Abstract: A method for adapting the control parameters of an electric traction machine being a permanent magnetic synchronous motor, PMSM, the method comprising providing 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.

Abstract: A method performed by a control unit for determining an indication of whether three phase cables are correctly or erroneously connected between power electronics and an electrical machine comprised in an at least partly electrically operated vehicle or vessel. The control unit triggers generation of a current vector in the electrical machine from a voltage vector. The voltage vector has a voltage angle. When the current vector has a reached a current amplitude reference, the control unit obtains a current angle of the current vector and signs of derivatives of the voltage angle and the current angle. Based on the signs of derivatives, the control unit determines an indication of whether or not the phase cables are correctly or erroneously connected.

Abstract: A method for adapting the control parameters of an electric traction machine being a permanent magnetic synchronous motor, PMSM, the method comprising providing 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.

Abstract: A method for categorizing performance of a PMSM coupled to a drive shaft, and powered by a battery via an inverter. The method comprising: decoupling the PMSM from drive shaft; performing a first retardation test to measure the flux linkage of the permanent magnets, PM flux, in the PMSM; performing a second retardation test in which the inverter is disconnected, to measure the no-load power losses of the PMSM; correlating the PM flux with the no-load power losses in a health parameter of the PMSM, and comparing the health parameter with reference data of known health parameters of a population of PMSMs; categorizing the performance of the PMSM based on the compared health parameter.