Overview of Retrofitting Options in Induction Motors to Improve Their Efficiency and Reliability

Ferreira, Fernando J. T. E.; Silva, Andre M.; Aguiar, Victor de Paula Brandão; Pontes, Ricardo S. T.; Quispe, Enrique C.; Almeida, Anı́bal T. de

doi:10.1109/eeeic.2018.8493887

Cited by 12 publications

(7 citation statements)

References 18 publications

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“…Due to that, the main efforts by manufacturers and researchers have been focused on the main losses and the ways to reduce them [21]. Ohmic losses were reduced with more copper wiring in stator and higher slot fill [22]; core losses were reduced by using magnetic materials of high quality [23]; stray load losses with improvements in the motor geometry; and windage and friction losses were reduced with an appropriate design of cooling fan and the reduction in the bearing/seals friction [9]. Consequently IM´s have experienced numerous advances in relation to efficiency, reaching values close to 96%, as is the case of the IE4 class Line Start Permanent Magner Motor (LSPMM).…”

Section: A Losses In Induction Motorsmentioning

confidence: 99%

“…More efficient motors result from the implementation of improvements in the design, construction and materials used [9], thus inevitably the disturbances in the electrical systems will impact differently each technology to a greater or lesser degree. Despite the great benefits that efficiency classes substitution can bring, induction motors (IM´s) efficiency and performance not only depend on its construction and technology but also on the supply conditions.…”

Section: Introductionmentioning

confidence: 99%

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Assessing Voltage Unbalance Conditions in IE2, IE3 and IE4 Classes Induction Motors

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Brazil has started an energy transition process through more efficient electric motors. The new legislation determining the IE3 Class as the minimum efficiency level in commercial electric motors became valid in August 2019. Currently, four induction motor classes are defined by the IEC 60034-30-1, with the IE4 class being the most efficient, and in the same way, proposals to achieve IE5 efficiency class are available in the market. Considering the upcoming new technologies, it is necessary to know the impact of power systems disturbances in IM's in view of future substitutions. This paper presents a detailed analysis of the impact of different percentages of under and over voltage unbalances on the temperature and performance of electric motors classes IE2, IE3 and IE4. Results show that the IE4 hybrid motor presents non-linear characteristics, being observed this motor shows less dependence on voltage variation, mainly undervoltage unbalance. An analysis of how this phenomenon impacts on the current harmonic distortions in the induction motors operation is also developed through Spearman's correlation matrices. Finally, models that represent the temperature increase of each motor with different voltage unbalance conditions are presented.

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Section: A Losses In Induction Motorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessing Voltage Unbalance Conditions in IE2, IE3 and IE4 Classes Induction Motors

et al. 2020

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“…Induction motors comparison [2,3,16,[18][19][20]22,25,34,35,37,38] Harmonics impacts on induction motors [5,6,22,[34][35][36]39-44] Harmonics presence and diagnosis in power systems [11,12,44] Fault diagnosis in induction motors [10,13,14] Economic substitution studies [16,23] Line start permanent magnet motor (LSPMM) [5,17,18,21,22,[24][25][26][27][28]31,32,43,[45][46][47][48][49][50][51] Temperature increase due to harmonics [3,5,[34]…”

Section: Paper Main Subject Relevant Literaturementioning

confidence: 99%

“…An analysis of the technical and economic benefits of substitution between these technologies has been presented in [2,3,[16][17][18][19][20][21][22][23]. In addition, the studies in [17,18,21,22,[24][25][26][27][28][29][30][31][32] include the main constructive characteristics, weaknesses and strengths related to the LSPMM.…”

Section: Introductionmentioning

confidence: 99%

Voltage Harmonic Impacts on Electric Motors: A Comparison between IE2, IE3 and IE4 Induction Motor Classes

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Global energy systems are undergoing a transition process towards renewable energy and energy efficiency practices. Induction motors play an important role in this energy transformation process since they are widely used as industrial loads, representing more than 53% of global energy consumption. With more countries adopting minimum energy performance standards through more efficient induction motors, comparisons between these new technologies in the presence of electrical disturbances must be systematically evaluated before adopting a substitution policy in the industry. To this end, this work presents a comparative analysis of the impact of harmonic voltages on the performance and temperature rise of electric motors classes IE2, IE3 and IE4 in the same operational conditions in view of future substitutions. The results show that under ideal operating conditions the IE4 class permanent magnet motor has better performance in terms of consumption and temperature, however presenting non-linear characteristics. In the presence of voltage harmonics, this scenario changes completely according to the harmonic content. Finally, aiming to analyze the harmonics influence in the motor temperature rise a statistical analysis by means of Spearman correlation matrices is presented.

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“…With more efficient motors present in the market, numerous studies have been carried out to analyze the main strengths and weaknesses of these new technologies, mainly with the main disturbances present in current electrical systems. Comparisons between Induction Motors (IM) of different efficiency classes have been presented in (A. T. D. Almeida et al, 2012; A. T. de Almeida et al, 2014de Almeida et al, , 2009Debruyne, 2014;Ferreira et al, 2018). In relation to VU, authors in (Abu-Elhaija & Muetze, 2018;NEMA MG1-2016, n.d.;Neves et al, 2016Neves et al, , 2016Singh & Singh, 2013;Zhang et al, 2017) comment about the negative impacts on efficiency, torque and power factor reduction.…”

Section: Introductionmentioning

confidence: 99%

Voltage Unbalance Impacts on Temperature of IE2, IE3 & IE4 Class Induction Motors

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et al. 2020

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Energy efficiency actions is a shared policy goal of many governments in the world. In that sense, drive systems represent an important opportunity for energy savings. With an average of 20.1 million installed motors that represents approximately 30% of total energy consumption In Brazil, old motors sub-stitution for new and more efficient technologies is now a reality. The present work analyses the impact of voltage unbalance (VU) with under and over voltage on the line current and temperature of electric motors classes IE2, IE3 and IE4, the latter being a hybrid permanent magnet and squirrel cage motor. To do this, six different unbalance voltage conditions were applied to each motor while measurements were made to capture the main variations for each technology. The results show how the voltage unbalance results in considerable uneven increases in current and temperature in each motor, it was also observed how the hybrid permanent magnet motor shows less dependence on voltage variations, mainly with undervoltage.

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Overview of Retrofitting Options in Induction Motors to Improve Their Efficiency and Reliability

Cited by 12 publications

References 18 publications

Assessing Voltage Unbalance Conditions in IE2, IE3 and IE4 Classes Induction Motors

Assessing Voltage Unbalance Conditions in IE2, IE3 and IE4 Classes Induction Motors

Voltage Harmonic Impacts on Electric Motors: A Comparison between IE2, IE3 and IE4 Induction Motor Classes

Voltage Unbalance Impacts on Temperature of IE2, IE3 & IE4 Class Induction Motors

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