(19)
(11) EP 2 262 092 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
16.02.2011 Bulletin 2011/07

(43) Date of publication:
15.12.2010 Bulletin 2010/50

(21) Application number: 10006087.0

(22) Date of filing: 11.06.2010
(51) International Patent Classification (IPC): 
H02M 7/5387(2007.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated Extension States:
BA ME RS

(30) Priority: 11.06.2009 JP 2009139769

(71) Applicant: Hitachi, Ltd.
Chiyoda-ku Tokyo 100-8280 (JP)

(72) Inventors:
  • Hatsuse, Wataru
    Tokyo 100-8220 (JP)
  • Notohara, Yasuo
    Tokyo 100-8220 (JP)
  • Li, Dongsheng
    Tokyo 100-8220 (JP)
  • Aoyagi, Shigehisa
    Tokyo 100-8220 (JP)
  • Sakamoto, Kiyoshi
    Tokyo 100-8220 (JP)

(74) Representative: Beetz & Partner 
Patentanwälte Steinsdorfstrasse 10
80538 München
80538 München (DE)

   


(54) Inverter controlling apparatus, and air conditioner and washer using the same


(57) Provided is an inverter control apparatus (5) incorporating therein a current reproduction unit (6) which inputs information from a DC-bus current detector 4 for detecting the instantaneous phase currents that flows into an electric motor (1) and that is contained in the DC-bus current flowing into the inverter (2) from a DC power source (3), and which reproduces phase currents that flow into the motor (1) on the basis of the values of the instantaneous phase currents, wherein, in the voltage saturation range, the current production unit (6) calculates the phase currents flowing into the motor (1) on the basis of the average DC-bus current obtained through filtering the DC-bus current and an instantaneous phase current for a single phase; and the voltage commands for the voltages to be applied to the inverter (2) is calculated by using the phase currents.