Manufacturing of asynchronous motors with squirrel cage rotor, included in the premium efficiency category IE3, at S.C. Electroprecizia Electrical-Motors S.R.L. S&amp;#x0103;cele

Peter, Ioan; Scutaru, Gheorghe; Nistor, Ciprian Gheorghe

doi:10.1109/optim.2014.6850971

Cited by 11 publications

(5 citation statements)

References 6 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%

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

et al. 2020

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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%

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

et al. 2020

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“…Techniques such as the use of amorphous materials, as well as high quality magnetic materials with lower losses in W/kg, have been used to reduce losses in the core [25,56]. Joule losses have been reduced with new stator winding configurations, as well as increasing the amount of copper in the windings and a greater filling of the stator grooves [56,57]. The introduction of copper rotors, as well as permanent magnet rotors, are other proposals to reduce losses in the rotor, due to the greater conductivity of copper compared to aluminum bars.…”

Section: Improvements In Induction Motorsmentioning

confidence: 99%

“…Energies 2020, 13, x FOR PEER REVIEW 4 of 18 active materials represent more than 80% of the total losses [19], the main efforts to improve the efficiency of these machines have been in this area. Techniques such as the use of amorphous materials, as well as high quality magnetic materials with lower losses in W/kg, have been used to reduce losses in the core [25,56]. Joule losses have been reduced with new stator winding configurations, as well as increasing the amount of copper in the windings and a greater filling of the stator grooves [56,57].…”

Section: Scim's and Lspmm's Similarities And Differencesmentioning

confidence: 99%

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

et al. 2020

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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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“…• The implementation of high quality and amorphous materials for the construction of the core led to the reduction of losses in these high efficiency motors, with decreases of 70-90% compared to traditionally used materials (HITACHI 2018;Peter et al 2014).…”

Section: Improvements In Induction Motorsmentioning

confidence: 99%

“…• Stray load losses also depend on load currents, as well as the motor construction. Surface losses and transversal currents between the rotor bars represent more than 70% of these losses and can be reduced with the improvement in the construction of the IM´s (Peter et al 2014).…”

Section: Improvements In Induction Motorsmentioning

confidence: 99%

Voltage Unbalance Effect on the Behavior of IE2, IE3 And IE4 Induction Motor Classes

Tabora

Matos

Soares

et al. 2020

Anais Do Simpósio Brasileiro De Sistemas Elétricos 2020

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More than 30 million electric motors are sold every year in the world, in the last 20 years the appearance of more efficient electric motors resulted in the replacement of more than 70% of the old motors installed. New technologies are being presented by manufacturers as substitutes for the squirrel cage induction motor (SCIM). Given this scenario, studies should be carried out to analyze the performance of these motors in the same operating conditions to know their main advantages and drawbacks. This study presents a comparison of the performance of electric motors classes IE2, IE3 and IE4 in the presence of voltage unbalance (VU) with under and over voltage. Results show that not only the unbalance percentage present impacts the motor performance, but also the magnitudes of the voltages present. The VU also results in an increase in the harmonics present in each motor, mainly in the permanent magnet hybrid motor, which presents non-linear characteristics.

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Manufacturing of asynchronous motors with squirrel cage rotor, included in the premium efficiency category IE3, at S.C. Electroprecizia Electrical-Motors S.R.L. Săcele

Cited by 11 publications

References 6 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 Effect on the Behavior of IE2, IE3 And IE4 Induction Motor Classes

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