CN211127357U - Nonlinear load generator stator insulation structure - Google Patents
Nonlinear load generator stator insulation structure Download PDFInfo
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- CN211127357U CN211127357U CN201922456266.8U CN201922456266U CN211127357U CN 211127357 U CN211127357 U CN 211127357U CN 201922456266 U CN201922456266 U CN 201922456266U CN 211127357 U CN211127357 U CN 211127357U
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Abstract
A nonlinear load generator stator insulation structure comprises an iron core and a coil embedded in a stator slot, wherein the coil comprises an electromagnetic wire group and a main insulation structure wrapped outside the electromagnetic wire group, and the electromagnetic wire group consists of a plurality of electromagnetic wires; the electromagnetic wire comprises a copper bar, a corona-resistant polyimide film wrapped outside the copper bar and a mica tape wrapped outside the corona-resistant polyimide film; the main insulating structure comprises a corona-resistant mica tape wrapped outside the electromagnetic wire group and a semiconductor corona-proof layer coated outside the mica tape; the straight line parts of the two coils are bound together through a heat shrinkable insulating protective tape to form a coil winding and are placed in the stator slot, and an interlayer filler strip is arranged between the straight line parts of the two coils; and magnetic slot wedges for fixing coil windings, under-wedge filler strips and slot bottom filler strips are arranged in the stator slots. The main insulation, the fixed insulation and the inter-turn insulation of the whole insulation structure all adopt anticorona materials, which can effectively inhibit the damage of harmonic load to the coil structure and the damage of impact load to the mechanical vibration of the winding, thereby forming an effective and high-performance insulation structure.
Description
Technical Field
The utility model relates to a motor insulation, especially a nonlinear load generator stator insulation system.
Background
With the development of the oil-gas field synchronous generator technology, most of the stator insulation structures of low-voltage motors in the current market adopt an enameled round wire and slot insulation mode, the insulation structure is simple and reliable, but the capacities of impact-resistant loads and nonlinear loads (with high higher harmonic content) are poor, and the cost of foreign similar products is high. Therefore, when the domestic conventional generator set is used in oil and gas field projects, product faults of different degrees, such as insulation corona breakdown, and motor burnout, occur no matter the brand is foreign or domestic. It is therefore desirable to develop a high performance, low cost, harmonic-resistant, impact-resistant load-resistant insulation structure. The improvement of product performance and reliability become vital after the research and development are successful.
Disclosure of Invention
The utility model aims to solve the technical problem that a nonlinear load generator stator insulation system is provided, resistant harmonic, shock-resistant prevents the trouble of insulation damage such as mechanical vibration, corona corrosion that the generator takes place at the operation in-process.
In order to solve the technical problem, the technical scheme of the utility model is that: a nonlinear load generator stator insulation structure comprises an iron core and a coil embedded in a stator slot, wherein the coil comprises an electromagnetic wire group and a main insulation structure wrapped outside the electromagnetic wire group, and the electromagnetic wire group consists of a plurality of electromagnetic wires; the electromagnetic wire comprises a copper bar, a corona-resistant polyimide film wrapped outside the copper bar and a mica tape wrapped outside the corona-resistant polyimide film; the main insulating structure comprises a corona-resistant mica tape wrapped outside the electromagnetic wire group and a semiconductor corona-proof layer coated outside the mica tape; the straight line parts of the two coils are bound together through a heat shrinkable insulating protective tape to form a coil winding and are placed in the stator slot, and an interlayer filler strip is arranged between the straight line parts of the two coils; and magnetic slot wedges for fixing coil windings, under-wedge filler strips and slot bottom filler strips are arranged in the stator slots.
As an improvement, the corona-resistant polyimide film is wrapped outside the copper strip through sintering.
As an improvement, the corona-resistant mica tape with less glue is formed by 2/3 overlapping.
As an improvement, the wedge gasket and the groove bottom gasket are semiconductor gaskets.
Compared with the prior art, the utility model the beneficial effect who brings is:
1. the main insulation, the fixed insulation and the inter-turn insulation of the whole insulation structure all adopt anticorona materials, which can effectively inhibit the damage of harmonic load to the coil structure and the damage of impact load to the mechanical vibration of the winding, thereby forming an effective and high-performance insulation structure;
2. the coils are completely coated with the anti-corona layers, and the potential difference along the inside of the stator slot is small, so that corona in the slot can be effectively prevented;
3. the magnetic slot wedge and the semiconductor filler strip are adopted, so that the stator coil is fixed while the corona damage of the harmonic load is effectively inhibited, and the damage of vibration generated by impact load to a winding can be avoided;
4. the electromagnetic wire is formed by sintering corona-resistant polyimide film and wrapping mica tapes, is an electromagnetic wire compounded by organic and inorganic materials, and has good electrical performance and good insulation life.
Drawings
Fig. 1 is a schematic view of a stator coil structure.
