Sensorless Drives in Industrial Applications

Pacas, Mario

doi:10.1109/mie.2011.941125

Cited by 185 publications

(92 citation statements)

References 18 publications

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“…As the q-current is responsible for maintaining the constant torque, the d-current dynamics determines, according to (26), the dynamics of |ψ s |(t). Fastest achievable transient of i sd is determined with inverter limitation.…”

Section: Fault-tolerant Controlmentioning

confidence: 99%

See 1 more Smart Citation

Fault-tolerant Control of a Wind Turbine with Generator Stator Inter-turn Faults

et al. 2013

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Original scientific paperFaults of wind turbine generator electromechanical parts are common and very expensive. This paper introduces a generator fault-tolerant control scheme for variable-speed variable-pitch wind turbines that can be applied regardless to the AC generator used. The focus is on generator stator isolation inter-turn fault that can be diagnosed and characterised before triggering the safety device. An extension of the conventional wind turbine control structure is proposed that prevents the fault propagation while power delivery under fault is deteriorated as less as possible compared to healthy machine conditions. Fault-induced and inherent asymmetries of the generator are estimated and respected by the field-oriented control of the generator to eliminate torque oscillations. An approach for asymmetry detection based on an unscented Kalman filter is proposed. Presented fault-tolerant control strategy is developed taking into account its modular implementation and installation in available control systems of existing wind turbines to extend their exploitable life span and increase energy production. Simulation results for the case of a megawatt class wind turbine are presented.Key words: Wind turbine control, Generator fault-tolerant control, Stator winding isolation fault, Nonlinear estimation, Asymmetric field-oriented controlUpravljanje vjetroagregatom otporno na me uzavojske kvarove statorskog namota generatora. Kvarovi elektromehaničkih dijelova generatora vjetroagregatačesti su i izrazito skupi. U ovom radu predstavljen je koncept na kvarove otpornog upravljanja generatorom vjetroagregata s promjenjivom brzinom vrtnje i zakretom lopatica primjenjiv bez obzira na tip korištenog izmjeničnog generatora. Naglasak je stavljen na oštećenje izolacije unutar namota jedne faze statora generatora koje se može dijagnosticirati i okarakterizirati prije aktiviranja sustava zaštite. Predložena je nadogradnja postojećeg sustava upravljanja vjetroagregatom koja sprječava širenje kvara i pritom postižečim manje smanjenje proizvodnje električne energije u odnosu na normalan režim rada. Tako er je prikazano vektorsko upravljanje generatorom koje uzima u obzir nesimetrije generatora, kako one nastale uslijed djelovanja kvara, tako i one inherentne. U radu je prikazan pristup za otkrivanje nesimetrija generatora zasnovan na nederivacijskom Kalmanovu filtru. Predstavljena strategija upravljanja razvijena je uvažavajući mogućnost modularnog nadovezivanja na postojeće algoritme upravljanja već postavljenih vjetroagregata s ciljem produženja njihova životnog vijeka i povećanja proizvodnje energije. Dani su simulacijski rezultati za slučaj vjetroagregata iz megavatne klase.Ključne riječi: upravljanje vjetroagregatom, upravljanje otporno na kvarove generatora, kvar izolacije statorskog namota, nelinearna estimacija, vektorsko upravljanje nesimetričnim strojem

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Section: Fault-tolerant Controlmentioning

confidence: 99%

“…Often applied one is to consider machine saliencies by choosing different values of stator inductances in d and q axes [18]. Also a lot of effort is currently put into finding adequate solution for sensorless drives [26,27].…”

Section: Control Of Asymmetric Induction Machinementioning

confidence: 99%

Fault-tolerant Control of a Wind Turbine with Generator Stator Inter-turn Faults

et al. 2013

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“…However, the installation and debugging of the position transducer will result in high cost and large size of drives and limit the application of PMSM in relatively harsh environment [6]. Therefore, sensorless control of PMSM has been a hot research topic of motor control technology with advantages of low cost and high reliability [7], [8].…”

Section: Introductionmentioning

confidence: 99%

New Adaptive Sliding-Mode Observer Design For Sensorless Control Of Pmsm In Electric Vehicle Drive System

Xiong

Zhang

Jing

et al. 2016

International Journal on Smart Sensing and Intelligent Systems

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Abstract-In this study, a new adaptive sliding-mode observer is proposed to estimate the rotor position and speed for sensorless control of permanent-magnet synchronous motor (PMSM) in an electric vehicle drive system. This observer can effectively reduce the estimation errors caused by the inherent chattering phenomenon for a conventional sliding-mode observer and the stator resistance uncertainty due to the variation of motor temperature. This new sliding-mode observer is designed by using a hyperbolic tangent function instead of sign function together with a variable boundary layer, and the new adaptive law is constructed according to the back electromotive force model to reinforce dynamic performance and the robustness of system. Meanwhile, a stator resistance identification algorithm is raised and guaranteed to be stable by using a Lyapunov method. The performance of the developed observer is compared with the conventional sliding-mode controller. Both simulation and experimental results confirm that the chattering phenomenon is effectively eliminated and the estimation accuracy for position and velocity is apparently improved when applying the developed observer in the electric vehicle drive system.

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“…However, the installation of these position sensors has some drawbacks related to increasing cost, size, weight, and wiring complexity of the motor drive systems. From the viewpoint of system reliability, mounting position sensors on the rotors will reduce the mechanical robustness of electric machines, particularly in hard work environments [3,4]. To overcome these drawbacks, significant research in the last decades [5,6] has gone into the development of sensorless drives that have a comparable or similar dynamic performance to sensor-based drives.…”

Section: Introductionmentioning

confidence: 99%

Sensorless velocity and direction angle control of an unmanned vehicle

Derdiyok¹,

Başçı²

2016

Turk J Elec Eng & Comp Sci

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Abstract:In this paper an observer based on measured and estimated currents and a kinematic model is designed to estimate the velocity and direction angle of an unmanned vehicle (UV). The Lyapunov stability theory is used to establish the stability conditions for the observer. It is shown that the observer will converge in a finite time and the observer gains satisfy the constraints of the stability conditions. The observed velocity and direction angle are used in the closed loop instead of measured ones for sensorless control of the UV. The velocity and direction angle control of the UV are carried out by a well-tuned PI controller. The experimental results show that the proposed observer can be perfectly implemented for sensorless control without using a mechanical sensor, and satisfying results are obtained. In the experiment, command voltages are used rather than measured ones, and therefore only current sensors are needed for the proposed algorithm.

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Sensorless Drives in Industrial Applications

Cited by 185 publications

References 18 publications

Fault-tolerant Control of a Wind Turbine with Generator Stator Inter-turn Faults

Fault-tolerant Control of a Wind Turbine with Generator Stator Inter-turn Faults

New Adaptive Sliding-Mode Observer Design For Sensorless Control Of Pmsm In Electric Vehicle Drive System

Sensorless velocity and direction angle control of an unmanned vehicle

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