CN110971062A - High-heat-dissipation shell for high-density permanent magnet synchronous motor - Google Patents
High-heat-dissipation shell for high-density permanent magnet synchronous motor Download PDFInfo
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- CN110971062A CN110971062A CN201911274290.8A CN201911274290A CN110971062A CN 110971062 A CN110971062 A CN 110971062A CN 201911274290 A CN201911274290 A CN 201911274290A CN 110971062 A CN110971062 A CN 110971062A
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- cooling water
- rear end
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- end cover
- main shell
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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
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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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
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a high heat dissipation shell for a high-density permanent magnet synchronous motor, which comprises a rear end cover and a main shell, wherein the rear end cover is arranged on the outer wall of the rear end of the main shell, a rear round cover is arranged on the inner circumferential wall of the rear end cover, the rear round cover and the rear end cover are welded and connected through a welding edge, a screw hole a is arranged in the outer circumferential wall of the rear end cover, a junction box is arranged on the outer circumferential wall of the upper end of the main shell, a cooling water inlet is arranged on the main shell on the front side of the junction box, a cooling water outlet is arranged on the outer circumferential wall of the lower end of the main shell close to the rear side, a base is arranged on the outer circumferential wall of the main shell, cooling water is rapidly injected into a vertical channel and a transverse channel through the pressure of a pump, the cooling water continuously flows back and forth in the vertical channel, therefore, the motor achieves high heat dissipation and the use performance of the motor is improved.
Description
Technical Field
The invention belongs to the technical field related to mechanical equipment, and particularly relates to a high-heat-dissipation shell for a high-density permanent magnet synchronous motor.
Background
The motor is an electromagnetic device for realizing electric energy conversion or transmission according to the electromagnetic induction law, the motor is represented by a letter M (old standard is represented by D) in a circuit, the motor mainly has the function of generating driving torque and is used as a power source of electrical appliances or various machines, the generator is represented by a letter G in the circuit and mainly has the function of converting mechanical energy into electric energy, the permanent magnet synchronous motor is a synchronous motor which is excited by permanent magnets to generate synchronous rotating magnetic fields, the permanent magnets are used as rotors to generate rotating magnetic fields, three-phase stator windings react through armatures under the action of the rotating magnetic fields to induce three-phase symmetrical currents, at the moment, the kinetic energy of the rotors is converted into electric energy, the permanent magnet synchronous motor is used as a generator, in addition, when three-phase symmetrical currents are introduced to the sides of the stators, the three-phase stator currents have 120 phase difference in, the permanent magnet synchronous motor is used as a motor, the motor shell is mainly used for protecting the motor from the environmental influences of rainwater, corrosion, rusting and the like, the service life of the motor can be longer due to the protection of the motor shell, the motor can operate under proper conditions, and a cooling system is further provided for the motor according to the type of the motor shell.
Publication number 208571849U's patent document discloses a permanent magnet synchronous motor, and it includes stator, rotor, wind wheel, upper end cover, bottom end cover and casing, its characterized in that, permanent magnet synchronous motor still includes: the fan cover is arranged on the outer side of the lower end cover and forms an accommodating space with the lower end cover in an enclosing mode, and the accommodating space is communicated with the interior of the shell; the air ducts are respectively arranged on the outer side of the shell and communicated with the accommodating space; the shell is provided with a first through hole for communicating the interior of the shell with the air duct; the wind wheel is arranged in the accommodating space; through the technical scheme of the utility model, the heat generated in the permanent magnet synchronous motor can be timely dissipated, thereby avoiding demagnetization of the permanent magnet in the rotor caused by gradual temperature rise in the permanent magnet synchronous motor and further avoiding motor damage; promote PMSM's performance from this, improve the holistic radiating efficiency of PMSM, ensure PMSM safe operation, but current motor housing technique has following problem: current motor heat dissipation mode has through seting up spiral helicine water conservancy diversion passageway in motor housing, through water, oil, media such as air conditioning reduce the temperature of motor during operation, help motor heat dissipation, but such motor heat dissipation mode heat radiating area is not comprehensive, and more single, if spiral pipeline stops up appears, just can't dispel the heat, cause the inside effectual heat dissipation that can't carry out of motor housing easily like this, thereby cause its motor housing internal temperature to rise, influence the work efficiency of motor, still can make the motor shut down, unable operation and work.
