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. 06, 2017
Filed:
Apr. 27, 2012
Sjoerd Bosga, Väster{dot over (a)}s, SE;
Freddy Magnussen, Vasteras, SE;
Heinz Lendenmann, Väster{dot over (a)}s, SE;
Rahul Kanchan, Vasteras, SE;
Reza Moghaddam Rajabi, Vasteras, SE;
Sjoerd Bosga, Väster{dot over (a)}s, SE;
Freddy Magnussen, Vasteras, SE;
Heinz Lendenmann, Väster{dot over (a)}s, SE;
Rahul Kanchan, Vasteras, SE;
Reza Moghaddam Rajabi, Vasteras, SE;
ABB Research Ltd., Zurich, CH;
Abstract
For identifying the machine type of an alternating current machine, a direct current is first applied to the stator for aligning the d-axis of the rotor and the magnetic field direction of the stator. Secondly, a direct current is applied to the stator at a current angle which causes the rotors of a permanent magnet machine and a synchronous reluctance machine to exert torque in different directions. The torque direction of the rotor is detected and the machine type is identified based on the torque direction information. The machine type is recognized as a permanent magnet machine or a synchronous reluctance machine depending on the torque direction. If no torque is detected, then the machine type is recognized as an induction machine.