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Title:
POWER CONVERSION DEVICE
Document Type and Number:
Japanese Patent JP2011244557
Kind Code:
A
Abstract:

To provide a power conversion device consisting of multiple inverters without power regeneration capability which can generate a prescribed braking torque for decelerating an AC motor in both cases where the AC motor rotates at a high speed and at a low speed, while reducing energy and a cost.

This invention relates to a power conversion device comprising a multiwinding transformer 4 and multiple inverters 1 to 3 without power regeneration capability which are constituted by connecting a plurality of single-phase inverter units in series. An AC motor 5 is driven by these multiple inverters 1 to 3. A power consumption circuit 6 consisting of a switch 61 and a resistor 62 for consuming power generated by the AC motor 5 is connected through a step-down transformer 7 to the input side of the AC motor 5.


Inventors:
OSAWA HIROSHI
HANAZAWA MASAHIKO
OKAMURA KOICHI
BABA KENJI
Application Number:
JP2010112804A
Publication Date:
December 01, 2011
Filing Date:
May 17, 2010
Export Citation:
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Assignee:
FUJI ELECTRIC CO LTD
International Classes:
H02P3/22; H02M7/49; H02P27/06
Domestic Patent References:
JP2000050636A2000-02-18
JP2009171745A2009-07-30
JP2009529308A2009-08-13
JP2005033903A2005-02-03
JP2008182821A2008-08-07
Attorney, Agent or Firm:
森田 雄一