CN212412990U - Double-air-gap high-power-density motor adopting direct cooling mode - Google Patents
Double-air-gap high-power-density motor adopting direct cooling mode Download PDFInfo
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- CN212412990U CN212412990U CN202021511910.3U CN202021511910U CN212412990U CN 212412990 U CN212412990 U CN 212412990U CN 202021511910 U CN202021511910 U CN 202021511910U CN 212412990 U CN212412990 U CN 212412990U
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Abstract
The utility model relates to an adopt two air gaps high power density motor of direct cooling mode, including stator assembly, rotor assembly and cooling jacket. The stator assembly comprises a plurality of stator assemblies, and stator assembly gaps are arranged between every two adjacent stator assemblies. The stator assembly includes a stator core and a stator winding. The rotor assembly includes an inner rotor and an outer rotor. The cooling water jacket comprises a water jacket main body and a plurality of water jacket branches. The water jacket main body comprises a water inlet converging pipeline and a water outlet converging pipeline. The water jacket branch comprises a branch shell and a liquid cooling pipeline. One end of the liquid cooling pipeline is connected with the water inlet converging pipeline, and the other end of the liquid cooling pipeline is connected with the water outlet converging pipeline. The water jacket branches and the stator component gaps are arranged in a one-to-one correspondence mode, and the water jacket branches are respectively inserted into the corresponding stator component gaps. The utility model discloses a birotor structure has increased motor output, directly dispels the heat with the contact of motor winding with the cooling jacket simultaneously, has solved the difficult problem of birotor list stator motor cooling.
Description
Technical Field
The utility model relates to the technical field of electric machines, concretely relates to adopt two air gaps high power density motor of direct cooling mode.
Background
As a core part of a new energy automobile, the technical development of a high-power density driving motor is highly emphasized by various countries. With the rapid development of new energy automobile technology, higher requirements are put forward on the weight, the volume, the power density and the reliability of a driving motor.
Most research units at present try to increase the power density of the driving motor as much as possible by increasing the reluctance torque of the motor, increasing the rotating speed of the motor or adopting a liquid cooling mode. The output torque of the motor is positively correlated with the input current, meanwhile, the heat productivity of the winding is positively correlated with the square of the input current, the output of the motor can be increased by increasing the current input, but the heat productivity is also increased dramatically, and the high temperature of the motor causes the high-temperature demagnetization of the permanent magnet to cause the damage of parts in the motor. The traditional motor conducts heat on a winding to a stator iron core and then conducts the heat to a water-cooling shell through the stator iron core, but the heat is blocked due to the fact that thermal resistance between the stator iron core and the water-cooling shell is large and a heat transfer path is long, and high temperature inside the motor is caused. In order to reduce the temperature inside the motor, the input current of the motor must be reduced, which limits the motor output power to a large extent.
Meanwhile, the power density is further improved by the single-stator and single-rotor permanent magnet synchronous motor with the traditional structure. In order to increase the output power and power density of the motor, more and more dual-stator and dual-rotor motors are being developed. At present, the research on a double-rotor motor mainly focuses on researching that a stator has a magnetic yoke type N-N topological structure and an N-S topological structure, inner and outer rotors of the motor with the two structures can work independently, and the double-rotor motor has the advantages of high torque density, compact structure and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an adopt two air gaps high power density motors of direct cooling mode, this motor adopt the structure of birotor, have increased motor output, directly dispel the heat with the contact of motor winding with the cooling jacket simultaneously, have solved the difficult problem of birotor list stator motor cooling.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a double-air-gap high-power-density motor adopting a direct cooling mode comprises a stator assembly, a rotor assembly and a cooling water jacket.
The stator assembly comprises a plurality of stator assemblies which are arranged in sequence, and a stator assembly gap is arranged between every two adjacent stator assemblies; the stator assembly includes a stator core and a stator winding wound on the stator core.
The rotor assembly comprises an inner rotor and an outer rotor; the inner rotor, the stator assembly and the outer rotor are coaxially arranged from inside to outside in sequence.
The cooling water jacket comprises a circular water jacket main body and a plurality of water jacket branches uniformly distributed along the circumference of one side of the water jacket main body; the water jacket main body comprises a water inlet converging pipeline and a water outlet converging pipeline which are sequentially arranged; the water jacket branch comprises a branch shell and a liquid cooling pipeline arranged in the branch shell; one end of the liquid cooling pipeline is connected with the water inlet converging pipeline, and the other end of the liquid cooling pipeline is connected with the water outlet converging pipeline; the water jacket branches and the stator assembly gaps are arranged in a one-to-one correspondence mode, and the water jacket branches are respectively inserted into the corresponding stator assembly gaps.
