Affiliations: [a] State Key Laboratory of Digital Manufacturing
Equipment and Technology, Huazhong University of Science and Technology, Wuhan,
Hubei, China
Correspondence:
[*]
Corresponding author: Jia-Jun Yang, State Key Laboratory of
Digital Manufacturing Equipment and Technology, Huazhong University of Science
and Technology, Wuhan 430074, Hubei, China. Tel.: +86 27 87543971 81; Fax: +86
27 87543971 81; E-mail: yjjllar@163.com
Abstract: The severe drawback of slotted permanent magnet linear synchronous
motor (PMLSM) is the detent force, particularly when accurate positioning and
constant low speed is required for numerically controlled machine tool. In this
paper, a novel short-armature slotted type multi-segment permanent magnet
linear synchronous motor (MSPMLSM) is proposed and constructed to reduce the
detent force. It consists of a proper shift of the multiple segments of iron
core relative to the PMs. The detent forces of MSPMLSMs with different number
of segment are analyzed and simulated by finite element method (FEM). The
proposed structure has been proved to be a very effective approach for the
reduction of detent force. Then this paper presents the statistical and
mathematical optimum design of a 3-segment PMLSM using response surface
methodology (RSM) together with FEM to minimize the detent force. Full
factorial design and steepest ascent method, one of the iterative search
method, is proposed to establish optimal design area for applying RSM. Finally,
the global optimal design is predicted and the optimally designed one is
manufactured, and the numerical results and measured results are reported to
validate the effectiveness of this proposed method.
