CN116094199A - Multiplexing type modularized permanent magnet wind driven generator stator structure - Google Patents
Multiplexing type modularized permanent magnet wind driven generator stator structure Download PDFInfo
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- CN116094199A CN116094199A CN202310371582.3A CN202310371582A CN116094199A CN 116094199 A CN116094199 A CN 116094199A CN 202310371582 A CN202310371582 A CN 202310371582A CN 116094199 A CN116094199 A CN 116094199A
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- 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
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- 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
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
- H02K11/014—Shields associated with stationary parts, e.g. stator cores
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/225—Heat pipes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/227—Heat sinks
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention relates to the field of permanent magnet wind power generators, and particularly discloses a multiplexing modularized permanent magnet wind power generator stator structure, which comprises a stator core unit, wherein stator grooves are formed in the stator core unit along the circumferential direction, stator teeth are formed between adjacent stator grooves, and first gravity type micro heat pipe arrays with working mediums capable of naturally reflowing under the action of gravity are arranged on two sides of the stator core unit; and/or the bottom of the stator teeth is provided with a groove, and a second gravity type micro heat pipe array in which working mediums can naturally flow back under the action of gravity is arranged in the groove. The invention has the advantages of simple structure, low cost, high-efficiency heat dissipation of the wind driven generator, work efficiency improvement, operation reliability improvement and the like.
Description
Technical Field
The invention relates to the field of permanent magnet wind generators, in particular to a multiplexing type modularized permanent magnet wind generator stator structure.
Background
When China is in front of the transformation upgrading and innovative development of the production industry, the energy structure is in a significant adjustment stage of transformation to clean energy, and wind power generation is used as a main project of clean energy power generation, and plays a vital role in promoting the transformation of the energy structure of China, ensuring energy safety, relieving ecological and environmental crisis and the like. Due to the development of high-energy permanent magnet materials and power electronics technology, permanent magnet motors also exhibit great competitive advantages in the fields of wind power equipment and the like by virtue of the advantages of high power density, high efficiency and strong fault tolerance.
With the increasing demand of the wind power generation field for the power level of the motor, the further large-scale of the wind power generator has become an important development direction of wind power technology, and the problems of manufacturing, installing and maintaining the huge fan have become key problems in the technical development of the field. The stator of the permanent magnet wind driven generator is designed in a segmented mode to solve the problems of manufacturing, installation and the like, and the high-power motor is split into a multi-module combined structure, so that the stator is quite suitable for the field of wind power generation. However, in the conventional multi-module combined structure, there is no isolation between stator modules, and the modules are seriously coupled, so that faults are easily spread from a single fault point to the whole motor. In addition, the modularized motor often adopts a fractional slot centralized winding stator structure, and a large number of subharmonic magnetic fields exist in the motor air gap, so that the harmonic loss of the motor can be increased, the problems of vibration noise, torque pulsation and the like are aggravated, and the steady-state performance of the motor is adversely affected.
Meanwhile, the high-power wind driven generator has the characteristics of high temperature rise and large volume, the traditional wind driven generator generally adopts a forced air cooling radiating mode, but the air heat capacity as a heat transfer medium is low, the thermal response speed is low, a large amount of heat cannot be consumed, and the requirement of increasingly developing cannot be met; and the air convection heat exchange coefficient is small, the heat exchange efficiency is low, and the heat radiation structure needs to be designed with a larger heat exchange area, so that the system is huge. Therefore, the traditional cooling mode cannot simultaneously consider the structural characteristics, the cooling requirements and the economy of the high-power wind driven generator.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a multiplexing type modularized permanent magnet wind power generator stator structure which has the advantages of simple structure and low cost, can realize efficient heat dissipation of a wind power generator, and improves the working efficiency and the operation reliability.
In order to solve the technical problems, the invention adopts the following technical scheme:
the stator structure of the multiplexing modularized permanent magnet wind driven generator comprises a stator core unit, wherein stator grooves are formed in the stator core unit along the circumferential direction, stator teeth are formed between adjacent stator grooves, and first gravity type micro heat pipe arrays with working mediums capable of naturally reflowing under the action of gravity are arranged on two sides of the stator core unit;
and/or the bottom of the stator teeth is provided with a groove, and a second gravity type micro heat pipe array in which working mediums can naturally flow back under the action of gravity is arranged in the groove.
