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Article

Three-Phase Induction Motors Online Protection against Unbalanced Supply Voltages

1
CISE—Electromechatronic Systems Research Centre, University of Beira Interior, Calçada Fonte do Lameiro, P-6201-001 Covilhã, Portugal
2
Laboratoire de Génie Electrique, Biskra (LGEB), Department of Electrical Engineering, University of Mohamed Khider Biskra, Biskra 07000, Algeria
3
Laboratoire de Modélisation des Systèmes Energétiques (LMSE), Department of Electrical Engineering, University of Mohamed Khider Biskra, Biskra 07000, Algeria
*
Author to whom correspondence should be addressed.
Academic Editor: Christoph M. Hackl
Machines 2021, 9(9), 203; https://doi.org/10.3390/machines9090203
Received: 24 August 2021 / Revised: 10 September 2021 / Accepted: 17 September 2021 / Published: 20 September 2021
(This article belongs to the Special Issue Feature Papers to Celebrate the First Impact Factor of Machines)
Three-phase induction motors (IMs) are the main workhorse in industry due to their many advantages as compared to other types of industrial motors. However, the efficiency and lifetime of IMs can be considerably affected by some operating conditions, in particular those related to unbalanced supply voltages (USV), which is quite a common condition in industrial plants. Therefore, early detection and a precise severity estimation of the USV for all working conditions can prevent major breakdowns and increase reliability and safety of industrial facilities. This paper proposes a reliable method allowing for a precise and online detection of the USV condition, by monitoring a pertinent indicator calculated using the voltage symmetrical components. The effectiveness of the proposed method is validated experimentally for several different working conditions, and a comparison with other indicators available in the literature is also performed. View Full-Text
Keywords: three-phase IMs; unbalanced supply voltage (USV); voltage negative factor (VNF); fortescue transform (FT); short time least square Prony’s method (STLSP) three-phase IMs; unbalanced supply voltage (USV); voltage negative factor (VNF); fortescue transform (FT); short time least square Prony’s method (STLSP)
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MDPI and ACS Style

Laadjal, K.; Sahraoui, M.; Alloui, A.; Cardoso, A.J.M. Three-Phase Induction Motors Online Protection against Unbalanced Supply Voltages. Machines 2021, 9, 203. https://doi.org/10.3390/machines9090203

AMA Style

Laadjal K, Sahraoui M, Alloui A, Cardoso AJM. Three-Phase Induction Motors Online Protection against Unbalanced Supply Voltages. Machines. 2021; 9(9):203. https://doi.org/10.3390/machines9090203

Chicago/Turabian Style

Laadjal, Khaled, Mohamed Sahraoui, Abdeldjalil Alloui, and Antonio J.M. Cardoso. 2021. "Three-Phase Induction Motors Online Protection against Unbalanced Supply Voltages" Machines 9, no. 9: 203. https://doi.org/10.3390/machines9090203

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