Linear synchronous motors for high-speed ground transportation

A Review of Integrated Propulsion, Suspension and Guidance Passive Guideway Maglev Technologies

“…In order to improve on this design Levi proposed that a DC excitation on the primary be used to provide the magnetic suspension force and magnetization field, while an AC winding is used to synchronously interact with the salient pole guideway structure to create a propulsive force. This type of integrated maglev motor has been termed Iron Cored Linear Synchronous Motor (ICLSM) [21,22]. A variety of different salient track structures have been proposed for the ICLSM, three such types, the homopolar, heteropolar, zig-zag ICLSM [20,42,45,69] designs are illustrated in Fig.…”

A generalized 3-D dynamic modelling for transverse flux homopolar linear machines based on statistical saliency-effect superposition method

“…By maintaining the superiority of the LSM while only having the power supplies on one side of the machine, the homopolar linear synchronous machine (HLSM) can easily avoid the drawback of the LSM as compared with the LIM. Nevertheless, the operating characteristics of various LSMs, including the HLSM, were thoroughly investigated by Levi in 1973 [E], in which a comparison study on the advantages of the HLSM over the LSM were addressed.…”