CN116345763A - High-working field intensity insulation structure of motor stator coil - Google Patents
High-working field intensity insulation structure of motor stator coil Download PDFInfo
- Publication number
- CN116345763A CN116345763A CN202310287911.6A CN202310287911A CN116345763A CN 116345763 A CN116345763 A CN 116345763A CN 202310287911 A CN202310287911 A CN 202310287911A CN 116345763 A CN116345763 A CN 116345763A
- Authority
- CN
- China
- Prior art keywords
- insulation
- end part
- reinforced
- stator coil
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention belongs to the technical field of stator coil insulation, and particularly relates to a high-working field intensity insulation structure of a motor stator coil. The technical proposal is as follows: the high-working field intensity insulation structure of the motor stator coil comprises a linear part main insulation coated on a coil groove part electromagnetic wire, an end part R part reinforced insulation and an end part R part main insulation which are sequentially wrapped on a coil end part R part electromagnetic wire from inside to outside; the main insulation of the straight line part and the main insulation of the end part R part comprise a glass cloth reinforced small-glue mica tape and a film reinforced small-glue mica tape which are mixed in a staggered way, and the reinforced insulation of the end part R part is a glass cloth reinforced polyimide film or a polyimide film which is semi-overlapped and wrapped on an electromagnetic wire of the end part R part of the coil. The invention provides a high-working field intensity insulation structure of a motor stator coil.
Description
Technical Field
The invention belongs to the technical field of stator coil insulation, and particularly relates to a high-working field intensity insulation structure of a motor stator coil.
Background
The stator coil insulation technology is a key core technology of the motor, the service life of the motor mainly depends on the service life of the stator bar insulation, and the electric performance of the main insulation of the stator coil plays a crucial role in the safe and reliable operation of the motor. The main insulation working field intensity of the stator coil is the ratio of the rated phase voltage of the motor to the main insulation thickness, the design value of the main insulation working field intensity of the stator coil reflects the advancement of motor insulation design, and the higher the working field intensity is, the thinner the main insulation thickness of the coil is, and the better the main insulation heat dissipation capacity is.
The research result shows that the working field intensity of the main insulation of the stator coil is improved by 30% (namely, the thickness of the main insulation is reduced by about 20% -30%), the slot utilization rate of the motor is improved by 17% -25%, the motor efficiency is increased by 0.1% -0.3%, the temperature rise of the stator is reduced by 3K-8K, and the motor weight is reduced by 5% -15%. The main insulation of the stator coil is thinned, the working field intensity is improved, the manufacturing cost of the motor can be effectively reduced, the motor volume is reduced, and a series of problems of transportation, installation and the like are solved.
At present, the 6kV high-voltage motor stator coil main insulation mica tape in the industry is wrapped into 5 layers, the thickness is 1.30mm, the working field intensity is 2.66kV/mm, the 10kV high-voltage motor stator coil main insulation mica tape is wrapped into 8 layers, the thickness is 2.0mm, the working field intensity is 2.78kV/mm, and the index requirements of high-efficiency motor efficiency and temperature rise cannot be met. Therefore, a stator coil insulation structure with high working field intensity needs to be developed, and under the condition of ensuring the main insulation electrical intensity of the stator coil, the working field intensity is further improved, and the main insulation thickness is reduced, so that the purposes of increasing the utilization rate of a motor slot, reducing copper loss and mechanical loss and improving the motor efficiency are achieved.
Disclosure of Invention
In order to solve the above problems in the prior art, an object of the present invention is to provide a high-working-field-intensity insulation structure for a stator coil of a motor.
The technical scheme adopted by the invention is as follows:
the high-working field intensity insulation structure of the motor stator coil comprises a linear part main insulation coated on a coil groove part electromagnetic wire, an end part R part reinforced insulation and an end part R part main insulation which are sequentially wrapped on a coil end part R part electromagnetic wire from inside to outside; the main insulation of the straight line part and the main insulation of the end part R part comprise a glass cloth reinforced small-glue mica tape and a film reinforced small-glue mica tape which are mixed in a staggered way, and the reinforced insulation of the end part R part is a glass cloth reinforced polyimide film or a polyimide film which is semi-overlapped and wrapped on an electromagnetic wire of the end part R part of the coil.