Disclosure of Invention
The invention aims to provide a high-heat-dissipation shell for a high-density permanent magnet synchronous motor, and aims to solve the problems that the heat dissipation area of the motor is not comprehensive and the heat dissipation cannot be performed when the existing spiral pipeline in the motor shell is blocked in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a high heat dissipation shell for a high-density permanent magnet synchronous motor comprises a rear end cover and a main shell body, wherein the rear end cover is installed on the outer wall of the rear end of the main shell body, a rear round cover is arranged on the inner wall of the circumference of the rear end cover, the rear round cover and the rear end cover are welded together through a welding edge, a screw hole a is formed in the outer wall of the circumference of the rear end cover, a junction box is arranged on the outer wall of the circumference of the upper end of the main shell body, a cooling water inlet is formed in the main shell body on the front side of the junction box, a cooling water outlet is formed in the outer wall of the circumference of the lower end of the rear side of the main shell body, a base is arranged on the outer wall of the circumference of the main shell body, an installation shell is arranged on the outer wall of the rear, the inside of the main casing body is provided with horizontal passageway, the inside of the main casing body still is provided with perpendicular passageway, be provided with the mounting panel on the main casing body front side circumference outer wall, be provided with screw d on the mounting panel.
Preferably, the diameter of the installation shell is smaller than that of the main shell, the installation shell is arranged inside the circumference of the rear end cover, the installation shell and the rear end cover are tightly attached together, and the outer wall of the rear end cover is arc-shaped.
Preferably, the inside water-cooling passageway that is provided with of rear end cap equally, the water-cooling passageway is provided with a week around the rear end cap, the water-cooling tube outside is through water-cooling tube and cooling water export, cooling water inlet connection, water-cooling tube intermediate position department is provided with the connector.
Preferably, the vertical channel is circular, the transverse channel is linear, and the vertical cross-sectional area of the vertical channel is the same as the transverse cross-sectional area of the transverse channel.
Preferably, the diameter of cooling water inlet is the same with the diameter of cooling water outlet, the cooling water inlet sets up on erecting passageway upper end circumference outer wall bottommost, the cooling water outlet sets up on erecting passageway lower extreme circumference outer wall topmost, the cooling water inlet sets up on the main casing body leans on the front side outer wall, the cooling water outlet sets up on the main casing body leans on rear side lower extreme outer wall.
Preferably, the vertical channel and the horizontal channel are mutually crossed, and the vertical channel and the horizontal channel are kept in a mutually perpendicular state.
Preferably, the vertical channel and the transverse channel are close to the circumferential inner wall of the main shell, the sealing performance is kept between the cooling water inlet and the cooling water pipe, and the sealing performance is kept between the cooling water outlet and the cooling water pipe.
