The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 2021
Filed:
Mar. 06, 2017
Applicant:
Danfoss A/s, Nordborg, DK;
Inventors:
Lin Sun, Tallahassee, FL (US);
HuaiYu Lin, Tallahassee, FL (US);
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B 49/02 (2006.01); H02P 29/50 (2016.01); F04B 49/20 (2006.01); F25B 31/02 (2006.01); H02P 25/22 (2006.01); H02P 27/06 (2006.01); F25B 1/10 (2006.01);
U.S. Cl.
CPC ...
H02P 29/50 (2016.02); F04B 49/20 (2013.01); F25B 31/02 (2013.01); H02P 25/22 (2013.01); H02P 27/06 (2013.01); F25B 1/10 (2013.01); F25B 2400/06 (2013.01);
Abstract
Compressors in a refrigerant loop are driven by variable frequency drives. The variable frequency drives are configured to demand current from an alternating current power source at different phases relative to one another such that at least one current harmonic frequency at the alternating current power source is cancelled.