317results about "Windings insulation material" patented technology

The invention relates to the technical field of electromagnetic coils, in particular to a laminated planar spiral coil winding. The laminated planar spiral coil winding is formed by laminating at least two layers of planar spiral coils, the spiral center fitting line formed by each turn of wire is linear, the planar spiral coils occupy the whole winding plane, the strong magnetic center deviates from the geometric center of the planar spiral coils, and the phases of the winding are different in layer. The invention aims to provide competitive choices for the axial flux motor winding, such as high copper full rate, low copper loss, large air gap, easy heat dissipation and low production cost.

A stator for an axial flux machine includes a plurality of units (100; 200; 400) disposed generally circumferentially around an axis. Each of the units (100; 200; 400) is operable to generate a magnetic field generally parallel to the axis. Each of the units (100; 200; 400) respectively includes: an axially extending stator core tooth (102T; 202T; 402T) defining at least part of a stator core, and a set of windings (102C; 202C; 402C) wound around the stator core tooth. The stator includes a heat dissipation arrangement for facilitating dissipation of heat from the stator core during operation of the stator. By facilitating dissipation of heat generated or accumulated in the stator core during operation of the stator, the performance, efficiency and / or lifespan of the stator can be improved.

A pole cover is provided for receiving and guiding a winding on a rotor of an electric motor, comprising multiple segments which extend in a radial direction to a center axis of the pole cover, wherein the segments receive a partial region of the winding of the electric motor, and wherein each of the segments includes a winding region to receive the winding and a segment connection region for connecting to other segments, wherein the winding region and the segment connection region border on each other and the segment connection region is situated closer to the center axis than the winding region. The segment connection regions extend at least partially in the circumferential direction about the center axis and each segment connection region protrudes, in the circumferential direction about the center axis, beyond the adjoining winding region. Multiple decoupling regions are also provided, each being situated between two segment connection regions in the circumferential direction about the center axis. An electric motor having such a pole cover and a method for producing a pole cover are also provided.

The invention comprises a stator (1) for an electric motor, having a basic shape, wherein the basic shape consists of a one-piece insulating material (14) and the stator (1) has a first end region (5), a second end region (6), and a core region (7) arranged between the first end region (5) and the second end region (6), wherein electrical lines (4) for coil windings are embedded in the insulating material (14), wherein the electrical lines (4) run essentially in the transverse direction (11) in the insulating material (14) of the first end region (5) and the second end region (6) and in the longitudinal direction (12) in the insulating material (14) of the core region (7), wherein the core region (7) has at least one sequence of alternatingly arranged first core layers (8) and second core layers (9) in the longitudinal direction (12),wherein the insulating material (14) is formed in the first core layer (8) as a column structure (10) and in the second core layer (9) as a surface structure (21), and wherein ferromagnetic material (13) for forming stator teeth (3) is arranged between the column structures (10) made of insulating material (14) in the first core layers (8). The invention further comprises a method (100) for producing a stator (1).

The invention provides a 10kV explosion-proof motor stator winding turn-to-turn insulation breakdown risk control method and system, and relates to the technical field of motor manufacturing, and the method comprises the steps: determining the existence of a turn-to-turn insulation defect through analyzing a creepage breakdown phenomenon in batch production, and positioning breakdown points which intensively appear at the head and tail turns of a lead end, obtaining a breakdown point position characteristic; based on the position characteristics of the breakdown points, main causes of insulation weakness are obtained through analysis; based on the main reason of weak insulation, a single-sided polyester film reinforced mica tape is selected as an inter-turn insulation material; and performing process verification on the turn-to-turn insulating material to obtain structural characteristic parameters of the insulating material. According to the method, the reliability and consistency of turn-to-turn insulation of the 10kV explosion-proof motor stator winding are improved through full-process control of data-driven defect diagnosis, material selection, process optimization, insulation strengthening and performance verification.

To avoid an increase in manufacturing cost of an electric motor, and increase the space factor of a winding portion while improving the reliability of a conductor wound in a first layer of the winding portion.SOLUTION: An electric motor manufacturing method performs: a first operation of winding a conductor from one end side to another end side of a winding drum in a radial direction of a yoke while leaving a gap between adjacent windings in a first layer; and a second operation of after the first operation, winding the conductor in the first layer so as to be in contact with the winding located at the other end, thereby moving at least a portion of the winding wound in the first operation toward the one end to close the gap.SELECTED DRAWING: Figure 15

An electric winding assembly includes a conductor core having a first end and an opposing second end, an insulation layer overlying the conductor core, and a conductive shield layer overlying the insulation layer. The conductive shield layer includes an insulative carrier circumferentially surrounding the insulation layer and a conductive layer disposed on the insulative carrier, the insulative carrier formed from a material having a thermal rating greater than 180° C., the conductive shield layer having a surface resistivity between 1.5 and 10 ohms per square.

