High-Fidelity Simulation Modeling of Dual Three-Phase PMSM Drive Based on Partially Linearized Flux Model

초록

This paper presents a high-fidelity flux modeling method for dual three-phase permanent magnet synchronous motors (DTP-PMSMs). Conventional modeling approaches require solving nonlinear four-dimensional inverse functions, which significantly increase the computational burden and are impractical for real-time applications. To address this issue, a partially linearized flux modeling method is introduced based on decomposing the total flux linkage into average and differential components, derived from the rotating dq-axes stator current. In the proposed approach, the flux linkage associated with the average current is modeled using a nonlinear two-dimensional look-up table (LUT) derived from finite element analysis (FEA), while the differential current is approximated through the linearized model. The proposed approach reduces the dimensionality of the flux model and avoids the use of high-order inverse functions. The method captures key physical phenomena such as magnetic saturation and spatial harmonics. The proposed model is validated through simulation and experiments, demonstrating reliable accuracy with reduced computational complexity.