Speed control of the interior permanent magnet synchronous motor over a wide range using Fuzzy Logic Controller

This paper presents a Fuzzy Logic Controller (FLC) scheme for speed control of an interior permanent magnet synchronous motor (IPMSM) drive over a wide speed range. The proposed FLC is designed based on maximum torques per ampere operation below the rated speed and the field weakening operation above the rated speed, respectively. The main features of the proposed scheme using a fuzzy controller to control both flux and torque simultaneously, in whole speed range. The effectiveness of the proposed FLC is investigated for a 40kW IPMSM and simulated using MatLab/Simulink. The simulation results are compared to those obtained from the conventional PI controller base drive at various conditions such as: step change of command speed and load torque, the disconnection of one phase and parameter variations. Simulation results demonstrate the appropriate dynamic response, robustness again changes, capability in removing load disturbances, without overshoot and undershoot, minimum settling time and lowest steadystate error of the proposed controller over a wide speed range.