Sensorless control of Five level inverter fed Fuzzy Logic based DTFC SVM Controlled PMSM drive using Luenberger Observer

In this paper, sensorless control of Five-Level Diode Clamped Inverter (5L-DCI) fed fuzzy logic speed controller based Direct torque and flux control(DTFC) scheme of Permanent magnet synchronous motor using Luenberger observer is studied. Design of Full order Luenberger observer using the Fourth order Back emf model of PMSM in stationary frame is also presented. Fuzzy logic based speed controller along with the space vector pulse width modulation of 5L-DCI is realized to reduce the torque ripples, faster response for load and speed dynamics and reduced switching losses in the inverter. Simulation outcomes are shown to assess the performance of the control scheme and stability of designed Luenberger Observer.