7K. Hiram, Thrust calculation of linear pulse motors using a combined technique employing finite element method [ J ]. IEEE Trans. On Magnetic, 1992,28 ( 2 ) : 1394 - 1397.
8T. Yokozuka, E. Beda. Force - displacement charact - eristics of linear stepping motors [J]. IEEE proceedings B, 1992, 139(1) : 37 -43.
9BRUCKL S.Feed-drive system with a permanent magnet linear motor for ultra precision machine tools[C].IEEE 1999 International Conference on Power Electronics and Drive Systems,Hong Kong,1999.
10BRANDENBURG G,BRUCKL S,DORMANN J.Comparative Investigation of Rotary and Linear Motor Feed Drive Systems for High Precision Machine Tools[C].IEEE,AMC2000-NAGOYA,2000.