CN117294052A - Flywheel energy storage motor and flywheel energy storage device - Google Patents
Flywheel energy storage motor and flywheel energy storage device Download PDFInfo
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- CN117294052A CN117294052A CN202311587900.6A CN202311587900A CN117294052A CN 117294052 A CN117294052 A CN 117294052A CN 202311587900 A CN202311587900 A CN 202311587900A CN 117294052 A CN117294052 A CN 117294052A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 75
- 238000004804 winding Methods 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 37
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- 229920000647 polyepoxide Polymers 0.000 claims abstract description 16
- 229920002379 silicone rubber Polymers 0.000 claims description 10
- 239000004945 silicone rubber Substances 0.000 claims description 10
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- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
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- 238000009413 insulation Methods 0.000 abstract description 12
- 239000011810 insulating material Substances 0.000 description 22
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Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
- H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The application relates to the technical field of flywheel energy storage and discloses a flywheel energy storage motor and a flywheel energy storage device, wherein the flywheel energy storage motor comprises a machine base and a stator assembly, the stator assembly is arranged in the machine base, and the stator assembly comprises a stator core, a stator winding, a first insulating layer and a second insulating layer; the first insulating layer is encapsulated on the outer surfaces of the stator winding and the stator core, and the second insulating layer is encapsulated on the outer surface of the first insulating layer; the high-low temperature resistance of the second insulating layer material is greater than that of the first insulating layer material, and the toughness of the second insulating layer material is greater than that of the first insulating layer material; the bond strength of the first insulating layer material is greater than the bond strength of the second insulating layer material. The flywheel energy storage motor aims at solving the technical problem that the epoxy resin is easy to crack, so that the stator winding loses insulation protection.
Description
Technical Field
The application relates to the technical field of flywheel energy storage, in particular to a flywheel energy storage motor and a flywheel energy storage device.
Background
Flywheel energy storage motors are the core components of flywheel energy storage systems for converting electrical energy into mechanical energy to accelerate the flywheel and, when needed, to convert stored mechanical energy into electrical energy.
The stator packaging structure of the flywheel energy storage motor is compact and firm in design and can accommodate the flywheel rotor so as to ensure safe operation of the flywheel rotor. The flywheel energy storage motor often operates in a low vacuum environment, and the stator winding of the flywheel energy storage motor is isolated from the external vacuum environment by adopting an epoxy resin encapsulation mode at the present stage, and the stator winding is easy to crack under the high-low temperature state or under the condition of abrupt temperature change, so that the stator winding loses insulation protection, partial discharge is caused, and the reliability of an insulation system of the flywheel energy storage system is seriously threatened.
Disclosure of Invention
The utility model aims at providing a flywheel energy storage motor and flywheel energy storage device to solve epoxy and fracture easily, lead to stator winding to lose insulating protection's technical problem.
In a first aspect, the present application provides a flywheel energy storage motor, including a housing and a stator assembly, where the stator assembly is disposed inside the housing, and the stator assembly includes a stator core, a stator winding, a first insulation layer, and a second insulation layer; the first insulating layer is encapsulated on the outer surfaces of the stator winding and the stator core, and the second insulating layer is encapsulated on the outer surface of the first insulating layer;
the high-low temperature resistance of the second insulating layer material is greater than that of the first insulating layer material, and the toughness of the second insulating layer material is greater than that of the first insulating layer material; the bond strength of the first insulating layer material is greater than the bond strength of the second insulating layer material.
In a second aspect, the present application provides a flywheel energy storage device comprising the flywheel energy storage motor.
The application provides a flywheel energy storage motor, its beneficial effect lies in:
the flywheel energy storage motor of this application sets up inside and outside two-layer insulating layer at the stator surface, and the inlayer is first insulating layer, and the skin is the second insulating layer. In terms of the bonding strength of materials, the first insulating layer is better than the second insulating layer, the first insulating layer is used for packaging the outer surfaces of the stator winding and the stator core, and the insulating materials can be more stably solidified on the outer surfaces of the stator winding and the stator core, so that the stator winding and the stator core are isolated and protected; in the aspect of high and low temperature resistance and toughness of the material, the second insulating layer is superior to the first insulating layer, the second insulating layer is used for packaging the outer surface of the first insulating layer so as to isolate and protect the first insulating layer, even if the inner insulating layer of the material cracks in a high and low temperature state or under the condition of sudden temperature change, the outer insulating layer of the material still keeps the insulating property, and the stator winding and the stator core can be continuously and effectively isolated and protected. The flywheel energy storage motor of the embodiment adopts the composite filling structure formed by the inner insulating material and the outer insulating material, the outer insulating material has better toughness and enough elasticity than the inner insulating material, the high-low temperature resistance of the outer insulating material is stronger than that of the inner insulating material, the reliability of isolating the stator winding from the external vacuum environment is effectively improved, the defect that the epoxy pouring sealant is easy to crack is overcome, and the safety performance of the flywheel energy storage motor is enhanced.