Fig. 2 is a schematic view of a stator coil embedded in a stator slot.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 2, the stator insulation structure of the nonlinear load generator comprises a core and a coil winding embedded in a stator slot. The coil winding is composed of two turns of coils, and each coil comprises an electromagnetic wire group 1 and a main insulation structure 2 wrapped outside the electromagnetic wire group 1.
The electromagnetic wire set 1 is composed of a plurality of electromagnetic wires, each electromagnetic wire comprises a copper bar and an insulating layer wrapped outside the copper bar, and each insulating layer comprises a corona-resistant polyimide film and a mica tape wrapped outside the corona-resistant polyimide film through a sintering process. The electromagnetic wire is formed by sintering corona-resistant polyimide film and wrapping mica tapes, is an electromagnetic wire compounded by organic and inorganic materials, and has good electrical performance and good insulation life.
As shown in fig. 1, the main insulating structure 2 includes a corona-resistant mica tape wrapped outside the electromagnetic wire set and a semiconductor corona-preventing layer coated outside the mica tape. The manufacturing process of the main insulation structure comprises the following steps: the corona-resistant mica tapes with less glue are formed by packaging 2/3 in a stacked mode, then a semiconductor corona-resistant layer is coated on the surface of the mica tapes, and finally the mica tapes are dried and formed. The coils are all coated with the anti-corona layers, and the potential difference along the inside of the stator slot is small, so that the corona in the slot can be effectively prevented.
As shown in fig. 2, the straight portions of the two coils are bound together by a heat shrinkable insulating tape 6 to form a coil winding and are placed in the stator slot, and an interlayer filler strip 5 is provided between the straight portions of the two coils. The coil adopts the insulating protective belt 6 of thermal contraction nature, and in the dip coating stoving process, the mechanical protective belt is heated to shrink, effectively prevents the loss of insulating paint, plays the dip coating effect of easy infiltration loss prevention.
As shown in fig. 2, a magnetic slot wedge 3, a wedge lower filler strip 4 and a slot bottom filler strip 7 for fixing a coil winding are arranged in the stator slot, the slot bottom filler strip 7 is arranged at the bottom of the stator slot and abuts against one side of the coil winding, and the magnetic slot wedge 3 and the wedge lower filler strip 4 are arranged at the opening of the stator slot and abuts against the other side of the coil winding; the wedge bottom filler strip 4 and the groove bottom filler strip 7 are semiconductor filler strips. The magnetic slot wedge and the semiconductor filler strip are adopted, so that the stator coil is fixed while the corona damage of the harmonic load is effectively inhibited, and the damage of vibration generated by impact load to a winding can be avoided.
The main insulation, the fixed insulation and the inter-turn insulation of the whole insulation structure all adopt anticorona materials, which can effectively inhibit the damage of harmonic load to the coil structure and the damage of impact load to the mechanical vibration of the winding, thereby forming an effective and high-performance insulation structure.
Claims (4)
1. A nonlinear load generator stator insulation structure comprises an iron core and a coil embedded in a stator slot, wherein the coil comprises an electromagnetic wire group and a main ground insulation structure wrapped outside the electromagnetic wire group, and the electromagnetic wire group consists of a plurality of electromagnetic wires; the method is characterized in that: the electromagnetic wire comprises a copper bar, a corona-resistant polyimide film wrapped outside the copper bar and a mica tape wrapped outside the corona-resistant polyimide film; the main ground insulation structure comprises a corona-resistant mica tape wrapped outside the electromagnetic wire set and a semiconductor corona-proof layer coated outside the mica tape; the straight line parts of the two coils are bound together through a heat shrinkable insulating protective tape to form a coil winding and are placed in the stator slot, and an interlayer filler strip is arranged between the straight line parts of the two coils; and magnetic slot wedges for fixing coil windings, under-wedge filler strips and slot bottom filler strips are arranged in the stator slots.
2. The nonlinear load generator stator insulation structure of claim 1, wherein: the corona-resistant polyimide film is wrapped outside the copper bar through sintering.
3. The nonlinear load generator stator insulation structure of claim 1, wherein: the corona-resistant mica tape with less glue is formed by 2/3 overlapping.
4. The nonlinear load generator stator insulation structure of claim 1, wherein: the wedge backing strip and the groove bottom backing strip are semiconductor backing strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922456266.8U CN211127357U (en) | 2019-12-31 | 2019-12-31 | Nonlinear load generator stator insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922456266.8U CN211127357U (en) | 2019-12-31 | 2019-12-31 | Nonlinear load generator stator insulation structure |
Publications (1)
| Publication Number | Publication Date |
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| CN211127357U true CN211127357U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922456266.8U Active CN211127357U (en) | 2019-12-31 | 2019-12-31 | Nonlinear load generator stator insulation structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114257012A (en) * | 2020-09-23 | 2022-03-29 | 中车株洲电力机车研究所有限公司 | Insulation structure of linear motor and manufacturing method thereof |
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2019
- 2019-12-31 CN CN201922456266.8U patent/CN211127357U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114257012A (en) * | 2020-09-23 | 2022-03-29 | 中车株洲电力机车研究所有限公司 | Insulation structure of linear motor and manufacturing method thereof |
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