Sub-Scale Stage 1 Magnetic Gear for a Marine Hydrokinetic Generator


The goal of this project is to design, fabricate, and test a hermetically sealed 50 kilowatt (kW) multistage magnetically geared generator (MGG). In
order to reduce risk, a sub-scale 5kW multistage MGG was first built. This project will benefit MHK device developers by providing an MHK PTO that overcomes the reliability concerns of the mechanical gears and the sizing constraints of the direct-drive generators. Measurement data for a 9.5:1 gear ratio magnetic gear with a measured peak torque of 227 N-m as well as the dual stage magnetic gear with a 63:1 gear ratio.

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Additional Info

DOE Project Name: A Hermetically Sealed Magnetically Geared Marine Hydrokinetic Generator
DOE Project Number: EE0008100
DOE Project Lead: Erik Mauer
DOI: 10.15473/1867859
Last Updated: a month ago
Data from May, 2022
Submitted May 12, 2022


Portland State University



Awaiting release License 
All Resources Available Jul 30, 2026


Jonathan Bird
Portland State University


MHK, Marine, Hydrokinetic, energy, power, magnetic gear, MGG, magnetic gear generator, generator, PTO, WEC, CEC, sub scale, subscale, sub-scale, scaled, model, prototype, test, measurment, raw data, data, test data


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