Compared with the prior art of motor shells, the invention provides a high-heat-dissipation shell for a high-density permanent magnet synchronous motor, which has the following beneficial effects:
the invention increases the vertical channel and the horizontal channel in the main shell, thus when the cooling water is injected into the main shell, the contact area of the cooling water and the main shell can be increased, thereby achieving the maximization of the heat absorption and temperature reduction of the cooling water, although the design of the motor is continuously improved, the motor always generates heat due to energy loss and low energy efficiency, in most cases, the heat dissipation can be realized through conductive cooling, in the method, the heat is conducted to the main shell of the machine from the motor through the installation interface, and then the heat is absorbed and taken away by the cooling water, while the general main shell of the motor is only provided with the spiral cooling channel, only the heat dissipation can be realized through the channel, and the rapid and comprehensive heat dissipation is difficult to achieve, and the novel main shell of the motor is provided with a plurality of vertical channels and horizontal channels, and the vertical channels and the horizontal channels are mutually crossed, so that the cooling water flows downwards in the vertical channels, the cooling water moves to the rear side in the transverse channel, the cooling water flows into the cooling water inlet from the cooling water pipe, the cooling water can be continuously injected into the cooling water inlet by the action of the pump, the cooling water can quickly enter the vertical channel and the transverse channel, the cooling water continuously flows into the vertical channel from the transverse channel in the moving process to the rear side, the vertical channel then flows downwards into the transverse channel on the lower side, finally the cooling water in all the vertical channels and the transverse channels uniformly flows into the cooling water outlet and flows out from the cooling water pipe connected with the cooling water outlet, the blockage in the vertical channels and the transverse channels is not needed to be worried, a plurality of vertical channels and transverse channels can flow, the cooling water flows to the rear side through the plurality of transverse channels, the flow area of the cooling water on the main shell is enlarged, and the pressure of the pump can be passed, the cooling water is rapidly injected into the vertical channel and the transverse channel, so that the cooling water continuously flows back and forth in the vertical channel and the transverse channel, the contact area is increased, the maintenance condition can be reduced, the heat of the motor is dissipated through a cooling water heat absorption cooling mode, the motor achieves high heat dissipation, and the use performance of the motor is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:
fig. 1 is a schematic perspective view of a high heat dissipation casing for a high density permanent magnet synchronous motor according to the present invention;
fig. 2 is a schematic perspective view of a motor casing according to the present invention;
FIG. 3 is a schematic side view of a motor casing according to the present invention;
FIG. 4 is a schematic view of a front structure of a motor casing according to the present invention;
in the figure: 1. a rear end cap; 2. a rear dome; 3. welding edges; 4. a screw hole a; 5. a cooling water outlet; 6. a main housing; 7. a machine base; 8. a junction box; 9. a cooling water inlet; 10. mounting a shell; 11. a front end cover; 12. an engine shaft hole; 13. a screw hole b; 14. a screw hole c; 15. a transverse channel; 16. a vertical channel; 17. mounting a plate; 18. and a screw hole d.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a high heat dissipation shell for a high-density permanent magnet synchronous motor comprises a rear end cover 1 and a main shell 6, wherein the rear end cover 1 is installed on the outer wall of the rear end of the main shell 6, a rear round cover 2 is arranged on the inner circumferential wall of the rear end cover 1, the rear round cover 2 and the rear end cover 1 are welded through a welding edge 3, a water cooling channel is also arranged inside the rear end cover 1, the water cooling channel surrounds the rear end cover 1 for a circle, the outside of the water cooling tube is connected with a cooling water outlet 5 and a cooling water inlet 9 through a water cooling tube, a connector is arranged at the middle position of the water cooling tube, a screw hole a4 is arranged inside the outer circumferential wall of the rear end cover 1, a junction box 8 is arranged on the outer circumferential wall of the upper end of the main shell 1, a cooling water inlet 9 is arranged on the main shell 6 in front of the junction box 8, the diameter, the uppermost end of a cooling water outlet 5 is arranged on the circumferential outer wall at the lower end of a vertical channel 16, a cooling water inlet 9 is arranged on the outer wall at the front side of a main shell 6, the cooling water outlet 5 is arranged on the outer wall at the lower end of the main shell 6 at the rear side, so that cooling water can enter from the cooling water inlet 9, the cooling water can rapidly enter the vertical channel 16 and a transverse channel 15 under the action of a pump, finally, the cooling water in all the vertical channels 16 and the transverse channels 15 uniformly flows into the cooling water outlet 5 and then flows out through a cooling water pipe connected with the cooling water outlet 5, the circumferential outer wall at the lower end of the main shell 6 at the rear side is provided with the cooling water outlet 5, the circumferential outer wall of the main shell 6 is provided with a machine base 7, the outer wall at the rear end of the main shell 6 is provided with a mounting shell 10, a screw hole c14 is arranged in the circumferential outer wall of the mounting shell 10, the front, the front end cover 11 is internally provided with a motor shaft hole 12, the main shell 6 is internally provided with a transverse channel 15, the main shell 6 is internally provided with a vertical channel 16, the front side of the main shell 6 is circumferentially provided with an installation plate 17, and the installation plate 17 is provided with a screw hole d 18.
