Fast Circuit-Field Coupling Analysis for Skewed Induction Motor

Meng, Fanqing; Wang, Dong; Liu, Zhixin; Su, Wu

doi:10.1109/tie.2020.2988238

Cited by 7 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An FEM validation is performed using the finite element magnetics software FEMM 4.2 (Meeker, 2009). Figure 2 shows the FEM model and flux density.…”

Section: Finite Element Methods Validationmentioning

confidence: 99%

“…Rotor skewing is a common practice as it reduces the harmonics in the stator current and electromagnetic torque (Kawase et al , 2009). Accurate modelling of rotor skew in MEC models generally either (i) joins multiple unskewed MEC slices with progressively rotated rotors which are constrained by equal axial currents in a method called multislicing (Meng et al , 2021; Wang et al , 2015) or (ii) forms a fully 3D MEC using a permeance network that extends itself both radially and axially (Faiz et al , 2015; Alipour-Sarabi et al , 2020). While such complex methods can model the effects of axial flux, this comes at a computational cost, diminishing the advantage of MECs.…”

Section: Introductionmentioning

confidence: 99%

“…compared to a reference method (Ostovic, 1989) and validated using the software FEMM 4.2 (Meeker, 2009). The peak permeance increase caused by flux fringing is visible when compared to the reference method.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Improved air gap permeance modelling for single-slice magnetic equivalent circuits of skewed induction motors

Desenfans,

Gong,

Vanoost

et al. 2024

COMPEL

View full text Add to dashboard Cite

Purpose When rotor and stator teeth are close, the connecting air gap flux tube's cross-sectional area exceeds the tooth overlap area. This flux fringing effect is disregarded in the air gap permeance calculation of single-slice magnetic equivalent circuits (MECs) of electric motors with skewed rotors. This paper aims to extend an air gap permeance calculation method incorporating flux fringing for unskewed rotors to skewed and radially eccentric rotors. Design/methodology/approach Assuming axial independence, the unskewed air gap permeance is rotated according to the skew and integrated along the axial dimension, resulting in a first method. The integral is approximated analytically, resulting in a second method. Results are compared to a commonly used reference method and validated using a non-linear finite element method (FEM) simulation. Findings The proposed methods provide better alignment with the FEM validation compared to the reference method for skewed rotors and common rotor eccentricity, i.e. below 50% of the air gap length. The analytical method is shown to be competitive with the reference method regarding computational time cost. Originality/value Two novel air gap permeance methods are proposed for single-slice MECs with skewed rotors. Their characteristics are discussed and validated.

show abstract

“…An FEM validation is performed using the finite element magnetics software FEMM 4.2 (Meeker, 2009). Figure 2 shows the FEM model and flux density.…”

Section: Finite Element Methods Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improved air gap permeance modelling for single-slice magnetic equivalent circuits of skewed induction motors

Desenfans,

Gong,

Vanoost

et al. 2024

COMPEL

View full text Add to dashboard Cite

show abstract

“…Analytical methods [30,31] and electromagnet finite element analysis [32] can be used to assess saturation in machines. Here, equivalent circuit models are used for machine performance assessment over a variety of machines.…”

Section: Effects Of Saturationmentioning

confidence: 99%

Reduction of Starting Current in Large Induction Motors

Habyarimana

Dorrell

Musumpuka³

2022

Energies

View full text Add to dashboard Cite

Large induction motors can have a high inrush and run-up current during starting, often up to ten times the rated current. In weak supplies, this could be a problem, causing system stability issues and the voltage to dip below acceptable levels. In islanded systems, the capacity could be pulled below its maximum. There are several different starting methods possible, but they are often only suitable for smaller machines. One method not investigated is the use of parallel capacitor compensation during the starting because large induction motors are very inductive during the starting sequence, so that supplying reactive power may be more effective than supplying energy. This paper first investigates several different induction motors with increasing size and assesses their compensation requirements in terms of the reactive power requirement during starting. It is shown that they do generally become more inductive as they increase in size. It is illustrated, using simulations, that using parallel capacitors during starting can significantly reduce the starting current. The concept is tested using a small experimental motor. Series inductors are added to the motor to make it more inductive and look more like a larger machine. The experimental results confirm that the method works. It is also found that the parallel capacitors require series filters to prevent harmonic current, and these can be realized using inductors in series with the compensation capacitors. Point-on switching using solid-state relays was tested, and these can reduce the transient switch-on current over the first voltage cycle.

show abstract