Patent ID: 11884341
Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B  H | IPC B

Claim 14:
15. The control system of claim 12, wherein arbitrating between the voltage-based torque limit and the current-based torque limit further comprises the instructions causing the processor to:
determine a first motor current-based q-axis current corresponding to a d-axis current having a predetermined minimum value and corresponding to the motor current limit;
determine a second motor current-based q-axis current corresponding to the d-axis current having a predetermined maximum value and corresponding to the motor current limit;
determine a first voltage limit-based q-axis current corresponding to a d-axis current having a predetermined minimum value and corresponding to the voltage constraint of the DC bus;
determine a second voltage limit-based q-axis current corresponding to the d-axis current having a predetermined maximum value and corresponding to the voltage constraint of the DC bus;
determine one of the first motor current-based q-axis current and the first voltage limit-based q-axis current having a lesser value;
determine one of the second motor current-based q-axis current and the second voltage limit-based q-axis current having a lesser value;
determine the one of the second motor current-based q-axis current and the second voltage limit-based q-axis current having the lesser value corresponding to a different constraint from the one of the first motor current-based q-axis current and the first voltage limit-based q-axis current having the lesser value;
determine a d-axis intersection current value where a q-axis current corresponding to the motor current limit is equal to a q-axis current corresponding to the voltage constraint of the DC bus; and
determine the final torque limit based on the d-axis intersection current value and based on the q-axis current corresponding to each of motor current limit and the voltage constraint of the DC bus.