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AssigneeDanfoss Editron Oy
InventorsAntti Tarkiainen, Juha Toikka, Tapani Siivo, Mikko Piispanen, Mika Björkholm
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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.
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 having less series connected turns than the low-speed configuration, the converter comprising:
A method for driving an electric machine whose stator windings are changeable to be in a low-speed configuration or in a high-speed configuration having less series connected turns than the low-speed configuration, the method comprising:
A non-transitory computer program for driving an electric machine whose stator windings are changeable to be in a low-speed configuration or in a high-speed configuration having less series connected turns than the low-speed configuration, the non-transitory computer program comprising computer executable instructions for controlling a programmable processing system to:
Dependencies are inferred from the claim text.