End Turn Leakage Reactance of Concentrated Modular Winding Stators

Cox, Tom; Eastham, Fred; Proverbs, J.

doi:10.1109/tmag.2008.2002382

Cited by 21 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Where Z n ′ = jω μ 0 μ y, n / γ n is the characteristic impedance of the layer, and: One important factor to consider in applying this method is to recognise that it is only considering a two-dimensional (2D) situation, this means that the end turn inductance of the winding coils must be taken into account separately. This is done by producing a representative equation from several 3D FE runs [17,18].…”

Section: Analytical Methods (Layer Theory)mentioning

confidence: 99%

Modular airgap windings for linear permanent magnet machines

Colyer¹,

Arumugam²,

Eastham

2018

IET Electric Power Applications

View full text Add to dashboard Cite

This study proposes an offset concentrated wound air-core linear synchronous machine for launch applications where reduced supply volt-amp per newton (VA/N) and attraction force is essential. A winding factor model based on the conductor distribution is derived and used to analyse the winding factor of possible topologies. Two configurations, 3-coil/4-pole and 12coil/14-pole, have high fundamental winding factors and are selected for the design comparisons. Machines using single-and double-sided offset windings are compared. The results obtained for these selected designs show that the 3-coil/4-pole design with offset winding provides the highest thrust due to its higher winding factor, but the 12-coil/14-pole design has lower supply VA/N. The implementation of the offset windings reduces VA/N. A significant reduction can be seen when the long stator short rotor arrangement is considered. A half-segment prototype is built and tested. The experimental results obtained validate both the algebraic and three-dimensional finite element analysis.

show abstract

Section: Analytical Methods (Layer Theory)mentioning

confidence: 99%

Modular airgap windings for linear permanent magnet machines

Colyer¹,

Arumugam²,

Eastham

2018

IET Electric Power Applications

View full text Add to dashboard Cite

show abstract

“…It is notoriously difficult to accurately predict the inductance of the stator end-windings analytically and short axial lengths (as in the case with the demonstrator rim-drive motor) can lead to greater error [36][37]. 3D FEA can be used to calculate more accurate values [38][39][40] but is computationally expensive.…”

Section: Supply Voltage = 240 Vmentioning

confidence: 99%

Rim‐drive marine thruster using a multiple‐can induction motor

Tuohy

Smith

Husband

et al. 2013

IET Electric Power Applications

View full text Add to dashboard Cite

This study presents the development, analysis, manufacture and testing of a demonstrator multiple-can line-start rim-drive induction motor for use as a bi-directional electric thruster on-board a tidal stream turbine. A simple 'canned' rotor construction was used to eliminate the requirement for a conventional squirrel-cage rotor, to minimise the rotor size and weight and improve reliability, all the while providing compatibility with the sub-sea operating environment. The experimental test results on a demonstrator 30 kW rim-drive motor show good agreement with finite-element analysis predicted results.

show abstract

“…Ban et al [19] the end-winding leakage inductance is investigated analytically, and further investigation on the end-winding inductance [20]. Analytical method for leakage inductance considering the end turn shape is proposed in [21], [22]. Calculation methods investigating the effects of the end-winding and end-effect on the machine torque performance in Potgieter and Kamper [23].…”

Section: Introductionmentioning

confidence: 99%

Influence of end-effect and end-winding on the electromagnetic losses and efficiency in high speed permanent magnet machines

Shuraiji

Gitaffa

Hameed

et al. 2022

IJPEDS

View full text Add to dashboard Cite

<span>Permanent-magnet excitation machines (SPMMs) having mounted magnet on the outer surface of their rotor are preferred for high speed applications such as turbochargers, mechanical turbo-compounding systems, racing engines and fuel pumps, over other types of machines including induction and switched-reluctance machines, since the SPMMs integrate the features of high torque density, compact rotor structure, high reliability and simple structure. However, in the SPMMs, due to the need for a retaining sleeve for the rotor, a large magnetic airgap results and consequently a large magnet thickness is required, hence the magnetic end-effect is relatively high. On the other hand, the use of an overlapping distributed winding leads to a significantly large end-winding length. Hence, the end-effect and the end-winding influences on the performances of a high-speed SPMM is considered in this paper. With a view to get the impact of the end-effect, a comparison between three-dimensional (3D-FEA) results and counterparts two-dimensional finite element analyses (2D-FEA) have been conducted. Results show that, higher efficiency at low torque and low speed due to the low electromagnetic losses and at high speeds due to the high flux-weakening capability are seen when the influences of end-effect as well as end-winding are taken into account.</span>

show abstract

End Turn Leakage Reactance of Concentrated Modular Winding Stators

Cited by 21 publications

References 5 publications

Modular airgap windings for linear permanent magnet machines

Modular airgap windings for linear permanent magnet machines

Rim‐drive marine thruster using a multiple‐can induction motor

Influence of end-effect and end-winding on the electromagnetic losses and efficiency in high speed permanent magnet machines

Contact Info

Product

Resources

About