Impact of Bridged Flux Modulators on Coaxial Magnetic Gear

In a coaxial magnetic gear, the bridged modulating ring, fabricated from continuous laminations with interposing bridges (flux modulators) between steel components, demands reduced manufacturing effort in contrast to the conventional modulating ring comprising discrete steel pieces. It is imperative to assess the influence of bridged flux modulators in the context of magnetic performance, mechanical strength, and manufacturing efficiency. This paper centers its examination on the impact of the geometric aspects of the bridged modulating ring, encompassing parameters such as bridge thickness and the pole-arc/pole-pitch ratio. Additionally, the eddy current losses resulting from excessive or thicker clamping rods are discussed.