نتایج جستجو برای: stator resistance estimation

تعداد نتایج: 639428  

2016
Juggrapong Treetrong Jyoti K. Sinha Fengshu Gu Andrew Ball

This paper presents parameter identification technique to quantify the faults in motor condition monitoring. Genetic Algorithm (GA) has been used as a key technique to estimate the motor parameters. The zero-sequence voltage equation for the stator has been used as a model to estimate motor stator parameters – the stator resistance and the stator leakage inductance. The comparison of the parame...

2012
Xiaoliang Jiang Zhongying Zhang Pindong Sun Z. Q. Zhu

Abstract—This paper proposed an estimation approach of temperature rise in stator winding and rotor magnet of a surfaced-mounted permanent magnet (PM) AC motor. By using the 3rd-order extended Kalman filter (EKF) algorithm in rotating reference frame, stator winding resistance and rotor PM flux-linkage can be estimated independently. After comparing the estimation results of resistance and flux...

2010
Mustafa AKTAŞ H. İbrahim OKUMUŞ

Torque control of induction motors (IM) requires accurate estimation of the flux in the motor. But the flux estimate, when estimated from the stator circuit variables, is highly dependent on the stator resistance of the IM. As a result, the flux estimate is prone to errors due to variation in the stator resistance, especially at low stator frequencies. In this paper, an Artificial Neural Networ...

Journal: :Simulation Modelling Practice and Theory 2010
Vimlesh Verma Suman Maiti Chandan Chakraborty

A speed estimation method is presented in this paper for a grid-connected doubly-fed slipring induction machine drive. The proposed method is formulated with reactive power based model reference adaptive system (MRAS). The method does not require the estimation of stator/rotor flux. So, the integrator related problems at synchronous speed are overcome. Also, the estimation method is independent...

2008
M. Zaky M. Khater H. Yasin S. S. Shokralla

Recently, speed sensorless control of induction motor drives received great attention to avoid the different problems associated with direct speed sensors. However, low speed operation with robustness against parameter variations remains an area of research for sensorless systems. Stator resistance is of greatest importance for good operation of speed sensorless systems in low speed region. In ...

Journal: :IEEE Trans. Industrial Electronics 2002
Seok Ho Jeon Kwang-Kyo Oh Jin Young Choi

This paper proposes an adaptive flux observer for induction motors, where stator and rotor resistances are estimated in online environments. The variation of motor parameters during operation degrades the performance of the controller and the flux observer. Among the parameters of induction motors, rotor resistance is a crucial one for flux estimation, and stator resistance also becomes critica...

2005
Samira Benaicha Fatiha Zidani Rachid Nait Said Mohamed-Said Nait-Said

Direct torque control (DTC) minimizes the use of machine parameters [1, 2]. Among all methods of torque control in induction motor, direct torque control (DTC) seems to be particularly interesting being independent of machine rotor parameters and requiring no speed or position sensors [3, 4, 5]. In spite of its simplicity, DTC is capable of generating fast torque responses. In DTC the torque an...

2008
Chao Yang J. W. Finch

− The Model Reference Adaptive System (MRAS) is probably the most widely applied speed sensorless drive control scheme. This paper compares induction motor speed estimation using conventional MRAS and AI-based MRAS with Stator Resistance Compensation. A conventional mathematical model based MRAS speed estimation scheme can give a relatively precise speed estimation result, but errors will occur...

2007
PETR BLAHA

Stator resistance identification algorithm for AC induction motor is presented in this paper. It does not require additional external excitation. The algorithm is intended to capture slow variations of stator resistance which are given by the changes in stator windings temperature. Steady state operation with harmonic voltages and currents are located during the operation of the motor and the s...

2016
V. Naveen

This project presents a method of improving the speed profile, torque and flux using stator estimation method. This discusses the problems associated with the error in stator Resistance and proposes an analytical approach to investigate its effect on the actual and estimated variables of a induction motor. Based on how this error affects the estimated angle between the stator flux and current v...

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