Kabushiki Kaisha Yaskawa Denki

Nobuyuki Irie

Toru Shikayama

Yasuhiro Miyamoto

Shusaku Yoshida

JianPing Yu

An object of the invention is to provide a coreless linear motor which can suppress the increase in the temperature of an armature winding. There is provided a coreless linear motor in which a slider () is made up of an armature winding () which comprises a plurality of coils () and a slider mounting table () which supports the armature winding (), and a stator () is made up of permanent magnets () which form a plurality of magnetic poles and back yokes, and, furthermore, in which both left and right sides of the armature winding () is sandwiched by the permanent magnets () via a gap, the coreless linear motor being characterized in that a concave portion (a) is provided in a lower side of the slider mounting table (), and in that a coil upper side () which corresponds to an upper side of the coil () is inserted in the interior of the concave portion (a) in the slider mounting table () and a space is provided in the vicinity of a coil lower side () which corresponds to a lower side of the coil () for performing a connecting process between the coils () or the coil () and a lead wire ().

Coreless linear motor

A linear motor excellent in insulation between armature coils, easy to assemble, very small in thrust ripple, comprising a secondary side supporter attached with a secondary side consisting of a plurality of magnetic field poles, and an armature element supporter facing the secondary side via a clearance and provided with an armature element ( ) having a plurality of concentrate-wound armature coils ( ), the secondary side and the armature element ( ) being disposed facing each other and in parallel in the advancing direction, wherein field poles in the secondary side are disposed in the advancing direction of a mover with adjacent poles being unlike every Pm pitches, and a plurality of armature coils ( ) are disposed in an array in the advancing direction of the mover every Pc pitches, the coil pitch Pc&equals;5/3&times;Pm.

Linear motor

A canned linear motor such that increase of the temperature of the mover is suppressed, the viscous damping force is reduced, and the strength of the can does not deteriorate. A canned linear motor comprises two parts, in one of which a permanent magnet is provided as a field system and in the other of which a three-phase armature winding, a winding fixing frame for supporting the armature winding, a coolant passage through which a coolant for cooling the surface of the armature winding passes, a can ( ) covering the armature winding and the coolant passage, and a header ( &prime;) for sealing the can. Slits ( ) extending in the direction of travel and parallel to each other are formed in the can ( ).

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Fukuoka, Japan

Nobuyuki Irie