Further, potting material is filled between the water jacket branch and the stator assemblies on the two sides of the water jacket branch, and the potting material is made of epoxy resin materials.
Further, the inner rotor and the outer rotor are both arranged on the rotor connecting piece; the rotor connecting piece comprises a supporting disc and an output shaft arranged in the middle of the supporting disc; the outer ring of the supporting disk is provided with an outer rotor connecting hole, and the inner ring is provided with an inner rotor connecting hole; and the supporting disk is also provided with a plurality of lightening holes.
Furthermore, a water inlet and a plurality of water inlet ends of the liquid cooling pipelines are arranged on the water inlet converging pipeline; the water outlet converging pipeline is provided with a water outlet and a plurality of liquid cooling pipeline water outlet ends; the equivalent diameter of the water inlet end of the liquid cooling pipeline is equal to that of the water outlet end of the liquid cooling pipeline.
Furthermore, the inner rotor and the outer rotor both comprise a rotor magnetic yoke and magnetic steel embedded on the rotor magnetic yoke.
Furthermore, the cross section of the stator core is trapezoidal, and one end of the stator core is provided with a winding baffle.
Furthermore, the cooling water jacket is made of aluminum alloy materials.
Compared with the prior art, the utility model has the advantages that:
(1) the utility model discloses the water jacket branch in with the cooling jacket directly contacts with stator winding and dispels the heat, and it has the embedment material that has high heat conduction coefficient to fill simultaneously between stator winding and water jacket branch (embedment material adopts the epoxy material), and this area of contact between not only can increase stator winding and the water jacket branch can also play fixed stator core and stator winding's effect. The heat generated by the stator winding is directly transferred to the water jacket branch or transferred to the water jacket branch through the potting material, and then is conveyed out of the motor by the cooling liquid in the cooling water jacket. Compare with current water cooled machine, the utility model discloses shortened the heat transfer path length between motor stator winding and the cooling jacket, effectively reduced the thermal resistance between stator winding and the cooling jacket, improved the radiating efficiency of motor to further improve the moment of torsion density and the power density of motor.
(2) The utility model discloses an inner rotor and external rotor form closed magnetic circuit jointly, can be equivalent to an external rotor motor and an inner rotor motor simultaneous working, and the interior outer rotor is connected through the rotor connecting piece, makes inner rotor and external rotor can carry out power output through same radical axis. The inner rotor and the outer rotor of the utility model adopt an embedded structure, which can effectively increase the salient pole ratio of the motor and improve the weak magnetic capacity and the reluctance torque of the motor; and meanwhile, the magnetic isolation bridge is adopted for conducting magnetism, so that the magnetic flux leakage is reduced.
(3) The utility model discloses the equivalent diameter design with the liquid cooling pipeline section of intaking and play water section is the same value, even the equivalent diameter of liquid cooling pipeline end of intaking equals the equivalent diameter that the liquid cooling pipeline goes out the water end, can guarantee the temperature homogeneity of motor like this.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a longitudinal sectional view of the present invention;
FIG. 3 is a schematic view of an assembly structure of a stator assembly, a cooling water jacket and a potting material;
FIG. 4 is a side view of an assembly structure of a stator assembly, a cooling water jacket and a potting material;
FIG. 5 is a schematic diagram showing the positional relationship of the stator assembly, the cooling water jacket and the potting material;
FIG. 6 is a first schematic structural view of a cooling water jacket;
FIG. 7 is a second structural view of the cooling water jacket (a partial cut-away of the water jacket main body);
FIG. 8 is a first schematic structural view of a rotor coupling;
fig. 9 is a structural schematic diagram of a rotor connector.
Wherein:
1. stator winding, 2, liquid cooling pipeline, 3, stator core, 4, outer rotor magnetic steel, 5, inner rotor magnetic steel, 6, inner rotor, 7, outer rotor, 8, water jacket main body, 9, rotor connecting piece, 10, output shaft, 11, outer rotor connecting hole, 12, encapsulating material, 13, rotor magnetic yoke, 14, magnetism isolating bridge, 15, water inlet, 16, water outlet, 17, water inlet converging pipeline, 18, water outlet converging pipeline, 19, liquid cooling pipeline water inlet end, 20, liquid cooling pipeline water outlet end, 21, water jacket branch, 22, inner rotor connecting hole, 23, winding baffle, 24 and lightening hole.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
the double-air-gap high-power-density motor adopting the direct cooling mode as shown in fig. 1 and 2 comprises a stator assembly, a rotor assembly and a cooling water jacket. The stator assembly comprises a plurality of stator assemblies which are arranged in sequence, and a stator assembly gap is arranged between every two adjacent stator assemblies.
