A Review of the Methods for Improving the Efficiency of Drive Motors to Meet IE4 Efficiency Standards

Dorrell, David G.

doi:10.6113/jpe.2014.14.5.842

Cited by 32 publications

(11 citation statements)

References 26 publications

(25 reference statements)

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“…Similarly, References 16, 17 presented the motor performance and method for determining the efficiency based on the operational parameters, that is, load ratio and speed ratio. The reduction in the efficiency of VFD fed motor under variable loading has been investigated in References 17, 18 and methods for the improvement of the efficiency of VFD systems have been studied in Reference 19.…”

Section: Literature Review and Main Contributionmentioning

confidence: 99%

Optimum operation of low voltage variable‐frequency drives to improve the performance of heating, ventilation, and air conditioning chiller system

Hassan

Mahmood

Akmal

et al. 2020

Int Trans Electr Energ Syst

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Summary A tremendous increase in the industrial and commercial applications of low voltage variable frequency drives (VFD) has been observed in the last decade. VFD are mainly used for energy saving and reliable speed control of industrial motors in an electrical system. However, power quality issues are becoming more apparent due to the installation of VFD. In this paper, a nonintrusive technique has been employed to determine the optimum operation of VFD system for improving the performance of heating, ventilation, and air conditioning centrifugal chiller system. The effect of load and speed ratios of VFD systems on total harmonic distortion (THD), power factor, distortion loss ratio, temperature, and efficiency has been investigated. The measurement of these parameters has been carried out by performing a series of experiments under variable operating conditions. The binomial relations have been developed between the various performance parameters and the operating conditions. Based on experimental results, optimum operating conditions have been proposed and implemented for the VFD system. Moreover, the results have been compared with the existing operating conditions and indicate a considerable improvement in THD, power factor, distortion loss ratio, efficiency, and the annual cost of energy consumed.

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Section: Literature Review and Main Contributionmentioning

confidence: 99%

Optimum operation of low voltage variable‐frequency drives to improve the performance of heating, ventilation, and air conditioning chiller system

Hassan

Mahmood

Akmal

et al. 2020

Int Trans Electr Energ Syst

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“…They claim that their efficiency cannot be enhanced over the ordinary ratings and thus it will be difficult for them to exhibit an efficiency of IE3 according to the latest industrial standards. 30 On the other hand, the preliminary results of an authors' recent research effort (ie, Reference 31) indicate that the capacitor-run SPIM's axial effective length increment along with the incorporation of die-cast copper squirrel-cages benefits its efficiency toward IE3. The SPIMs topologies (developed in Reference 31) presented the desirable efficiency, but not adequate starting torque.…”

Section: Literature Review Industrial Standards and Motivation Of Tmentioning

confidence: 99%

“…This observation reinforces the “strong” opinion of many researchers about the future SPIMs efficiency levels. They claim that their efficiency cannot be enhanced over the ordinary ratings and thus it will be difficult for them to exhibit an efficiency of IE3 according to the latest industrial standards 30 . On the other hand, the preliminary results of an authors' recent research effort (ie, Reference 31) indicate that the capacitor‐run SPIM's axial effective length increment along with the incorporation of die‐cast copper squirrel‐cages benefits its efficiency toward IE3.…”

Section: Introductionmentioning

confidence: 99%

A novel design methodology for the compliance of single phase induction motors with recent industrial premium efficiency standards

Chasiotis

Karnavas

2020

Engineering Reports

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The single-phase induction motors (SPIMs) are widely used in several household and industrial applications and thus millions of them are produced every year. Despite the fact that their output power is low, their efficiency enhancement could lead to significant energy savings. The SPIMs are included to the new industrial efficiency standards for commercial motors. Consequently, the minimum efficiency that the SPIMs have to present is that of IE3 (premium-efficiency). The already conducted research efforts have not provided a robust and acceptable-from economical and manufacturing point of view-design procedure toward their efficiency improvement. For this purpose, a novel design methodology is proposed here. It is proven that the required efficiency ratings are achievable with the increment of the motor's axial length, the proper design of the rotor bar slot and the careful selection of the auxiliary to main winding turns ratio along with the value of the used capacitor. Aiming to verify its effectiveness, the presented methodology has been applied to SPIMs with different output power ratings. Moreover, the derived results are compared to the corresponding ones obtained from other design strategies. The motor's nominal performance and its behavior during the start-up phase have been determined through finite element analysis.

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“…EW VARIABLE-SPEED drives with improved-design synchronous reluctance machines are now be capable of reaching high efficiency, even up to the IE4 level [1]. Such machines have been studied for many years and significant progress was made in the 1990s using axial laminations in the rotor [2].…”

Section: Introductionmentioning

confidence: 99%

Establishing the Power Factor Limitations for Synchronous Reluctance Machines

et al. 2015

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This paper discusses a "Goodness" index and introduces a "Badness" factor for electric machines with special reference to synchronous reluctance motors. This factor is then used in conjunction with computationally-efficient finite element electromagnetic analysis and a differential evolution optimization algorithm in order to carry out a large-scale design study under comparable specifications with an induction motor. It is shown that for synchronous reluctance machines, careful rotor geometry optimization can improve the performance and that the inherent limitations, including those for the power factor, can be systematically established. The correlations for specific average torque, copper and core losses, and efficiency are also discussed.

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A Review of the Methods for Improving the Efficiency of Drive Motors to Meet IE4 Efficiency Standards

Cited by 32 publications

References 26 publications

Optimum operation of low voltage variable‐frequency drives to improve the performance of heating, ventilation, and air conditioning chiller system

Optimum operation of low voltage variable‐frequency drives to improve the performance of heating, ventilation, and air conditioning chiller system

A novel design methodology for the compliance of single phase induction motors with recent industrial premium efficiency standards

Establishing the Power Factor Limitations for Synchronous Reluctance Machines

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