As a further improvement of the above technical scheme: the evaporation section of the first gravity type micro heat pipe array is bonded with the stator core unit through heat conducting glue, and the evaporation section of the second gravity type micro heat pipe array is bonded with the groove through heat conducting glue.
As a further improvement of the above technical scheme: and the condensation sections of the first gravity type micro heat pipe array and the second gravity type micro heat pipe array are bent towards the outer side of the stator core unit.
As a further improvement of the above technical scheme: the first gravity type micro heat pipe array and the second gravity type micro heat pipe array are of L-shaped structures, each side of the stator core unit is provided with two oppositely arranged first gravity type micro heat pipe arrays, and each groove is internally provided with two oppositely arranged second gravity type micro heat pipe arrays.
As a further improvement of the above technical scheme: the first gravity type micro heat pipe array and the second gravity type micro heat pipe array are of flat plate structures and comprise a plurality of layers of laminated sheets, and the surfaces of the sheets are immersed with insulating paint.
As a further improvement of the above technical scheme: the first gravity type micro heat pipe array and the second gravity type micro heat pipe array are internally provided with a plurality of channels which are connected in parallel, and the channels are filled with gas-liquid phase change working media.
As a further improvement of the above technical scheme: and the side wall of the channel is provided with a micron-sized multi-bulge structure.
As a further improvement of the above technical scheme: and the condensation sections of the first gravity type micro heat pipe array and the second gravity type micro heat pipe array are provided with porous radiating fins.
As a further improvement of the above technical scheme: and the condensation sections of the first gravity type micro heat pipe array and the second gravity type micro heat pipe array are adhered to the porous radiating fins through heat conducting glue.
As a further improvement of the above technical scheme: the porous radiating fins are zigzag, foam or lattice.
Compared with the prior art, the invention has the advantages that:
1) Good heat dissipation: the gravity type micro heat pipe array has good heat conducting performance, apparent heat conductivity up to 200000W/(m.K), far higher than common metal materials and than core type heat pipes, and good temperature uniformity and thermal response speed. The gravity type micro heat pipe array is arranged on the stator yoke part and the stator teeth, has large contact area with a heat source, is beneficial to high-efficiency conduction of heat, and can conduct heat generated by the stator core and the armature winding along the axial direction. The porous structure of the radiating fins greatly increases the specific surface area, and is beneficial to efficient heat radiation.
2) Multiplexing function: aiming at the field of permanent magnet wind driven generators, a first gravity type micro heat pipe array is additionally arranged between adjacent stator core units to form a shielding magnetic barrier, so that the magnetic field coupling between each module unit is reduced. The second gravity type micro heat pipe array is arranged at the tooth part of the stator, so that leakage magnetic flux closed along the tooth top of the stator can be weakened, the effective magnetic flux entering the stator is improved, and the performance of the motor is further improved; the arrangement of the heat pipe structure can change the air gap flux distribution, increase the repetition period of the cogging torque and reduce the amplitude of the cogging torque. The structural parameters of the gravity type micro heat pipe array are changed pertinently, the amplitude of the air gap flux guide harmonic wave can be changed, and the adjustment of the amplitude of the air gap flux density harmonic wave is realized, so that the radial magnetic tension of a motor with fixed order is weakened.
3) The safety is high: the gravity type micro heat pipe array of the multi-channel structure is high in stability and difficult to cause faults such as blockage and the like. Each channel in the array can realize independent operation, and single-channel faults have little influence on the overall heat conducting performance. The material cost is lower, the heat pipe can be flexibly selected according to the motor structure and the heat dissipation requirement, and the popularization is convenient.
4) The influence on a motor system is small: the stator structure can realize efficient heat dissipation of a stator heat source without adding an additional device, and the efficiency of the whole wind power generation system can be effectively improved. The multi-lamination type heat pipe structure and lamination insulating paint can block the axial flow path of vortex, and the influence of the structure on the motor performance is avoided.
Drawings
Fig. 1 is a schematic perspective view of a stator structure of a multiplexing type modularized permanent magnet wind power generator.
Fig. 2 is a schematic diagram of a front view structure of a stator structure of the multiplexing type modular permanent magnet wind driven generator.