As a preferable scheme of the invention, the electromagnetic wire is made of polyimide-fluorine 46 composite film sintered polyester film mica tape wrapped flat copper wire or polyimide-fluorine 46 composite film sintered polyimide film mica tape wrapped flat copper wire.
As a preferable scheme of the invention, the insulation thickness of the electromagnetic wire is 0.40 mm-0.60 mm.
As the preferable scheme of the invention, for the rated voltage 6kV high-voltage motor, the R part of the end part is reinforced with insulation, and a rubber powder mica tape or a polyimide film in 1 layer of glass cloth reinforced polyimide film is half-laminated from the 10mm position of the stator core to the coil end part direction, and the wrapping length of the R part of the end part is 60 mm-120 mm; the main insulation of the R part of the end part comprises 3.5 layers of glass cloth reinforced little rubber powder mica tapes and film reinforced little rubber powder mica tapes which are mixed in a staggered and half-folded mode.
As a preferable scheme of the invention, for a rated voltage 6kV high-voltage motor, the main insulation of the straight line part comprises 3.5 layers of glass cloth reinforced little rubber powder mica tapes and film reinforced little rubber powder mica tapes which are mixed in a staggered and half-folded manner, and the wrapping thickness of the main insulation of the straight line part is 0.93mm.
As the preferable scheme of the invention, for the rated voltage 10kV high-voltage motor, the reinforced insulation of the R part of the end part is half-overlapped with 1-2 layers of glass cloth reinforced polyimide film from the 10mm position of the stator core to the coil end part direction, and the reinforced insulation wrapping length of the R part of the end part is 80-160 mm; the main insulation of the R part of the end part comprises 5.5-6.5 layers of glass cloth reinforced little rubber powder mica tapes and film reinforced little rubber powder mica tapes which are mixed in a staggered and half-folded way.
As a preferable scheme of the invention, for a rated voltage 10kV high-voltage motor, the main insulation of the linear part comprises 5.5-6.5 layers of glass cloth reinforced little rubber powder mica tapes and film reinforced little rubber powder mica tapes which are mixed in a staggered and half-folded manner, and the thickness of the main insulation wrapping of the linear part is 1.46-1.72 mm.
As a preferable scheme of the invention, the main insulation of the linear part is coated with a groove part anti-corona structure, and the groove part anti-corona structure is a low-resistance anti-corona belt with the thickness of 0.06 mm.
As a preferable scheme of the invention, the main insulation of the R part of the end part is externally coated with an end part anti-corona structure, and the end part anti-corona structure is a high-resistance anti-corona belt with the thickness of 0.13 mm; the end part anti-corona structure is coated with a protective layer.
The beneficial effects of the invention are as follows:
1. the invention greatly improves the main insulation working field intensity of the motor stator coil, has excellent electrical strength, effectively improves the full rate of the motor stator slot, reduces the motor size, reduces copper loss and mechanical loss, reduces the temperature rise of the stator, and has great economic benefit.
2. The invention increases the mechanical strength of the main insulation of the R part of the end part of the stator coil, effectively avoids the risk of insulation mechanical stress damage of the notch area caused by correction in the processes of carrying, transporting and inserting the stator coil, and improves the running stability and reliability of the stator winding.
3. According to the invention, on the premise of ensuring the insulation electrical property of the stator coil, the main insulation of the stator coil is thinned, the main insulation working field intensity is improved, the wrapping layer number of the main insulation mica tape of the stator coil of the 6kV motor is thinned from 5 layers to 3.5 layers, the thickness is thinned from 1.30mm to 0.93mm, the main insulation is thinned by 28.8%, the working field intensity is improved from 2.66kV/mm to 3.75kV/mm, and the working field intensity is improved by 40.8%; the efficiency of the 6kV high-voltage motor is improved by 0.1%, the temperature is reduced by 3K, the weight of the motor is reduced by 12%, and the cost and the efficiency are obvious.