Drawings
Fig. 1 is a schematic structural diagram of a flywheel energy storage motor according to an embodiment of the present disclosure;
fig. 2 is a schematic cross-sectional view of a flywheel energy storage motor according to an embodiment of the present application with a first insulating layer and a second insulating layer removed;
fig. 3 is a schematic cross-sectional view of a flywheel energy storage motor according to an embodiment of the present disclosure with a second insulating layer removed;
fig. 4 is a schematic cross-sectional view of a flywheel energy storage motor according to an embodiment of the present disclosure;
FIG. 5 is another cross-sectional schematic view of a flywheel energy storage motor provided in accordance with an embodiment of the present application;
FIG. 6 is an enlarged view at X in FIG. 5;
fig. 7 is an enlarged view at Y in fig. 5.
The figures are labeled as follows: 100. a base; 11. an annular groove; 111. a first annular groove; 112. a second annular groove; 12. an annular step; 200. a stator assembly; 21. a stator core; 22. a stator winding; 23. a first insulating layer; 24. a second insulating layer; 25. annular bulges; 251. a first boss; 252. a second protruding portion; 300. and (5) compacting the sheet.
Detailed Description
The detailed description of the present application is further described in detail below with reference to the drawings and examples. The following examples are illustrative of the present application, but are not intended to limit the scope of the present application.
In the description of the present application, it should be noted that, in the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. are based on the positional relationship shown in the drawings, only for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus and elements in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
In the description of the present application, it should be understood that the terms "first," "second," and the like are used in the present application to describe various information, but the information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the present application.
Flywheel energy storage motors are a type of motor system that is capable of converting electrical energy into mechanical energy and storing the mechanical energy as rotational kinetic energy, essentially utilizing rotational inertia to store and release energy. The windings of the flywheel energy storage motor are composed of wires or coils, and the windings are used for conducting current. These wires or coils are subjected to an electric current during operation of the motor, generating an electromagnetic field and performing electromagnetic energy conversion. In order to ensure the safety, reliability and performance of the motor, the windings are often required to be insulated to prevent short circuits and electrical shocks, to prevent electrical breakdown, to provide electromagnetic shielding, etc. Therefore, the insulation protection of the windings is a key factor for ensuring the stable and efficient operation and improving the safety of the flywheel energy storage motor.
In the related art, flywheel energy storage motors use epoxy resin as an insulating layer to encapsulate and cure the internal components of the motor, and because epoxy resin has excellent electrical insulation and chemical resistance, wires, stator windings, and other electronic components in the motor can be effectively isolated and protected. However, when the flywheel energy storage motor operates at a high temperature, the thermal stress or structural stress generated in the epoxy resin may be greater than the strength of the cured product, so that the epoxy resin may crack, or the temperature of the flywheel energy storage motor rises or drops suddenly during start-stop, the rapid temperature change may cause the epoxy resin to thermally expand or shrink, and the internal stress thereof accumulates, so that the epoxy resin may crack. Therefore, the traditional epoxy resin encapsulation protection is unreliable, the insulation protection effect is affected by the external temperature and the temperature change, and the stator winding is contacted with external vacuum to generate the dangerous condition of partial discharge.
Example 1
As shown in fig. 1 and 4, an embodiment of the present application provides a flywheel energy storage motor, which includes a housing 100 and a stator assembly 200, wherein the stator assembly 200 is disposed inside the housing 100, and the stator assembly 200 includes a stator core 21, a stator winding 22, a first insulating layer 23 and a second insulating layer 24; the first insulating layer 23 is encapsulated on the outer surfaces of the stator winding 22 and the stator core 21, and the second insulating layer 24 is encapsulated on the outer surface of the first insulating layer 23; wherein the high-low temperature resistance of the second insulating layer 24 material is greater than that of the first insulating layer 23 material, and the toughness of the second insulating layer 24 material is greater than that of the first insulating layer 23 material; the adhesive strength of the material of the first insulating layer 23 is greater than the adhesive strength of the material of the second insulating layer 24.
