SYSTEM FOR DRIVING AC MOTOR

WIPO Patent Application WO/2014/136142

A1

The present invention provides a system for driving an AC motor, the system for driving an AC motor being capable of trading power between a current busbar and a storage device using the voltage value of the current busbar without providing means for detecting the amount of the current flowing in the current busbar. This system for driving an AC motor enables a charge and discharge circuit to discharge from the storage device, out of power supplied to an AC motor from an inverter, power exceeding a first power threshold value; and to charge the storage device, out of the regenerative power of the AC motor, with power exceeding a second power threshold value in accordance with the current value and the charge and discharge current amount. The regenerative power of the AC motor is regenerated through the inverter. The current value is detected using means for detecting the current and voltage value, and the charge and discharge current amount is detected using means for detecting the charge and discharge current amount.

WATABU KAZUYOSHI (JP)
TABUCHI AKIKO (JP)
KANDA YOSHINORI (JP)
OKUDA TETSUYA (JP)

PCT/JP2013/001447

September 12, 2014

March 07, 2013

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MITSUBISHI ELECTRIC CORP (JP)
WATABU KAZUYOSHI (JP)
TABUCHI AKIKO (JP)
KANDA YOSHINORI (JP)
OKUDA TETSUYA (JP)

H02P27/06; H02J7/00

WO2004114511A2

2004-12-29

JP2005089134A	2005-04-07
JP2003066078A	2003-03-05
JP2002348057A	2002-12-04
JP2012154668A	2012-08-16

TAKAHASHI, Shogo et al. (JP)
Shogo Takahashi (JP)

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