4. On the premise of ensuring the insulation electrical property of the stator coil, the main insulation of the stator coil is thinned, the main insulation working field intensity is improved, the wrapping layer number of the main insulation mica tape of the stator coil of the 10kV motor is thinned from 8 layers to 5.5 layers to 6.5 layers, the thickness is thinned from 2.08mm to 1.46mm to 1.72mm, the main insulation is thinned by 17.3% -30.0%, the working field intensity is improved from 2.78kV/mm to 3.36kV/mm to 3.97kV/mm, and the working field intensity is improved by 20.9% -42.8%; the efficiency of the 10kV high-voltage motor is improved by 0.1-0.2%, the temperature rise is reduced by 3-5K, the weight of the motor is reduced by 11-16%, and the cost reduction and the efficiency enhancement are obvious.
5. The stator coil slot part corona-preventing structure is thinned, and the motor slot filling rate is further increased; the thickness of the stator coil end part anti-corona structure is reduced, the bevel edge clearance of the stator winding end part is further increased, and the motor corona starting voltage level is improved.
Drawings
Fig. 1 is a schematic structural view of coil slot insulation;
FIG. 2 is a schematic view of the structure of the insulation of the R part of the coil end;
fig. 3 is a schematic view of the structure of the coil end R portion reinforcing insulation.
In the figure: 1-electromagnetic wire; 2-main insulation of the straight part; 3-a trough anti-corona structure; 4-the R part of the end part is reinforced with insulation; 5-main insulation of the R part of the end part; 6-end anti-corona structure; 7-a protective layer.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
As shown in fig. 1 to 3, the high working field intensity insulation structure of the stator coil of the motor in this embodiment aims to thin the thickness of the main insulation 2 of the linear part of the stator coil and improve the working field intensity of the main insulation 2 of the linear part of the stator coil on the premise of not reducing the electrical performance of the main insulation of the stator coil, so that the working field intensity of the main insulation 2 of the linear part of the stator coil is improved to 3.97kV/mm. Meanwhile, insulation reinforcement treatment is carried out on the R part of the coil end part, so that the electrical strength of the R part of the end part is improved, and the thickness of the low-resistance anti-corona layer and the thickness of the high-resistance anti-corona layer are reduced. The method has the characteristics of simple operation and wide applicability, improves the slot filling rate of the motor stator, reduces the motor size, reduces copper loss and mechanical loss, and reduces the temperature rise of the stator.
The specific technical scheme is as follows:
(1) The stator coil electromagnetic wire 1 uses polyimide-fluorine 46 composite film sintered polyester film mica tape wrapped flat copper wire or polyimide-fluorine 46 composite film sintered polyimide film mica tape wrapped flat copper wire with excellent electrical property and mechanical property, and the insulation thickness of the electromagnetic wire 1 is 0.40-0.60 mm.
(2) After the stator coil electromagnetic wire 1 is wound and molded, epoxy modified wire glue is coated on the linear part of the wire, 1 layer of polytetrafluoroethylene film with the thickness of 0.03mm is half-laminated, and the linear part of the wire is subjected to hot molding, so that the flatness of the wire is improved. The hot pressing temperature is 170-190 ℃, and the heat preservation time is not less than 30 minutes.
(3) For rated voltage 6kV high-voltage motor, main insulation 5 structure of stator coil end R position: binding the R part of the end part to strengthen insulation 4 before binding the main insulation mica tape, and half-overlapping 1 layer of glass cloth reinforced polyimide film from the 10mm part of the stator core to the coil end part direction to wrap the rubber powder mica tape or polyimide film, wherein the binding length ranges from 60mm to 120mm, as shown in figure 3; wrapping the main insulation 5 of the end part R part on the surface of the reinforced insulation 4 of the end part R part, and mixing the main insulation 5 of the end part R part in a staggered and half-overlapped manner to form a 3.5-layer glass cloth reinforced small-glue mica tape and a film reinforced small-glue mica tape.
