Toshiba Mitsubishi-electric Industrial Systems Corporation

Kanazawa Institute of Technology

Tmeic Corporation

Toshihiro Tsuda

Tetsuo Yoshimitsu

Kotaro Mura

Mitsuhiro Kawamura

Tadashi Fukami

Kazuo Shima

Yuichi Tsuboi

Shinsuke Kikuta

Yoshihiro Ishikawa

Kodai Ushiwata

Hirotake Nakaji

Teruo Kanekawa

Kazuki Noda

Masahiro Takeno

A producing method is for an electrical insulating structure to cover an outer surface of a to-be-insulated object. The method comprises: a tape production step of producing a main insulation tape by using a nanoparticle-containing joining macromolecular polymer; a taping step of winding a main insulation tape on outside of the to-be-insulated object to form a main insulated part; a vacuum drawing step, which is performed after the taping step, of vacuum drawing the tape-wound to-be-insulated object; and an impregnation step, which is performed after the vacuum drawing step, of injecting a impregnating macromolecular polymer to impregnate the main insulated part therewith.

Electrical insulating structure producing method, electrical insulating structure and rotating electrical machine

A producing method is for an electrical insulating structure covering an outer surface of a to-be-insulated object. The electrical insulating structure producing method comprises: a sheet production step of producing a main insulating sheet in which nanoparticles have been mixed; a cutting step in which the main insulating sheet is cut into main insulation tapes; a taping step of winding each of main insulation tapes on outside of the to-be-insulated object to produce a tape-wound to-be-insulated object in which a main insulated part is formed; a vacuum drawing step of vacuum drawing the tape-wound to-be-insulated object; an impregnation step of injecting a impregnating macromolecular polymer to impregnate the main insulated part in the tape-wound to-be-insulated object, and a solidifying step of raising the temperature of the insulated part to solidify the macromolecular polymer containing the nanoparticles.

This electrical tree test method is a method for testing for electrical trees in an insulating member including a mica insulation applied to an electrical conductor. The method comprises: an assembly setting step of setting an electrode setting assembly to the outside of the mica insulation; an impregnation step of impregnating the mica insulation with synthetic resin after the assembly setting step; a removal step of removing components of the electrode setting assembly, except an electrode structure, after the impregnation step; a power supply connecting step of connecting, after the removal step, the electrical conductor and the electrode structure to a power supply in order to apply a voltage between the electrical conductor and the electrode structure; and a voltage applying step of applying a voltage between the electrical conductor and the electrode structure, after the power supply connecting step.

Electrical tree test method, electrode structure, and electrode setting assembly

A producing method for an electrical insulating structure that covers an outer surface of a to-be-insulated object is provided. The method comprises: a taping step of winding a main insulation tape on outside of the to-be-insulated object; a spraying step of spraying nanoparticles onto the outer surface of the wound main insulation tape; a vacuum drawing step of vacuum drawing the tape-wound to-be-insulated object; and an impregnation step of injecting a nanoparticle-containing impregnating macromolecular polymer in which nanoparticles have been kneaded to impregnate the to-be-insulated object therewith. In the spraying step, microcapsules, which contain the nanoparticles and are able to release the nanoparticles before the impregnation step, are sprayed.

Producing method for electrical insulating structure, electrical insulating structure and rotating electrical machine

A water-tree resistance evaluation material including: a material selection selecting a candidate insulation material; a test carrying out a water tree test on a test piece having electrode holes formed on a first surface; and a candidate insulation material evaluation evaluating characteristics of the candidate insulation material, including progress and speed of a water tree. The test includes: a system and condition setting for setting a test system; a voltage application for grounding a ground-side electrode that is immersed in the ground-side aqueous solution, while applying an AC voltage to an application-side electrode that is immersed in the application-side aqueous solution; a measurement step; and a period determination for determining whether a test period has exceeded a predetermined period.

Water-tree resistance evaluation method, insulation design method, and rotary electric machine

A water tree testing apparatus using a flat test piece comprising a candidate insulation material an d having a first surface having a plurality of electrode holes formed therein has: a liquid-permeable conductive first permeable member that is attached to the first surface and covers the electrode holes; a liquid-permeable conductive second permeable member that is attached to a second surface that is opposite side from the first surface, and extends along the second surface as to face the first permeable member with the test piece therebetween; a first water tank for immersing the first surface in the first aqueous solution; a second water tank for immersing the second surface in the second aqueous solution; a first electrode, and a second electrode.

Water tree testing method and water tree testing apparatus

This rotating electric machine has a rotor, stator core, field windings for multiple poles, and armature windings for the multiple poles. The rotor is rotatably supported about a shaft. Convex-shaped multiple salient pole sections are formed on the outer circumference of the rotor while arranged in the circumferential direction. The stator core is provided along the outer circumference of the rotor with an air gap from the rotor. Convex-shaped multiple teeth are formed on the inner circumference of the stator core while arranged in the circumferential direction. The field windings for the multiple poles are wound around each of the multiple teeth while insulated from the field windings.

Rotating electric machine

This rotating electrical machine has a rotor, stator core, field windings for multiple poles, and armature windings for the multiple poles. The rotor is rotatably supported about a shaft. Convex-shaped multiple salient pole sections are formed on the outer circumference of the rotor while arranged in the circumferential direction. The stator core is provided along the outer circumference of the rotor with an air gap from the rotor. Convex-shaped multiple teeth are formed on the inner circumference of the stator core while arranged in the circumferential direction. The field windings for the multiple poles are wound around each of the multiple teeth while insulated from the field windings.

Rotating electrical machine

A field control device for a synchronous rotating machine includes: a target operating condition input unit; a first subtraction unit; a final-control-quantity control computation unit that accepts the final-control-quantity deviation and outputs a field-current correction demand value; an anticipatory computation unit that outputs a field-current anticipatory demand value based on the operating condition demand values input; an addition unit that adds the field-current correction demand value and the field-current anticipatory demand value; a second subtraction unit; and a field-current regulation device that adjusts the field current based on the field current deviation. The anticipatory computation unit includes: a dependence characteristic data storage unit that stores dependence characteristics predicted on the basis of the results of a no-load test; and a circuit calculation unit that performs a circuit calculation by using the dependence characteristics and outputs a field-current anticipatory demand value.

Growing community of inventors

Tokyo, Japan

Toshihiro Tsuda