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:
Jun. 17, 2014
Filed:
Jul. 14, 2011
Michael Arnett, Wixom, MI (US);
Steven E. Schulz, Torrance, CA (US);
Bon Ho Bae, Torrance, CA (US);
Silva Hiti, Redondo Beach, CA (US);
Ronghui LI, Torrance, CA (US);
Michael Arnett, Wixom, MI (US);
Steven E. Schulz, Torrance, CA (US);
Bon Ho Bae, Torrance, CA (US);
Silva Hiti, Redondo Beach, CA (US);
Ronghui Li, Torrance, CA (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
Methods, system and apparatus are provided for reducing power loss in an electric motor drive system that includes an electric machine and an inverter module. A controller determines whether a torque command (T) is less than a minimum torque threshold (T) that is required to disable the inverter module, and if so, increments a counter and determines whether the torque command (T) remains less than the minimum torque threshold (T). When the torque command (T) remains less than the minimum torque threshold (T), the controller checks to determine whether a current count value (n) maintained at the counter is greater than a count threshold (n), and if so, the controller can generate a disable signal to disable switching within the inverter module.