Based on above-mentioned technical scheme, this application sets up inside and outside two-layer insulating layer, and the inlayer is first insulating layer 23, and the skin is second insulating layer 24. The first insulating layer 23 is superior to the second insulating layer 24 in terms of the bonding strength of materials, the first insulating layer 23 is used for encapsulating the outer surfaces of the stator winding 22 and the stator core 21, and the insulating materials can be more stably solidified on the outer surfaces of the stator winding 22 and the stator core 21, so that the stator winding 22 and the stator core 21 are isolated and protected; the second insulating layer 24 is superior to the first insulating layer 23 in terms of high and low temperature resistance and toughness of the material, and the second insulating layer 24 is used to encapsulate the outer surface of the first insulating layer 23 to isolate and protect the first insulating layer 23, even if the inner insulating material cracks in a high and low temperature state or in a temperature shock, the outer insulating material maintains its insulating properties in a high and low temperature state or in a temperature shock, and the stator winding 22 and the stator core 21 can be continuously and effectively isolated and protected. The flywheel energy storage motor of the embodiment adopts the composite filling structure formed by the inner insulating material and the outer insulating material, the outer insulating material has better toughness and enough elasticity than the inner insulating material, the high-low temperature resistance of the outer insulating material is stronger than that of the inner insulating material, the reliability of isolating the stator winding from the external vacuum environment is effectively improved, the defect that the epoxy pouring sealant is easy to crack is overcome, and the safety performance of the flywheel energy storage motor is enhanced.
Specifically, as shown in fig. 2, in the flywheel energy storage motor structure, the stator winding 22 and the stator core 21 are two key components of the motor. Among them, the stator core 21 is a main supporting structure of the stator assembly 200, and is generally made of a high magnetic conductive material, such as a silicon steel sheet, etc., which functions to concentrate and guide a magnetic field, improve electromagnetic induction efficiency, and reduce energy loss. The stator core 21 is designed to take into consideration the magnetic flux density, iron loss, hysteresis loss and the like, and is structured by superposing a series of insulating sheets, so that the eddy current loss and the hysteresis loss are reduced. The stator winding 22 is a coil made of wire wound partially around the stator core 21, and functions to generate an electromagnetic field to interact with a rotating motor rotor to generate torque, thereby achieving energy conversion. The design of the stator windings 22 requires consideration of the current, voltage, frequency, and power of the motor, and is wound and connected in a specific manner according to the specific design requirements of the windings to ensure efficient operation and stable performance of the motor.
As an embodiment, as shown in fig. 3, the first insulating layer 23 covers the outer surfaces of the stator winding 22 and the stator core 21, and the first insulating layer 23 is filled in the gap between the stator winding 22 and the stator core 21.
Specifically, the present embodiment adopts a potting method to wrap the first insulating layer 23 material around the outer surfaces of the stator winding 22 and the stator core 21 and fill the gap between the stator winding 22 and the stator core 21, so as to ensure that the first insulating layer 23 material can cover the whole surfaces of the stator winding 22 and the stator core 21 and is stably cured on the outer surfaces of the stator winding 22 and the stator core 21, thereby effectively isolating and protecting the stator winding 22 and the stator core 21.
As an embodiment, as shown in fig. 3 and 4, the first insulating layer 23 has a gap with the base 100, and the second insulating layer 24 is filled in the gap between the first insulating layer 23 and the base 100.
Specifically, in the present embodiment, the first insulating layer 23 covers the stator winding 22 and the stator core 21, and the second insulating layer 24 is used to encapsulate the outer surface of the first insulating layer 23 and fill the gap between the first insulating layer 23 and the housing 100. On the one hand, the material of the second insulating layer 24 has stronger toughness than that of the first insulating layer 23, a certain gap is reserved between the first insulating layer 23 and the stand 100, and when the first insulating layer 23 expands and contracts, the material of the first insulating layer 23 can be prevented from generating thermal stress to crack rapidly; on the other hand, the second insulating layer 24 material can cover the entire surface of the first insulating layer 23, sufficiently isolating and protecting the first insulating layer 23, thereby indirectly isolating and protecting the stator winding 22 and the stator core 21.