A high heat dissipation shell for a high-density permanent magnet synchronous motor comprises a rear end cover 1 and a main shell body 6, the diameter of an installation shell 10 is smaller than that of the main shell body 6, the installation shell 10 is arranged inside the circumference of the rear end cover 1, the installation shell 10 is tightly attached to the rear end cover 1, the outer wall of the rear end cover 1 is arc-shaped, so that the rear end cover 1 can be installed on the outer wall of the rear end of the main shell body 6 through the installation shell 10 to protect the inside of the main shell body 6, dust and other impurities are prevented from entering the inside of the main shell body 6 from the rear end of the main shell body 6 to cause damage to components such as a rotor and the like, the temperature can be effectively reduced, a vertical channel 16 is circular, a transverse channel 15 is linear, the vertical cross-sectional area of the vertical channel 16 is the same as the transverse cross-sectional area of the transverse channel, thereby achieving the effect of high heat dissipation, and the cooling water can rapidly enter the vertical channel 16 and the horizontal channel 15 through the action of the pump, the cooling water continuously flows from the horizontal channel 15 to the vertical channel 16 in the process of moving from the horizontal channel 15 to the rear side, and flows to the rear side through the plurality of horizontal channels 15, so that the flow area of the cooling water passing through the main shell 6 is enlarged, the purpose of high heat dissipation can be rapidly achieved through the action of the cooling water inside the vertical channel 16 and the horizontal channel 15, the vertical channel 16 and the horizontal channel 15 are mutually crossed, the vertical channel 16 and the horizontal channel 15 are kept in a mutually vertical state, so that the cooling water can simultaneously enter the plurality of vertical channels 16 and the horizontal channels 15, and the blockage condition in the vertical channel 16 and the horizontal channel 15 is not necessary to worry, the plurality of vertical channels 16 and the horizontal channels 15 can flow, thereby the effect of heat absorption and temperature reduction can be synchronously performed, the circumference inner wall of main casing body 6 is pressed close to vertical passageway 16 and cross passageway 15, keep the leakproofness between cooling water inlet 9 and the condenser tube, keep the leakproofness between condenser tube 5 and the condenser tube, make the better temperature to main casing body 6 inside of cooling water of vertical passageway 16 and cross passageway 15 absorb like this, can reach rapid cooling's effect like this, and keep very good sealed between cooling water inlet 9 and condenser tube with cooling water outlet 5, prevent like this that the cooling water from flowing into on the main casing body 6, cause the situation such as destruction, corruption to main casing body 6, cause the motor can not normal use.
