Patent ID: 6329728
Filing Date: 2001-12-11
Classification: H02K

Abstract:
A cylinder-type linear synchronous motor comprising:a movable element including a direct-acting shaft arranged so as to be reciprocated in an axial direction thereof, a magnet mount fixed on said direct-acting shaft and at least one permanent magnet train constituted by a plurality of permanent magnets fixed on said magnet mount and arranged in said axial direction; anda stator including at least one stator core unit and a plurality of annular windings arranged so as to be spaced from each other at predetermined intervals in said axial direction and in a manner to surround said movable element;said stator core unit including a plurality of magnetic pole sections arranged so as to be opposite to said permanent magnet train of said movable element with a predetermined interval being defined therebetween and a yoke for magnetically connecting said magnetic pole sections to each other;said magnetic pole sections being spaced from each other at intervals in said axial direction so that a slot in which each of said annular windings is fitted at a part thereof is defined between each adjacent two of said magnetic pole sections; said stator core unit being constituted by combining a plurality of stator core divisions with each other in said axial direction;said stator core divisions provided with combination structures so as to be positioned at portions of said yoke corresponding to said slots of said stator core unit; said combination structures being constructed so as to be combined with each other in said axial direction.