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:
Mar. 29, 2022
Filed:
Mar. 13, 2018
Lappeenrannan-lahden Teknillinen Yliopisto Lut, Lappeenranta, FI;
Rafal Piotr Jastrzebski, Lappeenranta, FI;
LAPPEENRANNAN-LAHDEN TEKNILLINEN YLIOPISTO LUT, Lappeenranta, FI;
Abstract
An electric drive comprises a bearingless electric machine, a converter, and a control device. The stator of the electric machine has a cage winding including bars connected to a conductor ring. The control device controls the converter to supply torque generating current components to the bars so that torque is generated in accordance with electric machine control and to supply levitation current components to the bars so that the rotor of the bearingless electric machine is levitated in accordance with levitation control. The cage winding allows the currents of the bars to be controlled so that different current sheet distributions can be generated so as to generate desired torque and magnetic force.