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:
Sep. 14, 2010
Filed:
Sep. 15, 2008
Joshua Williams, Peoria, IL (US);
Joshua Williams, Peoria, IL (US);
Caterpillar Inc, Peoria, IL (US);
Abstract
A method of voltage supply management for an electric drive system includes receiving a voltage signal () indicative of a voltage in a supply link, and one or more condition signals that are indicative of an operating condition of the electric drive system. A difference between a desired voltage value (), which is calculated based on the voltage signal () and the one or more condition signals, and the voltage signal () yields a voltage error signal (). The voltage error signal () is evaluated to indicate an over-voltage condition or an under-voltage condition. Power is dissipated from the supply link when an over-voltage condition is present and a torque command limit with respect to the one or more electric drive motors () is imposed when an under-voltage condition is present.