Kabushiki Kaisha Yaskawa Denki

Yuji Nitta

Junji Hirai

Yoshiji Hiraga

Kenji Hirose

Hiroyuki Hamamoto

Kenji Nomura

Shusaku Yoshida

Akio Sakai

Takao Fujii

Katsuhiko Shiraishi

Kazuyuki Shiono

Toshihiro Ishibashi

A linear motor armature according to an embodiment includes an armature coil and a cooling jacket. The cooling jacket is provided to surround the armature coil and has an internal space into which a refrigerant is supplied. The cooling jacket is formed in a thin plate shape having a structure in which a channel for supplying the refrigerant is provided in a multiple manner in its thickness direction.

Linear motor armature and linear motor

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.

A noncontacting power transfer apparatus, a noncontacting signal transfer apparatus, to be referred to below as a power coupler and a signal coupler, respectively, and a separate machine apparatus that uses these couplers are disclosed. The power coupler is composed of a primary side and a secondary side that are fixed to a static unit and rotatable unit of the machine apparatus, respectively, such that its output does not vary with arbitrary rotation by the rotatable unit. The signal coupler is composed of receiving side portion having a electric-to-light conversion device that converts an electric signal to an optical signal of rotational symmetry relative to the axis of rotation of the rotatable unit and a photoelectric conversion device that converts an optical signal to an electric signal. Accordingly, the rotatable unit can be supplied with power from the static unit even while rotating, and moreover, can communicate with the static unit. Further, the rotatable unit can be easily attached to the static unit and can remove from the static unit.

Noncontacting electric power transfer apparatus, noncontacting signal

A noncontacting power transfer apparatus, a noncontacting signal transfer apparatus and a separate machine apparatus that uses these couplers are disclosed. The power coupler is composed of a primary side and a secondary side that are fixed to a static unit and rotatable unit of the machine apparatus, respectively, such that its output does not vary with arbitrary rotation by the rotatable unit. The signal coupler is composed of receiving side portion having a electric-to-light conversion device that converts an electric signal to an optical signal of rotational symmetry relative to the axis of rotation of the rotatable unit and a photoelectric conversion device that converts an optical signal to an electric signal. Accordingly, the rotatable unit can be supplied with power from the static unit even while rotating, and moreover, can communicate with the static unit. Further, the rotatable unit can be easily attached to the static unit and can be removed from the static unit.

A noncontacting power transfer apparatus, a noncontacting signal transfer apparatus(to be referred to below as a power coupler and a signal coupler, respectively), and a separate machine apparatus that uses these couplers are disclosed. The power coupler is composed of a primary side and a secondary side that are fixed to a static unit and rotatable unit of the machine apparatus, respectively, such that its output does not vary with arbitrary rotation by the rotatable unit. The signal coupler is composed of receiving side portion having a electric-to-light conversion device that converts an electric signal to an optical signal of rotational symmetry relative to the axis of rotation of the rotatable unit and a photoelectric conversion device that converts an optical signal to an electric signal. Accordingly, the rotatable unit can be supplied with power from the static unit even while rotating, and moreover, can communicate with the static unit. Further, the rotatable unit can be easily attached to the static unit and can remove from the static unit.

Growing community of inventors

Iruma, Japan

Yuji Nitta