As a preferred embodiment, the gap between the first insulating layer 23 and the base 100 is greater than or equal to 2 mm, in other words, the thickness of the second insulating layer 24 is greater than or equal to 2 mm, so that the first insulating layer 23 can be effectively isolated and protected.
As an embodiment, as shown in fig. 5, the inner wall of the base 100 is provided with an annular groove 11, and the side of the second insulating layer 24 facing the base 100 is provided with an annular protrusion 25, and the annular protrusion 25 is embedded in the annular groove 11.
Specifically, the inner wall of the stand 100 is provided with an annular groove 11, the second insulating layer 24 is provided with a corresponding annular protrusion 25, and the annular protrusion 25 is embedded into the annular groove 11 to adapt to the high-low temperature change of the motor body. For example, in a high temperature state, the first insulating layer 23 is expanded by heating to push away to two side positions, and the annular protrusion 25 of the second insulating layer 24 is embedded into the annular groove 11 of the stand 100, so that the threat of expansion of the first insulating layer 23 to the joint of the second insulating layer 24 and the stand 100 can be resisted, and the sealing effect of the second insulating layer 24 is ensured.
As an embodiment, the inner wall of the stand 100 is provided with a plurality of annular grooves 11, and the side of the second insulating layer 24 facing the stand 100 is provided with a plurality of annular protrusions 25, and each annular protrusion 25 is embedded in each annular groove 11 in a one-to-one correspondence.
Specifically, as shown in fig. 5, the inner walls of the four corners of the housing 100 are provided with a plurality of annular grooves 11, which protect the first insulating layers 23 of the four corners of the housing 100. The annular groove 11 is not limited to the inner walls of the four corners of the housing 100, and one or more annular grooves 11 may be provided on the surface of the second insulating layer 24 contacting the housing 100. In practical applications, more annular grooves 11 are correspondingly disposed according to the heated portion of the base 100 and the thermal stress concentration position of the first insulating layer 23, so as to maintain the sealing effect between the second insulating layer 24 and the base 100.
As a preferred embodiment, as shown in fig. 6, the annular groove 11 includes a first annular groove 111 and a second annular groove 112, the opening of the first annular groove 111 is along the radial direction of the housing 100, and the opening of the second annular groove 112 is along the axial direction of the housing 100; the annular projection 25 includes a first projection 251 and a second projection 252, the first projection 251 being correspondingly fitted into the first annular groove 111, and the second projection 252 being correspondingly fitted into the second annular groove 112.
Specifically, one or more first annular grooves 111 are disposed in the radial direction of the housing 100, one or more second annular grooves 112 are disposed in the axial direction of the housing 100, in other words, the annular grooves 11 are disposed in both the axial direction and the radial direction of the housing 100, and the first protruding portion 251 and the second protruding portion 252 are respectively embedded into the first annular groove 111 and the second annular groove 112, so as to resist the thermal expansion and contraction changes of the first insulating layer 23 in the horizontal and vertical directions, and ensure the sealing effect of the second insulating layer 24 to the maximum extent.
Illustratively, as shown in fig. 7, the present embodiment is illustrated with the second insulating layer 24 disposed at one top corner of the housing 100, the housing 100 being provided with two annular grooves 11 in the axial direction and two annular protrusions 25 in the radial direction, respectively, and the second insulating layer 24 being provided with two annular protrusions 25 in the axial direction and the radial direction, respectively. Wherein, the thermal expansion coefficient of the second insulating layer 24 is larger than that of the stand 100, when the second insulating layer 24 is expanded by heating, the B, D, F, G surface of the annular bulge 25 is tightly sealed; when the second insulating layer 24 cools and contracts, the A, C, E, H faces contract and seal, thereby ensuring the sealing effect of the second insulating layer 24.
As an embodiment, as shown in fig. 5, the inner wall of the housing 100 includes an annular step 12, a side surface of the annular step 12 is provided with a first annular groove 111, and an end surface of the annular step 12 is provided with a second annular groove 112.
Specifically, the inner wall of the housing 100 is protruded to the center of the housing 100 to form the annular step 12 so that the first annular groove 111 is provided in the radial direction of the housing 100, while the second annular groove 112 is provided in the axial direction of the housing 100.
As an embodiment, as shown in fig. 5, the flywheel energy storage motor further includes a pressing piece 300, where the pressing piece 300 is disposed on an end surface of the second insulating layer 24 along the axial direction of the stand 100, and the pressing piece 300 is used to press the second insulating layer 24, so that the second insulating layer 24 is encapsulated on the outer surface of the first insulating layer 23.
