FEA-Based Mathematical Modeling and Simulation for IPMSM Drive with Consideration of Saturation and Cross-Coupling Influence

Abstract

This paper proposes a high-precision mathematical modeling scheme for interior permanent magnet synchronous motors (IPMSMs), which gives full consideration to the saturation and cross-coupling influence based on the finite element analysis (FEA). Firstly, the IPMSM model is built in ANSYS/Maxwell to acquire the variable stator inductance and flux linkage parameters under various kinds of working conditions. Secondly, the obtained d-axis inductance, q-axis inductance, and rotor flux linkage are further calculated, processed, and pre-stored in three two-dimensional (2-D) look- up-tables (LUTs). Thirdly, the IPMSM model is built in MATLAB/Simulink based on three established tables. Finally, by looking up the three tables according to the real-time d-axis and q-axis currents, the IPMSM system can be simulated under different working conditions for various control methods. With the developed high-precision FEA-based mathematical modeling scheme, the simulation results will be more accurate and the simulation process will be more efficient with significant time savings and better dynamic performance. To validate the effectiveness of the proposed modeling scheme, a Space Vector Pulse Width Modulation (SVPWM) control system with maximum torque per ampere (MTPA) and flux-weakening (FW) control as well as feed-forward decoupling control is built based on a 15kW IPMSM prototype.