Online Stator and Rotor Resistance Estimation Scheme Using Sliding Mode Observer for Indirect Vector Controlled Speed Sensorless Induction Motor

Abstract

Recently, many works have been made to improve the performance of sensorless induction motor drives. However, parameter variations and low-speed operations are the most critical aspects affecting the accuracy and stability of sensorless drives. This work presents a sensorless vector control scheme consisting of the first hand of a velocity estimation algorithm that overcomes the need for sensor velocity and secondly a robust variable structure control law that compensates for the uncertainties present in the system. Simulation results confirm the efficacy of the proposed approach.

Novel Approaches in Sensorless Induction Motor Drive for Industrial Applications

“…In recent years, a many of researches have been done on speed and flux observer of IM sensorless drive system, mainly includes: Advanced Model Reference Adaptive System (MRAS) [1,19,21,24], Full Order Flux Observer [3], Artificial Neural Estimator [7], Variable Frequency Injection Method [11], Fuzzy Logic Observer [8], Virtual Current Sensor [9], sliding mode observer [13],Extended Current Estimator [6]. Improved Speed Sensorless Vector Control Algorithm [12] and Genetic Algorithm [15] etc.…”

“…A sliding mode observer for rotor flux observation was presented in [3,13]. In recent years use of sensorless induction motor drives rapidly increasing.…”

“…But sensorless induction motor drives are very sensitive to the stator and rotor resistances they changes with temperature and skin effects, it is clear that when these parameters varies, decoupling between the flux and torque components of stator currents is lost and therefore the effective performance of the machine weakens. However, when a very high accuracy is desired, to improve the performance of speed estimation low speeds, this paper [13] proposes a method for both rotor speed identification with stator and rotor resistance estimation in sensorless induction motor drives based on sliding mode observer. Sliding-mode observer control techniques are based on the theory of systems with variable structure in which the gain corrector term of the observer contains the discontinuous function.…”

“…The basic structure of full-order flux observer [3]Since this method is a model-based method, it cannot be applied to get stable operation for a long time when the stator current frequency is zero.c. Sliding Mode ObserverA sliding mode observer for rotor flux observation was presented in[3,13]. In recent years use of sensorless induction motor drives rapidly increasing.…”

Asenkron Motorun Çalışma Parametrelerinin SCADA ile İzlenmesinin Tasarımı

“…Cherif ve Miloud yaptıkları çalışmada sensör hızı ihtiyacını aşan bir hız tahmin algoritmasının ilk elden ve ikincisi sistemde mevcut belirsizlikleri telafi eden güçlü değişken yapı kontrol yasalarından oluşan sensörsüz bir vektör kontrol şeması sunmaktadır. Endüksiyon motorunun hız sensörsüz kontrolü için rotor hızı ile rotor ve stator direnci arasındaki eşzamanlı tahmini önermektedirler (Cherifi & Miloud, 2019). Atkinso ve ark.…”