Linear Electric Machines, Drives, and MAGLEVs Handbook

11 Linear Switched Reluctance Motors (L-SRM)

Modeling, Design, and Control

Linear switched reluctance motors (L-SRMs) are counterparts of rotary switched reluctance motors [1–3]. The finite length of their magnetic circuit along the direction of motion introduces, for a small number of poles, some longitudinal static effects (asymmetries between phases). Also, the normal force has its peculiarities with L-RSM, but other than that, the theory developed for rotary SRMs may be adapted easily for linear SRMs.

So, as for rotary SRMs, L-SRM produces a thrust and motion by the tendency of a ferromagnetic secondary to hold a position where inductance of the active (excited) primary phase is maximum. Though it is in general a multiphase machine, L-SRM ...