Performance Improvement of DTC for Induction Motor-Fed by Three-Level Inverter With an Uncertainty Observer Using RBFN

Abstract

A stable sensorless controller for DTC of induction motor fed by three-level inverter using the Radial Basis Function Network (RBFN) is presented in this paper. The torque ripple can be drastically reduced and low speed performance can be obtained in the DTC system for high performance induction motor drives. However, speed control performance is still influenced by the lumped uncertainties of the system such as parameter variations, external load disturbances, and unmodeled dynamics which make it difficult to obtain an exact mathematical model. In this paper, the lumped uncertainties are estimated on-line by the RBFN. Simulations as well as experimental results are shown to illustrate the performance of the proposed system.

Disturbance/Uncertainty Estimation and Attenuation Techniques in PMSM Drives—A Survey

“…One of the early motivations on developing DOB was to design an online load toque observer in motor drives. Recently, disturbance observation techniques have been extensively investigated as load toque observation, for example, see DOB [23], [24], [32], [85]- [88], ESO [12], [33], [36], [89], generalized proportional integral observer (GPIO) [90], [91], sliding mode disturbance observer (SMDO) [92] and intelligent disturbance observer (IDO) [70], [93], [94] for PMSM ( [12], [23], [24], [32], [33], [36], [92]), IM ( [85], [86], [89]- [91], [93], [94]) and BLDCM ( [87], [88]), respectively.…”

“…For this kind of applications, see DOB [5], [25], [28], [31], [95], SMDO [96], ESO [35], [89], [97], [98], GPIO [90], [91] and IDO [93], [94] applied to PMSM ( [5], [25], [28], [35], [96]), IM ( [89]- [91], [93], [94]), BLDCM ( [95], [97]) and switching reluctance motor ( [98]) to name but just a few.…”

Torque Ripple Reduction in Direct Torque Control of Five-Phase Induction Motor Using Fuzzy Controller with Optimized Voltage Vector Selection Strategy

“…Also, multiphase motor helps reducing the rotor harmonic currents, lowering the dc link current harmonics, reducing the current per phase without increasing the voltage per phase, and having many voltage vectors by increasing the number of phases [1]. Above all, by increasing the number of voltage vectors, it is possible to select an optimal voltage vector for the high performance of the direct torque control (DTC) in five-phase induction motor [2,3].…”

Modeling and Experimental Verification of ANN Based Online Stator Resistance Estimation in DTC-IM Drive

“…Direct torque control (DTC) induction motor (IM) drive is becoming more popular day by day [1,2] due to its robustness and fast dynamic response [3][4][5][6]. Implementation of this control strategy is very simple and also coordinate transformation is not required.…”