908results about "Windings insulation material" patented technology

A flexible insulating tape (16) contains a flexible backing (18) and a mica or mica-like silicate matrix (20) with insulating resin (17) and intercalated metal ions (12) between the matrix (2) where the resin (17) and the ions (12) are intimately disposed next to the mica (20).

The present invention provides for a method of impregnating a matrix with a high thermal conductivity filled resin 32, which produces a resin impregnated matrix. The high thermal conductivity material 30 comprises 5-60% by volume of the resin 32. This is compressed by approximately 5-30%, and the distances between the high thermal conductivity materials loaded in the resin are reduced, and the resin is then cured.

A stator includes an annular stator core and a stator coil. The stator coil is formed of a plurality of electric wires mounted on the stator core. The stator coil has a coil end part that protrudes from an axial end face of the stator core so as to be located outside slots of the stator core. The electric wires forming the stator coil are grouped into a plurality of electric wire sets. Each of the electric wire sets consists of a predetermined number of the electric wires which are electrically connected to one another. The stator coil further includes a plurality of bridging wires. Each of the bridging wires extends, on an axially outer periphery of the coil end part of the stator coil, to electrically connect a corresponding pair of the electric wire sets. Further, at least two of the bridging wires are fixed to one another.

In one embodiment the present invention improves the heat flow from an electrically insulated object 13 by providing an enhanced conduit at the interface between the layers of insulating tape 16. The tape 16 has been surface coated with a high thermal conductivity (HTC) material, so that the interface between the layers of tape 23 provides a pathway for the heat to reach the environment 24. The radiation of heat through the tape layers is also increased by the surface coatings.

The invention aims to provide a highly heat conductive tape member or sheet member and a method for easily producing a highly heat conductive tape member or sheet member. The mica tape member or mica sheet member of the invention includes a mica-containing layer and a lining material, and the mica-containing layer contains scaly particles, particles having a heat conductivity of 0.5 W / mK or higher and a size of 1 μm or smaller, and a binder.

On a surface of a glass cloth adhered a mica layer sheet, a mixture of inorganic particles having a thermal conductivity of at least 5 W / mK, a resin, and a solvent is applied to form a layer of the mixture of the inorganic particles, the resin, and the solvent; the layer of the mixture is reduced in thickness using a doctor blade, followed by pressurizing to form a high thermally conducting layer; the mica layer sheet on which the high thermally conducting layer is disposed is cut to obtain a mica insulating tape; and the mica insulation tape is wound around a coil conductor. As a result, an insulated coil that is excellent in the voltage endurance characteristics and has a high thermal conductivity is manufactured.

On a surface of a glass cloth adhered a mica layer sheet, a mixture of inorganic particles having a thermal conductivity of at least 5 W / mK, a resin, and a solvent is applied to form a layer of the mixture of the inorganic particles, the resin, and the solvent; the layer of the mixture is reduced in thickness using a doctor blade, followed by pressurizing to form a high thermally conducting layer; the mica layer sheet on which the high thermally conducting layer is disposed is cut to obtain a mica insulating tape; and the mica insulation tape is wound around a coil conductor. As a result, an insulated coil that is excellent in the voltage endurance characteristics and has a high thermal conductivity is manufactured.

A stator coil includes a plurality of copper strands and a layer of high thermal conductivity polymer disposed adjacent at least one of the copper strands. The high thermal conductivity polymer includes a host polymer and a high thermal conductivity filler. The high thermal conductivity polymer improves heat transfer from the plurality copper strands.

Provided is a stator for use in a brushless direct-current (BLDC) that is used for a direct drive (DD) apparatus for drum-washing machines that is mounted in an allowable space without reducing size of a tub related to a laundry capacity in a drum-washing machine, to thereby make a basket in the inside of the tub rotationally driven in a direct drive method. The slim type stator includes: a number of division cores; a number of bobbins that partially surrounds the number of the division cores; an electric power terminal block on the outer portion of which a connector is provided in which external electric power is applied through the connector and that has terminal pins that are extended to the inside of the stator from the connector; a wiring box that is integrally formed with each bobbin and that mutually connects a stator coil with the terminal pins per phase; and a stator holder that mutually connects a number of division stator cores around which coils are wound with the outer circumference of the bobbins and supports the number of division stator cores.

The invention aims to provide a highly heat conductive tape member or sheet member and a method for easily producing a highly heat conductive tape member or sheet member. The mica tape member or mica sheet member of the invention includes a mica-containing layer and a lining material, and the mica-containing layer contains scaly particles, particles having a heat conductivity of 0.5 W / mK or higher and a size of 1 μm or smaller, and a binder.

