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Title:
MOTOR DRIVING APPARATUS HAVING POWER-SUPPLY REGENERATION FUNCTION
Document Type and Number:
Japanese Patent JP2011151918
Kind Code:
A
Abstract:

To provide a motor driving apparatus that allows a regenerative operation of a rectifier to be surely continued during continuous power supply from an inverter, or to be surely stopped at the end of power supply from the inverter.

The motor driving apparatus is equipped with: a rectifier; and an inverter so as to execute power-supply regeneration. The apparatus is also equipped with: a detecting part which detects the input voltage and current of a three-phase AC input power supply; an instantaneous effective power calculating part which calculates the instantaneous effective power supplied from the rectifier to the inverter on the basis of the input voltage and current to be detected; a DC component calculating part which calculates the DC component of the effective power supplied from the rectifier to the inverter on the basis of the power value calculated by the instantaneous effective power calculating part; and a regenerative-operation stop determination part which compares the value of the DC component to be calculated with a prescribed threshold and determines to stop power-supply regeneration operation for feeding regenerative power supplied from the inverter back to the three-phase AC input power supply when the value of the DC component is larger than the threshold.


Inventors:
IWASHITA HEISUKE
OKITA HAJIME
NIWA SHOICHI
Application Number:
JP2010010151A
Publication Date:
August 04, 2011
Filing Date:
January 20, 2010
Export Citation:
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Assignee:
FANUC LTD
International Classes:
H02P3/18; H02M7/12; H02P27/06
Domestic Patent References:
JP2004180427A2004-06-24
JP2004088862A2004-03-18
JPH11289794A1999-10-19
JPS56111922A1981-09-04
JP2006020383A2006-01-19
Attorney, Agent or Firm:
青木 篤
鶴田 準一
伊坪 公一
榎原 正巳
小林 龍