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. 10, 2026
Filed:
Nov. 20, 2021
Danfoss Editron Oy, Lappeenranta, FI;
Antti Tarkiainen, Lappeenranta, FI;
Juha Toikka, Lappeenranta, FI;
Tapani Siivo, Lappeenranta, FI;
Mikko Piispanen, Lappeenranta, FI;
Mika Björkholm, Lappeenranta, FI;
DANFOSS EDITRON OY, Lappeenranta, FI;
Abstract
A converter () for driving an electric machine whose stator windings are changeable to be in a low-speed configuration or in a high-speed configuration includes a converter stage () for supplying stator voltages to the stator windings, and a control system () that controls the stator windings to be in the low-speed configuration or in the high-speed configuration. The control system deactivates the converter stage during a change between the low-speed configuration and high-speed configuration and limits torque of the electric machine so that a torque limit is higher when the stator windings are in the low-speed configuration than when the stator windings are in the high-speed configuration. As the torque limit is changed when the number of series connected turns of the stator windings is changed, unwanted current transients can be reduced.