CN212850024U

CN212850024U - Stator

Info

Publication number: CN212850024U
Application number: CN202022257507.9U
Authority: CN
Inventors: 张春晖; 阚乃杰
Original assignee: Jiangsu Jiaxuan Intelligent Industrial Technology Co ltd
Current assignee: Jiangsu Jiaxuan Intelligent Industrial Technology Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-03-30
Anticipated expiration: 2030-10-12

Abstract

The utility model discloses a stator relates to insulating technical field, the stator includes: a coil winding and an insulating structure for insulating the coil winding; the coil winding comprises at least two coils, and the insulating structure comprises a coating insulating layer and at least one isolating insulating layer; the isolation insulating layer is located adjacent two between the coil, every layer the isolation insulating layer all includes first insulating layer (3) and second insulating layer (4) of inseparable laminating, the cladding insulating layer cladding is in coil winding surface, the cladding insulating layer is including arranging fifth insulating layer (13), third insulating layer (5) and fourth insulating layer (6) established in proper order, the utility model discloses a set up multilayer insulating layer, improve the insulating properties, the high temperature resistance ability and the resistant breakdown capability of coil.

Description

Stator

Technical Field

The utility model relates to an insulating technical field, concretely relates to stator.

Background

The mature technology of the frequency converter leads to the vigorous development of the variable-frequency speed-regulating permanent magnet motor. The frequency converter adopts high-frequency pulse frequency, the pulse frequency lifting time is very short, so that high voltage is generated in a motor winding, the voltage pulse peak value is much higher than the rated voltage, and as the voltage between a coil and a coil in the same phase is possibly very high and voltage stress also exists in the phase-to-phase voltage, the first turn or the last turn of one coil or a plurality of coils can be adjacent to adapt to all the composite stress of the motor winding for supplying power to the frequency converter. With sufficient dielectric stress between the turns, the air between the winding wires may break down electrically to create a spark, which may be referred to as a partial discharge. Meanwhile, the three-phase variable-frequency permanent magnet motor has the characteristic of no asynchronous motor, a counter potential exists at the rated rotating speed, the stress between coils is increased, and in addition, the permanent magnet on the variable-frequency permanent magnet motor has strict requirements on the temperature change, so that the insulation system needs to be improved, and the insulation property and the temperature resistance of the variable-frequency permanent magnet motor are improved as much as possible.

Chinese patent CN208369341U discloses a water-immersed insulation structure and a motor, which are sequentially provided with an enameled wire, an interlayer insulation and a slot wedge in a slot insulation, wherein the slot insulation is made of polyimide film or composite material NHN. The coil in the insulating structure adopts the enameled wire, a plurality of turns of the enameled wire in each coil are not arranged by special measures, the end part and the adjacent part are separated by the conductor bundle, in extreme cases, a single turn of the coil is randomly embedded, the voltage penetrates through the whole coil before reaching the connecting lead, the maximum dielectric stress is borne on the first turns of the winding, the insulating property is low, the breakdown is easy, the heat resistance is poor, and the aging is easy; meanwhile, in the insulating structure in the prior art, the enameled wire is protected from being safely off-line, and the slot insulating paper is required to be laid at the slot opening, so that the difficulty of an off-line process is increased, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of background art, the utility model provides a stator that insulating nature is high, high temperature resistant and resistant puncture.

The utility model adopts the technical proposal that: a stator comprising a coil winding and an insulating structure for insulating the coil winding, the coil winding comprising at least two coils, the insulating structure comprising a cladding insulating layer and at least one insulating spacer layer; keep apart the insulating layer and locate adjacent two between the coil, every layer keep apart the insulating layer and all include the first insulation layer 3 and the second insulation layer 4 of inseparable laminating, the cladding insulating layer cladding is in coil winding surface, the cladding insulating layer is including arranging fifth insulating layer 13, third insulating layer 5 and the fourth insulating layer 6 of establishing in proper order, fifth insulating layer 13 with coil winding surface is inseparable laminating, its insulating nature height, high temperature resistant and puncture resistant.

The stator in, the coil is formed by many flat copper wires stack in proper order, the coil outsourcing has the polyester imide film, makes many flat copper wires rule form the coil, further improves the resistant puncture power of coil, the synthetic simple process of polyester imide film simultaneously, reduction in production cost.

