Improved Stator Flux Estimator for Speed Sensorless Induction Motor Drives

Stojić, Djordje; Milinković, Milan; Veinović, Slavko; Klasnić, Ilija

doi:10.1109/tpel.2014.2328617

Cited by 126 publications

(60 citation statements)

References 24 publications

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“…12 to avoid variations of flux estimation error according to rotor speed or voltage frequency because the pure integrator based on (17) cannot be realized practically and the improved flux linkage estimators have dependency on the speed or on the voltage frequency [21], [23], [24], which are sensitive to the voltage offset errors.…”

Section: A Tested Systemmentioning

confidence: 99%

Direct Calculation Method of Reference Flux Linkage for Maximum Torque per Ampere Control in DTC-Based IPMSM Drives

Shinohara

Inoue

Morimoto

et al. 2017

IEEE Trans. Power Electron.

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This paper proposes a maximum torque per ampere control strategy for direct-torque-controlled interior permanent magnet synchronous motor drives. The proposed method is based on the solutions of a quartic equation, a motor model in the d-q rotating frame often used for the synchronous motor controllers, and a well-known equation for maximum torque per ampere control. Therefore, the proposed method does not use a look-up table that depends on parameters of the motor and that has to be created in advance. In addition, the proposed method can use the estimated parameters. Particularly, the variations of the d-and q-axis inductances can be estimated when the inductances are modeled as the functions of the d-and q-axis current. The simulation results validate that the proposed method can achieve the maximum torque per ampere control. In addition, the simulation and experimental results verify the accuracy improvement of the maximum torque per ampere control with the iterated calculation.

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Section: A Tested Systemmentioning

confidence: 99%

Direct Calculation Method of Reference Flux Linkage for Maximum Torque per Ampere Control in DTC-Based IPMSM Drives

Shinohara

Inoue

Morimoto

et al. 2017

IEEE Trans. Power Electron.

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“…5(b). Up to date, a number of strategies were suggested to mitigate the LPF negative effects [14]- [16] and thus, improving the performance of VM-based flux estimators. However, these LPF negative effects do not contribute to the aforementioned eccentric estimated stator flux issue.…”

Section: Imbalanced Inverter Voltage Drop (Ivd)mentioning

confidence: 99%

Comparative performance study of alternate fault-tolerant inverter configurations for direct torque control-based three-phase PM BLAC drives under single-phase open-circuit fault

Hoang

Zhu

2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

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ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. AbstractThis paper presents a comparative performance study of three typical fault-tolerant control (FTC) topologies [split-capacitor (SC), extra-leg split-capacitor (ELSC), and extra-leg extraswitch (ELES)] for direct torque control (DTC)-based threephase permanent magnet (PM) brushless AC (BLAC) drives under single-phase open-circuit fault (SOF). The advantages and limitations of these FTC schemes are theoretically compared and empirically validated. To achieve reliable postfault operations, control issues associated with VM-based flux estimators employed for DTC-based BLAC drives under SOF are demonstrated and relevant remedies are proposed. It is shown that although the ELES scheme can maintain the normal based speed, 6 of its 8 switching states cause phaseto-neutral short circuit in one or both two remaining phase windings resulting in high current harmonic values. Besides, during its implementation, the full DC-link voltage value is always applied to the non-short circuit phase windings leading to high possibility of winding insulation damage. Thus, for a compromise of the normal based speed by a factor of 3/2, the ELSC drive should be used to avoid these issues. Furthermore, in the low-speed region up to half of the rated speed, the lowest copper loss, current harmonics, and torque ripples can be obtained by utilizing the SC drive.

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“…The major weakness of the voltage model flux estimator is the implementation of a pure integrator which suffers from DC drift and initial value problems [34,35]. In order to overcome these problems, numerous methods with different modifications of the voltage model flux estimator have been proposed in literature.…”

Section: Voltage Model Flux Estimatormentioning

confidence: 99%

“…In order to overcome these problems, numerous methods with different modifications of the voltage model flux estimator have been proposed in literature. Most of the proposed voltage model based methods replace the pure integrator by the first-order low pass filter (LPF) with either a fixed [34,36,37], or a variable cut-off frequency [6,35,38]. However, the use of LPF introduces the phase and magnitude errors in the estimated flux and requires a compensation algorithm to compensate these errors.…”

Section: Voltage Model Flux Estimatormentioning

confidence: 99%

PLL-based Rotor Flux Estimation Method for Sensorless Vector Controlled Squirrel-Cage Induction Generators

Kutija

Sumina

Čolović³

2016

Automatika

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Original scientific paperThis paper presents a new rotor flux estimation method for sensorless vector controlled squirrel-cage induction generators used in wind power applications. The proposed method is based on a phase-locked loop (PLL) and the orthogonality between the rotor flux space vector and its back electromotive force (EMF) space vector. Rotor flux is estimated using stator voltage equations without integrating the back EMF components in the stationary reference frame and the well-known difficulties with the implementation of pure integrators are thus avoided. Moreover, the proposed method ensures successful magnetization of a speed-sensorless squirrel-cage induction generator at nonzero speeds which makes it suitable for wind power applications. Experimental results on a 560 kW squirrel-cage induction generator are presented to confirm the effectiveness and the feasibility of the proposed method.Key words: Induction generator, Flux estimation, Phase locked loop (PLL), Sensorless control, Vector control, Wind power generation Metoda za estimaciju magnetskog toka rotora kaveznih asinkronih generatora bez mjernogčlana brzine vrtnje temeljena na fazno spregnutoj petlji. U radu je predstavljena nova metoda za estimaciju magnetskog toka rotora vektorski upravljanih kaveznih asinkronih vjetrogeneratora. Predložena metoda se temelji na fazno spregnutoj petlji i ortogonalnosti izmeu prostornog vektora magnetskog toka rotora i njemu pripadajućeg prostornog vektora induciranog napona. Magnetski tok rotora se estimira korištenjem naponskih jednadžbi statora u koordinatnom sustavu statora bez integracije komponenti induciranog naponačime su izbjegnuti dobro poznati problemi implementacije integratora. Osim toga, predložena metoda omogućava uspješno magnetiziranje pri vrtnji kaveznog asinkronog generatora bez mjernogčlana brzine vrtnje pa je pogodna za primjenu na vjetrogeneratorima. U radu su prikazani eksperimentalni rezultati za kavezni asinkroni generator snage 560 kW koji potvruju izvedivost i učinkovitost predložene metode.Ključne riječi: asinkroni generator, estimacija magnetskog toka, fazno spregnuta petlja, bezsenzorsko upravljanje, vektorsko upravljanje, proizvodnja električne energije iz vjetra

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Improved Stator Flux Estimator for Speed Sensorless Induction Motor Drives

Cited by 126 publications

References 24 publications

Direct Calculation Method of Reference Flux Linkage for Maximum Torque per Ampere Control in DTC-Based IPMSM Drives

Direct Calculation Method of Reference Flux Linkage for Maximum Torque per Ampere Control in DTC-Based IPMSM Drives

Comparative performance study of alternate fault-tolerant inverter configurations for direct torque control-based three-phase PM BLAC drives under single-phase open-circuit fault

PLL-based Rotor Flux Estimation Method for Sensorless Vector Controlled Squirrel-Cage Induction Generators

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