Dynamic testing characterization of a HEV traction motor

The dynamic testing method, as an alternative to traditional bench testing against a brake, has proven to be a fast, convenient, yet accurate way of characterizing electrical machines. By measuring the speed and the currents and voltages while alternatively accelerating and decelerating the electrical machine it is possible to obtain its torque and flux linkage characteristics dynamically. This article presents the application of the dynamic testing method to the validation of a HEV electric traction machine, comparing the torque and flux linkage characteristics obtained experimentally to those from the Finite Element design simulations. Moreover, a discussion is brought up on the possible reasons for the deviations observed.