CN114257012A - Insulation structure of linear motor and manufacturing method thereof - Google Patents
Insulation structure of linear motor and manufacturing method thereof Download PDFInfo
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- CN114257012A CN114257012A CN202011008244.6A CN202011008244A CN114257012A CN 114257012 A CN114257012 A CN 114257012A CN 202011008244 A CN202011008244 A CN 202011008244A CN 114257012 A CN114257012 A CN 114257012A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/30—Windings characterised by the insulating material
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/10—Applying solid insulation to windings, stators or rotors
- H02K15/105—Applying solid insulation to windings, stators or rotors to the windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
- H02K3/487—Slot-closing devices
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- Manufacturing & Machinery (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention provides an insulation structure of a linear motor, which comprises: and the impregnation structure is used for bonding the insulation structures of the stators of the linear motors into a whole, and the impregnation structure adopts polyester-imide solvent-free impregnating resin.
Description
Technical Field
The invention relates to the field of motor insulation, in particular to an insulation structure of a linear motor and a manufacturing method of the insulation structure.
Background
The linear motor urban rail vehicle is one of the advanced urban rail vehicles in the world today. The linear motor subway has the advantages of low manufacturing cost, small vibration, low noise, strong climbing capability, superior traction capability, small radius of a passing curve, good safety performance and the like, is very suitable for the requirement of large and medium traffic volume traffic development in large and medium cities, is an important technical breakthrough of wheel-rail traffic and future development trend, and has very wide application prospect. With the wide application of linear motors, the requirements of different application environments on motor insulation systems are different, so that the insulation structure is required to have higher heat resistance, and meanwhile, higher requirements are provided for the manufacturability and the environmental adaptability of the insulation structure. Meanwhile, the linear motor is hung below the vehicle body, the stator is directly exposed outside, no shell is used for protection, rainwater directly splashes onto the coil when the vehicle body runs, sundries on the track can also be directly attached to the surface of the motor, and the severe working condition environment provides high requirements for the insulation structure of the linear motor.
The existing linear motor adopts an epoxy anhydride insulation structure. And after the coil is wrapped with an insulating material, inserting the wire, then carrying out VPI (Vacuum Pressure impregnation) on the stator, setting Impregnating and curing parameters according to the requirements of an epoxy anhydride system, and Impregnating twice with epoxy anhydride Impregnating varnish.
However, with their use in recent years, the disadvantages of epoxy anhydride insulation systems have gradually emerged.
1. With the operation of recent years, the heat resistance of the epoxy anhydride insulation system is found to be slightly insufficient on a linear motor, the heat resistance is slightly poor, and the maximum heat resistance can only reach 180 grades.
2. The manufacturability is poor. The performance of the epoxy anhydride insulation system determines that the epoxy anhydride insulation system is sensitive to moisture in the air, and an anhydride curing agent in the epoxy resin can absorb moisture in the air with repeated opening and closing of the tank, so that the viscosity of the epoxy anhydride resin is increased, the performance of an insulation structure is influenced, and periodic scrapping and waste are caused.
3. In order to ensure safety, the requirements on equipment and the maintenance requirements on the equipment are high. When an anhydride curing agent in an epoxy anhydride system is heated and cured, anhydride volatilizes and coagulates into solids in the inner wall of an oven and an air suction pipeline, and after long-term accumulation, the risk of causing fire disasters exists, so that the requirement on the structure of the oven is high, and the oven and the air suction pipeline need to be cleaned regularly.
4. The environmental adaptability is poor, and under the severe environment condition, the phenomenon that the insulation resistance of the winding of the motor to the ground of the epoxy anhydride insulation system is reduced, even the case of motor burning loss occurs.
Because the epoxy anhydride insulator system shows more and more defects in the application of the epoxy anhydride insulator system in the field of linear motors, in order to solve the problems, the invention only provides a novel insulating structure of the linear motor, and the insulating structure adopts a polyester-imide insulating structure, so that higher heat resistance, manufacturability and environmental adaptability can be achieved.
