(19)
(11) EP 4 412 069 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

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

(48) Corrigendum issued on:
25.09.2024 Bulletin 2024/39

(43) Date of publication:
07.08.2024 Bulletin 2024/32

(21) Application number: 22876374.4

(22) Date of filing: 28.09.2022
(51) International Patent Classification (IPC): 
H02M 1/12(2006.01)
 H02M 7/48(2007.01)
(52) Cooperative Patent Classification (CPC):
H02M 1/12; H02M 7/48; H02M 1/44; H02M 1/123; H02M 7/003; H02M 1/126
(86) International application number:
PCT/JP2022/036252
(87) International publication number:
WO 2023/054508 (06.04.2023 Gazette 2023/14)
(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 RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 30.09.2021 JP 2021162109

(71) Applicant: Daikin Industries, Ltd.
Osaka-shi, Osaka 530-0001 (JP)

(72) Inventors:
  • KOYAMA, Yoshitsugu
    Osaka-shi, Osaka 530-0001 (JP)
  • OKUZONO, Kodai
    Osaka-shi, Osaka 530-0001 (JP)
  • KONO, Masaki
    Osaka-shi, Osaka 530-0001 (JP)
  • KAWASHIMA, Reiji
    Osaka-shi, Osaka 530-0001 (JP)
  • DOI, Hirotaka
    Osaka-shi, Osaka 530-0001 (JP)

(74) Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)

   


(54) POWER CONVERSION DEVICE AND REFRIGERATION DEVICE


(57) A power conversion device includes: a power converter using a switching element; and a noise reduction circuit, the noise reduction circuit including: a noise detector configured to detect a common mode noise current or a common mode noise voltage generated in a power line in response to operation of the power converter; an amplifier configured to generate a compensation current based on a detection signal from the noise detector; and an output circuit configured to output the compensation current generated by the amplifier to the power line. A power conversion board carrying the power converter and a canceler board carrying the amplifier are different boards.