Mengesha Mamo (PhD)Netsanet Abate2026-03-032026-03-032025-06https://etd.aau.edu.et/handle/123456789/7801This thesis presented an Interior Permanent Magnet Synchronous Motor (IPMSM) drive system with a sliding mode-based Maximum Torque per Ampere (MTPA) and wide-speed range (field weakening) control. It developed and analysed an IPMSM motor dynamic model, empowering motor control in both constant-torque (constant flux) and wide-speed range (constant-voltage-ampere) modes. The control performance of the IPMSM varied due to temperature changes and magnetic saturation, so a sliding mode-based MTPA controller with a First-Order Sliding Mode Controller (SMC) was used to address model uncertainty and external disturbances. The scheme eliminated steady-state error using an Integral Sliding Mode Controller (I_SMC). MATLAB simulations were performed to validate the proposed controlleren-USInterior permanent magnet Synchronous Motor (IPMSM)Maximum Torque Per Ampere (MTPA)Wide speed range controlField Weakening (FW)Sliding Mode Controller (SMC).Thesis