FIG. 3 is a schematic diagram of a gravity type micro heat pipe array according to the present invention, wherein (a) is a first gravity type micro heat pipe array and (b) is a second gravity type micro heat pipe array.
Fig. 4 is a scanning electron microscope image of a micrometer-scale multi-bump structure in the present invention, wherein (a) is three cylindrical micrometer-scale multi-bump structures and (b) is four semi-cylindrical micrometer-scale multi-bump structures.
FIG. 5 is a schematic diagram of a modular permanent magnet wind generator stator tooth flux leakage distribution.
FIG. 6 is a schematic diagram of stator tooth magnetic flux leakage before and after placement of a micro heat pipe array.
FIG. 7 is a schematic diagram of air gap permeabilities before and after placement of a micro-heat pipe array.
The reference numerals in the drawings denote: 1. a stator core unit; 11. a stator groove; 12. stator teeth; 2. a first gravity type micro heat pipe array; 3. a second gravity type micro heat pipe array; 4. porous heat dissipation fins.
Detailed Description
As used in this section and in the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. The use of the terms "first," "second," and the like in this section does not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The invention is described in further detail below with reference to the drawings and specific examples of the specification.
Fig. 1 to 3 show an embodiment of a multiplexing-type modularized permanent magnet wind power generator stator structure according to the present invention, which includes a modularized stator core unit 1, a first gravity type micro heat pipe array 2, a second gravity type micro heat pipe array 3, and a porous heat dissipation fin 4.
The modularized stator core is provided with stator slots 11 uniformly along the circumferential direction, and stator teeth 12 are formed between adjacent stator slots 11. An armature winding (not shown) is arranged in the stator slots 11, and in this embodiment, the armature winding is a true fractional slot concentrated winding, and the number of slots per pole per phase is:
to ensure symmetry of the windings of the motor, the number of slots allocated per phase should be equal,
is an integer. In the above, Z and Z 0 The number of the stator total slots and the number of the single stator module total slots are respectively, m is the number of motor phases, p is the number of motor pole pairs, and t is the number of stator modules.
The stator module comprises a plurality of sub-modules, the windings of each sub-module are arranged identically and the windings of each phase are distributed symmetrically, the number of slots of each sub-module is nZ 0 . A first gravity type micro heat pipe array 2 is arranged between two adjacent sub-modules (specifically between the stator core units 1). The bottom of the stator tooth 12 of each sub-module is provided with x grooves, the grooves are internally provided with a second gravity type micro heat pipe array 3, the lengths of the grooves are consistent with the lengths of the stator cores, and the heights are h respectively 1 、h 2 …h x The widths are b respectively 1 、b 2 …b x 。
The gravity type micro heat pipe array is of a flat plate structure, and the pipe is formed by laminating metal sheets with good heat conductivity. Preferably, the pipe is made of a material with low conductivity, and the surface is subjected to insulating varnish dipping process treatment and lamination after molding. Since the heat pipe is installed deep into the motor, the alternating magnetic field in the core causes eddy currents on the metal surface, resulting in loss on the heat pipe. The axial flow path of the vortex can be blocked by the multi-lamination structure and the surface paint dipping process, the self loss of the heat pipe is greatly reduced, and the adverse effect on the motor performance is avoided.
The heat pipe is internally provided with a plurality of channels, adjacent channels are divided by the pipe wall to form a parallel channel array, and the channels are filled with gas-liquid phase change working medium with low boiling point. The number of the internal channels of the micro heat pipe array can be tens, preferably, the pipe wall can be provided with a micron-sized multi-bulge structure, so that the internal surface area is increased, and the heat transfer performance of the heat pipe is further improved.
The evaporation section of the gravity type micro heat pipe array is arranged inside the stator core, the connection mode between the evaporation section and the stator core is preferably heat conduction silica gel adhesion, and the condensation section is stuck with porous heat dissipation fins so as to realize efficient heat dissipation.
The first gravity type micro heat pipe array 2 is placed at two sides of the stator core unit 1. Preferably, the first gravity type micro heat pipe array 2 is designed into an L-shaped structure, and the length of an evaporation section is 1/2 of the axial length of the stator core; the height is slightly larger than the height of the yoke part of the stator core, and the lengths of the heat transfer section and the condensing section are selected according to the size of the shell structure and the whole structure of the motor.
