Analysis of interior permanent magnet synchronous motor with modified direct torque control using fuzzy logic controller

摘要

This paper deals with the novel modified direct torque control (MDTC) scheme based on space vector modulation for an interior permanent magnet synchronous motor( IPMSM) drive. Space vector modulation is used to find the optimal switching sequence of the inverter with respect to torque and flux demand of the drive. The complete system is modelled using Matlab/ Simulink. In the proposed MDTC, the torque and flux ripples are minimised using PI and Fuzzy Logic Controllers. The comparative results show that the Fuzzy Logic Control (FLC) adopted here is more robust. In both the controllers the speed momentarily follows with load disturbances and immediately within no time reaches to the reference value. Also it is observed from performance indices analysis the torque and flux errors are less with fuzzy logic controller and, hence, found to be a suitable replacement of the PI controller for the high performance industrial drive applications.