The present application discloses a stator, a generator, a wind turbine generator set, and an anti-corona treatment method. The stator comprises an iron core and a winding; a plurality of mounting slots are distributed at intervals in the iron core in the circumferential direction; the winding is arranged on the iron core, and the winding comprises a plurality of branches; each branch comprises a plurality of coils; each mounting slot is internally provided with one coil; each coil has end parts protruding out of the iron core on the two sides of the iron core in the axial direction; at least one branch is provided with a potting layer, and the potting layer covers the end parts of some of the plurality of coils of the branches; and the working voltage of some of the coils when the generator works at a rated voltage is greater than a voltage anti-corona threshold.

A motor according to the present invention includes: a stator having a stator core and a coil; a rotor having a rotary shaft and a rotation body; a shaft bearing rotatably supporting the rotor; and a molding resin covering the stator. The motor has a coil end that is the coil protruding from the stator core in a shaft center X direction, and has a non-combustible layer provided to cover the coil end. The non-combustible layer is a metallic cover made of, for example, metal. The metallic cover is disposed to cover a periphery of a coil assembly in which the coil is formed on the stator core through an insulator. The metallic cover is integrated with the coil assembly by a molding resin.

A stator (10) includes: a stator core (11) with a slot (14); a coil (12) attached to the stator core (11) with a part of the coil inserted into the slot (14); and insulating paper (30). An opening of the slot (14) in an end surface of the stator core (11) that faces an axial direction includes an expanded portion (18a) whose width is increased in a direction in which a coil end portion of the coil (12) that protrudes from the end surface is bent. The insulating paper (30) is inserted into the slot (14) to insulate the stator core (11) from the coil (12), and accommodated in the expanded portion (18a) with a part of the accommodated insulating paper overlapping twice or more.

The invention discloses a corona-resistant polyimide film based on a core-shell structure nano SiO2 (at) PS filler and a preparation method of the corona-resistant polyimide film, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: dissolving diamine in a solvent under the protection of an inert atmosphere to obtain a diamine solution; preparing a nano SiO2 (at) PS filler dispersion liquid with a core-shell structure; adding the nano SiO2 (at) PS filler dispersion liquid into a diamine solution, fully stirring, and adding dianhydride to obtain polyamide acid resin; and carrying out vacuum negative pressure defoaming on the polyamide acid resin, and then carrying out curtain coating, stretching and imidization to obtain the corona-resistant polyimide film. The preparation method comprises the following steps: carrying out surface amination on a nano SiO2 filler, fixing an ATRP (Atom Transfer Radical Polymerization) initiator, and carrying out surface initiation on ATRP grafted polystyrene to obtain a nano SiO2 (at) PS filler with a core-shell structure; the nanofiller SiO2 (at) PS can effectively avoid the agglomeration phenomenon and is easier to disperse, meanwhile, the nanofiller SiO2 (at) PS has better compatibility in a polyamide acid solution system, and the prepared corona-resistant polyimide film has more uniform corona resistance, insulation and mechanical properties.

The utility model discloses a shielding type underwater thruster stator, which belongs to the technical field of underwater thrusters and comprises a metal shell, metal flanges are respectively welded at two ends of the metal shell, connecting welding holes are formed in the middle parts of the two metal flanges, shielding sleeves are fixedly sleeved in the two connecting welding holes, and the shielding sleeves are connected with the metal flanges. And the middle part of the shielding sleeve penetrates through the inner cavity of the metal shell. According to the utility model, the metal shell, the metal flange and the shielding sleeve are connected through welding, and the stator winding and the stator coil are arranged in the space formed by welding and sealing the metal shell, the metal flange and the shielding sleeve, so that a pressure compensation device is omitted, a sealing ring is not needed for sealing, and pressure compensation liquid is not needed; the problem of pressure compensation liquid leakage does not exist, the underwater propeller is designed to be of a pressure bearing structure and can work underwater for a long time, and the operation safety of the underwater propeller is greatly improved.

A stator (100) for an axial flux electric machine, comprising:-a plurality of stator members (200), each stator member comprising a core sleeve (109) placed between a core (105) and a coil (106); -a housing surrounding the stator members (200) wherein, for each of the stator members (200):-the core sleeve (109) extends at least partially between the top wall (111) and the bottom wall (110), thereby defining in the housing a cavity (600, 700) adapted to receive a cooling fluid flowing at the outside of the core sleeve (109); -at least some of the successive turns of the coil (106) are spaced apart thereby defining a fluid passage (602) towards the core sleeves (109) such that the pressurized cooling fluid supplied to the cavities (600, 700) creates a pressure difference between the outside and the inside of each core sleeve (109) thereby pressing the core sleeve (109) against the respective core (105).

