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. 13, 2016
Filed:
May. 25, 2012
Tomi Knuutila, Kuukanniemi, FI;
Riku Pöllänen, Lappeenranta, FI;
Samuli Kallio, Helsinki, FI;
Pasi Peltoniemi, Lappeenranta, FI;
Jussi Karttunen, Lappeenranta, FI;
Tomi Knuutila, Kuukanniemi, FI;
Riku Pöllänen, Lappeenranta, FI;
Samuli Kallio, Helsinki, FI;
Pasi Peltoniemi, Lappeenranta, FI;
Jussi Karttunen, Lappeenranta, FI;
THE SWITCH DRIVE SYSTEMS OY, Lappeenranta, FI;
Abstract
An apparatus comprises a processing system () configured to produce voltage control signals for controlling an electrical machine () comprising two or more multiphase stator windings. The processing system is configured to produce the voltage control signals on the basis of rotation-converted stator currents expressed in a coordinate system bound to a rotor of the electrical machine and on the basis of a model of the electrical machine modeling at least inductances of the multiphase stator windings and mutual inductances between the multiphase stator windings. The processing system is configured to convert phase currents of the multiphase stator windings into the rotation-converted stator currents with a conversion rule corresponding to a form of the model of the electrical machine where each of the stator flux-linkages of the model is dependent on only one of the rotation-converted stator currents in spite of the mutual inductances between the multiphase stator windings.