Disclosure of Invention
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
According to an aspect of the present invention, there is provided an insulation structure of a linear motor, including: and the impregnation structure is used for bonding the insulation structures of the stators of the linear motors into a whole, and the impregnation structure adopts polyester-imide solvent-free impregnating resin.
Still further, the impregnated structure is formed by one vacuum pressure impregnation.
Still further, the insulation structure of the stator includes: and the wire insulation structure covers the wires of the stator and comprises a polyimide film and a double-layer glass ribbon which are wrapped in sequence.
Still further, the insulation structure of the stator further includes: the coil insulation structure is formed by winding the wires and wrapped outside each coil and at least comprises a polyimide film.
Further, the polyimide film is a corona-resistant polyimide film or a non-corona-resistant polyimide film.
Furthermore, the coil insulation structure further comprises a mica tape and a glass ribbon, wherein the polyimide film and the mica tape are alternately half-stacked or flatly wrapped outside the coil, and the glass ribbon is flatly wrapped on the outermost layer of the coil.
Further, the glass ribbon is an alkali-free glass ribbon.
Furthermore, the glass ribbon is woven by fibers treated by the organic silane coupling agent.
Furthermore, the mica tape is a composite mica tape of mica and a reinforcing material.
Further, the reinforcing material is a material of the glass ribbon or a mixed material of the glass ribbon and the polyimide film.
Still further, the mica is flake or powder mica.
Still further, the insulation structure of the stator further includes: the connecting wire insulation structure is bound on the leading-out wire or the central wire of the coil and adopts an alternative half-lap-wrapped mica tape and a flat-wrapped alkali-free glass ribbon structure; the slot insulation structure covers the side surface of the U-shaped wire slot for placing the coil, and the slot insulation structure adopts composite foil; the groove bottom insulation structure covers the bottom surface of the groove body of the U-shaped wire groove and is made of insulation paper; the interlayer insulation structure covers the contact surfaces of the coils in the U-shaped wire slot, and the interlayer insulation structure adopts insulation paper; and the notch insulation structure is arranged at an opening in the U-shaped wire groove and adopts a groove wedge.
Still further, the insulation paper is made of aramid fibers.
Still further, the insulation structure further includes: the protection structure is packaged on the surface of the stator of the linear motor and adopts silica gel pouring sealant.
According to another aspect of the present invention, there is also provided a method of manufacturing an insulation structure of a linear motor, including: and impregnating the stator of the linear motor with polyester-imide solvent-free impregnating varnish after wire embedding so as to bond the insulating structure of the stator into a whole.
Further, the polyester imide solvent-free impregnating varnish impregnation process is completed by one vacuum pressure impregnation.
Still further, the insulation structure of the stator includes a wire insulation structure, and the manufacturing method further includes: forming the wire insulation structure on the surface of the wire of the stator, the forming the wire insulation structure on the surface of the wire of the stator comprising: sintering a polyimide film on the surface of the lead of the stator; and binding a double-layer glass ribbon on the surface of the lead of the stator.
Furthermore, the wire is wound to form a coil, the insulation structure of the stator further comprises a coil insulation structure, and the manufacturing method further comprises the following steps: forming the coil insulation structure outside the coil, the forming the coil insulation structure outside the coil including at least: and a semi-laminated or flat-wrapped polyimide film is arranged outside the coil.
Further, the polyimide film is a corona-resistant polyimide film or a non-corona-resistant polyimide film.
Still further, the forming of the coil insulation structure outside the coil includes: the polyimide film and the mica tape are alternately half-stacked or flatly wrapped outside the coil; and flatly wrapping a layer of glass ribbon on the outermost layer of the coil.
Further, the glass ribbon is an alkali-free glass ribbon.
Furthermore, the glass ribbon is woven by fibers treated by the organic silane coupling agent.
Furthermore, the mica tape is a composite mica tape of mica and a reinforcing material.
Further, the reinforcing material is a material of the glass ribbon or a mixed material of the glass ribbon and the polyimide film.
Still further, the mica is flake or powder mica.
