CN116760210A - Cooling structure for reducing temperature rise of compound excitation motor with staggered magnetic poles - Google Patents
Cooling structure for reducing temperature rise of compound excitation motor with staggered magnetic poles Download PDFInfo
- Publication number
- CN116760210A CN116760210A CN202310738307.0A CN202310738307A CN116760210A CN 116760210 A CN116760210 A CN 116760210A CN 202310738307 A CN202310738307 A CN 202310738307A CN 116760210 A CN116760210 A CN 116760210A
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- China
- Prior art keywords
- cooling water
- water channel
- stators
- sections
- stator
- 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
- 230000005284 excitation Effects 0.000 title claims abstract description 46
- 238000001816 cooling Methods 0.000 title claims abstract description 24
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 22
- 150000001875 compounds Chemical class 0.000 title claims description 16
- 239000000498 cooling water Substances 0.000 claims abstract description 64
- 238000004804 winding Methods 0.000 claims abstract description 40
- 102000010637 Aquaporins Human genes 0.000 claims description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 3
- 101000927062 Haematobia irritans exigua Aquaporin Proteins 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
Classifications
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to a cooling structure for reducing the temperature rise of a composite excitation motor with staggered magnetic poles, which comprises a cooling water channel, two sections of stators and a direct-current excitation winding, wherein the direct-current excitation winding is wound in the lower concave part of the cooling water channel of the disconnection part of the two sections of stators along the circumferential direction; and the direct contact between the cooling water channel and the two sections of stators and the direct current excitation winding is realized. According to the invention, the exciting winding is arranged on the cooling water pipe, so that the direct contact between the cooling water pipe and the stator and between the cooling water pipe and the exciting winding are realized, the contact thermal resistance between the cooling water and the stator and between the cooling water pipe and the exciting winding are reduced, the cooling effect is better, the heat dissipation efficiency is higher, and the cooling water pipe is arranged at the junction of the yoke part of the stator and the magnetic-conducting back yoke, is far away from an alternating magnetic field, and has less influence on the performance of a motor even if a metal material is adopted.
Description
Technical Field
The invention relates to a compound excitation motor with staggered magnetic poles, in particular to a water cooling structure of a compound excitation motor with staggered magnetic poles.
Background
Compared with the traditional electric excitation motor and permanent magnet motor, the composite excitation motor has the advantages of higher efficiency and adjustable air-gap magnetic field, but because the composite excitation motor adjusts the air-gap magnetic field by magnetizing the ferromagnetic poles through the direct-current auxiliary excitation winding, the composite excitation motor needs one more set of direct-current windings besides the alternating-current windings, and the temperature rise is also very important to be reduced.
In the existing composite excitation motor cooling structure, a water cooling machine seat is additionally arranged outside a stator back yoke in a traditional water cooling mode, heat generated by an excitation winding and a stator core is conducted into the water cooling structure through a stator magnetic conduction back yoke and is taken away by cooling water, and the heat transfer path between the cooling water and the direct current excitation winding as well as between the cooling water and the stator is longer, the thermal resistance is larger, and the efficiency is lower; or the stator core is axially provided with holes, the water cooling pipe is arranged in the holes, the stator core is required to be processed by the structure, and the motor performance can be influenced if the cooling pipe is made of a metal material with higher heat conductivity.
In order to solve the problem of low heat dissipation efficiency of an alternating current main winding and an auxiliary excitation winding in a compound excitation motor and effectively reduce temperature rise of a motor stator and a direct current auxiliary excitation winding, a novel cooling structure needs to be designed.
Disclosure of Invention
The invention provides a cooling structure for reducing the temperature rise of a compound excitation motor with staggered magnetic poles, which aims at solving the problem that the direct current excitation winding of the existing compound excitation motor is difficult to cool.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the cooling structure for reducing the temperature rise of the staggered magnetic pole composite excitation motor comprises a cooling water channel, two sections of stators and a direct current excitation winding, wherein the direct current excitation winding is wound in the lower concave part of the cooling water channel of the disconnection part of the two sections of stators along the circumferential direction; the direct contact between the cooling water channel and the two sections of stators and the direct current excitation winding is realized, and the direct current excitation winding is used for reducing the contact thermal resistance between cooling water and the direct current excitation winding and between the two sections of stators.
