Authors : Tamilarasi P.; Subramoniyan N.; Mahesh Babu M.

Volume/Issue : Volume 11 - 2026, Issue 7 - July

Google Scholar : https://tinyurl.com/3f3p7yxc

Scribd : https://tinyurl.com/42n37wxr

DOI : https://doi.org/10.38124/ijisrt/26jul1248

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Abstract : Accurate prediction of inverter losses in Permanent Magnet Synchronous Motor (PMSM) drives is difficult because conduction, switching, and diode recovery behaviors vary significantly with instantaneous current, voltage, and device temperature. Existing analytical methods often rely on fixed semiconductor parameters and averaged current assumptions, which limit their ability to represent dynamic operating conditions in practical electric-drive systems. This work develops a detailed inverter loss and thermal evaluation framework in PSIM 2025.1, combining thermally enabled MOSFET and diode models with nonlinear PMSM characteristics. The approach captures temperature-dependent on-state resistance, voltage–current overlap during switching transitions, and diode reverse-recovery effects while operating under Field-Oriented Control (FOC). The overall inverter losses and efficiency are evaluated across a wide range of torque–speed operating points. Simulation results demonstrate PSIM’s capability for practical and accurate inverter loss prediction, offering valuable insights for the design and optimization of PMSM drive systems in electric vehicle and industrial applications.

Keywords : Inverter Loss, PMSM, Field-Oriented Control (FOC), Thermal Modeling, Switching and Conduction Loss, Inverter Efficiency Analysis, PSIM.

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