Experimental characterization and modeling of thermal resistance of electric machine lamination stacks

Cousineau, J. Emily; Bennion, Kevin; DeVoto, Douglas; Narumanchi, Sreekant

doi:10.1016/j.ijheatmasstransfer.2018.09.051

Title: Experimental characterization and modeling of thermal resistance of electric machine lamination stacks

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Abstract

There is lack of information in the open literature on thermal properties of electric machine lamination stacks such as contact resistance and effective thermal conductivity, yet this information is critical for researchers and engineers in electric machine design and development. The thermal conductivity of electromagnetic steel lamination materials was measured, and the thermal contact resistance between laminations in a stack, as well as factors affecting contact resistance between laminations - such as the contact pressure and surface finish - were investigated. A model was also developed to estimate the through-stack thermal conductivity for materials beyond those that were directly tested in this work. Four lamination materials were investigated, including the commonly-used 26-gauge and 29-gauge M19 materials, the HF10, and Arnon 7 materials. Although this paper focuses on electric machines for automotive applications, the information is potentially applicable to any component utilizing electromagnetic steel laminations.

Authors:

Cousineau, J. Emily ^[1]; Bennion, Kevin ^[1]; DeVoto, Douglas ^[1]; Narumanchi, Sreekant ^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)

Publication Date:: 2018-09-27

Research Org.:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE

OSTI Identifier:: 1476248

Alternate Identifier(s):: OSTI ID: 1642261

Report Number(s):: NREL/JA-5400-72397
Journal ID: ISSN 0017-9310

Grant/Contract Number:: AC36-08GO28308

Resource Type:: Accepted Manuscript

Journal Name:: International Journal of Heat and Mass Transfer

Additional Journal Information:: Journal Volume: 129; Journal Issue: C; Journal ID: ISSN 0017-9310

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 30 DIRECT ENERGY CONVERSION; electric machine; energy efficiency; stator; thermal conductivity; thermal contact resistance; steel lamination

Citation Formats


                    Cousineau, J. Emily, Bennion, Kevin, DeVoto, Douglas, and Narumanchi, Sreekant. Experimental characterization and modeling of thermal resistance of electric machine lamination stacks.  United States: N. p., 2018. 
Web.  doi:10.1016/j.ijheatmasstransfer.2018.09.051.

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                    Cousineau, J. Emily, Bennion, Kevin, DeVoto, Douglas, & Narumanchi, Sreekant. Experimental characterization and modeling of thermal resistance of electric machine lamination stacks.  United States.  https://doi.org/10.1016/j.ijheatmasstransfer.2018.09.051

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                    Cousineau, J. Emily, Bennion, Kevin, DeVoto, Douglas, and Narumanchi, Sreekant. Thu .  
"Experimental characterization and modeling of thermal resistance of electric machine lamination stacks".  United States.  https://doi.org/10.1016/j.ijheatmasstransfer.2018.09.051.  https://www.osti.gov/servlets/purl/1476248.

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@article{osti_1476248,

  title        = {Experimental characterization and modeling of thermal resistance of electric machine lamination stacks},

  author       = {Cousineau, J. Emily and Bennion, Kevin and DeVoto, Douglas and Narumanchi, Sreekant},

  abstractNote = {There is lack of information in the open literature on thermal properties of electric machine lamination stacks such as contact resistance and effective thermal conductivity, yet this information is critical for researchers and engineers in electric machine design and development. The thermal conductivity of electromagnetic steel lamination materials was measured, and the thermal contact resistance between laminations in a stack, as well as factors affecting contact resistance between laminations - such as the contact pressure and surface finish - were investigated. A model was also developed to estimate the through-stack thermal conductivity for materials beyond those that were directly tested in this work. Four lamination materials were investigated, including the commonly-used 26-gauge and 29-gauge M19 materials, the HF10, and Arnon 7 materials. Although this paper focuses on electric machines for automotive applications, the information is potentially applicable to any component utilizing electromagnetic steel laminations.},

  doi          = {10.1016/j.ijheatmasstransfer.2018.09.051},

  journal      = {International Journal of Heat and Mass Transfer},

  number       = C,

  volume       = 129,

  place        = {United States},

  year         = {2018},

  month        = {9}

}

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