To provide an insulator, a stator, and an electric motor capable of improving molding accuracy and assembling easiness.SOLUTION: An insulator 26 comprises a first insulator 61 and a second insulator 62 mounted from axially both sides of a stator core. The first insulator 61 has a first core end-surface covering portion 65 and a first skirt portion 79. The second insulator 62 has a second core end-surface covering portion 265 and a second skirt portion 279. The insulator has a coil drawing-out portion 77 integrally installed only on the first core end-surface covering portion 65 to draw out a terminal portion of a coil from the first insulator 61 to the outside. An axially longest portion of the second skirt portion 279 is longer in length than an axially longest portion of the first skirt portion 79.SELECTED DRAWING: Figure 6

The present disclosure generally relates to a one-component cationic polymerizable composition including an aromatic epoxy resin, an epoxy reactive diluent, a cationic polymerization initiator, a free radical forming compound and optionally a carboxylic acid and its use in impregnation processes.

A rotary electric machine stator includes: a stator core; a stator coil mounted on the stator core and including coil ends at both ends in an axial direction; and an insulating material portion provided at the coil ends and formed by a foam varnish. The insulating material portion includes, on a surface thereof, an uneven portion caused by foaming.

The application relates to the technical field of stator winding, in particular to a novel stator winding insulation structure of a fan coil motor, which comprises a stator core, the stator core is provided with winding wire slots, the stator core is provided with a stator winding at the winding wire slots, further comprises an insulation sheet main body, the insulation sheet main body is attached to the end face of the stator core, the insulation sheet main body is provided with an inner circular hole, the insulation sheet main body is provided with insulation tooth portions corresponding to the winding wire slots at the inner circular hole, the insulation tooth portions are at least partially bent and inserted into the winding wire slots, and the insulation tooth portions are at least partially clamped between the stator core and the stator winding. The device reduces the manufacturing cost of the motor, reduces the stator repair cost caused by the appearance defect, and improves the production qualified rate and production efficiency.

A stator for a brushless DC motor, the stator comprising: a plurality of coil windings; and a layered stack of laminations positioned around a centre axis, wherein the layered stack of laminations defines an annular shape, and wherein each lamination from the layered stack of laminations has: a first plurality of teeth, wherein the first plurality of teeth extend radially towards the centre axis and define a first plurality of channels between the first plurality of teeth, wherein each channel of the first plurality of channels is configured to receive at least a portion of a coil winding; a second plurality of teeth, wherein the second plurality of teeth extend radially away from the centre axis and define a second plurality of channels between the second plurality of teeth, wherein each channel of the second plurality of channels is configured to receive at least a portion of a coil winding; and wherein each of the first plurality of channels and the second plurality of channels is provided with a layer of electrically insulating ceramic material such that each coil winding of the 15 plurality of coil windings is electrically isolated from the layered stack of laminations.

An electric machine is described comprising a stator with a plurality of slots and an insulating ring covering one end of the stator. The insulating ring is provided with a plurality of chamfered openings aligned with the slots, a circumferential rib, and a recessed area extending from the rib to the openings. Windings are wound within the slots without conventional slot linings and extend away from them.

Provided are an insulated wire and a preparation method thereof, a coil and an electronic / electrical device. The insulated wire includes a conductor and an insulation layer arranged on an outer periphery of the conductor, where a material of the insulation layer is obtained by mixing and pelletizing resin A and resin B. A material obtained by mixing contains units as shown in Formulae 1-3: where a molar proportion of the unit shown in Formula 1 is 3%-17%, a molar proportion of the unit shown in Formula 2 is 37%-77%, and a molar proportion of the unit shown in Formula 3 is 20%-47%. The present invention can improve the adhesion between pure PEEK resin and copper conductor and enhance the flexibility of the insulation material.

An insulated wire and a preparation method therefor, a coil, and an electronic / electrical device are provided. In the preparation method, the thermoplastic polyimide is extruded to mold by adopting the extrusion process, so as to form the insulating layer on the core material, which can significantly improve the production efficiency compared to the traditional multiple-time coating process. The preparation process of the bonding layer and the extrusion process are optimized; the bonding layer is prepared by a specific bonding layer formulation; and then the insulating layer is extruded under a specific negative pressure, so that the prepared thermoplastic polyimide insulating layer has fewer bubbles, and the size of the bubbles is smaller, which ensures the insulating layer to have a higher breakdown voltage.