Specifically, the present embodiment compresses and secures the second insulating layer 24 material to the stator winding 22 by the compression tab 300 to ensure that the insulating material adheres firmly to the wire or coil surface, avoiding loosening or shifting, providing a certain amount of precompression to increase the tightness of the insulating material. In a specific application, curing of the insulating material may be accomplished using an insulating glue, tape, adhesive or mechanical clamp.
As one embodiment, the first insulating layer 23 includes an epoxy resin, and the second insulating layer 24 includes one or more of silicone rubber, silicone potting adhesive, and fluororubber.
In this embodiment, there are some significant advantages to using epoxy to encapsulate the flywheel energy storage motor, mainly including the following: first, the epoxy resin may prevent external environmental factors (such as moisture, corrosive substances, pollutants and dust) from entering the interior of the flywheel energy storage motor. Second, the epoxy resin has good electrical insulation properties, and can effectively prevent current leakage and electrical short circuit. Third, epoxy resins are relatively resistant to chemicals. Fourth, the epoxy resin can provide mechanical protection, reducing the impact of vibration and impact on the flywheel energy storage motor. Fifth, the epoxy resin is easy to process and fill, can adapt to various motor designs, and is suitable for filling and packaging gaps and cracks inside the motor.
In this embodiment, the flywheel energy storage motor encapsulated by silicone rubber, silicone potting adhesive or fluororubber has the same advantages, and the following points are mainly included in the description by taking silicone rubber as an example: first, silicone rubber has excellent high temperature stability, and is capable of operating under extreme temperature conditions without losing its elasticity and physical properties. This makes it suitable for flywheel energy storage motors that need to operate in high temperature environments. Second, silicone rubber has excellent flexibility and elasticity, and can fill irregular gaps and shapes inside the motor in the potting process. This helps to ensure intimate contact and mechanical protection between the components inside the motor. Third, electrical insulation properties: the silicone rubber has good electrical insulation performance, can effectively prevent current leakage, and reduces the risk of electrical short circuit. This is important for protecting the electronics and windings inside the motor. Fourth, chemical and corrosive resistant: silicone rubber is highly resistant to many chemicals and corrosive substances and can protect the interior of the motor from corrosive substances in the external environment. Fifth, good abrasion resistance: silicone rubber generally has good wear resistance, which may provide additional protection in some applications, particularly for motors involving high-speed rotating parts. Sixth, flexibility and ease of processing: the silicone rubber is easy to process and fill, and can adapt to various motor designs and shapes.
In this embodiment, winding insulation in the flywheel energy storage motor is implemented by using an insulation material and an insulation process, including the following steps and methods: (1) insulating material selection: first, an appropriate insulating material is selected, and these materials must have excellent electrical insulation and heat resistance. The commonly used insulation materials include epoxy, insulating paper, insulating tape, polyimide film (polyamide, etc.) insulation layer designs, designs the winding insulation layers, determines the thickness and layered structure of the insulation material, which requires consideration of voltage, temperature, mechanical stress and environmental factors to ensure adequate insulation of the windings (3) winding preparation, cutting the insulation material into the proper shape and then wrapping it around the wires or coils of the windings.
Example two
The flywheel energy storage motor provided in this embodiment is different from the first and second embodiments mainly in the arrangement mode of the grooves, and is specifically shown as follows: the inner wall of the base 100 of the present embodiment is provided with a plurality of grooves (not shown in the drawings), and a side of the second insulating layer 24 facing the base 100 is provided with a plurality of protrusions, and each protrusion is embedded into each groove in a one-to-one correspondence manner. By the arrangement mode, the protrusions are embedded into the grooves to adapt to high and low temperature changes of the motor, the change amount of thermal expansion and contraction of the first insulating layer 23 is absorbed, expansion and contraction of the first insulating layer 23 are buffered, and reliable sealing of insulating materials is guaranteed. The grooves can be regularly arranged or irregularly arranged, the grooves can be round grooves or square grooves, and the number, shape and size of the groove bodies are not particularly limited, so long as the structures that the protrusions are embedded into the grooves can be formed.
In addition to the above-mentioned differences, the flywheel energy storage motor according to the present embodiment may refer to the first embodiment, and will not be described in detail herein.
On the other hand, the embodiment of the application also provides a flywheel energy storage device, which comprises a flywheel energy storage motor.
