Quantitative assessment of three phase supply voltage unbalance effects on induction motors

Dekhandji, Fatma Zohra; Refoufi, Larbi; Bentarzi, Hamid

doi:10.1007/s13198-015-0401-3

Cited by 24 publications

(12 citation statements)

References 18 publications

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“…The power factor is inversely proportional to the positive sequence component, and it is increased with the presence of VU undervoltage, while the VU with over voltage results in large decreases in this value according to the VU percentage [46]. Figure 13 shows the variation of this parameter with VU and the inverse relation with positive sequence phase voltage in the IE2, IE3 and IE4 Class motors.…”

Section: B Power Factormentioning

confidence: 98%

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: B Power Factormentioning

confidence: 98%

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

et al. 2020

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“…Other works presented in [33]- [35] have also considered complex voltage unbalance, which, unlike scalar unbalance, results in additional impacts such as torque pulsation and increased losses.…”

Section: Introductionmentioning

confidence: 99%

Assessing Energy Efficiency and Power Quality Impacts Due to High-Efficiency Motors Operating Under Nonideal Energy Supply

Tabora¹,

Tostes

Bezerra

et al. 2021

IEEE Access

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The search for more competitive equipment in the global market has led to the implementation of new materials and technologies in the search for greater energy efficiency. This is certainly a guideline followed by the electric motor industry that has introduced new technologies in rotating machines, such as the permanent magnet motor, evolving into increasingly efficient motor classes. However, subjecting these efficient motors under nonideal electric grid power conditions, such as voltage unbalance, can cause these efficient machines to generate additional distortions in the voltage and current waveforms, which in turn not only affect the performance of electric motors themselves but also that of the electrical system in general. This work presents a comparison between energy efficiency gain and the corresponding power quality degradation through a detailed harmonic analysis of the effects of voltage harmonics and voltage unbalance in three 0.75-kW electric motors classes: IE2, IE3, and IE4, The results show that for increasing percentages of a specific harmonic distortion, other harmonics are also increased in the higher efficiency electric motors sample analyzed, and similar responses were also observed for large percentages of voltage unbalance, mainly in the line-start permanent magnet motor class IE4. The results achieved are interesting but rigorously reflect only the tested motor sample and cannot be generalized to all motors, in other power ranges, of the respective motor classes tested. For generalization, exhaustive tests must be accomplished to formulate general conclusions according to the electric motors' classes commercially available.

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“…Complex VU factor angle increases the winding temperature, and reduced coefficient of AM is supplied with VU (Gnacinski, 2008;Wang, 2001). The power factor of an AM is inversely proportional to the positive sequence, and performance is also proportional to the positive sequence (Lee, 1999;Dekhandji et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

The Influence of Voltage Quality on Asynchronous Motor Performance of EKG Excavator in Open Pit Mines – Vinacomin

Cuong¹,

Hiếu

2020

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At present, in open-pit mining, the main and most important electrical load is the electric excavator, and currently using a variety of EKG excavators. 6kV electrical network in open pit mining has the characteristics such as long outgoing lines, use high-powered equipment, multiple branches, and increasing use of power electronics on the grid, this reduces the quality of the power supplied to the excavators EKG, resulting in an increase in power losses thereby greatly affecting the performance of the excavators. Previous studies on the quality of the power supplied to the excavator often only mentioned voltage deviations, in addition to this factor, the performance of the excavator is also greatly affected by nonsinusoidal voltage waveforms of the excavator power supply. This paper analyzes the influence of the nonsinusoidal of voltage on the power loss of electric motors used in EKG electric excavators in open pit mining based on the method of electromagnetic analysis and verification on simulation software.

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Quantitative assessment of three phase supply voltage unbalance effects on induction motors

Cited by 24 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

Assessing Energy Efficiency and Power Quality Impacts Due to High-Efficiency Motors Operating Under Nonideal Energy Supply

The Influence of Voltage Quality on Asynchronous Motor Performance of EKG Excavator in Open Pit Mines – Vinacomin

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