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:
May. 21, 2019
Filed:
Sep. 10, 2015
Trane International Inc., Piscataway, NJ (US);
Nathan Thomas West, Holmen, WI (US);
Benjamin James Sykora, Holmen, WI (US);
David Marshall Foye, LaCrosse, WI (US);
Dennis Myron Beekman, LaCrosse, WI (US);
Korwin Jay Anderson, Pasadena, CA (US);
Robert Bakkestuen, Onalaska, WI (US);
Trane International Inc., Piscataway, NJ (US);
Abstract
A system includes a refrigerant circuit including a compressor, a condenser, an expander, an electric motor configured to drive the compressor, and a controller configured to control a motor drive to drive the electric motor. The controller is configured to first evaluate whether the compressor is idle based upon a control state of the controller being configured not to operate the motor drive to drive the motor, second, in response to an affirmative evaluation that the compressor is idle, evaluate a risk of undesired or un-commanded compressor rotation based upon a combination of two or more system conditions, each of the two or more system conditions indicating the risk of undesired or un-commanded compressor rotation, and third, in response to an affirmative evaluation of the risk of undesired or un-commanded compressor rotation, control the motor drive to oppose rotation of the compressor.