In the stator of the present invention, the first insulating layer 3 is an insulating paper, and the second insulating layer 4 is a polyester imide film, which improves the insulating property between the coils.

In the stator, the third insulating layer 5 is a polyester imide film, the fourth insulating layer 6 is an insulating paper, and the insulating paper which is not easy to wear is placed on the outmost layer of the cladding insulating layer, so that the wear resistance of the cladding insulating layer is improved.

In the stator, the fifth insulating layer 13 wraps up the coil winding surface for with the fixed coil winding that forms of each coil, further improve coil winding's resistance to breakdown and insulating nature simultaneously.

The stator of the present invention further comprises stator teeth 1 and a stator yoke, wherein the coating insulation layer is located between the coil winding and the stator teeth 1.

In the stator of the present invention, the stator may be a tooth-yoke integrated type, the cladding insulating layer may be located between two adjacent stator teeth 1, and the coil winding may be located inside the cladding insulating layer.

The stator in, the stator takes the tooth yoke disconnect-type, 1 both sides of stator tooth are all installed the cladding insulating layer, the coil winding suit in on the stator tooth 1, make the cladding insulating layer is located the coil winding with between the stator tooth 1, be convenient for install and dismantle the stator tooth 1 that has the coil winding.

In the stator, the outer surface of the stator is coated with an insulating paint layer, so that the high temperature resistance of the stator and the coil winding is further improved.

The utility model has the advantages that:

1. the three layers of insulating layers are arranged outside the coil winding, and the two layers of insulating layers are arranged among the coils in the coil winding, so that the insulativity, the high temperature resistance and the breakdown resistance of the stator are improved.

2. The stator and the coil winding are integrally dipped to form an insulating paint layer, so that the high temperature resistance of the stator and the coil winding is further improved, the stator and the coil winding are more aging-resistant, and the service life of the stator and the coil winding is prolonged.

3. Through using the flat copper wire, need not to stack up interim groove insulated paper when the off-line, reduce the technology degree of difficulty of the off-line, adopt the stator of tooth yoke disconnect-type simultaneously, preferentially install insulation winding on stator tooth 1, then stator tooth 1 reinstallates on the stator yoke, and the technical requirement to the master of the off-line is lower on the off-line technology for it is simpler to roll off the line, reduces installation time when practicing thrift the manpower, saves manufacturing cost.

Drawings

Fig. 1 is a sectional view of a stator of the present invention;

FIG. 2 is a cross-sectional view of the coil winding of the present invention;

shown in the figure are: the stator comprises stator teeth 1, slot wedges 2, a first insulating layer 3, a second insulating layer 4, a third insulating layer 5, a fourth insulating layer 6, a first coil 7, a second coil 8, a first straight section 9, a first bent section 10, a second straight section 11, a second bent section 12 and a fifth insulating layer 13.

Detailed Description

Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While specific embodiments of the invention are shown in the drawings, it will be understood, however, that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

It should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Certain terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, various names may be used to refer to a component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The following description is of the preferred embodiment of the invention, and is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the invention. The protection scope of the present invention is subject to the limitations defined by the appended claims.

Example 1:

in this embodiment, a stator includes: the coil winding comprises at least two coils, and the insulating structure comprises a coating insulating layer and at least one isolating insulating layer.

In this embodiment, an isolation insulating layer is disposed between any two adjacent coils, and each isolation insulating layer includes a first insulating layer 3 and a second insulating layer 4 that are tightly attached to each other.

In this embodiment, the coating insulating layer is coated on the outer surface of the coil winding, the coating insulating layer includes a fifth insulating layer 13, a third insulating layer 5 and a fourth insulating layer 6, which are sequentially arranged, and the fifth insulating layer 13 is coated on the outer surface of the coil winding, so that the fifth insulating layer is tightly attached to the outer surface of the coil winding, and the insulating property, the high temperature resistance and the breakdown resistance of the stator are improved.

In this embodiment, the number of coils in the coil winding and the thickness of the insulating structure can be determined according to actual conditions.

Example 2:

as shown in fig. 1-2, in a stator of the present embodiment, a coil winding and an insulating structure for insulating the coil winding are included, the coil winding includes two coils, and the insulating structure includes a covering insulating layer and a separating insulating layer.

