(19)
(11)EP 2 096 747 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
22.06.2011 Bulletin 2011/25

(43)Date of publication A2:
02.09.2009 Bulletin 2009/36

(21)Application number: 08171687.0

(22)Date of filing:  15.12.2008
(51)International Patent Classification (IPC): 
H02M 5/297(2006.01)
(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30)Priority: 28.02.2008 JP 2008048212

(71)Applicant: FANUC CORPORATION
Oshino-mura Minamitsuru-gun Yamanashi 401-0597 (JP)

(72)Inventors:
  • Iwashita, Yasusuke
    Minamitsuru-gun Yamanashi 401-0597 (JP)
  • Yaeshima, Mamoru
    Minamitsuru-gun Yamanashi 401-0597 (JP)
  • Yamada, Yuuichi
    Minamitsuru-gun Yamanashi 401-0597 (JP)
  • Shirouzu, Masatomo
    Minamitsuru-gun Yamanashi 401-0597 (JP)
  • Sakai, Koujirou
    Minamitsuru-gun Yamanashi 401-0597 (JP)

(74)Representative: Ward, James Norman 
Haseltine Lake LLP Lincoln House, 5th Floor 300 High Holborn
London WC1V 7JH
London WC1V 7JH (GB)

  


(54)Motor driving apparatus


(57) A motor driving apparatus comprises a charge/discharge control circuit for controlling charge to or discharge from a capacitor connected in parallel in a link section between a converter and an inverter, and a current control means for controlling discharge current from the charge/discharge control circuit. The current control means controls discharge current from the charge/discharge control circuit based on input current to the inverter or output current from the converter so that output current from the converter is equal to a prescribed value.







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