The second gravity type micro heat pipe array 3 is placed in the groove at the bottom of the stator teeth 12. Preferably, the second gravity type micro heat pipe array 3 is also designed into an L-shaped structure, the size of the second gravity type micro heat pipe array is different from that of the first gravity type micro heat pipe array 2, and the length of an evaporation section is 1/2 of the axial length of a stator core; the height and width correspond to the height and width of the grooves at the bottom of the stator teeth 12, respectively, and the lengths of the heat transfer section and the condensing section are selected according to the size of the casing structure and the overall structure of the motor.
In order to ensure that the phase change working medium in the heat pipe can naturally flow back under the gravity factor, the condensation section of the heat pipe is bent upwards along the vertical direction, and an included angle alpha is formed between the heat transfer section and the condensation section and is more than 90 degrees and less than 180 degrees.
The porous radiating fins 4 are arranged on the outer side of the condensing section of the heat pipe, and the connecting mode between the porous radiating fins and the condensing section of the heat pipe is heat conduction silica gel adhesion. The porous heat dissipation fins 4 are made of metal.
The porous heat dissipation fins 4 can be in a zigzag shape, a foam shape, a lattice shape or the like, and can be specifically determined according to practical situations. The porous structure of the fin has high porosity, so that the specific surface area of the fin is greatly increased, and the heat exchange efficiency can be greatly improved in a limited volume. The porous structure can form a complicated and tortuous air flow channel, strengthen turbulence disturbance degree of air in the channel, break and recombine a flow boundary layer and a thermal boundary layer, and further strengthen convection heat exchange coefficient of the integral structure.
The working principle of the invention is as follows:
1) During operation of the motor, the current in the armature and the alternating magnetic field in the motor cause joule loss and core loss on the windings and core, respectively, and the loss will be expressed in the form of heat, thereby causing heat accumulation and temperature rise inside the motor.
The evaporating section of the heat pipe is arranged at the bottom of the stator teeth 12, is well contacted with the stator core, is made of metal, has good heat conduction performance, and can efficiently transfer heat generated on the core and the winding to the evaporating section of the gravity type micro heat pipe array. The initial state of the working medium in the evaporation section channel is liquid, and the liquid working medium is quickly gasified under the influence of temperature rise, absorbs and stores a large amount of latent heat, and simultaneously diffuses to the condensation section through the heat transfer section. After the gaseous working medium reaches the condensing section, phase change condensation liquefaction occurs, stored heat is released under the high-efficiency convection heat exchange effect of the porous radiating fins 4, and naturally flows back under the action of gravity, and returns to the evaporating section again through the heat transfer section. The process is circulated for a plurality of times, and the absorption and release of the latent heat are realized by means of the mutual conversion between the vapor-liquid two-phase flow, so that the heat of a key heat source inside the motor is emitted to the outside of the motor.
2) The structural features of the modular permanent magnet wind generator result in a rotor field that directly enters the other pole through the adjacent stator teeth 12 without passing through the main magnetic circuit of the motor stator yoke, resulting in a larger leakage flux, as shown in fig. 5 below.
According to the principle of magnetic reluctance minima, the magnetic flux always closes along the path of least reluctance. The gravity type micro heat pipe array is arranged on the magnetic leakage path at the bottom of the stator teeth 12, so that the magnetic resistance of the magnetic leakage path can be increased, the magnetic leakage path can be effectively shielded, the effective magnetic flux of the main magnetic path can be improved, and the performance of the motor can be improved, as shown in fig. 6, wherein (a) is a schematic diagram of the magnetic leakage of the stator teeth before the micro heat pipe array is arranged, and (b) is a schematic diagram of the magnetic leakage of the stator teeth after the micro heat pipe array is arranged.
3) After the gravity type micro heat pipe array heat dissipation structure is added to the bottom of the stator teeth 12, the air gap flux distribution is changed as shown in fig. 7, where (a) is a schematic diagram of air gap flux before placing the micro heat pipe array, and (b) is a schematic diagram of air gap flux after placing the micro heat pipe array.
Relative air gap flux guide function
The square of (2) can be expressed as:
wherein, the liquid crystal display device comprises a liquid crystal display device,
DC component amplitude squared as air gap flux guide, < >>
The amplitude of the harmonic component, which is the square of the air gap flux guide.
