Kabushiki Kaisha Yaskawa Denki

Takao Fujii

Shusaku Yoshida

Yuji Nitta

Yoshiaki Kubota

Masafumi Tamai

Akio Sakai

Ryuichirou Tominaga

Fumihiro Tara

In a linear motor, a can has a two-layer structure including an inner canand an outer can, and an inner passageformed between an armature windingand the inner canand an outer passageformed between the inner canand the outer canare constituted by each can. Communicating portionsA andA for causing the inner passageand the outer passageto communicate with each other are provided in the vicinity of a refrigerant supply portin each of the cansandin such a manner that a refrigerant supplied from the refrigerant supply portbranches into the inner passageand the outer passageand thus flows. Consequently, it is possible to obtain a linear motor armature and a linear motor having a high cooling capability which can prevent the deformation of the can by using a conventional inactive refrigerant to improve the passage for the refrigerant.

Linear motor armature and linear motor

A small and high rigid linear motor (), wherein a tabular heat pipe () is disposed between a plurality of coil rows forming an armature coil () along the longitudinal direction of an armature () with a part of the heat absorbing part of the heat pipe () fixed to the armature coil () and the heat radiating part thereof inserted into a refrigerant passage (), a block-shaped locking member () for fixing the heat pipe () to a frame () is installed between the portion of the heat pipe () for fixing the armature coil thereto and the portion thereof inserted into the refrigerant passage (), and a hollow recessed part () forming the refrigerant passage () and allowing die insertion of the heat radiating part of the heat pipe () therein and a locking step part () allowing the locking of the frame () to the locking member () installed on the heat pipe are provided in the frame (), whereby the heat of the armature coil can be efficiently transferred to the frame, and the thrust of a rotor can be prevented from lowering according to a rise of temperature of the armature coil.

Linear motor

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Fukuoka, Japan

Takao Fujii