Comparative study of E-core and C-core modular PM linear machines with different slot/pole combinations

Permanent magnet linear synchronous machines (PMLSMs) have attracted increasing interest due to their special merits, such as direct linear motion, fast dynamic response, simple system structure and so on. In order to simplify the manufacture and improve the fault-tolerant ability, two modular PMLSMs with C-core and E-core armature structures are presented and compared in this paper. The rotating modular PM machines with flux gaps are investigated [1], and it is shown that the performance can be improved if slot number is lower than the pole number. However, to modular PMLMs, the odd poles, i.e, 12s/13p, should be investigated, and the influence on detent force also should be analyzed.