An Instantaneous Torque Model and the Practical Caculation Method for Permanent Magnet Synchronous Machines

This paper introduces an instantaneous torque model for permanent magnet synchronous machines(PMSMs). Compared to the previous studies, we denotes the torque directly with the flux linkages and currents to fully consider the magnetic saturation based on the actual ABC windings. An approximation calculation method is adopted to resolve the torque model. Then an in-wheel motor is established in the finite element method software to compare our original torque model with the previous study. The simulation results presented demonstrate not only the accuracy of the instantaneous torque model but the feasibility of our calculation method as well.