In a stator of this embodiment, an isolation insulating layer is disposed between two adjacent coils, and the isolation insulating layer includes a first insulating layer 3 and a second insulating layer 4 that are closely attached to each other.

In the stator of this embodiment, the cladding insulating layer cladding is at the coil winding surface, and the cladding insulating layer is including arranging fifth insulating layer 13, third insulating layer 5 and fourth insulating layer 6 in proper order, and fifth insulating layer 13 is closely laminated with the surface of coil winding, improves the insulating nature, high temperature resistance and the breakdown resistance of stator.

In the present embodiment, two coils of the coil winding are respectively provided as the first coil 7 and the second coil 8, and the first coil 7 is fitted outside the second coil 8.

In this embodiment, first coil 7 is formed by many flat copper wires stack in proper order, and the cladding of 7 surfaces of first coil has the polyester imide film, and second coil 8 is formed by many flat copper wires stack in proper order, and the cladding of 8 surfaces of second coil has the polyester imide film, and the rule forms each coil, improves the insulating properties of each coil, and polyester imide film's synthesis simple process can reduction in production cost simultaneously.

In this embodiment, the coil winding is divided into four segments, including: a first straight section 9, a first curved section 10, a second straight section 11 and a second curved section 12.

In this embodiment, the first insulating layer 3 is insulating paper, the second insulating layer 4 is a polyester imide film, and the thickness of the first insulating layer 3 is: 0.1-10mm, preferably 0.3 mm; the thickness of the second insulating layer 4 is 0.1 to 10mm, preferably 0.1mm, to improve the insulation between the coils.

In the present embodiment, the shape of the first insulating layer 3 is adapted to the contact surface between the first coil 7 and the second coil 8, so that the first insulating layer 3 is sandwiched between the first coil 7 and the second coil 8, and the shape of the second insulating layer 4 is adapted to the contact surface between the first coil 7 and the second coil 8, so that the second insulating layer 4 is sandwiched between the first coil 7 and the second coil 8.

In the embodiment, the third insulating layer 5 is located between the fourth insulating layer 6 and the coil winding, the third insulating layer 5 is a polyester imide film, the fourth insulating layer 6 is insulating paper, and the insulating paper is not easy to wear, so that the insulating paper is in contact with the stator teeth, and the wear resistance of the coated insulating layer is reduced.

In this embodiment, the fourth insulating layer 6 is insulating paper, the third insulating layer 5 is a polyester-imide film, and the thickness of the fourth insulating layer 6 is: 0.1-10mm, preferably 0.3 mm; the thickness of the third insulating layer 5 is 0.1 to 10mm, preferably 0.1mm, to improve the insulation of the coil winding.

In the embodiment, the fifth insulating layer 13 is wrapped on the outer surface of the coil winding, and the fifth insulating layer 13 is made of a polyester imide film, and the thickness of the polyester imide film is 0.1-10mm, preferably 0.1mm, and is used for fixing each coil to form the coil winding and further improving the breakdown resistance and the insulation property of the coil winding.

In this embodiment, the stator further has stator teeth 1, a stator yoke and slot wedges 2, wherein both sides of one end of each stator tooth 1, which is not in contact with the stator yoke, have grooves, and the slot wedges 2 can be inserted into the grooves of two adjacent stator teeth 1, so that an internal space is formed among the stator teeth, the stator yoke and the slot wedges 2 for installing the coil windings and the insulation structure.

In the present embodiment, the insulating coating layer is provided between the coil winding and the stator teeth 1, thereby improving the insulation among the coil winding, the stator teeth 1, and the stator yoke.

In the embodiment, the stator is integrated by a tooth and a yoke, the first straight section 9 or the second straight section 11 of the insulating coil is respectively positioned between two adjacent stator teeth 1 of the stator, when the insulating layer is installed, the fourth insulating layer 6 is preferentially paved between two adjacent stator teeth 1 of the stator, then the third insulating layer 5 is placed above the fourth insulating layer 6, the first straight section 9 of the coil winding is inserted between two adjacent stator teeth 1, the second straight section 11 of the coil winding is inserted between the other two adjacent stator teeth 1, and then the slot wedge 2 is inserted into the groove of the two adjacent stator teeth 1, so that the slot wedge 2 can firmly fix the coil winding in the stator.

