Electromagnetic Design and Assembly Analysis of a Halbach Rotor Magnetic Gear for a Marine Hydrokinetic Application
The authors would gratefully like to thank the JMAG Corporation for the use of their FEA software. This material is based upon work supported by the Department of Energy under grant number DE-EE0008100.
2018 IEEE Energy Conversion Congress and Exposition (ECCE)
This paper presents a new type of hermetically sealed magnetically geared generator typology for a marine hydrokinetic application. The proposed magnetically geared generator is composed of two series connected magnetic gearbox stages with the second stage having an integrated stator. This paper focuses only on presenting the electromagnetic design for the first stage magnetic gearbox with a 5kW (at 40RPM) rating. A volumetric and mass torque density tradeoff analysis is utilized in order to arrive at a high torque density design. The designed magnetic gearbox uses a unique laminated flux concentration inner rotor and Halbach array outer rotor typology with a 6.67:1 gear ratio. A mechanical deflection analysis is performed to verify that the proposed magnetic gearbox is mechanically robust.
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H. Baninajar, J. Z. Bird, S. Modaresahmadi and W. Williams, "Electromagnetic and Mechanical Design of a Hermetically Sealed Magnetic Gear for a Marine Hydrokinetic Generator," 2018 IEEE Energy Conversion Congress and Exposition (ECCE), Portland, OR, 2018, pp. 4987-4993, doi: 10.1109/ECCE.2018.8557386.