Furthermore, the coils are combined and then respectively placed in a plurality of U-shaped wire slots of the stator, the insulation structure of the stator further comprises a connecting wire insulation structure, a slot bottom insulation structure, an interlayer insulation structure and a slot opening insulation structure, and the manufacturing method further comprises the following steps: half-lap-wrapping mica tapes and flat-wrapping alkali-free glass ribbon are arranged on the leading-out wires or the central wires of the coils to form the connecting wire insulation structure; covering a composite foil on the side surface of the U-shaped wire groove to form the groove insulation structure; covering the bottom surface of the U-shaped wire groove with insulating paper to form the groove bottom insulating structure; covering insulating paper on contact surfaces among a plurality of coils placed in the same U-shaped wire groove to form the interlayer insulating structure; and arranging a slot wedge at the opening of the U-shaped wire slot to form the slot opening insulation structure.
Still further, the insulation paper is made of aramid fibers.
Still further, the stator further includes a guard structure, and the manufacturing method further includes: and integrally packaging the stator of the linear motor by adopting a silica gel pouring sealant to form the protection structure.
Drawings
The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings.
Fig. 1 is a schematic structural view illustrating an insulation structure of a linear motor in an embodiment according to an aspect of the present invention;
FIG. 2 is a schematic flow chart illustrating a coil preparation process in a method for manufacturing an insulation structure according to another aspect of the present invention;
FIG. 3 is a partial flow diagram illustrating a coil preparation process in a method of fabricating an insulation structure according to another aspect of the present invention;
FIG. 4 is a schematic diagram of a coil insulation structure in one embodiment according to another aspect of the present invention;
FIG. 5 is a partial flow diagram illustrating a coil preparation process in a method of fabricating an insulation structure according to another aspect of the present invention;
FIG. 6 is a schematic flow chart illustrating a motor wire-embedding process in a method for manufacturing an insulation structure according to another aspect of the present invention;
fig. 7 is a schematic view of a package structure of an insulation structure in an embodiment according to another aspect of the present invention.
Detailed Description
The following description is presented to enable any person skilled in the art to make and use the invention and is incorporated in the context of a particular application. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to a wide range of embodiments. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In the following detailed description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the practice of the invention may not necessarily be limited to these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present invention.
The reader's attention is directed to all papers and documents which are filed concurrently with this specification and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference. All the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
Note that where used, the designations left, right, front, back, top, bottom, positive, negative, clockwise, and counterclockwise are used for convenience only and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is noted that, where used, further, preferably, still further and more preferably is a brief introduction to the exposition of the alternative embodiment on the basis of the preceding embodiment, the contents of the further, preferably, still further or more preferably back band being combined with the preceding embodiment as a complete constituent of the alternative embodiment. Several further, preferred, still further or more preferred arrangements of the belt after the same embodiment may be combined in any combination to form a further embodiment.
The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.
According to an aspect of the present invention, there is provided an insulation structure of a linear motor.
As will be understood by those skilled in the art, the stator of a linear motor is formed of a plurality of coils, each of which is wound with a set of wires. When the coils are placed, a plurality of coils form a group and are placed in the same wire slot, and lead-out wires, central wires and other connecting wires extend out of the wire slot.
Correspondingly, the insulation structure of the linear motor may include a wire insulation structure for insulating a wire, a coil insulation structure for insulating a coil, a connection wire insulation structure for insulating a connection wire, an insulation structure for insulating a wire groove, an impregnation structure, and the like.
In order to facilitate understanding of the manufacturing method corresponding to the insulation structure of the linear motor, which is described in the present invention, those skilled in the art will mix the description of the insulation structure of the linear motor and the manufacturing method thereof.
The conventional method for manufacturing the insulation structure of the linear motor comprises a coil preparation process, a motor wire embedding process and a motor paint dipping process. Wherein, the coil preparation process is generally used for forming a wire insulation structure and a coil insulation structure; the motor wire embedding process is generally used for forming a connecting wire insulation structure, a slot insulation structure and the like; in the motor paint dipping procedure, the insulating structures formed in the previous procedure are bonded into a whole by using the dipping paint.
