| 摘要 |
PURPOSE:To improve driving efficiency by employing a secondary stator comprising a stator body having a large number of core fixing holes in the longitudinal direction with intervals and a core placed in the core fixing holes. CONSTITUTION:Each secondary stator 15 comprises a stator body 17 having a large number of core fixing holes, i.e. slits 17a, made in the longitudinal direction with intervals and a core 18 inserted into the slit 17a. When ac AC current is fed to the winding of a primary mover 2, flux 19 is produced as shown by arrows and an eddy current 20 is induced in the secondary stator 15. The flux 19 and the eddy current 20 interact to produce thrust for driving the primary mover 2. At this time, the eddy current flows concentrically through the stator body 17 having low electric resistance. Since the part, through which useless eddy current making no contribution to the production of thrust flows, is limited correspondingly, random flow of useless eddy current is reduced. |