(4) For a rated voltage 6kV high-voltage motor, a stator coil straight line part main insulation 2 structure comprises: the stator coil straight line part is mainly insulated 2, is mixed in a staggered way, is half-folded and wrapped with 3.5 layers of glass cloth reinforced little rubber powder mica tape and film reinforced little rubber powder mica tape, the thickness of the main insulation wrapping is 0.93mm, the wrapping tension of the mica tape is 50N-60N, and the main insulation working field intensity is 3.75kV/mm.
(5) For a rated voltage 10kV high-voltage motor, a main insulation 5 structure at the R part of the end part of a stator coil is as follows: binding the R part of the end part to strengthen insulation 4 before binding the main insulation mica tape, and half-overlapping 1-2 layers of glass cloth reinforced polyimide film from the 10mm part of the stator core to the coil end part direction to obtain a rubber powder mica tape or polyimide film with binding length ranging from 80mm to 160mm, as shown in figure 3; wrapping the main insulation 5 of the end part R part on the surface of the reinforced insulation 4 of the end part R part, and staggering and mixing the main insulation 5 of the end part R part and half-folding 5.5-6.5 layers of glass cloth reinforced little rubber powder mica tapes and film reinforced little rubber powder mica tapes.
(6) For a rated voltage 10kV high-voltage motor, a linear part main insulation 2 structure of a stator coil comprises the following steps: the main insulation 2 of the straight line part of the stator coil is staggered, mixed and half-folded with 5.5-6.5 layers of glass cloth reinforced little rubber powder mica tape and film reinforced little rubber powder mica tape, the wrapping thickness of the main insulation 2 of the straight line part is 1.46-1.72 mm, the wrapping tension of the mica tape is 50-60N, and the working field intensity of the main insulation is 3.36-3.97 kV/mm.
(7) The stator coil groove part anti-corona structure 3 uses a low-resistance anti-corona belt with reduced thickness, and the low-resistance anti-corona belt with the thickness of 0.06mm is thinned by a conventional low-resistance anti-corona belt with the thickness of 0.09mm, so that the motor groove filling rate is further increased.
(8) The stator coil end anti-corona structure 6 uses a high-resistance anti-corona belt with reduced thickness, and the high-resistance anti-corona belt with the thickness of 0.20mm is thinned into a high-resistance anti-corona belt with the thickness of 0.13mm by a conventional high-resistance anti-corona belt with the thickness of 0.20mm, so that the bevel edge gap of the stator coil end is further increased, and the motor corona voltage level is improved.
(9) Before the stator coil is embedded into the iron core, a cold pressing tool is used for cold pressing the blank stator coil, wherein the cold pressing size is that the width size of the coil is 0.3-0.5 mm smaller than the groove size of the iron core.
(10) Before the white blank stator coil is inserted, the notch of the iron core is protected by using 0.08mm thick aramid fiber paper, and the stator coil is integrally pressed into the iron core slot during the coil insertion.
(11) After the integral coil inserting of the stator coil is completed, vacuum pressure impregnation is carried out by using heat-resistant grade H environment-friendly solvent-free impregnating resin, the impregnating resin consists of high-purity epoxy resin and high-temperature resistant resin, and the environment-friendly high-temperature resistant impregnating resin matched with a special latent curing agent is prepared by regulating the viscosity by using low-viscosity hyperbranched unsaturated polyester, so that the three-proofing performance is excellent.
(12) In the whole vacuum pressure impregnation process of the motor, the change trend of the capacitance of the stator winding of the motor is monitored, the insulation impregnation condition of the stator winding of the motor is judged according to the increase rate of the capacitance test curve, and when the increase rate of the capacitance of the stator winding is less than or equal to 0.5%/h, the main insulation impregnation of the stator winding is good.
(13) After the vacuum pressure impregnation of the motor is finished, adopting a rotary baking mode to ensure that the impregnating resin is reserved in the main insulation of the stator winding, improving the compactness of the main insulation of the stator winding, and enabling the rotating speed of the rotary baking to be 1-5 r/min.
