A new method for RFOC of Induction Motor under open-phase fault

Jannati, Mohammad; Idris, Nik Rumzi Nik; Aziz, Mohd Junaidi Abdul

doi:10.1109/iecon.2013.6699529

Cited by 19 publications

(15 citation statements)

References 14 publications

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“…Since the structure of a faulty IM is similar to that of a single-phase IM, these control techniques can also be applied to faulty IMs [10][11][12][13][14][15][16][17][18][19][20][21]. In [10] stator FOC of a single-phase IM with a current double sequence controller was proposed; the use of the current double sequence controller resulted in a complex control system.…”

Section: Introductionmentioning

confidence: 99%

Vector control of unbalanced 3-phase IM using forward and backward components

Jannati¹,

Idris²

2017

Turk J Elec Eng & Comp Sci

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Abstract:In some industries, continuous operation of 3-phase induction motors (IMs) even under faults until the scheduled maintenance time is essential. Conventional control techniques such as field-oriented control (FOC) cannot be used to control faulty IMs since this will result in significant oscillations in the speed and torque. Consequently, a new control approach must be developed for improving IM performance during fault conditions. This paper presents a method for vector control of 3-phase IMs under open-phase faults. The main advantage of this control scheme is its ability to handle not only one phase but also two phases of open-phase fault conditions. When applying this control technique to a faulty machine, only minor changes to the parameters used in the equations are needed and the conventional FOC algorithm used for healthy 3-phase IMs can still be used. In this paper, simulation and experimental results are presented to study the effectiveness of the proposed technique to control both healthy and faulty 3-phase IMs. The results show that the proposed technique reduces electromagnetic torque pulsations during open-phase fault conditions.

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Section: Introductionmentioning

confidence: 99%

Vector control of unbalanced 3-phase IM using forward and backward components

Jannati¹,

Idris²

2017

Turk J Elec Eng & Comp Sci

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“…By applying (2) to the equations of the faulty three-phase IM, the stator and rotor voltage equations in the rotating reference frame can be obtained as forward and backward components [4]. The backward terms are produced because of different inductances in the faulty IM equations.…”

Section: Balanced Induction Motor Faulty Induction Motormentioning

confidence: 99%

“…Using this supposition is reflected in the speed and torque responses of the faulty IM as fully discussed in [4]. It was shown in [4] that a small magnitude of oscillations at the synchronous frequency existed in the faulty IM's speed and torque responses when the supposition L qs /L ds =(M q /M d ) 2 was used. The main contribution of the present study was to develop a novel and exact vector control method based on RFOC for IMs, which can also be adopted for IMs under open-phase fault.…”

Section: B Introductionmentioning

confidence: 99%

“…Applying a conventional control strategy such as FOC to a faulty three-phase IM (threephase machine under open-phase fault) will result insignificant oscillations in the speed and torque output [1][2][3][4]. It was shown in [1-4] that using transformation matrices, the FOC equation structure for a faulty three-phase IM can be transformed into a structure that is similar to that for a balanced IM.…”

Section: B Introductionmentioning

confidence: 99%

“…However, the backward terms of the stator voltage equations were neglected in the process of calculating the FOC equations [2,3]. The proposed method in [4] for vector control of faulty IMs is also extremely dependent on the regulation of the current proportional-integral controller. Reference [5] reviews and compares fault tolerant AC drives on the basis of features, costs and limitations.…”

Section: B Introductionmentioning

confidence: 99%

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A Novel Method for Vector Control of Three-Phase Induction Motor under Open-Phase Fault

Jannati

Asgari

Idris

et al. 2015

J. Eng. Technol. Sci.

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Abstract. The majority of electrical machines such as induction motors can be modeled by an equivalent two-phase machine model (d-q model). A three-phase induction motor with one of the stator phases opened (faulty three-phase induction motor) can be also modeled by an equivalent two-phase machine. If a conventional vector control method for balanced three-phase induction motors is used for this faulty machine, significant oscillations in speed and torque will result. In this paper, a novel technique for vector control of faulty three-phase induction motors based on rotor-field oriented control (RFOC) is presented. The performance of the proposed method was evaluated using MATLAB software. The results show that it achieves significant improvements in the oscillation reduction of the speed and torque responses. Keywords: field-oriented control; open-phase fault; speed and torque oscillations; three-phase induction motors; vector control. 1 B IntroductionNowadays, field-oriented control (FOC) of induction motors (IMs) is broadly adopted to obtain high dynamic performance in drive systems. Applying a conventional control strategy such as FOC to a faulty three-phase IM (threephase machine under open-phase fault) will result insignificant oscillations in the speed and torque output [1][2][3][4]. It was shown in [1-4] that using transformation matrices, the FOC equation structure for a faulty three-phase IM can be transformed into a structure that is similar to that for a balanced IM. However, the backward terms of the stator voltage equations were neglected in the process of calculating the FOC equations [2,3]. The proposed method in [4] for vector control of faulty IMs is also extremely dependent on the regulation of the current proportional-integral controller. Reference [5] reviews and compares fault tolerant AC drives on the basis of features, costs and limitations.It is also interesting to note that the three-phase IM model with one phase cutoff is, in principle, similar to the model of a single-phase IM with two windings.

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