Further, the two-section stator comprises a stator core and an armature winding, and is made of laminated silicon steel sheets and embedded copper wire windings.
Further, the two sections of stators are disconnected at the middle position, and the conjugate part of the two sections of stators is provided with a cooling water channel groove.
Further, the cooling water channel is inserted from the outer side of the two sections of stators and is fixed with the cooling water channel through the cooling water channel groove of the yoke part of the two sections of stators.
Further, the cooling water channel outer circle shrink fit stator magnetic conduction back yoke plays an axial magnetic conduction role.
Further, the cooling water channel comprises circular water channels, water collecting rings at two ends, water inlet and outlet pipes and water channels with concave disconnection positions of the stators at two ends, wherein the number of the circular water channels is the same as that of the circular arc grooves of the two sections of stator cores.
Further, the cooling water channel is a spiral water channel or a circular water channel.
The beneficial effects of the invention are as follows:
according to the invention, the exciting winding is arranged on the cooling water pipe, so that the direct contact between the cooling water pipe and the stator and between the cooling water pipe and the exciting winding are realized, the contact thermal resistance between the cooling water and the stator and between the cooling water pipe and the exciting winding are reduced, the cooling effect is better, the heat dissipation efficiency is higher, and the cooling water pipe is arranged at the junction of the yoke part of the stator and the magnetic-conducting back yoke, is far away from an alternating magnetic field, and has less influence on the performance of a motor even if a metal material is adopted.
Drawings
FIG. 1 is a diagram of a motor stator, water channel and DC field winding installation;
FIG. 2 is a diagram showing the stator, cooling water channel and stator magnetic back yoke installation;
FIG. 3 is a front view of a cooling water channel;
FIG. 4 is a side view of a cooling water channel;
FIG. 5 is a schematic diagram of the overall flow of a cooling water channel;
FIG. 6 is a schematic axial flow diagram of a cooling water channel;
in the figure: 1 is a cooling water channel; 2 is a direct current excitation winding; 3 is a segmented stator one; 4 is a segmented stator II; and 5 is a stator magnetic conduction back yoke.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in fig. 1 to 6, the cooling structure for reducing the temperature rise of the compound excitation motor with staggered magnetic poles comprises a cooling water channel 1, two sections of stators, a direct current excitation winding 2 and the like. The middle positions of the two sections of stators are completely disconnected to form a first section stator 3 and a second section stator 4, and a sufficient number of stator yoke cooling water channel grooves are arranged on the outer circle of the two sections of stator cores. The first segmented stator 3 and the second segmented stator 4 both comprise stator cores and armature windings, and the two stators are laminated through silicon steel sheets and are made of embedded copper wire windings. The cooling water channel 1 comprises round water channels with the same number as the circular arc grooves of the stator core, water collecting rings at two ends, water inlet and outlet pipes and water channels with concave stator disconnection positions. The cooling water channel 1 is inserted from the outer sides of the two sections of stators, and the two sections of stators are ensured to be completely fixed through the cooling water channel grooves of the yokes of the stators; the direct-current excitation winding 2 is wound on a stator breaking part, namely a cooling water channel concave part along the circumferential direction; the stator magnetic-conducting back yoke 5 is sleeved on the outer circle of the cooling water channel 1 in a hot mode, and plays a role in axial magnetic conduction.
Preferably, the first sectional stator 3, the second sectional stator 4, the direct current auxiliary exciting winding 2 and the stator magnetic conductive back yoke 5 can be optimally designed by a motor optimal design method so as to achieve the best rated working efficiency, the proper voltage regulation range and the minimum volume weight.
