公开(公告)号：US20240007039A1

公开(公告)日：2024-01-04

申请号：US18255201

申请日：2021-11-20

Applicant: Danfoss Editron Oy

Inventor： Antti TARKIAINEN ,  Juha TOIKKA ,  Tapani SIIVO ,  Mikko PIISPANEN ,  Mika BJÖRKHOLM

IPC: H02P25/18 ,  H02K3/28

CPC classification number: H02P25/182 ,  H02K3/28 ,  H02P27/06

Abstract: A converter (101) 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 (102) for supplying stator voltages to the stator windings, and a control system (103) 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.