The stator assembly includes a stator core 3 and a stator winding 1 wound on the stator core 3. The cross section of the stator core 3 is trapezoidal, a winding baffle 23 is arranged at one end of the stator core, and the winding baffle 23 plays a limiting role in the stator winding to prevent the stator winding 1 from sliding off the stator core 3. The utility model provides a stator assembly adopts no yoke portion structure, has avoided the stator yoke portion magnetic circuit saturation and the magnetic field coupling problem that conventional birotor motor easily appears.
The rotor assembly comprises an inner rotor 6 and an outer rotor 7. The inner rotor 6, the stator assembly and the outer rotor 7 are coaxially arranged from inside to outside in sequence. The inner rotor 6 and the outer rotor 7 both comprise a rotor yoke 13 and magnetic steel embedded on the rotor yoke 13. And a magnetic isolation bridge 14 is arranged between the magnetic steel and the rotor magnetic yoke. The inner rotor and the outer rotor are both arranged on the rotor connecting piece.
As shown in fig. 6 and 7, the cooling water jacket includes a circular water jacket main body 8 and a plurality of water jacket branches 21 uniformly distributed along the circumference of one side of the water jacket main body 8; the water jacket main body 8 comprises a water inlet converging pipeline 17 and a water outlet converging pipeline 18 which are arranged in sequence; the water jacket branch 21 includes a branch housing and a liquid cooling pipe 2 opened inside the branch housing. One end of the liquid cooling pipeline 2 is connected with a water inlet converging pipeline 17, and the other end of the liquid cooling pipeline is connected with a water outlet converging pipeline 18. The water jacket branches 21 and the stator assembly gaps are arranged in a one-to-one correspondence mode, and the water jacket branches are respectively inserted into the corresponding stator assembly gaps. The water inlet converging pipeline is provided with a water inlet 15 and a plurality of liquid cooling pipeline water inlet ends 19; the water outlet converging pipeline is provided with a water outlet 16 and a plurality of liquid cooling pipeline water outlet ends 20. The equivalent diameter of the inlet end 19 of the liquid cooling pipe is equal to the equivalent diameter of the outlet end 20 of the liquid cooling pipe. The cooling water jacket is made of aluminum alloy materials with high strength, and serves as a frame of the whole motor to support the stator assembly. The cooling liquid enters the water inlet confluence pipeline 17 from the water inlet 15; when flowing in the water inlet converging pipe 17, the cooling liquid respectively enters the liquid cooling pipes 2 in the water jacket branches 21 through the water inlet ends 19 of the liquid cooling pipes, and when the cooling liquid flows in the liquid cooling pipes 2, heat exchange is generated between the cooling liquid and the stator assembly and the encapsulating material 12 which are in contact with the water jacket branches 21; the cooling liquid in the liquid cooling pipes 2 of the water jacket branches 21 finally enters the water outlet converging pipe 18 from the water outlet end 20 of each liquid cooling pipe, and finally is discharged to the outside of the motor from the water outlet 16.
As shown in fig. 3-5, a potting material 12 is filled between the water jacket branch 21 and the stator assembly on both sides thereof, and the potting material is an epoxy resin material. The potting material 12 has a high coefficient of thermal conductivity. The outer wall surface of the water jacket branch 21 is in direct contact with the stator assembly or is in contact with the stator assembly through the potting material 12.
As shown in fig. 8 and 9, the rotor connection member includes a support plate and an output shaft 10 disposed in the middle of the support plate; an outer ring of the supporting plate is provided with an outer rotor connecting hole 11, and an inner ring is provided with an inner rotor connecting hole 22; and a plurality of lightening holes 24 are also formed on the supporting disk. The inner rotor 6 and the outer rotor 7 are coaxial and are connected through a rotor connecting piece 9, so that the thrust of the inner rotor 6 and the thrust of the outer rotor 7 can be output at an output shaft 10. The output shaft 10 serves as an output shaft of the entire motor. The inner rotor magnetic steel 5 and the outer rotor magnetic steel 4 are uniformly embedded into the rotor by adopting a linear embedded structure, the magnetic steels are distributed by adopting an N-S structure, the inner rotor 6 and the outer rotor 7 jointly form a closed magnetic circuit, and magnetic lines of force are emitted by N poles and return to the N poles through an air gap between the inner rotor and the stator, an iron core, the outer rotor, a stator air gap, an outer rotor magnetic yoke, a stator air gap, an iron core and an inner rotor magnetic yoke.
