Kabushiki Kaisha Yaskawa Denki

Masahiko Tanabe

Yasuhiro Miyamoto

Kazuya Watanabe

Motomichi Ohto

Shusaku Yoshida

Toshiyuki Yamagishi

Toshiyuki Hoshi

Masaki Hisatsune

Takahisa Yamada

Takato Doi

Kazuhiro Maekawa

Toru Takano

Seigo Nagamatu

Hirofumi Inokuchi

In a coolant-cooled linear motor includes an armature including armature windings and a cooling jacket arranged to surround the armature windings, the cooling jacket unit includes four cooling jackets defining four side faces parallel to the extension direction of the armature and two end blocks defining two opposite end faces in the extension direction of the armature, the cooling jackets and the end blocks being connected to one another in a box shape. Each of the cooling jackets has an internal space to be supplied with a coolant; and a field magnet unit includes a yoke made of a ferromagnetic material and permanent magnets arranged in the yoke, one of the armature and the field magnet unit making relative movement with respect to the other.

Coolant-cooled linear motor

A cylindrical linear motor capable of solving the problem that a leak flux links an aluminum frame at both ends of an armature of a conventional cylindrical linear motor, which causes a viscous braking force as a motor brake force, is provided. The cylindrical linear motor armatureincludes a plurality of cylindrical coilsarranged in the axial direction in a cylindrical yokeformed by a magnetic material and framesandcovering the outside of the cylindrical yoke. Only in the axial direction region of the framewhere the cylindrical yokeexists, the frameis formed by an aluminum frame, and the axial direction both end portions are formed by a resin cap

Cylindrical linear motor armature, cylindrical linear motor field pole, and cylindrical linear motor using them

A gap winding motor includes a stator and a rotor. The stator includes a stator core and air-core coils for generating a rotating magnetic field which are attached to an inner peripheral surface of the stator core. The rotor is disposed so as to face the stator with an air gap therebetween. A stator core is divided into two core portions in an axial direction of the motor, and a spacer is disposed between the core portions. A unique air-gap section is provided between the core portions, and coil terminal processes are performed in the air-gap section between the core portions.

Gap winding motor

A permanent magnet synchronous linear motor comprising a field yoke ( ) having a plurality of permanent magnets ( ) the polarity of which is alternated and which are arranged linearly and an armature ( ) facing the array of the permanent magnets ( ) through a magnetic air gap, wherein the armature ( ) comprises an armature core ( ) having main teeth ( ) and slots ( ), an armature winding ( ) wound in the slots of the armature core ( ), and auxiliary teeth ( ) provided at both the ends of the armature core ( ). The distance &tgr; between the centers of the auxiliary teeth ( ) and the pitch &tgr; of the field poles satisfy a relation &tgr; &equals;(2 &minus;1)&times;&tgr; /2 (n is a positive integer) and the length O of the auxiliary teeth ( ) is in a relation of O<Hd<Ht where Hd is the length of the auxiliary teeth ( ) in the direction orthogonal to the array of permanent magnets and Ht is the length of the main teeth ( ) in the direction orthogonal to the array of permanent magnets. Thus a high performance permanent magnet synchronous linear motor having reduced cogging thrust can be provided.

Permanent magnet synchronous linear motor

The invention relates to a linear motor which is provided with a row of permanent magnets . . . for a field system, and an armature facing the same via a magnetized space in an orthogonal direction thereto, wherein the armature core has a winding accommodation groove formed at both sides of armature iron plates produced by punching out oriented electromagnetic steel plate so as to become rectangular, and convex and concave engagement portions and the armature iron plates are laminated to constitute one core block, and at the same time, the lengthwise direction, orthogonal to the permanent magnet row, in the respective core blocks is made the same as the rolling direction of electromagnetic steel plates. Thereby, since the magnetic flux of the armature winding flows along the rolling direction of the core blocks, the magnetic flux density can be increased, and the peak thrust can be also increased.

Linear motor

Growing community of inventors

Kitakyushu, Japan

Masahiko Tanabe