Research on Calculation of Iron Losses of In-wheel Motor for Special Vehicle
Iron loss occupies a large proportion of the losses of in-wheel motor for special vehicle,which directly affects the efficiency and temperature rise of the drive system.In order to accurately calculate the iron loss,time-stepping finite element analysis is adopted to analyze the flux density waveforms at different regions of the stator core by taking the in-wheel motor with rated power of 70 kW for example.Harmonic analysis of radial and tangential flux density waveforms at different regions of the stator core is carried out.The impact of rotating magnetic field and harmonic component on the stator iron loss is further studied.Three different iron loss calculation methods are adopted to calculate the stator iron loss after the flux density waveforms and harmonic analysis are carried out.The stator iron loss values separated from the efficiency and loss test of the in-wheel motor are compared with the calculation values of different calculation methods.The results show that the calculation method in consideration of the effect of rotating magnetic field and harmonic component has the highest accuracy and its calculation result is the closest to the test result,which verifies the validity of the calculation method.
special vehiclein-wheel motortime-stepping finite element analysisiron lossrotating magnetic field
NETL
NSTL
万方数据