The working principle and the using process of the invention are as follows: after the invention is installed, when the heat radiation shell of the motor is installed, firstly the installation shell 10 is installed in the rear end cover 1, the rotating shaft and other components such as the rotor and the like in the main shell 6 can be installed, then the connecting wire is installed in the junction box 8, then the rear end cover 1 is sleeved on the installation shell 10 on the main shell 6, the screw hole a4 is aligned with the screw hole c14, the rear end cover 1 is installed in the screw hole a4 and the screw hole c14 through nuts, then the front end cover 11 is placed on the outer wall of the front end of the installation plate 17, the rotating shaft passes through the motor shaft hole 12, the screw hole b13 is aligned with the screw hole d18, then the front end cover 11 is fixed through the nuts, then the cooling water can be connected to the cooling water inlet 9 and the cooling water outlet 5, the permanent magnet synchronous motor is firstly composed of the components such as the rotor, the end cover, the stator and the like, the biggest characteristic of the motor is that the structure of the stator is very similar to the structure of, the starting process of the motor can be regarded as comprising an asynchronous starting stage and a pull-in synchronous stage, in the research stage of the asynchronous starting, the rotating speed of the motor is gradually increased from zero, the above-mentioned primary reason is that in a series of factors such as asynchronous torque, permanent magnet generation braking torque, reluctance torque caused by torque and single-axis rotation caused by asymmetry of rotor magnetic circuit, in the process, the rotation speed is increased in a vibration manner, in the starting process, the quality torque is obtained, only the asynchronous torque is the driving motor or is the torque, other torques are mainly caused by the braking property, when the speed of the motor is increased from zero to the magnetic field rotation speed close to the stator, under the influence of the permanent magnet pulse vibration torque, the rotation speed of the permanent magnet synchronous motor can exceed the synchronous rotation speed, and the overshoot phenomenon of the rotation speed is presented, but after the rotation speed vibration for a period of time, the permanent magnet synchronous motor is pulled into synchronization under the effect of the synchronous torque, a large amount of heat is generated in the starting and working processes, and the heat in the main shell 6 is conducted on the inner wall of the main shell 6, then cooling water can be injected into the cooling water inlet 9 through the water cooling pipe by the action of a pump, the cooling water flows downwards in the vertical channel 16, the cooling water moves towards the rear side in the transverse channel 15, the cooling water flows into the cooling water inlet 9 from the cooling water pipe, the cooling water can be rapidly injected into the vertical channel 16 and the transverse channel 15 by the action of the pump, the cooling water continuously flows into the vertical channel 16 from the transverse channel 15 and continuously flows into the transverse channel 15 from the vertical channel 16 in the process of moving towards the rear side, so that the temperature on the main shell 6 is absorbed in the process of continuously and repeatedly flowing, the temperature of the cooling water is low, the stable absorption on the main shell 6 is facilitated, the temperature of the cooling water is raised, the effect of balancing is achieved, and the rapid heat dissipation can be rapidly performed on the main shell 6, the vertical channels 16 flow downwards into the transverse channels 15 on the lower side, finally, cooling water in all the vertical channels 16 and the transverse channels 15 uniformly flows into the cooling water outlets 5 and flows out through cooling water pipes connected with the cooling water outlets 5, so that the situation that the vertical channels 16 and the transverse channels 15 are blocked is not needed to be worried about, a plurality of vertical channels 16 and a plurality of transverse channels 15 can flow, and the cooling water flows to the rear side through the plurality of transverse channels 15, so that the flow area of the cooling water passing through the main shell 6 is enlarged, and the motor can radiate heat better.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a high heat dissipation casing for high density PMSM, includes rear end cap (1) and main casing body (6), its characterized in that: the rear end cover (1) is arranged on the outer wall of the rear end of the main shell (6), the rear end circular cover (2) is arranged on the inner wall of the circumference of the rear end cover (1), the rear circular cover (2) and the rear end cover (1) are connected by welding through a welding edge (3), a screw hole a (4) is arranged inside the outer wall of the circumference of the rear end cover (1), a junction box (8) is arranged on the outer wall of the circumference of the upper end of the main shell (1), a cooling water inlet (9) is arranged on the main shell (6) at the front side of the junction box (8), a cooling water outlet (5) is arranged on the outer wall of the circumference of the lower end of the rear side of the main shell (6), a machine base (7) is arranged on the outer wall of the circumference of the main shell (6), an installation shell (10) is arranged on the outer wall of the rear end of the main shell (10), be provided with screw b (13) on front end housing (11), the inside of front end housing (11) sets up organic shaft hole (12), the inside of main casing body (6) is provided with cross passageway (15), the inside of main casing body (6) still is provided with perpendicular passageway (16), be provided with mounting panel (17) on main casing body (6) front side circumference outer wall, be provided with screw d (18) on mounting panel (17).
2. The high heat dissipation casing for the high-density permanent magnet synchronous motor according to claim 1, wherein: the diameter of the installation shell (10) is smaller than that of the main shell (6), the installation shell (10) is arranged inside the circumference of the rear end cover (1), the installation shell (10) and the rear end cover (1) are tightly attached together, and the outer wall of the rear end cover (1) is arc-shaped.
