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Title:
VARIABLE CAPACITY DRIVE CIRCUIT FOR LINEAR COMPRESSOR IN REFRIGERATING ELECTRICAL APPLIANCE
Document Type and Number:
WIPO Patent Application WO/2022/105738
Kind Code:
A1
Abstract:
A method for operating a variable capacity drive circuit (800) of a compressor (64, 100) comprises: operating a first four quadrant switch (804) and a second four quadrant switch (806) in a first state, wherein in the first state, the first four quadrant switch (804) is closed and the second four quadrant switch (806) is open (1202), so that voltage experienced by an electrical machine (808) is equal to AC line voltage (802); operating the first four quadrant switch (804) and the second four quadrant switch (806) in the second state, wherein in the second state, the first four quadrant switch (804) is open and the second four quadrant switch (806) is closed (1204), so that the voltage experienced by the electric machine (808) is zero; providing a positive trigger angle (1010) and a negative trigger angle (1012) (1206); on the basis of the positive trigger angle (1010) and the negative trigger angle (1012), defining any time that the first four quadrant switch (804) and the second four quadrant switch (806) operate in each of the first state and the second state (1208); and using the positive trigger angle (1010) and the negative trigger angle (1012) to transition between the first state and the second state at a switching frequency determined by the frequency of the AC line voltage (1210).

Inventors:
LATHAM JOSEPH WILSON (US)
HAHN GREGORY WILLIAM (US)
Application Number:
PCT/CN2021/130871
Publication Date:
May 27, 2022
Filing Date:
November 16, 2021
Export Citation:
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Assignee:
HAIER SMART HOME CO LTD (CN)
QINGDAO HAIER REFRIGERATOR CO LTD (CN)
HAIER US APPLIANCE SOLUTIONS INC (US)
International Classes:
F25B49/02; F04B49/06
Foreign References:
CN103052801A2013-04-17
KR20030069711A2003-08-27
CN110530083A2019-12-03
CN101836354A2010-09-15
CN101495935A2009-07-29
US20200240406A12020-07-30
CN1704590A2005-12-07
Other References:
See also references of EP 4230929A4
Attorney, Agent or Firm:
SUZHOU WISPRO INTELLECTUAL PROPERTY AGENCY (CN)
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