In the manufacturing method of the insulation structure of the linear motor, the polyester-imide solvent-free impregnating resin is used as impregnating varnish in the motor impregnating process, namely, the polyester-imide solvent-free impregnating varnish is used for impregnating the stator of the linear motor after wire embedding is completed so as to bond the formed insulation structure into a whole.
Correspondingly, the insulation structure of the linear motor after the motor dip coating process may include, as shown in fig. 1, a dipping structure 1, where the dipping structure 1 integrally bonds the insulation structure of the stator of the linear motor formed before the motor dip coating process. It will be appreciated that the impregnated structure 1 is correspondingly formed from a polyester imide solventless impregnating resin.
As will be understood by those skilled in the art, the insulation structures of the stator of the linear motor formed prior to the motor dip coating process include respective insulation structures formed in the coil preparation process and respective insulation structures formed in the motor winding process.
Furthermore, the motor dip coating process, namely the polyester-imide solvent-free dip coating dipping process, is completed by one-time vacuum pressure dipping. That is, the impregnated structure 1 is formed by one vacuum pressure impregnation.
Compared with the existing epoxy anhydride insulation structure, the polyester imide insulation structure provided by the invention has higher heat resistance, manufacturability and environmental adaptability. The heat-resistant grade can be improved to 200 grade, and the product can be used for a long time at-40 ℃. When the polyester imide insulation structure is formed in the motor paint dipping procedure, the process requirements can be met only by carrying out VPI dipping once, and the polyester imide insulation structure can operate in a complex environment.
Meanwhile, the cost of the polyester-imide insulation structure is lower in material, labor, equipment and energy consumption. The solvent-free polyesterimide has less volatilization and no condensation, so the stability is higher and the safety coefficient is higher.
Further, the coil manufacturing process of the method for manufacturing an insulation structure of a linear motor according to the present invention may include steps S210 to S220 as shown in fig. 2.
Wherein, step S210 is: and forming a lead insulation structure on the surface of the lead of the stator.
The wire of the stator refers to a wire for constituting a coil of the stator, and may also be referred to as an electromagnetic wire. It is understood that the stator of the linear motor includes a plurality of coils, and thus the number of wires of the stator is also plural.
Preferably, the wire insulation structure comprises a polyimide film and a double-layer glass ribbon which are sequentially wrapped on the wire.
Correspondingly, as shown in FIG. 3, step S210 may include steps S211-S212.
Wherein, step S211 is: and sintering the polyimide film on the surface of the lead of the stator.
Step S212 is: and wrapping the double-layer glass ribbon on the surface of the lead of the stator.
That is, the magnet wire is sintered using a double glass ribbon wrapped polyimide film to form a wire insulation structure.
Step S220 is: a coil insulation structure is formed outside the coil.
After the wire insulation structure is formed, the wire having the wire insulation structure is wound and expanded to form a coil. Then, a coil insulation structure is formed outside each coil.
As shown in fig. 1, a coil insulation structure 2 is wrapped around the outside of the coil. Preferably, the coil insulation structure 2 includes at least a polyimide film.
Correspondingly, step S220 includes at least half-wrapping or flat-wrapping the polyimide film outside the coil.
Further preferably, the polyimide films in the wire insulation structure (not specifically shown in fig. 1) and the coil insulation structure 2 may be corona-resistant polyimide films or non-corona-resistant polyimide films.
Further, a specific coil insulation structure may include a polyimide film 21, a mica tape 22, and a glass ribbon 23 as shown in fig. 4. As shown in fig. 4, polyimide films 21 and mica tapes 22 are alternately half-wrapped or flat-wrapped around the outside of the coil. The ribbon of glass filaments 23 is wrapped flat around the outermost portion of the coil 3.
As shown in fig. 4, the mica tapes 22 are spacers between different insulating layers, and the mica tapes 22 are disposed between the coil 3 and the polyimide film 21 and between the polyimide film 21 and the glass ribbon 23.
Alternating means wrapping one or more layers of polyimide film 21 and mica tape 22. In a specific embodiment, the exterior of the coil 3 may be sequentially a plurality of layers of mica tapes 22 and polyimide films 21 alternately wrapped in sequence. The outermost layer is a mica tape 22 and a glass ribbon 23.
