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:
Apr. 02, 2013
Filed:
Feb. 28, 2011
Long Wu, Fargo, ND (US);
Srujan Kusumba, Fargo, ND (US);
Zimin W. Vilar, Dubuque, IA (US);
Tianjun Fu, Fargo, ND (US);
Robert Shaw, Moorhead, MN (US);
Long Wu, Fargo, ND (US);
Srujan Kusumba, Fargo, ND (US);
Zimin W. Vilar, Dubuque, IA (US);
Tianjun Fu, Fargo, ND (US);
Robert Shaw, Moorhead, MN (US);
Deere & Company, Moline, IL (US);
Abstract
Embodiments of the present invention provide a device and method for generating initial operating points for controlling an interior permanent magnet (IPM) machine. The method includes loading an inductance lookup table, first calculating a maximum torque per Ampere (MTPA) trajectory for a first threshold speed based on machine parameters of the IPM machine, second calculating a truncated voltage limit ellipse with monotonically increasing torque for a first speed based on the machine parameters, if the first speed is higher than the first threshold speed, determining an operating trajectory at the first speed based on at least one of the calculated MTPA trajectory and the calculated truncated voltage limit ellipse, and generating an I,Imap that maps an Ivalue and an Ivalue to each torque command of a plurality of torque commands for the first speed based on the determined operating trajectory.