Design strategy of an adaptive full-order observer for speed-sensorless induction-motor Drives-tracking performance and stabilization

Suwankawin, Surapong; Sangwongwanich, Somboon

doi:10.1109/tie.2005.862308

Cited by 167 publications

(91 citation statements)

References 19 publications

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“…(5) should be the positive real function. However, this positive real property is not always valid in regenerating mode [6]. If the feedback gain design is not appropriate, transfer function T(s) will lose the positive real property.…”

Section: Positive Real Maintenancementioning

confidence: 99%

“…However, the unstable situation of sensorless observer in the regeneration mode might occur. In the past few years, much attention has been paid to this field [5][6][7][8][9][10][11][12][13]. Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, refs. [6][7][8] proposed two different solutions: the first one is to maintain the positive reality of the feedforward transfer function; the other one is to augment the stator current error, which would enable the speed estimator to identify the speed with the information in the stator current. Even though both two methods have solved the instability problem roughly, they do not provide a general solution to the instability problem.…”

Section: Introductionmentioning

confidence: 99%

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Stable analysis on speed-adaptive observer in regenerating mode

Ouyang

März

2011

Sci. China Technol. Sci.

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Speed-adaptive full-order flux observer is the most promising flux estimator among all the sensorless control method. However, conventional speed-adaptive flux observer becomes unstable during regenerating operation at low speed since induction motor is an observable system except dc excitation. Thus, the instability problem is caused by inappropriate designing of observer. Based on the eigenvalues of extended observer, this paper interprets unstable situation, that the eigenvalues of extended observer have a positive real part. Therefore, the observer cannot converge. Against the two different solutions for unstable problem-positive real maintaining and current error augment, the proposed method based on the eigenvalue could unify these two solutions, which gives the complete stability condition for speed-adaptive full-order observer. It does a lot help in observer designing. The observer configured by this proposed method was verified in the torque controlling of 20 kW induction motor. According to the experiment result, with appropriate designing of observer, the unstable situation during regeneration mode could be completely overcome

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Section: Positive Real Maintenancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stable analysis on speed-adaptive observer in regenerating mode

Ouyang

März

2011

Sci. China Technol. Sci.

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“…By specifying the tracking errors e ssi and the rates R i , i = 1, 2, 3, the integral gains K iω , K is , K ir can be computed as (Suwankawin and Sangwongwanich, 2006) The design of the proportional gains K pω , K ps , K pr is considered from the transfer functions between the estimated quantities and external disturbances, denoted as η η , a 4 × 1 vector. The three estimated quantities can be derived as…”

Section: Stability Analysismentioning

confidence: 99%

A new MRAS based strategy for simultaneous estimation and control of a sensorless induction motor drive

Chang

Liu²

2010

Journal of the Chinese Institute of Engineers

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The control of an induction motor drive without speed sensors, is formulated in a stator-flux-oriented frame employing a full-order closed-loop flux observer. Applying the MRAS approach enables the set up of the estimators for rotor speed, stator resistance, and rotor resistance simultaneously. A multi-input multi-output crosscoupled dynamic model is derived, which explains the instability problem inherent in the simultaneous estimation of motor speed and resistances. To achieve stable estimation, a stability criterion is established and a systematic design procedure for the estimators is proposed. The theoretical work is further verified by experiments which show that the proposed control strategy stabilizes the drive in both motoring and regenerating modes.

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“…Thus, the drive stability can't be guaranteed when this type of observer is associated with a field oriented control. There was many work in order to reduce this region of instability which is due to inadequate observer design [1,2,5,14]. In this paper, we describe the design of an adaptation law that minimizes the instability region of an adaptive speed estimator.…”

Section: Introductionmentioning

confidence: 99%

Feedback Gain Design Method for the Full-Order Flux Observer in Sensorless Control of Induction Motor

Bouhenna

Mansouri²,

Chenafa³

et al. 2008

INT J COMPUT COMMUN

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This paper deals with a feedback gain design method for the full-order flux observer with adaptive speed loop, which enables the minimizing the unstable operation region of this observer to a line in the torque-speed plane. The stability in regenerating mode is studied using necessary condition of stability based on determinant of matrix and a linearized model. Simulations results where the proposed observer is compared with an exiting solution (where the unstable region is not totally removed) are presented to validate the proposed observer design.

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Design strategy of an adaptive full-order observer for speed-sensorless induction-motor Drives-tracking performance and stabilization

Cited by 167 publications

References 19 publications

Stable analysis on speed-adaptive observer in regenerating mode

Stable analysis on speed-adaptive observer in regenerating mode

A new MRAS based strategy for simultaneous estimation and control of a sensorless induction motor drive

Feedback Gain Design Method for the Full-Order Flux Observer in Sensorless Control of Induction Motor

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