The invention greatly improves the main insulation working field intensity of the motor stator coil, has excellent electrical strength, effectively improves the full rate of the motor stator slot, reduces the motor size, reduces copper loss and mechanical loss, reduces the temperature rise of the stator, and has great economic benefit.
The invention increases the mechanical strength of the main insulation 5 at the R part of the end part of the stator coil, effectively avoids the risk of insulation mechanical stress damage in the notch area caused by correction in the processes of carrying, transporting and inserting the stator coil, and improves the running stability and reliability of the stator winding.
According to the invention, on the premise of ensuring the insulation electrical property of the stator coil, the main insulation of the stator coil is thinned, the main insulation working field intensity is improved, the wrapping layer number of the main insulation mica tape of the stator coil of the 6kV motor is thinned from 5 layers to 3.5 layers, the thickness is thinned from 1.30mm to 0.93mm, the main insulation is thinned by 28.8%, the working field intensity is improved from 2.66kV/mm to 3.75kV/mm, and the working field intensity is improved by 40.8%; the efficiency of the 6kV high-voltage motor is improved by 0.1%, the temperature is reduced by 3K, the weight of the motor is reduced by 12%, and the cost and the efficiency are obvious.
On the premise of ensuring the insulation electrical property of the stator coil, the main insulation of the stator coil is thinned, the main insulation working field intensity is improved, the wrapping layer number of the main insulation mica tape of the stator coil of the 10kV motor is thinned from 8 layers to 5.5 layers to 6.5 layers, the thickness is thinned from 2.08mm to 1.46mm to 1.72mm, the main insulation is thinned by 17.3% -30.0%, the working field intensity is improved from 2.78kV/mm to 3.36kV/mm to 3.97kV/mm, and the working field intensity is improved by 20.9% -42.8%; the efficiency of the 10kV high-voltage motor is improved by 0.1-0.2%, the temperature rise is reduced by 3-5K, the weight of the motor is reduced by 11-16%, and the cost reduction and the efficiency enhancement are obvious.
The thickness of the stator coil groove part anti-corona structure 3 is reduced, and the motor groove fullness rate is further increased; the thickness of the stator coil end anti-corona structure 6 is reduced, the bevel edge clearance of the stator winding end is further increased, and the motor corona starting voltage level is improved.
Example 1:
a main insulation high-working field intensity insulation structure of a stator coil of a 10kV high-voltage motor and electrical performance measurement thereof. The insulation structure of the stator coil of the high-voltage motor in the embodiment is shown in fig. 1 and 2, and comprises a linear part main insulation coated on a coil slot part electromagnetic wire 1, an end part R part reinforced insulation 4 and an end part R part main insulation 5 which are sequentially wrapped on a coil end part R part electromagnetic wire 1 from inside to outside; the linear part main insulation and the end part R part main insulation 5 comprise glass cloth reinforced small-rubber-powder mica tapes and film reinforced small-rubber-powder mica tapes which are mixed in a staggered mode, and the end part R part reinforced insulation 4 is a rubber-powder mica tape or a polyimide film in a glass cloth reinforced polyimide film which is wrapped on the coil end part R part electromagnetic wire 1 in a semi-overlapping mode.
The electromagnetic wire 1 is a polyimide-fluorine 46 composite film sintered polyester film mica tape wrapped flat copper wire, and the insulation thickness is 0.60mm. The main insulation is formed by staggered half-overlapping of epoxy glass mica tapes with less rubber powder and polyimide film mica tapes with less rubber powder. The end part R part reinforced insulation 4 is formed by half-overlapping a rubber powder mica tape in 2 layers of glass cloth reinforced polyimide films from the 10mm position of the stator core to the coil end part direction, and the binding length is 120mm. The slot part anti-corona structure 3 is formed by half overlapping 1 layer of low-resistance anti-corona belt on the main insulation surface of the coil slot part. The end anti-corona structure 6 and the protective layer 7 are a 1-layer high-resistance anti-corona belt and a 1-layer heat shrinkage belt which are half-folded at the end of the coil. The high-working field intensity insulation structure of the stator coil of the 10kV high-voltage motor is shown in table 1.