According to the calculation method of the cogging torque of the permanent magnet motor, the following steps are adopted:
wherein, the liquid crystal display device comprises a liquid crystal display device,
is a spatially distributed function of the remanence of the permanent magnet.
By additionally arranging the gravity type micro heat pipe array on the stator teeth, the distribution condition of the air gap flux guide of the motor is changed, and the amplitude of the main harmonic wave of the flux guide function is reduced
. The fundamental wave period of the cogging torque is increased while the heat of the motor is dissipated, so that the total cogging torque amplitude is reduced, and the torque pulsation and vibration noise of the motor are further reduced.
3) The resultant magnetic field density in the motor air gap is:
According to maxwell Wei Dinglv, the tension applied to a unit area in the motor rotor is:
During design, a finite element method is adopted to analyze the motor mode, the key order radial magnetic tension (such as the magnetic tension forming resonance with a stator structure) with the greatest influence degree on motor vibration noise is determined, and the corresponding air gap flux guide harmonic wave causing the key magnetic tension is extracted. On the basis, the saturation degree of the stator teeth and the actual heat conduction effect are comprehensively considered, the structural size parameters of the gravity type micro heat pipe array are designed pertinently, and the amplitude of the radial magnetic tension density of the key order is reduced by adjusting the distribution condition of the air gap flux guide harmonic wave, so that the vibration noise condition of the motor is weakened.
While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a multiplexing type modular permanent magnet wind power generator stator structure, includes stator core unit (1), stator core unit (1) has seted up stator groove (11) along the circumferencial direction, adjacent form stator tooth (12) between stator groove (11), its characterized in that: the two sides of the stator core unit (1) are provided with a first gravity type micro heat pipe array (2) with working mediums capable of naturally reflowing under the action of gravity;
and/or the bottom of the stator teeth (12) is provided with a groove, and a second gravity type micro heat pipe array (3) with working medium capable of naturally reflowing under the action of gravity is arranged in the groove.
2. The multiplexing modular permanent magnet wind generator stator structure of claim 1, wherein: the evaporation section of the first gravity type micro heat pipe array (2) is bonded with the stator core unit (1) through heat conducting glue, and the evaporation section of the second gravity type micro heat pipe array (3) is bonded with the groove through heat conducting glue.
3. The multiplexing modular permanent magnet wind generator stator structure of claim 2, wherein: the condensation sections of the first gravity type micro heat pipe array (2) and the second gravity type micro heat pipe array (3) are bent towards the outer side of the stator core unit (1).
4. A multiplexed modular permanent magnet wind generator stator structure as claimed in claim 3, wherein: the first gravity type micro heat pipe array (2) and the second gravity type micro heat pipe array (3) are of L-shaped structures, each side of the stator core unit (1) is provided with two oppositely arranged first gravity type micro heat pipe arrays (2), and each groove is internally provided with two oppositely arranged second gravity type micro heat pipe arrays (3).
5. The multiplexing modular permanent magnet wind generator stator structure of claim 1, wherein: the first gravity type micro heat pipe array (2) and the second gravity type micro heat pipe array (3) are of flat plate structures and comprise a plurality of layers of laminated sheets, and the surfaces of the sheets are immersed with insulating paint.
6. The multiplexing modular permanent magnet wind generator stator structure of claim 1, wherein: the first gravity type micro heat pipe array (2) and the second gravity type micro heat pipe array (3) are internally provided with a plurality of channels which are connected in parallel, and the channels are filled with gas-liquid phase change working media.
7. The multiplexing-type modular permanent magnet wind generator stator structure according to claim 6, wherein: and the side wall of the channel is provided with a micron-sized multi-bulge structure.
8. The multiplexing modular permanent magnet wind generator stator structure according to any one of claims 1 to 7, wherein: the condensation sections of the first gravity type micro heat pipe array (2) and the second gravity type micro heat pipe array (3) are provided with porous radiating fins (4).
9. The multiplexing-type modular permanent magnet wind generator stator structure according to claim 8, wherein: the condensation sections of the first gravity type micro heat pipe array (2) and the second gravity type micro heat pipe array (3) are adhered to the porous radiating fins (4) through heat conducting glue.
10. The multiplexing-type modular permanent magnet wind generator stator structure according to claim 8, wherein: the porous radiating fins (4) are zigzag, foam or lattice.
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