To provide an insulated wire including a coat that is thin but has excellent insulation performance and a method for producing the same, and a production method that can produce such an insulated wire at a firing temperature of 250°C or lower while reducing the environmental load and cost.SOLUTION: An insulated wire includes a conductor wire, and an insulation film that coats the conductor wire. The insulation film comprises a cured product of an aromatic (poly)ether compound comprising bisphenol A and benzophenone.SELECTED DRAWING: None

The application relates to the technical field of winding wires, and discloses a high-temperature-resistant submersible motor winding wire and a preparation method thereof. The high-temperature-resistant submersible motor winding wire comprises a wire core and a fluoroplastic insulation layer coated on the wire core; the wire core comprises, from inside to outside, a conductor formed by twisting copper wires and a polyimide film layer; a sheath layer is arranged outside the fluoroplastic insulation layer; the sheath layer comprises the following raw materials in parts by weight: polyether ether ketone 35-45 parts, polytetrafluoroethylene 20-30 parts, acrylate rubber 5-15 parts, nano inorganic filler 5-10 parts, antioxidant 0.5-1 part and inorganic fiber 3-9 parts; the melting index of the polyether ether ketone is 10-30 g / 10 min under 380 DEG C and 10 kg. Through the technical scheme, the problem of poor high-temperature resistance of the submersible motor winding wire in the related art is solved.

A stator assembly typically includes at least one stator core assembly that generates a magnetic field to rotate a rotor. The stator core assembly includes a core and a coil wrapped around the core to receive a current thus generating the magnetic field. To improve the performance and manufacturability of the stator assembly, a stator core assembly may include an insulator, disposed between the coil and the core, formed as a single flat sheet. A flat manufacturing process allows greater control of the insulator geometry, a broader range of materials to form the insulator, and patterning of structural features into the insulator to improve assembly and performance. The coil of the stator core assembly may also be electrically coupled to a bus bar using a fastener process and / or a crimping process that consumes less energy and occurs at lower temperatures than conventional soldering or welding processes.

An electrical machine stator can include a stator core (101) having a stator core shape and made of a core material (103), a plurality of windings (105) disposed in the stator core and made of a conductive material (107), and an insulative material (109) surrounding the plurality of windings and configured to electrically insulate each winding from each other adjacent winding, and / or to insulate one or more of the windings from the stator core. The insulative material can be an amorphous metal.

A stator core spool includes a body and a door. The body at least partially defines a channel. The door is movable from an open position, in which a portion of the stator winding is movable into the channel, to a closed position, in which a portion of the stator winding is surrounded by the body and the door.

A curable adhesive sheet includes an electrically insulating substrate including a first major surface and a second major surface opposite to the first major surface. The curable adhesive sheet further includes a first adhesive layer disposed on the first major surface. The first adhesive layer is thermally expandable. The first adhesive layer includes a plurality of first portions alternating with a plurality of second portions such that the first adhesive layer is patterned. Each second portion is disposed between two adjacent first portions. Each first portion includes a thermally expandable adhesive. Each second portion is less thermally expandable than each first portion. The curable adhesive sheet further includes a second curable adhesive layer disposed on the second major surface.

Described herein are polymer compositions including at least 20 wt. % of a liquid crystal polymer (“LCP”); 10 wt. % to 40 wt. % of a flat glass fiber and 15 wt. % to 50 wt. % of boron nitride and / or zinc oxide. It was surprisingly discovered that polymer compositions including an LCP in conjunction with a combination of flat glass fibers and boron nitride and / or zinc oxide had improved thermal conductivity and flexural properties, relative to analogous polymer compositions having round glass fibers in place of the flat glass fibers.

The present invention relates to a high thermal conductive epoxy resin composition and a preparation method and use thereof. In particular, the present invention relates to an epoxy resin composition comprising (a) an epoxy resin, (b) a phenolic resin, (c) an inorganic filler, and (d) an additive, wherein the inorganic filler comprises crystalline silica, the crystalline silica comprises a first crystalline silica, the first crystalline silica has a D50 particle size of about 8-20 μm, a specific surface area of about 1.5-7 m 2 / g, and a total content of the inorganic filler is greater than about 50 wt% based on the total weight of the epoxy resin composition. Compared with other conventional epoxy molding compound solutions, the composition of the present invention, by selecting a combination of characteristic thermal conductive components, while retaining extremely high filling capacity, realizes significant heat dissipation efficiency improvement through its own higher thermal conductivity coefficient.