Table 1 high operating field intensity insulation structure of stator coil of 10kv high voltage motor.
The main insulation of the slot part of the stator coil is staggered and half-stacked on a full-automatic taping machine to form a thin film few-glue mica tape with the thickness of 0.13mm multiplied by 25mm and an epoxy glass few-glue mica tape with the thickness of 0.14mm multiplied by 25mm, the single-sided binding thickness of the main insulation is controlled to be 1.59mm, the working field intensity of the main insulation is 3.63kV/mm, the heat-resistant grade H-grade environment-friendly solvent-free impregnating resin is used for vacuum pressure impregnating, baking and curing, and the electrical performance of the test coil is shown in Table 2.
Table 2 high operating field strength stator coil electrical performance.
The invention is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present invention, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present invention, fall within the scope of protection of the present invention.
Claims (9)
1. A high-working field intensity insulation structure of a motor stator coil is characterized in that: the coil comprises a linear part main insulator coated on a coil groove part electromagnetic wire (1), and further comprises an end part R part reinforced insulator (4) and an end part R part main insulator (5) which are sequentially wrapped on the coil end part R part electromagnetic wire (1) from inside to outside; the linear part main insulation and the end part R part main insulation (5) comprise glass cloth reinforced small-glue-powder mica tapes and film reinforced small-glue-powder mica tapes which are mixed in a staggered mode, and the end part R part reinforced insulation (4) is a glass cloth reinforced polyimide film or polyimide film which is semi-laminated and wrapped on an electromagnetic wire (1) at the end part R part of the coil.
2. A high operating field strength insulation structure for a stator coil of an electric machine as set forth in claim 1, wherein: the electromagnetic wire (1) is made of polyimide-fluorine 46 composite film sintered polyester film mica tape wrapped flat copper wire or polyimide-fluorine 46 composite film sintered polyimide film mica tape wrapped flat copper wire.
3. A high operating field strength insulation structure for a stator coil of an electric machine as set forth in claim 2, wherein: the insulation thickness of the electromagnetic wire (1) is 0.40-0.60 mm.
4. A high operating field strength insulation structure for a stator coil of an electric machine as set forth in claim 1, wherein: for a rated voltage 6kV high-voltage motor, a rubber powder mica tape or a polyimide film in 1 layer of glass cloth reinforced polyimide film is half-laminated from a 10mm position of a stator core to the coil end direction of an end part R part reinforced insulation (4), and the wrapping length range of the end part R part reinforced insulation (4) is 60-120 mm; the main insulation (5) at the R part of the end part comprises 3.5 layers of glass cloth reinforced little rubber powder mica tapes and film reinforced little rubber powder mica tapes which are mixed in a staggered and half-folded mode.
5. A high operating field strength insulation structure for a stator coil of an electric machine as set forth in claim 1, wherein: for a rated voltage 6kV high-voltage motor, the main insulation of the straight line part comprises 3.5 layers of glass cloth reinforced small-glue powder mica tapes and film reinforced small-glue powder mica tapes which are mixed in a staggered and half-folded mode, and the wrapping thickness of the main insulation of the straight line part is 0.93mm.
6. A high operating field strength insulation structure for a stator coil of an electric machine as set forth in claim 1, wherein: for a rated voltage 10kV high-voltage motor, a rubber powder mica tape or a polyimide film in 1-2 layers of glass cloth reinforced polyimide films are half-laminated from a 10mm position of a stator core to the direction of the coil end part, wherein the wrapping length of the reinforced insulation (4) at the end part R part is 80-160 mm; the main insulation (5) at the R part of the end part comprises 5.5-6.5 layers of glass cloth reinforced little rubber powder mica tapes and film reinforced little rubber powder mica tapes which are mixed in a staggered and half-folded mode.
