Performance analysis of three phase induction motor using different magnetic slot wedges

Lavanya, M.; Selvakumar, P.; Vijayshankar, Sanjana; Easwarlal, C.

doi:10.1109/icees.2014.6924161

Cited by 11 publications

(7 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This behavior leads to an improvement of the motor efficiency but also to a lower power factor at the rated speed. The performances of a 2.2 kW induction motor with magnetic wedges of different permeability were evaluated in [19] by FE analysis. The authors concluded that this solution improves the motor performance, even if it tends to decrease drastically when µ r > 20, as most of the flux lines is shorted in the wedges.…”

Section: State Of the Art Of The Magnetic Wedges Employed In Rotatingmentioning

confidence: 99%

Analysis and Design of Innovative Magnetic Wedges for High Efficiency Permanent Magnet Synchronous Machines

Frosini

Pastura

2020

Energies

View full text Add to dashboard Cite

The global decarbonization targets require increasingly higher levels of efficiency from the designers of electrical machines. In this context, the opportunity to employ magnetic or semi-magnetic wedges in surface-mounted permanent magnet machines with fractional-slot concentrated winding has been evaluated in this paper, with the aim to reduce the power losses, especially in the magnets. Since an analytical calculation is not sufficient for this evaluation, finite element methods with two different software have been employed, by using a model experimentally validated on a real motor. The effects of wedges with different values of permeability and different magnetization characteristics have been evaluated on flux density, back electromotive force, and inductances, in order to choose the more suitable wedge for the considered motor. Furthermore, a new wedge consisting of different portions of materials with different magnetic permeability values is proposed. The effects of both conventional and unconventional magnetic wedges were assessed to optimize the motor performance in all working conditions.

show abstract

Section: State Of the Art Of The Magnetic Wedges Employed In Rotatingmentioning

confidence: 99%

Analysis and Design of Innovative Magnetic Wedges for High Efficiency Permanent Magnet Synchronous Machines

Frosini

Pastura

2020

Energies

View full text Add to dashboard Cite

show abstract

“…It is shown that by adding the magnetic slot wedge, the electric loss can be reduced, the overall efficiency can be improved, the winding temperature rise can be reduced, the motor vibration and noise level can be greatly reduced, and the motor service life can be prolonged. Lavanya et al studied the performance of three‐phase induction motor when magnetic slot wedges of different permeabilities are inserted in stator slots, and they reveal that materials with higher relative permeability could reduce a motor's output performance. In another study, the influence of magnetic slot wedge on eddy‐current loss and temperature rise of high‐voltage solid rotor permanent magnet synchronous motor (PMSM) is researched by Weili et al And a new stator slot wedge made of magnetic and electric conductive alloy is presented.…”

Section: Introductionmentioning

confidence: 99%

Influence of magnetic slot wedge on the performance of 10‐kV, 1000‐kW permanent magnet synchronous motor

Qiu

Liu

et al. 2020

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary Because of uneven air‐gap magnetic field caused by open slots in stator cores, motor performance is influenced by harmonic magnetic field in air‐gap. In this paper, a 10‐kV, 1000‐kW line‐start high‐voltage permanent magnet synchronous motor (LS‐HV‐PMSM) is taken as an example to establish finite element models when the magnetic slot wedge relative permeability is different. The influence of using the magnetic slot wedge on a motor's torque ripple, loss, and starting performance is studied. On the basis of the analysis of the torque ripple coefficient, the influence of the magnetic slot wedge relative permeability on torque ripple is obtained. Using the finite element method, the influence of the magnetic slot wedge relative permeability on a motor's loss is studied. It is found that the rotor cage bar eddy‐current loss is changed obviously. The relationship between the rotor cage bar eddy‐current loss and rotor cage bar current density is determined. Furthermore, the influence mechanism of rotor cage bar current density on rotor cage bar eddy‐current loss is revealed. According to the speed change curve, the starting performance of the LS‐HV‐PMSM is analyzed, and the influence of slot leakage reactance on a motor's starting performance is obtained. On the basis of the above analysis, some references are obtained for choosing the magnetic slot wedge with suitable relative permeability when the LS‐HV‐PMSM is designed.

show abstract

“…Magnetic slot wedges are often applied to eliminate field harmonics in large machines, such as hydro-generators and induction machines, since skewed slots are too technologically complicated. In the literature, there are many reports about the use of magnetic wedges dealing with the influence of open slots [10][11][12][13][14][15]. The effects of stator magnetic slot wedges on different types permanent magnet machines are discussed in [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…The effects of stator magnetic slot wedges on different types permanent magnet machines are discussed in [10,11]. The literature [13] compares the influence of wedge types on the performance of an induction motor. Practical application of stator magnetic slot wedges on a salient-pole synchronous hydrogenerator is reported in [15].…”

Section: Introductionmentioning

confidence: 99%

Design and performance analysis of magnetic slot wedge application in double‐fed asynchronous motor‐generator by finite‐element method

Xiao

Zhou

Wang

et al. 2018

IET Electric Power Applications

View full text Add to dashboard Cite

In this study, an improvement method for double-fed asynchronous motor-generators (DFAMG) design with open slots is proposed to reduce the capacity demand of rotor converter for the first time. The proposed method is achieved by decreasing the air-gap length (AGL) and applying conductive and magnetic rotor slot wedges. The design method of magnetic slot wedges and AGL in large DFAMG is presented. The mechanical analysis of a large DFAMG prototype reveals the necessity of using metal rotor wedges. To precisely investigate the influence of magnetic wedges in DFAMG, a two-dimensional fieldcircuit coupled model is proposed to consider the effects of rotor converter. Several wedge configurations of commercially available products are designed and analysed. The relationships between the electromagnetic properties of rotor wedges and prototype performance are investigated. The feasibility and advantage of the proposed method in DFAMG design are verified. A guidance for applying the proposed method in design improvement of large DFAMG is developed.

show abstract

Performance analysis of three phase induction motor using different magnetic slot wedges

Cited by 11 publications

References 4 publications

Analysis and Design of Innovative Magnetic Wedges for High Efficiency Permanent Magnet Synchronous Machines

Analysis and Design of Innovative Magnetic Wedges for High Efficiency Permanent Magnet Synchronous Machines

Influence of magnetic slot wedge on the performance of 10‐kV, 1000‐kW permanent magnet synchronous motor

Design and performance analysis of magnetic slot wedge application in double‐fed asynchronous motor‐generator by finite‐element method

Contact Info

Product

Resources

About