Preferably, the cooling water channel 1 selects a proper water channel form, such as a spiral water channel, a circular water channel and the like, according to the working temperature and the processing manufacturability of the motor, and the specific dimension parameters of the cooling water channel can optimize the heat dissipation effect of the motor through the optimal design so as to ensure that the motor works in a safe temperature range.
According to the novel cooling structure, the cooling water channels are fixed, the yoke parts of the first sectional stator 3 and the second sectional stator 4 are provided with the cooling water channel grooves, the middle positions of the first sectional stator 3 and the second sectional stator 4 are completely disconnected, two sections of stators are respectively arranged, the cooling water channels are sunken in the disconnected parts of the stators, the first sectional stator 3 and the second sectional stator 4 are inserted into the cooling water channel 1 from the outer sides of the two axial ends, and the cooling water channels are fixed with the cooling water channels through the cooling water channel grooves of the yoke parts of the stators. The direct current excitation winding 2 is wound around the stator breaking part, i.e., the cooling water channel recess, in the circumferential direction. When the compound excitation motor operates, current is introduced into the direct current auxiliary excitation winding to adjust an air gap field, so that loss is generated, loss is also generated in the stator, and generated heat is taken away by cooling water flowing in a cooling water pipe in direct contact, as shown in fig. 5 and 6.
Claims (7)
1. A cooling structure for reducing temperature rise of compound excitation motor of crisscross magnetic pole, its characterized in that: the direct-current excitation winding is wound in the concave part of the cooling water channel of the disconnection part of the two sections of stators along the circumferential direction; the direct contact between the cooling water channel and the two sections of stators and the direct current excitation winding is realized, and the direct current excitation winding is used for reducing the contact thermal resistance between cooling water and the direct current excitation winding and between the two sections of stators.
2. The cooling structure for reducing temperature rise of a compound excitation motor with interleaved poles according to claim 1 wherein: the two-section stator comprises a stator core and an armature winding, and is made of laminated silicon steel sheets and copper wire embedded windings.
3. The cooling structure for reducing temperature rise of a compound excitation motor with interleaved poles according to claim 1 wherein: the two sections of stators are disconnected at the middle position, and the conjugate part of the two sections of stators is provided with a cooling water channel groove.
4. The cooling structure for reducing temperature rise of a compound excitation motor with interleaved poles according to claim 1 wherein: the cooling water channel is inserted from the outer sides of the two sections of stators and is fixed with the cooling water channel through the cooling water channel grooves of the yokes of the two sections of stators.
5. The cooling structure for reducing temperature rise of a compound excitation motor with interleaved poles according to claim 1 wherein: the cooling water channel outer circle shrink fit stator magnetic conduction back yoke plays an axial magnetic conduction role.
6. The cooling structure for reducing temperature rise of a compound excitation motor with interleaved poles according to claim 1 wherein: the cooling water channel comprises circular water channels, water collecting rings at two ends, water inlet and outlet pipes and water channels with concave breaking positions of the stators at two ends, wherein the number of the circular water channels is the same as that of the circular arc grooves of the two sections of stator cores.
7. The cooling structure for reducing temperature rise of a compound excitation motor with interleaved poles according to claim 1 wherein: the cooling water channel is a spiral water channel or a circular water channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310738307.0A CN116760210A (en) | 2023-06-20 | 2023-06-20 | Cooling structure for reducing temperature rise of compound excitation motor with staggered magnetic poles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310738307.0A CN116760210A (en) | 2023-06-20 | 2023-06-20 | Cooling structure for reducing temperature rise of compound excitation motor with staggered magnetic poles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116760210A true CN116760210A (en) | 2023-09-15 |
Family
ID=87958608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310738307.0A Pending CN116760210A (en) | 2023-06-20 | 2023-06-20 | Cooling structure for reducing temperature rise of compound excitation motor with staggered magnetic poles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116760210A (en) |
-
2023
- 2023-06-20 CN CN202310738307.0A patent/CN116760210A/en active Pending
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