Model predictive control for electrical machines with multiple sets of windings

A computer program for controlling an electrical converter, the electrical converter comprising at least two converter branches connected in parallel to at least two winding systems of an electerical machine, which, when executed by a processor, is configured to;

• determine an average flux reference from a reference torque and an estimated torque, which is determined from measured currents and measured voltages and/or reconstructed voltages in the winding systems;
• determine at least one difference flux reference from at least one difference current reference;
• determine a winding flux reference for each winding system from the average flux reference and the at least one difference flux reference by adding and/or subtracting the at least one difference flux reference to the average flux reference;
• determine switching commands for each converter branch from the winding flux reference and an estimated winding flux for the winding system, which is connected to the respective converter branch, wherein the estimated winding flux is determined from the measured current and the measured voltages and/or the reconstructed voltages in the winding system, and wherein the winding flux reference and the estimated winding flux are provided to a dedicated model predictive controller for the respective converter branch, which determines the switching commands;
• and
• apply the switching commands to each converter branch.

A controller for controlling an electrical converter configured to:

• determine an average flux reference from a reference torque and an estimated torque, which is determined from measured currents and measured voltages and/or reconstructed voltages in winding systems;
• determine at least one difference flux reference from at least one difference current reference;
• determine a winding flux reference for each winding system from the average flux reference and the at least one difference flux reference by adding and/or subtracting the at least one difference flux reference to the average flux reference;
• determine switching commands for each converter branch from the winding flux reference and an estimated winding flux for the winding system, which is connected to the respective converter branch, wherein the estimated winding flux is determined from the measured current and the measured voltages and/or the reconstructed voltages in the winding system, and wherein the winding flux reference and the estimated winding flux are provided to a dedicated model predictive controller for the respective converter branch, which determines the switching commands;
• and
• apply the switching commands to each converter branch.