Patent ID: 11870374
Assignee: VOLVO TRUCK CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A method for adapting control parameters of an electric traction machine being a permanent magnetic synchronous motor, PMSM, the method comprising:
providing a flux linkage of permanent magnets (PM flux) in the PMSM by decoupling the PMSM from drive shaft and performing a first retardation test to measure the flux linkage of the permanent magnets (PM flux) in the PMSM;
performing a stand still characterisation of the PMSM to estimate linked magnetic flux as a function of current;
adding the PM flux to the estimated linked magnetic flux to provide a flux characteristic of the PMSM;
adapting the control parameters of the PMSM based on the flux characteristic.