-28
Foreign References:
JP2007215394A2007-08-23
JP2007159185A2007-06-21
JP2009219331A2009-09-24
JP2005218299A2005-08-11
JP2009044891A2009-02-26
Attorney, Agent or Firm:
INOUE, MANABU (JP)
Manabu Inoue (JP)
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