| Title |
Effect of Tooth Shape and Unbalanced M.M.F on Static Thrust Force Characteristics of Linear Pulse Motor |
| Authors |
이동주(Lee, Dong-Ju) ; 이은웅(Lee, Eun-Ung) ; 김성헌(Kim, Seong-Heon) ; 김성종(Kim, Seong-Jong) |
| Keywords |
Linear Pulse Motor ; Microstep Control ; Permeance Method ; Finite Element Method ; Static Thrust Force |
| Abstract |
2 phase 8 pole HB-type(flat-type) Linear Pulse Motor can be used as the high precision position actuator because of its many advantages (simple control circuit, high stiffness characteristics, etc). Also, using the microstep drive, its noise and vibration can be reduced considerably and positional resolution may be increased further. But, 20°tapered tooth shape to reduce the normal force have an much effect on the static thrust force characteristics. And, because of hybrid-type LPM, interaction between the permanent magnet and the excitation current have an effect on the various characteristics of LPM. Hence, in this paper, the effect of tooth shape on static thrust force characteristics was analyzed using the air gap permeance by finite element method. For analyzing the effect of unbalance between the m.m.f of permanent magnet and the m.m.f of excitation current, unbalanced m.m.f coefficient sigma were introduced with the permenace matrix and switching matrix. |