Estimation of Equivalent Thermal Parameters of Impregnated Electrical Windings

Simpson, Nick; Wróbel, Rafał; Mellor, P.H.

doi:10.1109/tia.2013.2263271

Cited by 250 publications

(146 citation statements)

References 21 publications

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“…To aid this process and prevent unrealistic calibration solutions, material test data from [30] is used as a guide. The calibration was carried out using the experimental data from the highest value of current each motorette could handle.…”

Section: A Motorette Thermal Modelmentioning

confidence: 99%

Experimentally Calibrated Thermal Stator Modeling of AC Machines for Short-Duty Transient Operation

Godbehere

Wróbel

Drury

et al. 2017

IEEE Trans. on Ind. Applicat.

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Section: A Motorette Thermal Modelmentioning

confidence: 99%

Experimentally Calibrated Thermal Stator Modeling of AC Machines for Short-Duty Transient Operation

Godbehere

Wróbel

Drury

et al. 2017

IEEE Trans. on Ind. Applicat.

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“…The end-winding dissipative heat transfer is adjusted here to achieve different heat transfer between the active length and endwinding regions. The assumed material equivalent properties account for thermal anisotropy [18], [19]. As the temperature difference between the winding regions depends on the winding power loss, the volumetric power loss generated in the winding region is the same for all the analysed variants, 10 6 W/m 3 .…”

Section: B End-winding Heat Transfer Effectsmentioning

confidence: 99%

A systematic experimental approach in deriving stator-winding heat transfer

Wróbel

Ayat

Godbehere

2017

2017 IEEE International Electric Machines and Drives Conference (IEMDC)

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“…The material thermal data for the laminated core pack and impregnated winding has been derived from measurements using representative material samples [7], [13]. Here, the winding region x and y axes refer to the longer and shorter periphery of conductor cross-section respectively, whereas the z axis is aligned with conductor length.…”

Section: B Thermal Analysismentioning

confidence: 99%

Winding loss separation in thermal analysis of electromagnetic devices

Wróbel

Simpson

2016

2016 XXII International Conference on Electrical Machines (ICEM)

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--This paper investigates various winding loss separation approaches applicable to the thermal analysis of electrical machines, transformers and wound passive components. The accurate temperature prediction and identification of hot-spots within such electromagnetic devices is strongly dependent on the absolute power loss data as well as the loss distribution within the subassemblies or regions of the device. The losses within a device are often defined as the average loss over a particular region, for example, the winding loss, core loss or magnet loss. However, such a loss definition might not yield the required fidelity or resolution, particularly if localised power loss such as ac winding loss is present during device operation. To account for the inhomogeneous winding loss, a more detailed loss separation is required. In this paper, the winding subassembly is subdivided into a number of subregions accounting for both the active length and end-winding. I. INTRODUCTIONHERMAL analysis of electromagnetic devices has become an essential element of the design-development process and is particularly important when considering compact, cost-effective and high-efficiency designs. A detailed insight into the thermal behaviour of a machine prior to the manufacturing stage is particularly desirable as it allows various performance measures to be assessed, for example, the power output capability and the efficiency under the intended operating conditions. However, the accuracy of thermal models is affected by numerous factors, some of which include the thermal material data, power loss data, manufacture and assembly factors, and thermal model formulation [1]- [14]. A reliable thermal model typically requires a degree of calibration and is usually informed from experiments or previous experience. This allows for the manufacture and assembly as well as the operating conditions of a machine design to be accounted for in the Rafal Wrobel is with the Department of Electrical Engineering, the University of Bristol, Bristol, BS8 1TR, UK and with Motor Design Ltd., Ellesmere, SY12 0EG, UK (e-mail: dr.rafal.wrobel@ieee.org) Nick Simpson is with the Department of Electrical Engineering, the University of Bristol, Bristol, BS8 1TR, UK (e-mail: dr.nick.simpson@ieee.org). model definition. Such a thermal model allows for the behaviour of the machine to be predicted at various operating points providing that the appropriate power loss data is available. There are various loss components present within a machine assembly during its operation. In general, these include electromagnetic loss components when considering electromagnetic transducers such as transformers and inductors with the addition of mechanical losses and motion related electromagnetic losses when considering electromechanical machines such as motors and actuators. There is a wide body of work devoted to power loss derivation and separation using both experimental and theoretical approaches [1]-[21]. It is important to note that the experimental loss measureme...

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Estimation of Equivalent Thermal Parameters of Impregnated Electrical Windings

Cited by 250 publications

References 21 publications

Experimentally Calibrated Thermal Stator Modeling of AC Machines for Short-Duty Transient Operation

Experimentally Calibrated Thermal Stator Modeling of AC Machines for Short-Duty Transient Operation

A systematic experimental approach in deriving stator-winding heat transfer

Winding loss separation in thermal analysis of electromagnetic devices

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