• Title/Summary/Keyword: MRAS(Model Reference Adaptive System) observer

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Induction Motor Speed Controlf MRAS-Based Load-Torque Observer (모델 기준 적응 시스템(MRAS) 부하 토크 관측기를 이용한 유도 전동기의 속도 제어)

  • Cho, Moon-Taek;Lee, Chung-Sik;Lee, Se-Hun
    • Journal of the Institute of Convergence Signal Processing
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    • v.8 no.2
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    • pp.119-123
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    • 2007
  • This paper investigates a speed sensorless control of induction motor. The control strategy is based on MRAS(Model Reference Adaptive System) using load-torque observer as a reference model for flux estimation. The speed response of conventional MRAS controller characteristics is affected by variations of load torque disturbance. In the proposed system, the speed control characteristics using a load-torque observer control isn't affected by a load torque disturbance. Control algorithm that propose whole system through MATLAB SIMULINK because do modelling simulation result are presented to prove the effectiveness of the adaptive sliding mode controller for the drive variable load of induction motor. Therefore we hope to be extended in industrial application.

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A Speed Control of Sensorless Induction Motor using Direct Torque Control (직접 토오크 제어를 이용한 센스리스 유도전동기의 속도제어)

  • 박건우;고태언;하홍곤
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2001.11a
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    • pp.181-185
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    • 2001
  • This paper presents a digitally speed sensorless control system for induction motor with direct torque control (DTC). The drive is based on Mode1 Reference Adaptive System (MRAS) using state observer as a reference model fat flux estimation. The system are closed loop stator flux and torque observer for wide speed range that inputs are currents and voltages sensing of motor terminal, model reference adaptive control (MRAS) with rotor flux linkages for the speed turning aignal at low speed range, two hysteresis controllers. The Proposed system is verified through simulation.

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Sensorless Vector Control of Induction Motors for Wind Energy Applications Using MRAS and ASO

  • Jeong, Il-Woo;Choi, Won-Shik;Park, Ki-Hyeon
    • Journal of Electrical Engineering and Technology
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    • v.9 no.3
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    • pp.873-881
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    • 2014
  • Speed sensorless modes of operation are becoming standard solution in the area of electric drives. This paper presents flux estimator and speed estimator for the speed sensorless vector control of induction motors. The proposed sensorless methods are based on the model reference adaptive system (MRAS) observer and adaptive speed observer (ASO). The proposed speed estimation algorithm can be employed in the power control of grid connected induction generator for wind power applications. Two proposed schemes are verified through computer simulation PSIM and compared their simulation results.

The Control of Switched Reluctance Motor Using MRAS without Speed and Position Sensors (MRAS 관측기를 이용한 SRM의 속도 및 위치센서없는 제어)

  • Yang, Lee-U;Kim, Jin-Su;Kim, Yeong-Seok
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.48 no.11
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    • pp.632-639
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    • 1999
  • SRM(Switched Reluctance Motor) drives require the accurate position and speed information of the rotor. These informations are generally provided by a shaft encoder or resolver. High temperature, EMI, and dust may make detection performance deteriorate. Therefore, the elimination of the position and speed sensor is desirable. In this paper, a nonlinear adaptive observer using the MRAS(Model Reference Adaptive System) is proposed. The rotor speed and position are estimated by the adaptation law using the real and estimated currents. The stability of the adaptive observer is proved by Lyapunov stability theory. The proposed methods are implemented with TMS320C31 DSP. Experimental results prove that the observer has a good estimation performance of the rotor speed and position despite of the parameter variations and loads, and the speed control can be accomplished in the wide speed range.

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Induction Motor Speed Control of MRAS-Based Load-Torque Observer (모델기준적응시스템(MRAS) 기반의 부하토크관측기를 이8한 유도전동기 속도제어)

  • Kim, E.G.;Lee, H.G.;Lee, S.H.;Oh, B.H.;Chung, C.B.;Hahm, N.G.;Jeon, K.Y.;Lee, S.H.;Han, K.H.
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.1004-1005
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    • 2006
  • This paper investigates a speed sensorless control of induction motor. The control strategy is based on MRAS (Model Reference Adaptive System) using load-torque observer as a reference model for flux estimation. The speed response of conventional MRAS controller characteristics is affected by variations of load torque disturbance. In the proposed system, the speed control characteristics using a load-torque observer control isn't affected by a load torque disturbance. Simulation results are presented to prove the effectiveness of the adaptive sliding mode controller for the drive variable load of induction motor.

