IEEE Transactions on Industry Applications
Magnetic gears -- Design and construction, Magnetic flux, Harmonic analysis, Rotors -- Structure
This paper presents the electromagnetic and mechanical design as well as experimental testing results for a 9.5:1 gear ratio, series connected, coaxial magnetic gear (MG) for use in a marine hydrokinetic generator. A 2-D and 3-D magnetostatic finite element analysis (FEA) sizing analysis was also conducted and a torque density comparison between using a nested or series MG typology is presented. To achieve a high torque density a four-segment per pole-pair Halbach rotor assembly with a unique slotted Halbach magnet arrangement was used that enables the Halbach rotor magnets to be more easily assembled, even with dimensional tolerance inaccuracies. A deflection and thermal FEA analysis along with experimental validation test results are presented. The experimentally measured torque and torque density for the MG design are 188.4 N·m and 236.5 N·m/L respectively.
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Baninajar, H., Modaresahmadi, S., Wong, H. Y., Bird, J. Z., Williams, W., & Dechant, B. (2022). Designing a Halbach Rotor Magnetic Gear for a Marine Hydrokinetic Generator. IEEE Transactions on Industry Applications.