Correspondingly, as shown in fig. 5, step S220 includes steps S221 to S222.
Step S221 is: alternating half-lap or flat-wrap polyimide films 21 and mica tapes 22 are outside the coil 3. The number of layers of the polyimide film 21 and the mica tape 22 can be set according to the requirement.
Step S222 is: and a layer of glass ribbon is flatly wrapped on the outermost layer of the coil 3.
Preferably, the mica tape 22 is a composite mica tape of mica and a reinforcing material. Wherein, the mica can be flake or powder mica, and the reinforcing material can be the material of the glass ribbon 23, the mixed material of the glass ribbon and the polyimide film 21 or other reinforcing materials.
The glass ribbon 23 is woven from fibers treated with an organic silane coupling agent. The edge of the glass ribbon 23 made of the fiber is not smooth when being locked, and has good compatibility with impregnating resin in a motor dip coating process, so that the glass ribbon has high paint coating amount and is beneficial to forming the impregnating structure 1.
Preferably, the glass ribbon 23 is an alkali-free glass ribbon.
After the formation of the coil insulation structure is completed, the coil is embedded in a wire slot of the linear motor to form a stator coil. The trunking is generally a U-shaped trunking. A plurality of coils, generally two coils, can be placed in each U-shaped wire slot. Fig. 1 is a simplified illustration of a U-shaped wire slot 4, and as shown in fig. 1, the U-shaped wire slot 4 includes a slot bottom 41 and a slot wall 42. A plurality of coils 3 are arranged in the wire slot 4, and the coils 3 are provided with outgoing wires and central wires which extend out of the U-shaped wire slot and are used for electrifying.
Further, as shown in fig. 1, the insulation structure of the linear motor further includes a connection line insulation structure (not shown), a slot bottom insulation structure 51, an interlayer insulation structure 52, and a slot insulation structure 53.
The connecting wire insulation structure is wrapped on the leading-out wire or the central wire of the coil, and a mica tape and a flat-wrapped alkali-free glass ribbon structure which are alternately half-lapped are adopted. The mica tapes and the alkali-free glass tapes may be made of the same materials as those of the mica tapes 22 and the glass tapes 23.
The slot insulation structure overlies the side surfaces 42 of the U-shaped slots. Preferably, a conventional composite foil can be used as the slot insulation structure.
The groove bottom insulation structure 51 covers the groove bottom 41 of the U-shaped wire groove 4. Preferably, insulating paper commonly used in the art can be used as the trench bottom insulating structure 51.
An interlayer insulating structure 52 covers the contact surfaces of the plurality of coils in the U-shaped wire slot 4, i.e., at a position between the two coils. Preferably, an insulating paper commonly used in the art may be used as the interlayer insulating structure 52.
The slot insulation structure 53 is disposed at an opening of the U-shaped wire slot 4, and is used for sealing off the U-shaped wire slot. Preferably, molded slot wedges are used as the slot insulating structure 53.
As shown in fig. 6, the motor-wiring step in the method of manufacturing the insulation structure of the linear motor includes steps S610 to S650, corresponding to the insulation structure of the linear motor.
Wherein, step S610 is: and the half-lap-covered mica tape and the flat-covered alkali-free glass ribbon are arranged on the leading-out wire or the central wire of the coil 3 to form a connecting wire insulation structure.
Step S620 is: a composite foil is applied to the side surface 42 of the U-shaped wire slot 4 to form a slot insulation structure.
Step S630 is: insulating paper is covered on the bottom surface 41 of the U-shaped wire groove 4 to form a groove bottom insulating structure 51.
Step S640 is: an insulating paper is covered on the contact surface between a plurality of coils placed in the same U-shaped wire slot 4 to form an interlayer insulating structure 52.
Step S650 is: a slot wedge is provided at the opening of U-shaped wire slot 4 to form slot insulation 53. The slot wedge may be a molded slot wedge.
Further, the above-mentioned insulating paper may be made of aramid fiber.
