Study the effects of no nominal conditions on the performance of high efficiency induction motor

Rachev, Svilen; Dimitrov, Lyubomir; Ivanov, Ivaylo D.; Karakoulidis, Konstantinos

doi:10.1109/ciem.2017.8120772

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…Therefore, the work cycles that can be found are very different and this reason, the calculation was made by setting a fixed load index and mo number of operating hours. In this way, energy saving can be calculated for cycle as a sum of the different operating conditions each cycle contains [19].…”

Section: Energy Savingmentioning

confidence: 99%

Replacing Induction Motors without Defined Efficiency Class by IE Class: Example of Energy, Economic, and Environmental Evaluation in 1.5 kW—IE3 Motors

2023

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This paper shows the results obtained from the study on the variables that have the greatest influence on the decision to replace three-phase induction motors, without a defined efficiency class and installed in industrial applications, with IE3 efficiency class induction motors. The work has been carried out on motors with a nominal power of 1.5 kW due to the availability of laboratory tests that have allowed us to accurately quantify the selected study variables. According to IEC 60034-30, between 0.75 kW and 4 kW is the greatest potential for energy savings in electric motors installed within the industrial sector. The tests carried out have made it possible to assess different operating conditions of the motor: direct power supply from the grid, electronic power supply using scalar control, and electronic power supply using direct torque control. The study has focused on three aspects: energy evaluation, assessing the savings potential; economic evaluation, based on indicators such as Payback Period and Net Present Value; environmental assessment, quantifying the impact indicators proposed by the Methodology for Ecodesign of Energy-related Products (MEErP). A sensitivity analysis has been carried out to quantify, through ratios, different operating points from those directly analyzed in the article.

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Section: Energy Savingmentioning

confidence: 99%

Replacing Induction Motors without Defined Efficiency Class by IE Class: Example of Energy, Economic, and Environmental Evaluation in 1.5 kW—IE3 Motors

2023

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“…The dynamic behaviour of a fan driven by an induction motor has been studied by a system of five differential equations formed by equations (2) and (10) [7,10]. The four of these equations are for model stator currents and the fifth one is related to torques and it is the motion equation [7,11]. As mentioned above, the moment of resistance is changed by so-called 'square-law' [12].…”

Section: Mathematical Modelmentioning

confidence: 99%

“…The variable electrical losses in the stator and rotor, the magnitude of which depends on the values of the flowing currents, are calculated as follows [5,6,7]:…”

Section: Mathematical Modelmentioning

confidence: 99%

Evaluation of the behaviour of an induction motor for fan system under various external factors

Rachev

Dimitrov

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Paper concerns a mathematical model developed for working process observation of a fan system squirrel-cage induction motor electric drive. The electric motor in question is designed for permanent, uninterruptible operation. The system of differential equations is converted and processed with the help of appropriate software. The impact of external factors is assessed – supply voltage deflection and variation of rates of mechanical quantities involved in the motion equation. Electrical power losses in steady-state regime and energy losses at start-up are calculated. The results obtained are practical oriented when considering methods to start and control the rotational frequency to imrove energy efficiency.

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“…The criterion of the same output power has been taken as a reference to unify the results better. In addition to the improvement obtained from the efficiency at full load, it is quantitatively highlighted how the efficiency at 3 4 and 1 2 of the full load is affected [20]. The convenience of adopting any of the constructive variants will be influenced by the logistical aspects of material availability and, especially, the economic factors.…”

Section: Application Example: Efficiency Improvement Strategymentioning

confidence: 99%

Influence of Equivalent Circuit Resistances on Operating Parameters on Three-Phase Induction Motors with Powers up to 50 kW

Torrent¹,

Blanqué²

2021

Energies

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This work shows the results obtained from studying the influence of equivalent circuit resistances on three-phase induction motors. The stator resistance, rotor resistance, and iron losses resistance affect the different motor operating variables (output power, current, speed, power factor, starting ratios, and maximum torque). These influences have been quantified, paying particular attention to the losses affected and their impact on efficiency. The study carried out does not apply optimization techniques. It evaluates the different influences of the equivalent circuit’s different resistances on its operation by evaluating applicable constructive modifications concerning available motors. The work has been limited to three-phase induction motors up to 50 kW and low voltage, with the nominal powers of the selected motors being 0.25 kW, 1.5 kW, 7.5 kW, 22 kW, and 45 kW. The tools used to carry out the study are analyzing the equivalent circuit and the simulation of the electromagnetic structure using a finite-element program. The variations proposed in each resistance for all the motors studied is not purely theoretical, as it is based on applying feasible constructive modifications, appropriately analyzed and simulated. These modifications are the variation of the conductor diameter in the stator coils, the change of the section of the rotor cage, and the selection of different ferromagnetic steel types.

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Study the effects of no nominal conditions on the performance of high efficiency induction motor

Cited by 5 publications

References 5 publications

Replacing Induction Motors without Defined Efficiency Class by IE Class: Example of Energy, Economic, and Environmental Evaluation in 1.5 kW—IE3 Motors

Replacing Induction Motors without Defined Efficiency Class by IE Class: Example of Energy, Economic, and Environmental Evaluation in 1.5 kW—IE3 Motors

Evaluation of the behaviour of an induction motor for fan system under various external factors

Influence of Equivalent Circuit Resistances on Operating Parameters on Three-Phase Induction Motors with Powers up to 50 kW

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