Specifically, flywheel energy storage devices are an energy storage technology that utilizes a rotating flywheel to convert mechanical energy into electrical energy to achieve energy storage. The flywheel energy storage device consists of a flywheel rotating at high speed, a flywheel energy storage motor connected with the flywheel energy storage device and a control system. When the grid requires additional electrical energy, the mechanical energy stored in the electric machine may be converted into electrical energy and delivered to the grid. Conversely, when the grid produces excess electrical energy, this excess electrical energy may be used to drive the motor, transferring mechanical energy into the flywheel motor for energy storage. The flywheel energy storage device plays an important role in power grid regulation and balance generally, can be used as a peak load balance system of a power grid and used for short-term energy storage and release, and has the characteristics of high response speed, high efficiency, long service life and the like, so that the flywheel energy storage device becomes a renewable energy source integration and power system stability enhancement tool.
The foregoing is merely a preferred embodiment of the present application, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present application, and these modifications and substitutions should also be considered as being within the scope of the present application.
Claims (11)
1. The flywheel energy storage motor is characterized by comprising a machine base and a stator assembly, wherein the stator assembly is arranged in the machine base and comprises a stator core, a stator winding, a first insulating layer and a second insulating layer; the first insulating layer is encapsulated on the outer surfaces of the stator winding and the stator core, and the second insulating layer is encapsulated on the outer surface of the first insulating layer;
the high-low temperature resistance of the second insulating layer material is greater than that of the first insulating layer material, and the toughness of the second insulating layer material is greater than that of the first insulating layer material; the bond strength of the first insulating layer material is greater than the bond strength of the second insulating layer material.
2. The flywheel energy storage motor of claim 1, wherein the first insulating layer covers the stator winding and the outer surface of the stator core, and the first insulating layer fills in the gap between the stator winding and the stator core.
3. The flywheel energy storage motor of claim 2, wherein the first insulating layer has a gap with the housing and the second insulating layer fills the gap between the first insulating layer and the housing.
4. A flywheel energy storage motor as claimed in claim 3, wherein the inner wall of the housing is provided with a plurality of grooves, and the side of the second insulating layer facing the housing is provided with a plurality of protrusions, and each protrusion is embedded in each groove in a one-to-one correspondence.
5. A flywheel energy storage motor as claimed in claim 3, wherein the inner wall of the housing is provided with an annular recess, and the side of the second insulating layer facing the housing is provided with an annular protrusion, and the annular protrusion is embedded in the annular recess.
6. The flywheel energy storage motor of claim 5, wherein the inner wall of the housing is provided with a plurality of annular grooves, a side of the second insulating layer facing the housing is provided with a plurality of annular protrusions, and each annular protrusion is embedded in each annular groove in a one-to-one correspondence.
7. The flywheel energy storage motor of claim 5 or 6, wherein the annular groove comprises a first annular groove and a second annular groove, an opening of the first annular groove being along a radial direction of the housing, an opening of the second annular groove being along an axial direction of the housing;
the annular bulge comprises a first bulge part and a second bulge part, the first bulge part is correspondingly embedded into the first annular groove, and the second bulge part is correspondingly embedded into the second annular groove.
8. The flywheel energy storage motor of claim 7, wherein the inner wall of the housing comprises an annular step, the side of the annular step is provided with the first annular groove, and the end face of the annular step is provided with the second annular groove.
9. The flywheel energy storage motor of claim 1, further comprising a compression sheet disposed on an end surface of the second insulating layer along the axial direction of the housing, the compression sheet being configured to compress the second insulating layer so that the second insulating layer is encapsulated on an outer surface of the first insulating layer.
10. The flywheel energy storage motor of claim 1, wherein the first insulating layer comprises an epoxy resin and the second insulating layer comprises one or more of silicone rubber, silicone potting adhesive, and fluororubber.
11. A flywheel energy storage device comprising a flywheel energy storage motor as claimed in any of claims 1 to 10.
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|---|---|---|---|
| CN202311587900.6A CN117294052B (en) | 2023-11-27 | 2023-11-27 | Flywheel energy storage motor and flywheel energy storage device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311587900.6A CN117294052B (en) | 2023-11-27 | 2023-11-27 | Flywheel energy storage motor and flywheel energy storage device |
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| CN117294052A true CN117294052A (en) | 2023-12-26 |
| CN117294052B CN117294052B (en) | 2024-03-19 |
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|---|---|
| CN117294052B (en) | 2024-03-19 |
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