In this embodiment, the installed stator and coil winding are integrally immersed in the high-voltage epoxy anhydride insulating paint, and an insulating paint layer is formed outside the stator, so that the high-temperature resistance of the whole stator is improved, the aging speed of the stator is reduced, and the service life of the stator is prolonged.

Example 3:

in the embodiment, the stator adopts a tooth-yoke separation type, when the insulating layers are installed, two pieces of third insulating layers 5 are preferentially paved on two sides of one stator tooth 1 of the stator respectively, then fourth insulating layers 6 are placed on the outer sides of the third insulating layers 5 on two sides of the stator tooth 1 respectively, namely, the third insulating layers 5 are positioned between the fourth insulating layers 6 and the stator tooth 1, then the coil winding is sleeved on the stator tooth 1, the third insulating layers 5 and the fourth insulating layers 6 are clamped between the first straight section 9 of the coil winding and one side of the stator tooth 1, the third insulating layers 5 and the fourth insulating layers 6 are also clamped between the second straight section 11 of the coil winding and the other side of the stator tooth 1, the stator tooth with the coil winding and the insulating structure are preferentially and individually installed and then installed on the stator yoke as a single whole, so that the technical requirements of a offline worker are lower in the offline process, the coil inserting device has the advantages that coil inserting is simple, labor cost is saved, when a certain coil winding goes wrong, the stator teeth with the coil winding and the insulating structure can be detached and maintained, the stator teeth with the coil winding and the insulating structure which are maintained are installed on the stator yoke, and the stator is convenient to install, detach and maintain.

In the present embodiment, a 0.2mm thick polyester imide film is used for each of the first insulating layer 3 and the third insulating layer 5, and an 0.3mm thick insulating paper is used for each of the second insulating layer 4 and the fourth insulating layer 6.

Example 4:

in the embodiment, each stator tooth 1 with the coil winding and the insulating structure is immersed in the high-voltage epoxy anhydride insulating varnish, and then the stator teeth 1 with the coil winding, the insulating structure and the insulating varnish layer are independently installed on the stator yoke, so that the high temperature resistance of each stator tooth 1 with the coil winding and the insulating structure is improved, and the service life of the stator is further prolonged. When a certain coil winding has a problem, the stator tooth with the coil winding and the insulating structure can be detached and maintained, then the stator tooth 1 with the coil winding and the insulating structure which are maintained is immersed in the high-voltage epoxy anhydride insulating paint again, and then a new stator tooth 1 with the coil winding, the insulating structure and the insulating paint layer is independently installed on the stator yoke, so that the maintained stator still has good insulation, high temperature resistance and breakdown resistance.

Claims

1. A stator comprising a coil winding and an insulation structure for insulating the coil winding, wherein the coil winding comprises at least two coils, and the insulation structure comprises a cladding insulation layer and at least one insulating insulation layer; the isolation insulating layer is located adjacent two between the coil, every layer the isolation insulating layer all includes first insulating layer (3) and second insulating layer (4) of inseparable laminating, the cladding insulating layer cladding is in coil winding surface, the cladding insulating layer is including arranging fifth insulating layer (13), third insulating layer (5) and fourth insulating layer (6) established in proper order, fifth insulating layer (13) with coil winding surface is inseparable laminating.

2. The stator according to claim 1, wherein the coil is formed by sequentially stacking a plurality of flat copper wires, and the coil is wrapped with a polyester imide film.

3. A stator according to claim 1, characterized in that the first insulating layer (3) is insulating paper and the second insulating layer (4) is a polyester-imide film.

4. A stator according to claim 1, characterized in that said third insulating layer (5) is a polyester-imide film and said fourth insulating layer (6) is an insulating paper.

5. A stator according to claim 1, further comprising stator teeth (1) and a stator yoke, wherein said coating insulation is located between said coil windings and said stator teeth (1).

6. A stator according to claim 5, characterized in that the stator is of a tooth-yoke integrated type, the coating insulation layer is located between two adjacent stator teeth (1), and the coil winding is located inside the coating insulation layer.

7. A stator according to claim 5, characterized in that the stator is of a split-yoke type, the insulating cover layer is mounted on both sides of the stator teeth (1), and the coil winding is sleeved on the stator teeth (1).

8. A stator according to claim 1, wherein the outer surface of the stator is further coated with a layer of insulating paint.