Adaptive Fuzzy Controller Based Self Regulated Reference Stator Flux Estimator of Direct Torque Control for Three Level Inverter Fed IPMSM

Abstract

The paper suggests a new direct torque control approach for Interior Permanent Magnet Synchronous Machine (IPMSM) with adoption of space vector modulation topology based three level inverters (TH-LI).The proposed control strategy is critically evaluated and compared with Conventional DTC (CDTC) of drive that it is utilized the Fuzzy Logic Controller (FLC) as speed feedback loop controller for each drive through Simulink/MATLAB Platform. The key idea for the proposed control strategy is incorporated by Self Regulated Reference Stator Flux (SRRSF) estimator which is implemented with the error signal of torque regulator and reference stator flux. Further, the SRRSF estimator is interfaced with Adaptive Fuzzy Logic Interfacing System Controller (AFLISC). In order to investigate the effectiveness of the proposed technique, the steady state and dynamic state responses under variable motor speed with variable load is performed. The obtained simulation results are affirmed that the torque and stator flux ripples are significantly minimised for entire speed range. However, the torque and flux ripples of proposed DTC is compared numerically with CDTC that an average ripple reduction of 79.9% for torque and 62.47% for flux under load conditions is found. Thus, the performance of aforementioned proposed control strategy of IPMSM drive is demonstrated that the drive achieved high and accurate control of torque under the steady and dynamic state conditions.

An enhanced control strategy based imaginary swapping instant for induction motor drives

“…In addition, an efficient DTC control strategy based on adaptive artificial neural network (ANN) for electrical motor was presented in [12], [13]. An optimized strategy based on fuzzy logic controller was performed in [14]. The model predictive strategy has a part in the literature in many areas of research and development [15]- [17].…”