Model-based broken rotor bar detection on an IFOC driven squirrel cage induction motor

Rodriguez-Cortes, H.; Hadjicostis, Christoforos N.; Stanković, A.M.

doi:10.23919/acc.2004.1384384

Cited by 17 publications

(7 citation statements)

References 9 publications

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“…Broken rotor modelling methods has been reported in [6] and [14][15][16][17][18]. Authors have considered feasibility of using T transformation proposed in [18], where rotor current was modified to calculate torque pulsation in open-loop model and diagnose rotor fault.…”

Section: Rotor Fault Modellingmentioning

confidence: 99%

“…Closed loop and sensorless control with fault machine require exact model of asymmetric machine with space vector representation. Rotor fault detection method in FOC driven induction machine has been proposed in [5] and [6]. Model-based detection methods are not popular due to nonlinear and nonstationary model of the machine that requires estimation of parameters.…”

Section: Introductionmentioning

confidence: 99%

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Broken rotor bar impact on the closed loop and sensorless control of induction machine

Kołodziejek

Bogalecka²

2008

2008 13th International Power Electronics and Motion Control Conference

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This paper presents analysis of closed loop and sensorless control of induction machine with broken rotor bar for on-line diagnostics purposes. Closed loop control system synthesis of induction motor is based on symmetrical model of the machine. In case of induction machine operation with broken rotor bars, rotor speed pulsation is compensated by the control system. Simulation of Multiscalar Control with the fault machine shows that decoupling variables can be used as detection signals. Analysis of speed observer frequency response in open loop operation gives information about disturbance impact on estimation error. Further analysis indicates that machine asymmetry can affect stability of sensorless control system with speed observer.

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Section: Rotor Fault Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Broken rotor bar impact on the closed loop and sensorless control of induction machine

Kołodziejek

Bogalecka²

2008

2008 13th International Power Electronics and Motion Control Conference

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“…Modelling of the asymmetric IM drive, multiscalar control system and speed observer structure taken into consideration in this paper has been reported in Krzemiński (2001Krzemiński ( , 2006. Investigation of the rotor asymmetry in IFOC and FOC control system were reported in Cruz and Cardoso (2007) and Rodriguez-Cortes et al (2004). This paper presents analysis of rotor asymmetry focused on control system variables and state variables.…”

Section: Introductionmentioning

confidence: 99%

State and control system variables sensitivity to rotor asymmetry in the induction motor drive

Kołodziejek

2012

COMPEL

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Purpose -The aim of this paper is to undertake analysis and comparison of the closed-loop and sensorless control systems sensitivity to the broken rotor for diagnostic purposes. For the same vector control system induction motor drive analysis concerning operation with the asymmetric motor, broken rotor fault handling and operation were investigated. Reliability, range of stable operation, fault symptoms and application of diagnosis methods based on control system variables utilization was analyzed. Design/methodology/approach -Induction motor drive vector control system synthesis was applied using the multiscalar variables of the machine model with nonlinear feedback linearization applied to use classical cascaded PI controllers for the speed-torque and flux decoupled control. Speed observer was applied for the rotor flux and rotor speed estimation for the sensorless control system synthesis.Findings -Relative sensitivity of the state and control system variables to broken rotor fault based on experimental results for the closed-loop and sensorless control systems is presented and compared. Drawbacks of using the MCSA analysis for the rotor fault diagnosis in the closed-loop and sensorless control systems are pointed. Advantages and drawbacks of the state space estimators filtering characteristics in the sensorless control system are described. Practical implications -Asymmetric IM motor drive handling and diagnosis. Broken rotor range diagnosis inconsistency using the popular MCSA method should be considered in the closed-loop and sensorless control system of the induction motor drive. Depending on the IM motor drive application and the operation requirements the results can be used for asymmetric machine proper handling, choosing proper control system structure and control system variables for rotor fault early diagnosis. Originality/value -Sensitivity of the state and control system variables to broken rotor fault based on experimental results for the closed-loop and sensorless control systems is presented, which implies motor handling procedures and fault diagnosis. IntroductionSensorless controlled induction motor drives are more and more popular in industrial applications, particularly in the renewable energy processing, i.e. wind power plants, small water power plants and electric vehicles. Nowadays electric drives need to provide additional functions besides their primary task. One of them is on-line diagnostics during normal operation and on-line drive state estimation. Increasing computational power of the DSP processors allows for on-line diagnostic functions implementation besides control and estimation algorithms. Early fault symptoms detection, isolation and identification processes are needed for critical fault and emergency shutdown prevention, providing remote information sending to the service. Rotor asymmetry in the early stage of development often is not a critical fault. Depending on the drive application, different handling functions can be applied. Closed-loop control system may be used in...

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“…Low-order models for IMs with faulty rotor are hence sought notwithstanding their lower fidelity and only few can be found in the literature. In [9] a model in three axes is given, including an additional differential equation to describe the effects of the faults. The model in two axes suggested in [10] is essentially based on the model of the symmetric IM and utilizes a correction scheme to take into account the changes in the rotor currents due to a broken bar.…”

Section: Introductionmentioning

confidence: 99%

Idealized Two-Axis Model of Induction Machines under Rotor Fault

Rodyukov¹,

Медведев²

2006

2006 1ST IEEE Conference on Industrial Electronics and Applications

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In this paper a simple two-axis model for Induction Machines (IMs) with electrical rotor faults is derived. Being of reasonably low differential order, it is suitable for mathematical analysis and can serve as a ground for fault detection and fault tolerant control of the IM. The modelling is performed by applying well established idealizing assumptions regarding the magnetic and electrical properties of the motor. Typical motor faults as broken rotor bars are taken into account. The model is validated against data collected from mass-produced industrial IMs. The validation shows very good agreement between simulations and experiment, for the fault considered. NomenclatureFor both the variables and parameters, a capital letter subscript refers to the corresponding stator axis in a conventional three-axis system. In the same manner, a small letter subscript refers to the corresponding rotor axis. The units for the variables and parameters are SI-units which are omitted for the sake of clarity.Throughout the paper, bold capital letters stand for matrices, whereas small/capital letters denote scalars and vectors. Finally, differentiation with respect to time is denoted by the dot, i.e.ẋ = dx dt .

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Model-based broken rotor bar detection on an IFOC driven squirrel cage induction motor

Cited by 17 publications

References 9 publications

Broken rotor bar impact on the closed loop and sensorless control of induction machine

Broken rotor bar impact on the closed loop and sensorless control of induction machine

State and control system variables sensitivity to rotor asymmetry in the induction motor drive

Idealized Two-Axis Model of Induction Machines under Rotor Fault

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