Comparison of Axial Magnetic Gears Based on Magnetic Composition Topology Differences

Abstract

This paper proposes a design and implementation of an axial type magnetic gear (MG)based on the composition of the magnetic arrangement. We report a quantitative comparison of twoMG topologies with rectangular magnets arranged in series and parallel. Increased magnetic fluxis done through magnetic circuit analysis and electrical circuit approach. Testing is done by usingthe rotation of a DC motor drive from 300–2600 rpm with a DC generator under load conditions.Measurement of load current and generator output power for both axial MG topologies are taken andanalyzed. The results showed that the performance of an axial MG with the rectangular magneticarrangement in parallel is better than that of a series arrangement. Based on the measured loadingcurrent of the two axial MG topologies, at generator rotation between 300–1300 rpm with 100, 200,and 300 W resistance loads show the same load current. Conversely, after a DC generator rotationapproaches 12of the maximum rotation (1300–2600 rpm) there is a significant increase in load currentfluctuations. That is, with an increase of load currents occurring, the parallel magnetic topologyshows an increase in load torque due to an increase of magnetic flux in the gear train magnets ofthe MG.