US 11,938,918 B2
Multi-objective optimization for active power management of synchronous motor drives
Nakul Shah, Saginaw, MI (US); Prerit Pramod, Saginaw, MI (US); and Krishna MPK Namburi, Okemos, MI (US)
Assigned to Steering Solutions IP Holding Corporation, Saginaw, MI (US)
Filed by Steering Solutions IP Holding Corporation, Saginaw, MI (US)
Filed on Oct. 7, 2021, as Appl. No. 17/496,241.
Claims priority of provisional application 63/088,575, filed on Oct. 7, 2020.
Prior Publication US 2022/0105923 A1, Apr. 7, 2022
Int. Cl. B60W 10/08 (2006.01); B60L 15/20 (2006.01)
CPC B60W 10/08 (2013.01) [B60L 15/20 (2013.01); B60L 2240/423 (2013.01); B60W 2710/083 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of controlling operation of an electric machine, comprising:
determining a voltage-based torque limit based on a voltage constraint of a direct current (DC) bus supplying power to an inverter for powering the electric machine;
determining a motor current-based torque limit based on a motor current limit;
determining a supply current-based torque limit based on a supply rating, to supply current to the inverter, of the DC bus;
determining a regenerative current-based torque limit based on a receive rating, to receive current from the inverter, of the DC bus;
determining a final torque limit based on the voltage-based torque limit, the motor current-based torque limit, the supply current-based torque limit, and the regenerative current-based torque limit;
determining a limited command torque based on a torque command and the final torque limit; and
calculating at least one current command based on, at least, the limited command torque.