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.
OKITA HAJIME
NIWA SHOICHI
| JP2004180427A | 2004-06-24 | |||
| JP2004088862A | 2004-03-18 | |||
| JPH11289794A | 1999-10-19 | |||
| JPS56111922A | 1981-09-04 | |||
| JP2006020383A | 2006-01-19 |
鶴田 準一
伊坪 公一
榎原 正巳
小林 龍