(19)
(11) EP 4 249 753 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.10.2023 Bulletin 2023/42

(43) Date of publication A2:
27.09.2023 Bulletin 2023/39

(21) Application number: 23179640.0

(22) Date of filing: 10.12.2021
(51) International Patent Classification (IPC): 
F04D 17/12(2006.01)
F04D 27/00(2006.01)
F04D 29/056(2006.01)
 F04D 25/06(2006.01)
F04D 27/02(2006.01)
(52) Cooperative Patent Classification (CPC):
F04D 17/12; F04D 25/0606; F04D 27/0261; F04D 29/056; F04D 27/0215; F04D 27/001; F05D 2270/335; F04D 27/0292; F04D 27/0207
(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: 21.12.2020 US 202017247724
21.12.2020 US 202017247725

(62) Application number of the earlier application in accordance with Art. 76 EPC:
21840285.7 / 4244487

(71) Applicant: Emerson Climate Technologies, Inc.
Sidney, OH 45365 (US)

(72) Inventors:
  • PEREVOZCHIKOV, Michael M.
    Sidney Ohio, 45365 (US)
  • SWALLOW, Matthew J.
    Sidney Ohio, 45365 (US)

(74) Representative: ATIP 
Armstrong Teasdale Limited 38-43 Lincoln's Inn Fields
London WC2A 3PE
London WC2A 3PE (GB)

   


(54) SURGE CONTROL SYSTEMS AND METHODS FOR DYNAMIC COMPRESSORS


(57) A system includes a dynamic compressor, a variable frequency drive (VFD), and a controller. The dynamic compressor includes a motor having a driveshaft rotatably supported within the dynamic compressor, and a compression mechanism connected to the driveshaft and operable to compress a working fluid upon rotation of the driveshaft. The VFD includes a sensor configured to sense a current provided to the motor. The controller is connected to the motor and includes a processor and a memory. The memory stores instructions that program the processor to operate the motor using the VFD to compress the working fluid, determine when surge events have occurred, store in the memory an indication of each determined surge event, and determine whether or not to take protective action when the processor determines that a surge event has occurred.







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Search report