Hitachi, Ltd.

Tomoya Tsunoda

Shigeo Amagi

Mitsuru Onoda

Tatsuo Honda

Keiichi Morikawa

Hideaki Mori

Tadashi Sonobe

Yasuomi Yagi

Saburo Usami

Toshikazu Narahara

Masahiko Sakai

Shinichi Toyoda

Takeshi Hakamada

In order to provide an electric machine winding having an insulating layer excellent in electric characteristics and an insulating layer of an electric machine winding excellent in electric characteristics, a high-thermal-conductivity insulating layer is formed around the peripheral portion of a winding conductor by the use of a high-thermal-conductivity insulating tape having a mica layer , a reinforcing material layer , and a high-thermal-conductivity filler layer , wherein the amount of resin of the mica layer makes up 10 wt % to 25 wt % of the total weight of the insulating material and wherein the amount of resin of the high-thermal-conductivity filler layer makes up 10 wt % to 25 wt % of the total weight of the insulating material.

Insulating material and electric machine winding and method for manufacturing the same

In order to provide windings for electrical rotating machines having an insulating film superior in electrical characteristics, a high heat conductive insulating film is formed at outer periphery of wound conductor using a high heat conductive insulating tape, which includes a mica layer a reinforcement layer and a high heat conductive filler layer wherein the resin content in each layer of the mica layer and the high heat conductive filler layer is specified in the range of 10-25% by weight based on the whole weight of the material. 1-80% by weight of said filler is spherical.

Insulating material, windings using same, and a manufacturing method thereof

An electric rotating machine having a rotor, rotatably disposed in an inner radius side of a stator through a gap, including rotor windings contained in a plurality of slots formed in a rotor core, a slot insulation placed between the rotor winding and the slot, an insulation block placed between a wedge arranged at a peripheral side of the rotor core outward of the rotor winding of the slot and the rotor winding. At least one of the slot insulation and the insulation block is an insulation formed by filling or mixing granular and/or short-fiber insulating materials having a thermal conductivity higher than 5 W/m&middot;K in a resin and a thermal conductivity in a thickness direction higher than 0.35 W/m&middot;K.

Electric rotating machine

In order to provide windings for electrical rotating machines having an insulating film superior in electrical characteristics, a high heat conductive insulating film,is formed at outer periphery of wound conductor,using a high heat conductive insulating tape, which includes a mica layer,, a reinforcement layer,, and a high heat conductive filler layer,, wherein the resin content in each layer of the mica layer,and the high heat conductive filler layer,is specified in the range of 10-25% by weight based on the whole weight of the material. 1-80% by weight of said filler is spherical.

Insulating material windings using same and a manufacturing method thereof

An the electric rotating machine which is compact and of reduced cost by improving the thermal conductivity of the main insulation in the thickness direction while maintaining the insulation breakdown voltage of the main insulation high. The initial breakdown voltage V in the thickness direction of the main insulator 30 of the stator winding 3 is higher than 20 kV/mm, and the thermal conductivity &lgr; in the thickness direction is within a range of 0.35 to 1 W/m&middot;K, and the product V&lgr; of the initial breakdown voltage V and the thermal conductivity &lgr; satisfies a relationship of 7&lE;V&lgr;&lE;20 (MWA/m,&middot;K). The amount of resin is within a range of 20 to 50 weight % of the main insulation material.

Electric rotating machine with reduced thickness and volume of insulation

The high thermoconductive insulating film 11 was formed around the outer periphery of the wound conductors 10, using the high thermoconductive insulating tape 1 comprising the mica layer 3, the reinforcement layer 5, and the high thermoconductive filler layer 7, wherein the resin content in each layer of the mica layer 3 and the high thermoconductive filler layer 7 is specified to the range of 10-25% by weight of the total weight of the material.

Insulating material and windings thereby

Electric windings comprising an electric conductor and a plurality of cured insulating layers wrapping around the conductor, said cured insulating layers being obtained by bonding two or more insulating materials with a binder solution containing a mixture of a condensation polymerization type silicone resin containing hydroxyl groups in the molecule and an addition polymerization type silicone resin to form a composite insulating material, wrapping the composite insulating material around the conductor, impregnating the wrapped composite insulating material with an impregnating varnish of an epoxy-isocyanate resin and curing the impregnated composite insulating material, have excellent water resistance in addition to excellent thermal resistance, and mechanical properties.

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Hitachi, Japan

Tomoya Tsunoda