An alternator includes a rotor for forming north-seeking (N) and south-seeking (S) poles about a rotational circumference, a stator having a stator core disposed facing the rotor and a polyphase stator winding installed in the stator core, and a bracket supporting the rotor and the stator, wherein the stator core comprises a laminated iron core formed with a number of slots extending axially at a predetermined pitch in a circumferential direction, the polyphase stator winding comprises a number of winding sub-portions in each which a long strand of wire is wound so as to alternately occupy an inner layer and an outer layer in a slot depth direction within the slots at intervals of a predetermined number of slots, the strand of wire folding back outside the slots at axial end surfaces of the stator core to form turn portions, the turn portions align in a circumferential direction to constitute coil end groups at both axial end portions of the stator core, and the turn portions at both axial end portions of the stator core are provided with an insulative coating.

A stator includes a stator core having slots, a stator coil comprised of three phase windings, phase busbars each electrically connecting a corresponding one of the phase windings to an inverter, and a neutral busbar star-connecting the phase windings to define a neutral point therebetween. In each of the slots of the stator core, there are arranged K in-slot portions of the phase windings of the stator coil in K layers so as to be radially aligned with each other, where K is an even number. The phase and neutral busbars are electrically connected with those in-slot portions of the phase windings of the stator coil which are arranged at the radially outermost layer or the radially innermost layer in the respective slots of the stator core so as to be circumferentially spaced from one another by M slot-pitches or more, where M is a slot multiplier number.

An inverter surge-resistant insulated wire, having at least one baked enamel layer around the outer periphery of a conductor, and an extrusion-coated resin layer at the outside of the baked enamel layer, wherein a total thickness of the baked enamel layer and the extrusion-coated resin layer is 50 μm or more, a thickness of the baked enamel layer is 60 μm or less, and a thickness of the extrusion-coated resin layer is 200 μm or less, wherein the minimum of tensile elastic modulus of the extrusion-coated resin layer at a range of 25 to 250° C. is 100 MPa or more, wherein a dielectric constant of an insulation layer having a combination of the baked enamel layer and the extrusion-coated resin layer is 3.5 or less at 25° C. and 5.0 or less at 250° C., and wherein a relation between dielectric constant (∈1′) of the baked enamel layer at 250° C. and dielectric constant (∈2′) of the extrusion-coated resin layer at 250° C. satisfies (∈2′ / ∈1′)>1.

When a rotating electrical machine winding is inserted into a slot with a protective insulation intervening between them, a semiconductive insulating layer is lap-wound between an interlayer insulating layer of the rotating electrical machine winding and the protective insulation, the semiconductive insulating layer being formed by center-folding a continuous semiconductive sheet in the longitudinal direction. A thermal stress relaxation layer is provided inside the center-folded continuous semiconductive sheet so that thermal stress exerted in thickness direction of the insulating layers is absorbed.

A means for treating the end faces of a core which is used for an electrical apparatuses and etc., to give insulation extremely superior in effect of improvement of the insulation, corrosion resistance, adhesiveness, heat resistance, and magnetic properties at a low temperature in a short time without cleaning for removing punching oil, annealing, or other pre-treatment; a core having an insulation coating comprised of a dry film of a pure silicone polymer, modified silicone polymer, and / or mixed silicone polymer as a silicone compound on the core end faces and having an average film thickness of at least 0.5 mum, a breakdown voltage of at least 30V, and a heat resistance in the air of at least 400° C.; and a method of production comprised of forming a core, then dipping it in or spraying it by one or more types of a pure silicone polymer, modified silicone polymer, and / or mixed silicone polymer as an insulation coating.

A magnet wire including at least one conductor and at least one insulating layer. The insulating layer includes (a) at least a polymeric resin; (b) at least a fluorinated organic filler; and (c) at least a non-ionic fluorinated surfactant. The magnet wire is endowed with high resistance to pulsed voltage surges.

This motor has a stator formed by integrally molding a stator core, a stator winding wound around the stator core and a grounding terminal mounted on the stator winding by insulating resin. The motor has a rotor provided with a shaft, a bracket mounting a bearing for supporting the shaft, and a conductive pin press fit in at least one hole having a predetermined diameter provided in teeth of the stator core. The pin and the grounding terminal are electrically connected to each other.

An article comprises a bobbin wire; an electrically insulating backing disposed upon the bobbin wire; a mica paper disposed upon the electrically insulating backing and wound around the backing; and a silicone coating disposed upon the electrically insulating backing. A method of manufacturing an article comprises disposing an electrically insulating backing upon a bobbin wire; disposing mica paper upon the electrically insulating backing; and coating the mica paper with a silicone coating.