The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (7)
1. The utility model provides an adopt two air gap high power density motors of direct cooling mode which characterized in that: the cooling device comprises a stator assembly, a rotor assembly and a cooling water jacket;
the stator assembly comprises a plurality of stator assemblies which are arranged in sequence, and a stator assembly gap is arranged between every two adjacent stator assemblies; the stator assembly comprises a stator core and a stator winding wound on the stator core;
the rotor assembly comprises an inner rotor and an outer rotor; the inner rotor, the stator assembly and the outer rotor are coaxially arranged from inside to outside in sequence;
the cooling water jacket comprises a circular water jacket main body and a plurality of water jacket branches uniformly distributed along the circumference of one side of the water jacket main body; the water jacket main body comprises a water inlet converging pipeline and a water outlet converging pipeline which are sequentially arranged; the water jacket branch comprises a branch shell and a liquid cooling pipeline arranged in the branch shell; one end of the liquid cooling pipeline is connected with the water inlet converging pipeline, and the other end of the liquid cooling pipeline is connected with the water outlet converging pipeline; the water jacket branches and the stator assembly gaps are arranged in a one-to-one correspondence mode, and the water jacket branches are respectively inserted into the corresponding stator assembly gaps.
2. A dual air gap high power density electric machine with direct cooling as claimed in claim 1 wherein: and potting materials are filled between the water jacket branches and the stator assemblies on the two sides of the water jacket branches, and the potting materials are epoxy resin materials.
3. A dual air gap high power density electric machine with direct cooling as claimed in claim 1 wherein: the inner rotor and the outer rotor are both arranged on the rotor connecting piece; the rotor connecting piece comprises a supporting disc and an output shaft arranged in the middle of the supporting disc; the outer ring of the supporting disk is provided with an outer rotor connecting hole, and the inner ring is provided with an inner rotor connecting hole; and the supporting disk is also provided with a plurality of lightening holes.
4. A dual air gap high power density electric machine with direct cooling as claimed in claim 1 wherein: the water inlet converging pipeline is provided with a water inlet and a plurality of liquid cooling pipeline water inlet ends; the water outlet converging pipeline is provided with a water outlet and a plurality of liquid cooling pipeline water outlet ends; the equivalent diameter of the water inlet end of the liquid cooling pipeline is equal to that of the water outlet end of the liquid cooling pipeline.
5. A dual air gap high power density electric machine with direct cooling as claimed in claim 1 wherein: the inner rotor and the outer rotor both comprise rotor magnetic yokes and magnetic steels embedded and installed on the rotor magnetic yokes.
6. A dual air gap high power density electric machine with direct cooling as claimed in claim 1 wherein: the cross section of the stator core is trapezoidal, and one end of the stator core is provided with a winding baffle.
7. A dual air gap high power density electric machine with direct cooling as claimed in claim 1 wherein: the cooling water jacket is made of aluminum alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021511910.3U CN212412990U (en) | 2020-07-28 | 2020-07-28 | Double-air-gap high-power-density motor adopting direct cooling mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021511910.3U CN212412990U (en) | 2020-07-28 | 2020-07-28 | Double-air-gap high-power-density motor adopting direct cooling mode |
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| CN212412990U true CN212412990U (en) | 2021-01-26 |
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| CN202021511910.3U Active CN212412990U (en) | 2020-07-28 | 2020-07-28 | Double-air-gap high-power-density motor adopting direct cooling mode |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953149A (en) * | 2021-02-24 | 2021-06-11 | 同济大学 | Radial magnetic flux birotor motor |
| CN112953051A (en) * | 2021-03-10 | 2021-06-11 | 中国人民解放军海军工程大学 | High-efficiency water-cooled motor stator |
| CN114640220A (en) * | 2022-03-17 | 2022-06-17 | 安徽中安绿能股份有限公司 | Stator assembly and motor with same |
-
2020
- 2020-07-28 CN CN202021511910.3U patent/CN212412990U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953149A (en) * | 2021-02-24 | 2021-06-11 | 同济大学 | Radial magnetic flux birotor motor |
| CN112953149B (en) * | 2021-02-24 | 2022-09-20 | 同济大学 | Radial magnetic flux birotor motor |
| CN112953051A (en) * | 2021-03-10 | 2021-06-11 | 中国人民解放军海军工程大学 | High-efficiency water-cooled motor stator |
| CN114640220A (en) * | 2022-03-17 | 2022-06-17 | 安徽中安绿能股份有限公司 | Stator assembly and motor with same |
| CN114640220B (en) * | 2022-03-17 | 2022-08-12 | 安徽中安绿能股份有限公司 | Stator assembly and motor with same |
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