CN116667585A - Cooling structure of permanent magnet motor - Google Patents
Cooling structure of permanent magnet motor Download PDFInfo
- Publication number
- CN116667585A CN116667585A CN202310440341.XA CN202310440341A CN116667585A CN 116667585 A CN116667585 A CN 116667585A CN 202310440341 A CN202310440341 A CN 202310440341A CN 116667585 A CN116667585 A CN 116667585A
- Authority
- CN
- China
- Prior art keywords
- stator
- rotor
- permanent magnet
- cooling
- air gap
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 35
- 238000004804 winding Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 239000012782 phase change material Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- 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
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating 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
-
- 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)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a cooling structure of a permanent magnet motor, which comprises a stator, a rotor, an air gap, a cooling layer and a cooling layer, wherein the stator main body comprises a base, a stator core, a stator winding, slot wedges and the like; the invention realizes decoupling of the stator and the rotor of the permanent magnet motor, effectively inhibits the temperature rise of the surface of the rotor, can fully utilize the thermal performance of the stator material and the magnetic performance of the magnetic steel, and improves the motor performance.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a cooling structure of a permanent magnet motor.
Background
In general, the electrical losses of a permanent magnet motor are mainly from the stator, the losses generated by the rotor are negligible, but the accumulated losses generate heat, so that the temperatures generated by different parts of the motor on the parts are different due to the difference of loss distribution and cooling layout.
With the rise of the temperature of the stator of the permanent magnet motor, the temperature difference between the stator and the rotor is increased, the heat of the stator radiates heat to the surface of the rotor through an air gap, and in consideration of the difficulty in heat radiation of the surface of the rotor, if no measures are taken to inhibit the heat generated on the inner surface of the stator from radiating to the rotor, or the heat of the air gap is led out, the temperature of the surface of the rotor is greatly increased finally.
The rotor permanent magnet of the permanent magnet motor is mostly a high-energy rare earth permanent magnet such as neodymium iron boron, and the like, and the material is characterized by higher coercive force and remanence, but has the defect of large temperature coefficient of remanence reversibility, namely, the magnetic property is rapidly reduced along with the increase of temperature in the usable temperature range, so that the same output needs larger current to compensate the lost magnetic property.
Therefore, in the design of a permanent magnet motor, the running temperature of the rotor magnetic steel under rated power is often the result of the compromise of magnetic performance and thermal performance, and is also a key for restricting the improvement of the motor performance.
Disclosure of Invention
The invention aims to solve the technical problems and provides a cooling structure of a permanent magnet motor.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a cooling structure of permanent magnet motor, includes stator, rotor and air gap, the stator main part include frame, stator core, stator winding and slot wedge etc. the rotor be permanent magnet rotor structure, still including fixing the cooling layer on the stator, the cooling layer that is located between stator and the rotor is arranged in the iron core notch position or the stator core internal surface that are close to the air gap, the cooling layer by multiunit cooling tube tiling parallelly connected constitution, the cooling tube be copper, copper alloy, aluminium, aluminum alloy or the stainless steel pipe of inside water, oil or phase change material.
In the cooling structure of the permanent magnet motor, the phase change material is diethyl ether.
In the cooling structure of the permanent magnet motor, a rotor of the cooling structure is provided with permanent magnets through an iron core box close to an air gap.
The beneficial effects of the invention are as follows: according to the invention, the cooling layer is arranged between the stator and the rotor, so that heat transfer from the stator to the rotor through the air gap is inhibited, the running environment temperature of the rotor magnetic steel is controlled, the decoupling of the stator and the rotor temperature is realized, the magnetic performance of the rotor magnetic steel of the permanent magnet motor is ensured to be fully utilized, and the thermal performance of the stator material is not constrained by the running temperature of the magnetic steel and is reasonably designed.
Drawings
FIG. 1 is a schematic view of the structure of the present invention in the front view;
fig. 2 is a schematic top view of the present invention.
The reference numerals are as follows: 1-stator, 2-cooling layer, 3-air gap, 4-rotor.
Description of the embodiments
The following description of the embodiments of the invention is presented in conjunction with the drawings and examples to provide a better understanding of the invention to those skilled in the art.
Referring to fig. 1 and 2, the cooling structure of a permanent magnet motor disclosed by the invention comprises a stator 1, a rotor 4 and an air gap 3, wherein a main body of the stator 1 comprises a base, a stator core, a stator winding, a slot wedge and the like, the rotor 4 is of a permanent magnet rotor structure, the rotor 4 is provided with a permanent magnet through an iron core box close to the air gap 3, the cooling structure further comprises a cooling layer 2 fixed on the stator 1, the cooling layer 2 between the stator 1 and the rotor 4 is arranged at a position of a notch of the iron core close to the air gap 3 or on the inner surface of the stator core, namely a section of space of the iron core near the inner surface, and is integrated with the stator 1 after the assembly is completed, and then the cooling layer is assembled with the rotor 4 and other structural members through a tool to form a permanent magnet motor main body.
According to the cooling topology, the cooling layer 2 is arranged on the inner surface of the stator core close to the air gap 3 and fixed on the stator core, so that the decoupling of the temperatures of the stator 1 and the rotor 4 of the permanent magnet motor is realized, the temperature rise of the surface of the rotor 4 is effectively restrained, the material thermal performance of the stator 1 and the magnetic performance of the magnetic steel can be fully utilized, and the motor performance is improved. The motor can be widely applied to the field of permanent magnet motors, and is particularly suitable for medium-low speed motors with large diameters.
The motor cooling structure provided by the invention solves the problem that the temperature of the stator dissipates heat to the rotor through the air gap, effectively inhibits the temperature rise of the surface of the rotor, ensures the running temperature environment of the rotor permanent magnet, fully utilizes the thermal performance of the stator material and the magnetic performance of the magnetic steel, and improves the motor performance.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The utility model provides a permanent magnet motor's cooling structure, includes stator (1), rotor (4) and air gap (3), stator (1) include frame, stator core, stator winding and slot wedge, rotor (4) be permanent magnet rotor structure, its characterized in that: the cooling layer (2) is fixed on the stator (1), the cooling layer (2) between the stator (1) and the rotor (4) is arranged at the position of an iron core notch close to the air gap (3) or the inner surface of the stator iron core, the cooling layer (2) is formed by tiling and connecting a plurality of groups of cooling pipes in parallel, and the cooling pipes are copper, copper alloy, aluminum alloy or stainless steel pipes with water, oil or phase change materials inside.
2. The cooling structure of a permanent magnet machine according to claim 1, wherein the phase change material is diethyl ether.
3. A cooling structure for a permanent magnet machine according to claim 1, characterized in that the rotor (4) is provided with permanent magnets by means of a core box close to the air gap (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310440341.XA CN116667585A (en) | 2023-04-23 | 2023-04-23 | Cooling structure of permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310440341.XA CN116667585A (en) | 2023-04-23 | 2023-04-23 | Cooling structure of permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116667585A true CN116667585A (en) | 2023-08-29 |
Family
ID=87721447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310440341.XA Pending CN116667585A (en) | 2023-04-23 | 2023-04-23 | Cooling structure of permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116667585A (en) |
-
2023
- 2023-04-23 CN CN202310440341.XA patent/CN116667585A/en active Pending
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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 |