Parameter sensitivity of full-order flux observers for induction motors

Hinkkanen, Marko; Luomi, J.

doi:10.1109/ias.2002.1042658

Cited by 12 publications

(23 citation statements)

References 13 publications

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“…The effect of erroneous parameters used within speed-adaptive flux observers can be studied by means of a steady-state expression forψ R /ψ R [13]. In the following, the accuracy of the proposed observer design is compared with the accuracy of three existing observer designs [3], [5], [7], which reduce or remove the unstable region in the regenerating mode at low speeds if the parameter estimates are accurate.…”

Section: Effect Of Parameter Errors On Accuracymentioning

confidence: 99%

Stabilization of Regenerating-Mode Operation in Sensorless Induction Motor Drives by Full-Order Flux Observer Design

Hinkkanen¹,

Luomi²

2004

IEEE Trans. Ind. Electron.

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112

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Abstract-This paper deals with the full-order flux observer design for speed-sensorless induction motor drives. An unstable region encountered in the regenerating mode at low speeds is well known. To remedy the problem, a modified speed-adaptation law is proposed. Instead of using only the current estimation error perpendicular to the estimated flux, the parallel component is also exploited in the regenerating mode. Using current estimation error loci in steady state, a linearized model, simulations, and experiments, it is shown that the observer using the proposed speed-adaptation law does not have the unstable region. It is also shown that the effect of erroneous parameter estimates on the accuracy of the observer is comparatively small.

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Section: Effect Of Parameter Errors On Accuracymentioning

confidence: 99%

Stabilization of Regenerating-Mode Operation in Sensorless Induction Motor Drives by Full-Order Flux Observer Design

Hinkkanen¹,

Luomi²

2004

IEEE Trans. Ind. Electron.

Self Cite

112

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“…At high speeds, the digital implementation of the observer has an important effect on the estimation accuracy and stability [22], [28], [29]. Good estimation accuracy at all stator frequencies can be achieved by implementing the observer in synchronous coordinates (where the quantities are dc in the steady state) in accordance with Fig.…”

Section: Digital Implementation Of the Observermentioning

confidence: 81%

Gain scheduling of a full-order observer for sensorless induction motor drives

Hinkkanen

Harnefors

2013

2013 IEEE International Symposium on Sensorless Control for Electrical Drives and Predictive Control of Electrical Drives and P

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Abstract-This paper deals with the design of a speed-adaptive full-order observer for sensorless induction motor (IM) drives. A general stabilizing observer gain matrix, having three free design parameters, is used as a design framework. A gain-scheduled selection of the free design parameters is proposed. Furthermore, the full-order observer is augmented with the stator-resistance adaptation, and the local stability of the augmented observer is analyzed. The performance of the proposed full-order observer design is experimentally compared with a reduced-order observer using a 2.2-kW IM drive.

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“…Copyright ⓒ 2014 SERSC Numerous methods for induction machine online and offline parameter estimation were reviewed in [14], and parameter sensitivity analyses of full-order flux observers were given in [15]. Online estimation of states and parameters of an induction mot or with Kalman filter was presented in [16], and a suitable methodology was proposed to ensure a good level of estimation accuracy.…”

mentioning

confidence: 99%