Rotor Design of Line-Start Synchronous Reluctance Machine With Round Bars

Kersten, Anton; Liu, Yujing; Pehrman, Daniel; Thiringer, Torbjörn

doi:10.1109/tia.2019.2914010

Cited by 36 publications

(27 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Q BEP denotes the flow at the best efficient point (BEP), and H BEP denotes the pump head at BEP. The calculation was performed for three different four-pole electric motors with the rated power of 4 kW, namely LS-SynRM (a test prototype [28]), LS-PMSM (manufacturer WEG [47]) and IE3 efficiency class induction motor (IM, manufacturer WEG [48]). For the serially produced LS-PMSM and IM, datasheets on their efficiency are used.…”

Section: Evaluating Pump Energy Consumptionmentioning

confidence: 99%

See 1 more Smart Citation

Life Cycle Energy Cost Assessment for Pump Units with Various Types of Line-Start Operating Motors Including Cable Losses

et al. 2020

View full text Add to dashboard Cite

The paper presents a comparative analysis of life-cycle energy consumption for three different types of 4 kW line-start motors used in a pump unit with throttling: the most widely used induction motor with IE3 efficiency class, line start permanent magnet synchronous motor with IE4 efficiency class and line start synchronous reluctance motor with IE4 efficiency class. The operating cycle for pump units with constant flow is considered for the above-mentioned types of motors taking into account not only the losses in the pump and motor, but also in the power supply cable. It is shown that the line start synchronous reluctance motor without magnets has the highest efficiency over the entire considered loading range. However, its power factor is lower than that of the synchronous motor with magnets and therefore it has more significant losses in power supply cable. Despite this disadvantage, the line-start reluctance motor is a good alternative to widespread induction motor since it allows saving of approximately 4000 euro more than the latter during the 20 years life cycle. It also provides similar savings in comparison to the permanent magnet synchronous motor, but unlike it, it does not have costly rare-earth materials in the rotor.

show abstract

Section: Evaluating Pump Energy Consumptionmentioning

confidence: 99%

“…For IM and LS-PMSM, the data from manufacturers datasheets are used [47,48]. Since LS-SynRMs of high energy efficiency classes are not yet mass-produced, the experimental data for LS-SynRM are taken from the article [28]. More specifically, the data on the efficiency and power factor of the motors are used in the present analysis.…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Energy Cost Assessment for Pump Units with Various Types of Line-Start Operating Motors Including Cable Losses

et al. 2020

View full text Add to dashboard Cite

show abstract

“…As the electrical machine industry is developing, electric energy consumption has been increasing. In industrial applications, electric motors account for energy consumption between 35% and 40% [1][2][3]. If the efficiency of the electric motor is low, environmental problems such as emission of greenhouse gases are induced.…”

Section: Introductionmentioning

confidence: 99%

“…Induction motors (IMs) account for 70% of industrial motors because of their simple structure and low manufacture cost [1][2][3]. However, IMs have the secondary copper loss that limits the improvement in their efficiency [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Study on Line-Start Permanent Magnet Assistance Synchronous Reluctance Motor for Improving Efficiency and Power Factor

Kim

Park

Liu³

et al. 2020

Energies

View full text Add to dashboard Cite

In order to improve the efficiency, a line-start synchronous reluctance motor (LS-SynRM) is studied as an alternative to an induction motor (IM). However, because of the saliency characteristic of SynRM, LS-SynRM have a limited power factor. Therefore, to improve the efficiency and power factor of electric motors, we propose a line-start permanent magnet assistance synchronous reluctance motor (LS-PMA-SynRM) with permanent magnets inserted into LS-SynRM. IM and LS-SynRM are selected as reference models, whose performances are analyzed and compared with that of LS-PMA-SynRM using a finite element analysis. The performance of LS-PMA-SynRM is analyzed considering the position and length of its permanent magnet, as well as its manufacture. The final model of LS-PMA-SynRM is designed for improving the efficiency and power factor of electric motors compared with LS-SynRM. To verify the finite element analysis (FEA) result, the final model is manufactured, experiments are conducted, and the performance of LS-PMA-SynRM is verified.

show abstract

“…To solidify the possibility to replace the SCIMs with line-start SynRMs, several good work have ASTESJ ISSN: 2415-6698 sought to compare the performance between the three-phase SCIM and three-phase SynRM with cage bars on the rotor, for various applications [3][4][6][7]. The Rotor design and dynamic equations that govern the performance of line-start SynRM with round copper bars are investigated in [8]. The dynamic model and transient analysis of line-start SynRM with copper bars in flux barriers are reported in [9] and [10].…”

Section: Introductionmentioning

confidence: 99%

Transient Analysis of a Line-Start Synchronous Reluctance Motor with Symmetrical Distributed Brass Rotor Bars

Muteba¹

2020

Adv. sci. technol. eng. syst. j.

View full text Add to dashboard Cite

In this paper, the performance evaluation of a line-start three-phase Synchronous Reluctance Motor (SynRM) with symmetrical distributed brass rotor bars is presented. The machine, which has been designed from a conventional three-phase induction motor (IM) NEMA frame stator is proposed as an alternative to a squirrel cage induction motor (SCIM). The 2D Finite Element Analysis (FEA) under ac magnetic transient solution was used to study some performance parameters of interest during starting transients. The experimental measurements were carried out in order to validate the numerical computation, to analyze the starting transients, and to explore the dynamic responses due to load variations. The FEA and experimental results of the synchronous reluctance motor with brass rotor bars (SynRM-BRBs) are compared to the results of a conventional threephase SCIM of the same NEMA frame stator. The results evidenced that the reluctance torque developed by the SynRM-BRBs has a compounding effect on the accelerating torque, reaching its steady-state operational condition faster than the SCIM. The dynamic response of the SynRM-BRBs is faster in contrast to the SCIM during load variations. Furthermore, it was noted through measured results that the proposed line-start three-phase SynRM had a reduced dynamic no-load, and load current as opposed to the SCIM, thus positioning itself as a good candidate to replace the SCIM in applications that require a line-start ac motor with good starting transients and fast dynamic responses.

show abstract

Rotor Design of Line-Start Synchronous Reluctance Machine With Round Bars

Cited by 36 publications

References 29 publications

Life Cycle Energy Cost Assessment for Pump Units with Various Types of Line-Start Operating Motors Including Cable Losses

Life Cycle Energy Cost Assessment for Pump Units with Various Types of Line-Start Operating Motors Including Cable Losses

Study on Line-Start Permanent Magnet Assistance Synchronous Reluctance Motor for Improving Efficiency and Power Factor

Transient Analysis of a Line-Start Synchronous Reluctance Motor with Symmetrical Distributed Brass Rotor Bars

Contact Info

Product

Resources

About