POWER CONVERSION DEVICE AND POWER CONVERSION DEVICE CONTROL METHOD

WIPO Patent Application WO/2015/098154

A1

A permanent magnet for generating the magnetic flux of a PM motor has such a characteristic that when the temperature of the magnet and the current flowing on the armature side exceed a predetermined range, irreversible demagnetization occurs. If the irreversible demagnetization occurs, there have been problems, including the start-up failure of the PM motor, the shrinking of an operation load range, and the demagnetization of the magnet. A power conversion device comprises: a converter for converting an AC voltage to a DC voltage; a DC intermediate circuit having a smoothing capacitor for smoothing the DC voltage converted by the converter; a current detection circuit for detecting the current output from the power conversion device; an inverter for converting the DC voltage smoothed by the DC intermediate circuit to an AC voltage; and a control circuit for controlling switching elements included in the inverter. The control circuit controls the switching elements of the inverter on the basis of a current threshold value determined according to a first current level value and a second current level value.

JPH0479773	AIR CONDITIONER
JP6107733	Power converter
JP2012095459	INVERTER DEVICE AND POWER TOOL HAVING THE SAME

IBORI SATOSHI (JP)
ONUMA YUSAKU (JP)
TOMITA HIROYUKI (JP)

PCT/JP2014/067305

July 02, 2015

June 30, 2014

Click for automatic bibliography generation  

HITACHI IND EQUIPMENT SYS (JP)

H02M7/48

JP2013192416A	2013-09-26
JP2013198235A	2013-09-30
JP2010144607A	2010-07-01
JP2006026409A	2006-02-02
JP2013198234A	2013-09-30

INOUE Manabu et al. (JP)
Manabu Inoue (JP)

View/Download PDF      PDF Help

Previous Patent: END EFFECTOR AND SUBSTRATE TRANSFER ROBOT

Next Patent: OPERATION TEACHING APPARATUS AND TRANSCRANIAL MAGNETIC STIMULATION APPARATUS