Electrical machines insulation: Towards low environmental impact solutions

Boughamni, Walid; Manata, Jean-Paul; Ait-Amar, S.; Roger, Daniel

doi:10.1109/icsd.2013.6619762

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…These are particularly important in identification of the winding hot-spot. It is important to note that the thermal anisotropy is frequently neglected in thermal analysis of electrical machines where a lower resolution or coarse modelling approach is employed [1]- [3], [34]- [36], [57]- [59]. Fig.…”

Section: A Materials Thermal Datamentioning

confidence: 99%

“…The main advantage of tests on stator assembly is that it allows one to account for the interaction between phases. Dc tests are nonetheless frequently employed for the determination of the thermal parameters [33]- [37], for example in the context of material comparison [35], [36]. At first glance, building a full stator for the evaluation of the thermal parameters might seem both time-consuming and costly as compared with building a single-coil motorette assembly.…”

Section: Stator Assemblymentioning

confidence: 99%

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Experiment informed methodology for thermal design of PM machines

Ayat

Wróbel

Goss

et al. 2016

2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER)

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The common approach used in the thermal design of electrical machines is calibrating thermal models based on the designer's previous experience, or hardware tests on a prototype machine. This allows for various manufacture and assembly nuances to be accounted for in the design process, assuring accurate and computationally efficient predictions of the machine thermal behaviour. The post-manufacture calibration of thermal models from tests on a complete machine has limited use in development of machine topologies, where no previous experience or machine hardware exist. In this context, an experiment informed design technique that makes use of reduced order machine sub-assemblies presents an attractive alternative. In particular, the hardware manufacture cost and time is significantly reduced compared to the prototyping of the complete machine assembly. This allows for numerous hardware samples to be constructed and tested, to inform the machine design process. The use of the machine sub-assembly testing is focused, but not limited to identifying and quantifying various power loss and heat transfer phenomena. This paper reviews the applicability of the sub-assembly testing in a broader context of the machine design. The aim of the research focuses on formulating a basis for sub-assembly based, experiment informed methodology for the thermal design of electrical machines.

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Section: A Materials Thermal Datamentioning

confidence: 99%

Section: Stator Assemblymentioning

confidence: 99%

Experiment informed methodology for thermal design of PM machines

Ayat

Wróbel

Goss

et al. 2016

2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER)

View full text Add to dashboard Cite

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Life cycle assessment of electric motors - A systematic literature review

de Souza,

da Silva,

Sauer

et al. 2024

Journal of Cleaner Production

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Characterising the performance of selected electrical machine insulation systems

Wróbel

Williamson

Booker

et al. 2015

2015 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-This paper presents results from an analysis of alternative slot liner materials used in the construction of electrical machines. The slot liner material has a vital safety critical function within a machine assembly, providing electrical insulation between the winding body and stator core pack. Performance measures for the slot liner material include the dielectric breakdown voltage, tensile strength, thermal conductivity and thermal class, amongst others. There is a large variety of slot liner materials available on the market with the material properties altered to suit a particular application. Some of these material properties are strongly dependent on the components and processes employed in construction of the complete winding assembly e.g. type of the winding impregnation and/or method used in impregnation of the stator/winding assembly. Consequently, the manufacturer provided data is usually inadequate when comparing various insulation systems and their individual elements for a particular machine construction. This research is focused on the conductive heat transfer phenomenon from the winding body into the machine periphery in context of the slot liner material used, for a given impregnation type and method. The repeatability of the winding manufacture process is also investigated. Three alternative slot liner materials with different thermal conductivity and ability of absorbing varnish impregnation have been chosen for prototyping of representative stator/winding hardware exemplars. This has been supplemented with a batch manufacture of the stator-winding hardware exemplar for a selected slot liner material. The proposed experimental approach allows for the complete insulation system to be evaluated accounting for the assembly and manufacture nuances. The results suggest that the use of a particular slot liner has an impact on the winding heat transfer and also implications regarding appropriate manufacture and assembly processes used, i.e. some of the materials require special handling. The experimental work has been supplemented with theoretical analysis to provide a more comprehensive insight into the winding heat transfer phenomena.

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Electrical machines insulation: Towards low environmental impact solutions

Cited by 6 publications

References 5 publications

Experiment informed methodology for thermal design of PM machines

Experiment informed methodology for thermal design of PM machines

Life cycle assessment of electric motors - A systematic literature review

Characterising the performance of selected electrical machine insulation systems

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