Two dimensional model of a permanent magnet spur gear

Frank Thorleif Jørgensen, Torben Ole Andersen, Peter Omand Rasmussen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearch

Abstract

This paper presents calculation and measurement results of a high-performance permanent-magnetic gear. The analyzed permanent-magnetic gear has a gear ratio of 5.5 and is able to deliver 27 N/spl middot/m. The analysis has shown that special attention needs to be paid to the system where the gear is to be installed because of a low natural torsion spring constant. The analyzed gear was also constructed in practice in order to validate the analysis and predict the efficiency. The measured torque from the magnetic gear was only 16 N/spl middot/m reduced by the large end-effects. A systematic analysis of the loss components in the magnetic gear is also performed in order to figure out why the efficiency for the actual construction was only 81%. A large magnetic loss component originated in the bearings, where an unplanned extra bearing was necessary due to mechanical problems. Without the losses of magnetic origin in the bearings and less end-effects caused by relatively short stack, an impressive efficiency estimated at 96% can be obtained. Comparison with classical mechanical gears has shown that the magnetic gear has a better efficiency and a comparable torque per volume density. Finally, it is concluded that the results in this paper may help to initiate a shift from mechanical gears to magnetic gears.
Original languageEnglish
Title of host publicationConference Record of the 2005 Industry Applications Conference, 2005. Fourtieth IAS Annual Meeting, Vol. 1
Number of pages4
PublisherElectrical Engineering/Electronics, Computer, Communications and Information Technology Association
Publication date2005
Pages261 - 265
Publication statusPublished - 2005
EventIndustry Applications Conference, 2005. Fourtieth IAS Annual Meeting - Hong Kong, China
Duration: 2 Oct 20056 Oct 2005
Conference number: 1

Conference

ConferenceIndustry Applications Conference, 2005. Fourtieth IAS Annual Meeting
Number1
Country/TerritoryChina
CityHong Kong
Period02/10/200506/10/2005

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