7. A high operating field strength insulation structure for a stator coil of an electric machine as set forth in claim 1, wherein: for a rated voltage 10kV high-voltage motor, the main insulation of the straight line part comprises 5.5-6.5 layers of glass cloth reinforced little rubber powder mica tapes and film reinforced little rubber powder mica tapes which are mixed in a staggered and half-folded mode, and the thickness of the main insulation wrapping of the straight line part is 1.46-1.72 mm.
8. A high operating field strength insulation structure for a stator coil of an electric machine as set forth in claim 1, wherein: the main insulation of the straight line part is coated with a groove part anti-corona structure (3), and the groove part anti-corona structure (3) is a low-resistance anti-corona belt with the thickness of 0.06 mm.
9. A high operating field strength insulation structure for a stator coil of an electric machine as set forth in claim 1, wherein: an end part anti-corona structure (6) is coated outside the main insulator (5) at the R part of the end part, and the end part anti-corona structure (6) is a high-resistance anti-corona belt with the thickness of 0.13 mm; the end part anti-corona structure (6) is coated with a protective layer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310287911.6A CN116345763A (en) | 2023-03-22 | 2023-03-22 | High-working field intensity insulation structure of motor stator coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310287911.6A CN116345763A (en) | 2023-03-22 | 2023-03-22 | High-working field intensity insulation structure of motor stator coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116345763A true CN116345763A (en) | 2023-06-27 |
Family
ID=86880155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310287911.6A Pending CN116345763A (en) | 2023-03-22 | 2023-03-22 | High-working field intensity insulation structure of motor stator coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116345763A (en) |
-
2023
- 2023-03-22 CN CN202310287911.6A patent/CN116345763A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6750400B2 (en) | Graded electric field insulation system for dynamoelectric machine | |
| US20180182507A1 (en) | Continuously Transposed Conductors And Assemblies | |
| US20170033634A1 (en) | Hydroelectrical machine coil insulation system and method | |
| CN102983692B (en) | Ultra-thin insulation process for major insulation of high-voltage motor stator | |
| CN116345763A (en) | High-working field intensity insulation structure of motor stator coil | |
| CN104795923B (en) | High heat conductive insulating structure and preparation method thereof | |
| CN111371268B (en) | Method for manufacturing stator bar with double-layer composite main insulation structure | |
| US6927342B1 (en) | Insulation for electrical conductors that produces no partial discharges | |
| RU2291542C2 (en) | Stepped electric filed insulation system for dynamoelectric machine | |
| CN113824235B (en) | 10 kV-level motor insulation system | |
| CN103296811A (en) | Interturn insulating structure of super-thin 6kV high-voltage motor and manufacturing method of interturn insulating structure | |
| CN103280908A (en) | Turn-to-turn insulation structure of ultra-thin 10kV high-voltage motor and manufacturing method thereof | |
| CN102983656A (en) | 10 kilovolt level high-voltage motor insulation structure and manufacturing method thereof | |
| CN107154711A (en) | A kind of motor formed coil insulation thining method | |
| JPS6319709A (en) | High voltage insulating conductor | |
| CN207184198U (en) | The insulation system of wound rotor coil | |
| CN104917321B (en) | A kind of 10KV high-voltage motors formed coil and its processing method | |
| CN203339831U (en) | Interturn insulating structure of super-thin 6kV high-voltage motor and insulating system comprising same | |
| CN117394625A (en) | Insulating hot-pressing area and hot-pressing process method for motor stator coil | |
| CN205304444U (en) | High thermal insulation structure of high -pressure high efficiency motor more than 3kV level | |
| CN212675947U (en) | Composite film sintered lead for wind driven generator coil | |
| CN212304933U (en) | Stator assembly and motor | |
| CN203312948U (en) | 10-kilovolt motor insulation system and interturn insulation structure thereof | |
| CN102231306A (en) | Method for manufacturing winding wires | |
| CN110999036B (en) | Coil with a cover strip made of a high-performance material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |