Electromagnetic analysis and experimental testing of a flux focusing wind turbine magnetic gearbox

Li, Kang; Modaresahmadi, Sina; Williams, Wesley; Bird, Jonathan; Wright, Jason; Barnett, David

doi:10.1109/TEC.2019.2911966

Title: Electromagnetic analysis and experimental testing of a flux focusing wind turbine magnetic gearbox

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Abstract

The electromagnetic design of the second stage of a 59:1 multistage magnetic gearbox for a wind turbine demonstrator is presented here. The multistage series connected magnetic gearbox is composed of a 6.45:1 first stage and 9.14:1 second stage magnetic gear. The magnetic gears utilize a flux focusing spoke type rotor typology with a unique segmented fully laminated design. The electromagnetic impact of structural design changes on the second stage gearbox is considered with respect to torque density. Severe 3-D edge effects were encountered that greatly reduced the expect torque density of the stage 2 magnetic gear. Experimental testing of the multistage magnetic gear highlight unexpected problems associated with eddy current loss and torque ripple.

Authors:

Li, Kang ^[1]; Modaresahmadi, Sina ^[1]; Williams, Wesley ^[1]; Bird, Jonathan ^[2]; Wright, Jason ^[1]; Barnett, David ^[1]

Univ. of North Carolina, Charlotte, NC (United States)
Portland State Univ., Portland, OR (United States). Lab. for Electromechanical Energy Conversion and Control

Publication Date:: Mon Apr 15 00:00:00 EDT 2019

Research Org.:: Univ. of North Carolina, Charlotte, NC (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office

OSTI Identifier:: 1505682

Grant/Contract Number:: EE0006801

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Energy Conversion

Additional Journal Information:: Journal Volume: 34; Journal Issue: 3; Journal ID: ISSN 0885-8969

Publisher:: IEEE

Country of Publication:: United States

Language:: English

Subject:: 17 WIND ENERGY; gears; permanent magnet machines; magnetic flux density; magnetic forces; permanent magnets; torque

Citation Formats


                    Li, Kang, Modaresahmadi, Sina, Williams, Wesley, Bird, Jonathan, Wright, Jason, and Barnett, David. Electromagnetic analysis and experimental testing of a flux focusing wind turbine magnetic gearbox.  United States: N. p., 2019. 
Web.  doi:10.1109/TEC.2019.2911966.

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                    Li, Kang, Modaresahmadi, Sina, Williams, Wesley, Bird, Jonathan, Wright, Jason, & Barnett, David. Electromagnetic analysis and experimental testing of a flux focusing wind turbine magnetic gearbox.  United States.  https://doi.org/10.1109/TEC.2019.2911966

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                    Li, Kang, Modaresahmadi, Sina, Williams, Wesley, Bird, Jonathan, Wright, Jason, and Barnett, David. Mon .  
"Electromagnetic analysis and experimental testing of a flux focusing wind turbine magnetic gearbox".  United States.  https://doi.org/10.1109/TEC.2019.2911966.  https://www.osti.gov/servlets/purl/1505682.

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@article{osti_1505682,

  title        = {Electromagnetic analysis and experimental testing of a flux focusing wind turbine magnetic gearbox},

  author       = {Li, Kang and Modaresahmadi, Sina and Williams, Wesley and Bird, Jonathan and Wright, Jason and Barnett, David},

  abstractNote = {The electromagnetic design of the second stage of a 59:1 multistage magnetic gearbox for a wind turbine demonstrator is presented here. The multistage series connected magnetic gearbox is composed of a 6.45:1 first stage and 9.14:1 second stage magnetic gear. The magnetic gears utilize a flux focusing spoke type rotor typology with a unique segmented fully laminated design. The electromagnetic impact of structural design changes on the second stage gearbox is considered with respect to torque density. Severe 3-D edge effects were encountered that greatly reduced the expect torque density of the stage 2 magnetic gear. Experimental testing of the multistage magnetic gear highlight unexpected problems associated with eddy current loss and torque ripple.},

  doi          = {10.1109/TEC.2019.2911966},

  journal      = {IEEE Transactions on Energy Conversion},

  number       = 3,

  volume       = 34,

  place        = {United States},

  year         = {Mon Apr 15 00:00:00 EDT 2019},

  month        = {Mon Apr 15 00:00:00 EDT 2019}

}

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