The purpose of this paper is to propose a hybrid calculation method to efficiently estimate flux density harmonics caused by Pulse Width Modulation (PWM), which is suitable for conventional and unconventional Permanent Magnet Synchronous Machines (PMSMs).
First, the principle and modeling of PMSM are recalled. Secondly, realizing hybrid calculation is divided into two main steps: calculating the harmonic currents from PWM voltage sources in the analytical model based on electrical circuits; and importing the harmonic currents into the static and linear magnetic model with frozen permeability to calculate flux density harmonics. Finally, a validation by comparison to a transient finite element approach simulation shows the reliability and accuracy of the proposed hybrid method.
This hybrid calculation can provide accurate results and significantly reduce computation time from several hours to minutes when estimating high-frequency harmonic flux densities in conventional or unconventional PMSMs.
This paper presents a universal hybrid computational method for the rapid calculation of magnetic flux harmonics because of PWM, applicable to both conventional and unconventional PMSMs.