3. The high heat dissipation casing for the high-density permanent magnet synchronous motor according to claim 1, wherein: the rear end cover is characterized in that a water cooling channel is also arranged inside the rear end cover (1), the water cooling channel is provided with a circle around the rear end cover (1), the outside of the water cooling pipe is connected with a cooling water outlet (5) and a cooling water inlet (9) through the water cooling pipe, and a connector is arranged in the middle of the water cooling pipe.
4. The high heat dissipation casing for the high-density permanent magnet synchronous motor according to claim 1, wherein: the vertical channel (16) is circular, the transverse channel (15) is linear, and the vertical cross-sectional area of the vertical channel (16) is the same as the transverse cross-sectional area of the transverse channel (15).
5. The high heat dissipation casing for the high-density permanent magnet synchronous motor according to claim 1, wherein: the diameter of cooling water inlet (9) is the same with the diameter of cooling water outlet (5), cooling water inlet (9) sets up on erecting passageway (16) upper end circumference outer wall bottom, cooling water outlet (5) top sets up on erecting passageway (16) lower extreme circumference outer wall, cooling water inlet (9) set up on main casing body (6) leans on the front side outer wall, cooling water outlet (5) set up on main casing body (6) leans on rear side lower extreme outer wall.
6. The high heat dissipation casing for the high-density permanent magnet synchronous motor according to claim 1, wherein: the vertical channel (16) and the transverse channel (15) are mutually crossed, and the vertical channel (16) and the transverse channel (15) are kept in a mutually perpendicular state.
7. The high heat dissipation casing for the high-density permanent magnet synchronous motor according to claim 1, wherein: the vertical channel (16) and the transverse channel (15) are close to the circumferential inner wall of the main shell (6), the sealing performance is kept between the cooling water inlet (9) and the cooling water pipe, and the sealing performance is kept between the cooling water outlet (5) and the cooling water pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911274290.8A CN110971062A (en) | 2019-12-12 | 2019-12-12 | High-heat-dissipation shell for high-density permanent magnet synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911274290.8A CN110971062A (en) | 2019-12-12 | 2019-12-12 | High-heat-dissipation shell for high-density permanent magnet synchronous motor |
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| CN110971062A true CN110971062A (en) | 2020-04-07 |
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| CN201911274290.8A Pending CN110971062A (en) | 2019-12-12 | 2019-12-12 | High-heat-dissipation shell for high-density permanent magnet synchronous motor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203859601U (en) * | 2014-05-17 | 2014-10-01 | 浙江格美机电科技有限公司 | High-airtightness stainless steel motor with high resistance to weather |
| CN105071617A (en) * | 2015-09-08 | 2015-11-18 | 浙江双菱新能源科技有限公司 | Integrated type permanent magnet synchronous motor shell |
| CN205017145U (en) * | 2015-10-21 | 2016-02-03 | 中国石化集团胜利石油管理局胜大电力设备厂 | Self -cooled permanent -magnet machine |
| CN208015508U (en) * | 2018-04-26 | 2018-10-26 | 荣成市华宇电机有限公司 | A kind of water cooling machine casing of motor |
-
2019
- 2019-12-12 CN CN201911274290.8A patent/CN110971062A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203859601U (en) * | 2014-05-17 | 2014-10-01 | 浙江格美机电科技有限公司 | High-airtightness stainless steel motor with high resistance to weather |
| CN105071617A (en) * | 2015-09-08 | 2015-11-18 | 浙江双菱新能源科技有限公司 | Integrated type permanent magnet synchronous motor shell |
| CN205017145U (en) * | 2015-10-21 | 2016-02-03 | 中国石化集团胜利石油管理局胜大电力设备厂 | Self -cooled permanent -magnet machine |
| CN208015508U (en) * | 2018-04-26 | 2018-10-26 | 荣成市华宇电机有限公司 | A kind of water cooling machine casing of motor |
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Application publication date: 20200407 |
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