It is understood that after the coil preparation process and the motor winding process are performed, the motor dip coating process using the polyester imide solvent-free impregnating resin may be performed. The procedures and parameters of pre-baking the stator, preheating impregnating resin, preheating vacuum degree and time, impregnating temperature and impregnating time of the stator, dripping time of the stator, curing temperature and curing time of impregnating varnish and the like in the whole motor impregnating procedure are strictly set according to the design requirements of the insulating structure of the linear motor. And (3) detecting the cured stator according to the relevant qualified standards and entering the next procedure after the stator is qualified.
Preferably, the insulation structure of the linear motor of the present invention may further include a motor encapsulation process on the premise of a conventional coil preparation process, a motor wire insertion process, and a motor dip coating process.
Adopt the silica gel casting glue as the encapsulating material of motor encapsulation process, motor encapsulation process carries out whole encapsulation to the motor after the dip coating, and figure 7 shows linear electric motor through the structure schematic diagram after whole encapsulation, can form the continuous and compact protective structure 6 of one deck on linear electric motor's surface after the encapsulation, and this protective structure 6 can effectively prevent the erosion of environmental factors such as water, moisture and sand and dust to the inside insulation system of motor. Meanwhile, the silica gel pouring sealant has the advantages of moderate viscosity, good adhesiveness, excellent toughness, high temperature resistance and low temperature resistance, and improves the possibility of the linear motor working in a complex environment.
It will be understood that the motor dip coating process is also a dip coating of the whole stator of the linear motor, and therefore the protective structure 6 is attached to the surface of the dipping structure 1.
Correspondingly, the method for manufacturing the insulating structure of the linear motor can further comprise the steps corresponding to the motor packaging process: and integrally packaging the stator of the linear motor by adopting silica gel pouring sealant to form a protective structure 6.
While, for purposes of simplicity of explanation, the methodologies are shown and described as a series of acts, it is to be understood and appreciated that the methodologies are not limited by the order of acts, as some acts may, in accordance with one or more embodiments, occur in different orders and/or concurrently with other acts from that shown and described herein or not shown and described herein, as would be understood by one skilled in the art.
The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. It is to be understood that the scope of the invention is to be defined by the appended claims and not by the specific constructions and components of the embodiments illustrated above. Those skilled in the art can make various changes and modifications to the embodiments within the spirit and scope of the present invention, and these changes and modifications also fall within the scope of the present invention.
Claims (28)
1. An insulation structure of a linear motor, comprising:
and the impregnation structure is used for bonding the insulation structures of the stators of the linear motors into a whole, and the impregnation structure adopts polyester-imide solvent-free impregnating resin.
2. The insulation structure of claim 1, wherein said impregnated structure is formed by one vacuum pressure impregnation.
3. The insulation structure of claim 1, wherein the insulation structure of the stator comprises:
and the wire insulation structure covers the wires of the stator and comprises a polyimide film and a double-layer glass ribbon which are wrapped in sequence.
4. The insulation structure of claim 3, wherein the insulation structure of the stator further comprises:
the coil insulation structure is formed by winding the wires and wrapped outside each coil and at least comprises a polyimide film.
5. The insulating structure according to claim 3 or 4, wherein the polyimide film is a corona-resistant polyimide film or a non-corona-resistant polyimide film.
6. The insulation structure of claim 4, wherein the coil insulation structure further comprises mica tapes and glass ribbons, wherein the polyimide films and the mica tapes are alternately half-stacked or flat-wrapped outside the coil, and wherein the glass ribbons are flat-wrapped at the outermost layer of the coil.
7. The insulation structure of claim 6 wherein said glass ribbons are alkali-free glass ribbons.
8. An insulation structure as claimed in claim 6 or 7, wherein said glass ribbons are woven from fibres treated with an organosilane coupling agent.
9. The insulation structure of claim 6, wherein the mica tape is a composite mica tape of mica and a reinforcing material.
10. The insulation structure of claim 9, wherein said reinforcing material is a material of said glass ribbon or a mixed material of said glass ribbon and said polyimide film.
