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:
Oct. 15, 2013
Filed:
Mar. 16, 2011
Brian A. Welchko, Torrance, CA (US);
Silva Hiti, Redondo Beach, CA (US);
Ronald W. Young, Whittier, CA (US);
David Tang, Fontana, CA (US);
Gregory S. Smith, Woodland Hills, CA (US);
Brian A. Welchko, Torrance, CA (US);
Silva Hiti, Redondo Beach, CA (US);
Ronald W. Young, Whittier, CA (US);
David Tang, Fontana, CA (US);
Gregory S. Smith, Woodland Hills, CA (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
Systems and methods are provided for monitoring current in an electric motor. An electrical system includes a (DC) interface, an electric motor, an inverter module coupled between the DC interface and the electric motor, a first current sensor between a first phase leg of the inverter module and a first phase of the electric motor to measure a first current flowing through the first phase of the electric motor, a second current sensor between the first phase leg and the DC interface to measure a second current flowing through the first phase leg, and a control module coupled to the first current sensor and the second current sensor. The control module is configured to initiate remedial action based at least in part on a difference between the first current measured by the first current sensor and the second current measured by the second current sensor.