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A Novel MRAS Based Sensorless Speed Control of Induction Motor (새로운 MRAS에 의한 유도전동기의 센서리스 속도제어)

  • Jin, Dae-Won;Gwon, Yeong-An
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.48 no.3
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    • pp.124-130
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    • 1999
  • Speed and position sensors require the additional mounting space, reduce the reliability in harsh environments and increase the cost of motor. Various control algorithms have been proposed for the elimination of speed senor. This paper investigates a novel speed sensorless control of induction motor. The proposed control strategy is based on MRAS(Model Reference Adaptive System) using state observer as a reference model for flux estimation. This algorithm may overcome several shortages of conventional MRAS: integrator problems, small EMF at low speed and relatively large sensitivity to resistance variation. The proposed algorithm is verified through simulation and experiment.

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Inertia Estimation for a PM Synchronous Motor Based on MRAS(Model Reference Adaptive System) Observer (MRAS(Model Reference Adaptive System)를 이용한 영구자석동기전동기의 관성 추정)

  • Song, Ki-Young;Cho, Kwan-Yuhl;Kim, Hag-Wone;Lim, Byung-Kuk
    • Proceedings of the KIPE Conference
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    • 2013.11a
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    • pp.179-181
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    • 2013
  • 일반적인 전동기 구동에 있어서 부하의 변화에 의해 관성이 변하는 경우 동일 속도 제어기 이득에서의 속도 응답은 오버슈트가 생기거나 진동하는 문제점이 있다. 따라서 정확한 속도제어가 필요한 응용분야에서 전동기의 관성 추정은 필수이다. 본 논문에서는 MRAS 관측기를 활용하여 영구자석동기전동기의 관성을 추정하고 추정된 관성으로 속도제어기의 제어이득을 선정할 경우의 속도 응답특성을 비교한다.

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Sensorless Control of Induction Motor Drives Using an Improved MRAS Observer

  • Kandoussi, Zineb;Boulghasoul, Zakaria;Elbacha, Abdelhadi;Tajer, Abdelouahed
    • Journal of Electrical Engineering and Technology
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    • v.12 no.4
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    • pp.1456-1470
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    • 2017
  • This paper presents sensorless vector control of induction motor drives with an improved model reference adaptive system observer for rotor speed estimation and parameters identification from measured stator currents, stator voltages and estimated rotor fluxes. The aim of the proposed sensorless control method is to compensate simultaneously stator resistance and rotor time constant variations which are subject of large changes during operation. PI controllers have been used in the model reference adaptive system adaptation mechanism and in the closed loops of speed and currents regulation. The stability of the proposed observer is proved by the Lyapunov's theorem and its feasibility is verified by experimentation. The experimental results are obtained with an 1 kW induction motor using Matlab/Simulink and a dSPACE system with DS1104 controller board showing the effectiveness of the proposed approach in terms of dynamic performance.

A High-Performance Speed Sensorless Control System for Induction Motor with Direct Torque Control (직접 토크제어에 의한 속도검출기 없는 유도전동기의 고성능 제어시스템)

  • Kim, Min-Huei;Kim, Nam-Hun;Baik, Won-Sik
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.51 no.1
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    • pp.18-27
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    • 2002
  • This paper presents an implementation of digital high-performance speed sensorless control system of an induction motor drives with Direct Torque Control(DTC). The system consists of closed loop stator flux and torque observer, speed and torque estimators, two hysteresis controllers, an optimal switching look-up table, IGBT voltage source inverter, and TMS320C31 DSP controller board. The stator flux observer is based on the combined current and voltage model with stator flux feedback adaptive control for wide speed range. The speed estimator is using the model reference adaptive system(MRAS) with rotor flux linkages for speed turning signal estimation. In order to prove the suggested speed sensorless control algorithm, and to obtain a high-dynamic robust adaptive performance, we have some simulations and actual experiments at low(20rpm) and high(1000rpm) speed areas. The developed speed sensorless system are shown a good speed control response characteristic, and high performance features using 2.2[kW] general purposed induction motor.

A High-Performance Position Sensorless Motion Control System of Induction Motor with Direct Torque Control (직접 토크제어에 의한 위치검출기 없는 유도전동기의 고성능 모션제어 시스템)

  • Kim, Min-Hoe;Kim, Nam-Hun;Baek, Won-Sik
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.51 no.7
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    • pp.399-405
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    • 2002
  • This paper presents an implementation of digital high-performance Position sensorless motion control system of an induction motor drives with Direct Torque Control(DTC). The system consist of closed loop stator flux and torque observer, speed and torque estimators, two hysteresis controller, optimal switching look-up table, IGBT voltage source inverter, and TMS320C31 DSP board. The stator flux observer is based on the combined current and voltage model with stator flux feedback adaptive control of which inputs are current and voltage sensed on motor terminal for wide speed range. The speed observer is using the model reference adaptive system(MRAS) with rotor flux linkages for speed turning signal. The simulation and experimental results are provided to evacuate the consistency and the performance of the suggested position sensorless control algorithm. The developed position sensorless system are shown a good motion control response characteristic and high performance features using 2.2[kw] general purposed induction motor.