Results 251 to 260 of about 2,619 (292)

A Novel Speed Observer Based on Parameter-optimized MRAS for PMSMs

2008 IEEE International Conference on Networking, Sensing and Control, 2008
Nowadays, many efforts are made to realize the position/speed sensorless control strategy of permanent magnet synchronous motors (PMSM) to simplify the control structure and cut down the cost. A sensorless control scheme based on a model reference adaptive system (MRAS) with the theory of parameter optimization for the PMSM servo system is described in
Fu Zhou, Jianguo Yang, Beizhi Li
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A MRAS observer applied to sensorless doubly fed induction machine drives

2010 IEEE International Symposium on Industrial Electronics, 2010
The paper deals with a novel MRAS observer for the sensorless control of a Doubly Fed Induction Machine. In the proposed MRAS, an expression of the electromagnetic torque and the norm of the rotor current space vector are exploited to form the reference model.
CARMELI, MARIA STEFANIA, CASTELLI DEZZA, FRANCESCO, IACCHETTI, MATTEO FELICE, PERINI, ROBERTO   +3 more
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Design of MRAS-based observer in speed sensorless induction motor drive

2009 4th IEEE Conference on Industrial Electronics and Applications, 2009
This paper deals with the design of MRAS-based observer in speed sensorless induction motor drive. The option of reference coordinate of current model is focused on, for there exists an unstable region when the model is expressed in discrete form. An option of voltage model and current model in stationary and synchronous coordinate respectively, is ...
null Deng Xin, null Zhao Jin, null Luo Hui, null Wang Qingyi   +3 more
openaire   +1 more source

Advanced speed sensorless control strategy for induction machine based on neuro-MRAS observer

Materials Today: Proceedings, 2021
Abstract High-performance field-oriented motor control requires accurate knowledge of flux and speed information. Furthermore, the elimination of sensors leads to reduced overall cost and size of the electric drive system and subsequently improving its reliability.
Weam El Merrassi, Abdelouahed Abounada, Mohamed Ramzi   +2 more
openaire   +1 more source

Sensorless control of PMSMs based on parameter-optimized MRAS speed observer

2008 IEEE International Conference on Automation and Logistics, 2008
A scheme of a model reference adaptive system (MRAS) based on the theory of parameter optimization for the PMSM servo system is described in this paper. The scheme can promptly work out the speed of the rotor without any other position/speed sensor. Different from the other MRAS-based speed observers which constructed according the theory of stability ...
null Ruzhong Yan, null Beizhi Li, null Fu Zhou   +2 more
openaire   +1 more source

Sliding mode observer-based MRAS for direct torque control of induction motor

2015 IEEE Conference on Energy Conversion (CENCON), 2015
This paper proposes a sensorless sliding mode observer based model reference adaptive system applied to a direct torque control of the induction motor drive. The reference model is a sensorless sliding mode observer and the adaptive model is a typical current model.
Y.A. Alamri, N.R.N. Idris, I. M. Alsofyani   +2 more
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Sensorless rotor position based on MRAS observer for doubly fed induction generator

2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC), 2015
In this paper is proposed the application of the model reference adaptive system (MRAS) observer for rotor position estimation for controlling the doubly fed induction generator (DFIG), operating in balanced and unbalanced voltage sags. The rotor position is required for the transformation of variables.
Rogerio Vani Jacomini, Edson Bim
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A MRAS Observer for Sensorless Operation of Grid-Connected BDFRG Wind Turbines

2020 IEEE 29th International Symposium on Industrial Electronics (ISIE), 2020
A novel rotor speed and position observer for sensor-less vector control of a brushlesss doubly fed reluctance generator (BDFRG) is put forward in this paper. Implementing such an estimation technique would eliminate the need for a shaft encoder, improving so the reliability and reducing the maintenance costs in wind power applications, off-shore in ...
M. R. Agha Kashkooli, Milutin G. Jovanovic   +1 more
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Speed sensorless IM control system based on MRAS and NN flux observers

2010 3rd International Conference on Advanced Computer Theory and Engineering(ICACTE), 2010
Many electronic drivers for the induction motor control are based on sensorless technologies. This paper proposes a novel hybrid motion sensorless control system to solve the low speed problems using MRAS and NN estimation scheme which is based on rotor flux. A multilayer feedforward artificial neural network is proposed for rotor flux estimation which
null Li Yi, null Han Mei
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Direct estimation of stator flux by a MRAS observer in sensorless application

2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC), 2017
The stator flux estimation is the framework of direct torque control technique (DTC) method. The accurate estimated flux grantees the desirable sensorless drive function. There are different methods for flux estimation that the voltage model is simplest ones.
Bahareh Zarei, Seyed Alireza Davari
openaire   +1 more source