11. An insulation structure as claimed in claim 9, wherein said mica is flake or powder mica.
12. The insulation structure of claim 4, wherein the insulation structure of the stator further comprises:
the connecting wire insulation structure is bound on the leading-out wire or the central wire of the coil and adopts an alternative half-lap-wrapped mica tape and a flat-wrapped alkali-free glass ribbon structure;
the slot insulation structure covers the side surface of the U-shaped wire slot for placing the coil, and the slot insulation structure adopts composite foil;
the groove bottom insulation structure covers the bottom surface of the groove body of the U-shaped wire groove and is made of insulation paper;
the interlayer insulation structure covers the contact surfaces of the coils in the U-shaped wire slot, and the interlayer insulation structure adopts insulation paper; and
the notch insulation structure is arranged at an opening in the U-shaped wire groove and adopts a groove wedge.
13. The insulation structure of claim 12, wherein said insulation paper is made of aramid fibers.
14. The insulation structure of any of claims 1 to 13, further comprising:
the protection structure is packaged on the surface of the stator of the linear motor and adopts silica gel pouring sealant.
15. A method of manufacturing an insulation structure of a linear motor, comprising:
and impregnating the stator of the linear motor with polyester-imide solvent-free impregnating varnish after wire embedding so as to bond the insulating structure of the stator into a whole.
16. The method of claim 15, wherein the polyesterimide solventless impregnating varnish impregnation process is performed by one vacuum pressure impregnation.
17. The method of manufacturing of claim 15, wherein the insulation structure of the stator comprises a wire insulation structure, the method of manufacturing further comprising:
forming the wire insulation structure on the surface of the wire of the stator, the forming the wire insulation structure on the surface of the wire of the stator comprising:
sintering a polyimide film on the surface of the lead of the stator; and
and binding a double-layer glass ribbon on the surface of the lead of the stator.
18. The method of manufacturing of claim 17, wherein the wire is wound to form a coil, the stator insulation structure further comprises a coil insulation structure, and the method further comprises:
forming the coil insulation structure outside the coil, the forming the coil insulation structure outside the coil including at least:
and a semi-laminated or flat-wrapped polyimide film is arranged outside the coil.
19. The production method according to claim 17 or 18, wherein the polyimide film is a corona-resistant polyimide film or a non-corona-resistant polyimide film.
20. The method of manufacturing of claim 18, wherein said forming the coil insulation structure outside the coil comprises:
the polyimide film and the mica tape are alternately half-stacked or flatly wrapped outside the coil; and
and a layer of glass ribbon is flatly wrapped on the outermost layer of the coil.
21. The method of manufacturing of claim 20, wherein the glass ribbon is an alkali-free glass ribbon.
22. The production method according to claim 20 or 21, wherein the glass ribbon is woven from fibers treated with an organic silane coupling agent.
23. The method of manufacturing of claim 20, wherein the mica tape is a composite mica tape of mica and a reinforcing material.
24. The manufacturing method according to claim 23, wherein the reinforcing material is a material of the glass ribbon or a mixed material of the glass ribbon and the polyimide film.
25. The method of claim 23, wherein the mica is flake or powder mica.
26. The method of manufacturing of claim 18, wherein the coils are assembled and then placed in a plurality of U-shaped slots of the stator, the insulation structure of the stator further comprises a connecting wire insulation structure, a slot bottom insulation structure, an interlayer insulation structure, and a slot insulation structure, and the method further comprises:
half-lap-wrapping mica tapes and flat-wrapping alkali-free glass ribbon are arranged on the leading-out wires or the central wires of the coils to form the connecting wire insulation structure;
covering a composite foil on the side surface of the U-shaped wire groove to form the groove insulation structure;
covering the bottom surface of the U-shaped wire groove with insulating paper to form the groove bottom insulating structure;
covering insulating paper on contact surfaces among a plurality of coils placed in the same U-shaped wire groove to form the interlayer insulating structure; and
and arranging a slot wedge at the opening of the U-shaped wire slot to form the slot insulation structure.
27. The method of manufacturing of claim 26, wherein the insulating paper is made of aramid fibers.
28. The method of manufacturing of claims 15-27, wherein the stator further comprises a guard structure, the method further comprising:
and integrally packaging the stator of the linear motor by adopting a silica gel pouring sealant to form the protection structure.
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