Magnet wires wound in slots in a lamination stack of a dynamoelectric machine are encapsulated, in whole or in part, with thermally conductive plastic. Pre-formed features having a thermal conductivity higher than the thermally conductive plastic are insert molded when the plastic is molded. The pre-formed features may include a finned end cap and a fan. Alternatively, end domes of the plastic over end coils of the wound magnet wires have a metallic layer on them, such as by being metallized. The end domes can be formed with features which are also metallized. The thermally conductive plastic can have a phase change additive in it. The magnet wires can have a layer of heat activated adhesive that is activated when the plastic is molded. Slots in the lamination stack can include slot liners formed of thermally conductive plastic. A fan can be formed when the thermally conductive plastic is molded to encapsulate the magnet wires.

Disclosed herein is an article comprising an electrical component and an electrically insulating layer disposed upon the electrical component, wherein the electrically insulating layer comprises a thermosetting polymer and a nanosized filler, wherein the nanosized filler comprises metal oxide and diamond nanoparticles that have an average largest dimension of less than or equal to about 200 nanometers.

A winding configuration for an electric machine includes a stator core with a plurality of winding slots, a plurality of conductor strands distributed in a winding slot of the plurality of winding slots, and an insulation matrix that surrounds each of the plurality of the conductor strands. The winding slot includes a slot cavity with a cross-section area and the plurality of distributed conductor strands are configured to maximize slot fill factor.

An electric motor having an armature which includes a coating of thermally conductive plastic applied in a conventional injection molding process. The armature also includes a fan which is integrally formed from the thermally conductive plastic applied to the armature. This completely eliminates the need to apply one or more coatings of a trickle resin to the armature. It also eliminates the need to separately form and secure a fan by a suitable adhesive to the armature, which together significantly simplifies the manufacturing and cost of the armature. The plastic coating also better fills the spaces between the magnet wires, thus promoting even more efficient cooling and better holding of the magnet wires stationary relative to one another. The thermally conductive plastic coating may be mixed with other suitable materials to provide a density approximately equal to the magnet wires. This eliminates the need to balance the armature after the injection molding step.

The invention adopts a dry mica tape whole impregnation type VPI (vacuum pressure impregnation) insulation process for stator. It comprises: binding up with dry mica tape; after cog leaves the production line, the whole rotator is impregnated with solventliss epoxy in vacuum pressure condition to form a composite insulation structure of VPI process. It features: the epoxy of the insulation structure contains unsaturated bond, and after adding reactive diluent, the whole impregnation insulation epoxy with low viscosity, hypertonicity and wide adaptation is obtained.

Magnet wires wound in slots in a lamination stack of a dynamoelectric machine are encapsulated, in whole or in part, with plastic. The plastic may be thermally conductive and have features molded therein that enhance heat transfer. The plastic may stiffen the armature and increase its critical speed. Characteristics of the plastic, its geometry and its distribution may be varied to adjust spinning inertia and resonant frequency of the armature. The magnet wires may be compressed into the slots, by application of iso-static pressure or by the pressure of the plastic being molded around them. Larger magnet wire can then be used which increases the power of the electric motor using the armature having the larger magnet wire. A two or three plate mold may be used to mold the plastic around the armature. Balancing features can be molded in place. The plastic can have a base polymer that is a blend of two or more polymers and various thermally conductive fillings.

An insulator of an armature includes an upper resin member and a lower resin member. Each of the upper and lower resin members includes decreased thickness portions. Axial positions of the decreased thickness portions of the upper and lower resin members are arranged to overlap at least partially with each other. Each of the upper and lower resin members further includes a rib arranged to project from a corresponding one of the decreased thickness portions. The rib improves the strength of the corresponding decreased thickness portion and reduces the likelihood that any of the decreased thickness portions of the upper and lower resin members will be damaged when the two members are fitted to each other.

A dynamoelectric machine stator core for receiving a pre-formed stator winding includes a core body defining a cylindrical core main peripheral surface. A plurality of axially extending stator slots are circumferentially spaced in the core body. Each of the stator slots defines a slot first section extending radially from the slot base to a slot intermediate radial position and a slot second section extending radially from the slot intermediate radial position towards the core main peripheral surface. The slot first and second sections communicate with each other and are circumferentially offset relative to each other. The slot first and second sections are positioned, configured and sized to facilitate insertion therein of a corresponding conductor section of the stator winding with reduced needs for deforming the latter.

In a method of manufacturing a rotor of an electric motor to be arranged inside a stator, a permanent magnet is formed in a ring-shape, and a rotating shaft and the permanent magnet are concentrically arranged in a mold. Then, a rubber material in a fluid state is poured into a space between the permanent magnet and the rotating shaft to vulcanize and mold a cushioning member having predetermined hardness. The permanent magnet and the rotating shaft are integrally coupled through the cushioning member.

A stator coil includes a plurality of copper strands and a layer of high thermal conductivity polymer disposed adjacent at least one of the copper strands. The high thermal conductivity polymer includes a host polymer and a high thermal conductivity filler. The high thermal conductivity polymer improves heat transfer from the plurality copper strands.