Abstract
This paper presents an observation and control design methodology for a three-phase induction machine using a robust control technique. The state estimation and parameter identification of electrical motor are the main problem of the high-performance industrial application of electric drives. We propose a robust solution for real-time estimation of the rotor flux as well as the rotor speed. Indeed, to achieve a robust performance for the rotor flux observer, a H∞ synthesis technique with pole placement will be used. The observer gain matrix is calculated by solving a convex optimization problem. The proposed solution has been tested and validated by an experimental set-up on a 3 KW squirrel age induction motor.DOI: http://dx.doi.org/10.5755/j01.eee.21.1.5223
Highlights
This paper aims at the study of the simplest and most economical sensorless speed control strategy for induction motor drives
We propose a solution based on linear matrix inequality (LMI) framework, to provide a robust rotor flux observer of the induction motor
The aim of this paper is to design a sensorless vector control for a three-phase induction motor based on a robust state estimation
Summary
This paper aims at the study of the simplest and most economical sensorless speed control strategy for induction motor drives. Two high-performance control schemas are proposed and successfully implemented for the induction machine: direct torque control (DTC) [1] and field-oriented control (FOC) [2], [3]. Both control strategies aim to overcome the coupled structure between the dynamics of the electromagnetic torque and flux, in order to provide the same performance and flexibility of a DC machine [4]. Classical FOC is highly sensitive to parameter disturbances To overcome these drawbacks, many researchers are trying to propose different control schemes over the last three decades. Based on the notion of quadratic H∞ performance, a robust self-gain scheduling observer design method results from the constraint satisfaction stability and takes into account certain performance specifications for all admissible trajectories of the rotor speed
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