CN115208133B - Linear motor and method for manufacturing the same - Google Patents
Linear motor and method for manufacturing the same Download PDFInfo
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- CN115208133B CN115208133B CN202211021407.3A CN202211021407A CN115208133B CN 115208133 B CN115208133 B CN 115208133B CN 202211021407 A CN202211021407 A CN 202211021407A CN 115208133 B CN115208133 B CN 115208133B
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- heat
- cooling liquid
- winding modules
- motor
- heat conducting
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
-
- 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
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a linear motor and a manufacturing method thereof. An installation space is formed in the motor shell, and a cooling channel for circulating cooling liquid is formed on the shell wall of the motor shell; the plurality of winding modules are arranged in the installation space, and gaps are formed between adjacent winding modules; the heat conducting piece is arranged in a gap between the winding modules, at least part of the surface of the heat conducting piece is attached to the motor casing, and at least part of the surface of the heat conducting piece is attached to the winding modules. The linear motor can conduct heat efficiently to the winding module inside the linear motor and cool the winding module, and can effectively solve the heating problem of the high-thrust linear motor.
Description
Technical Field
The present invention relates to a motor cooling technology, and more particularly, to a linear motor and a method for manufacturing the same.
Background
At present, the linear motor is widely applied to industrial machinery, and is used as a direct-drive mode, and the linear motor does not have an intermediate transmission mechanism, so that the linear motor has higher speed, acceleration and dynamic response. Because the linear motor can generate larger heat in the working process, the heat seriously affects the motor performance such as the improvement of the motor thrust, in particular to a high-power linear motor, so that the problem of heat dissipation of the motor is solved, and the prior art still needs to be improved and developed.
The linear motor motion has the heating problem, and the heat mainly comes from motor (primary), and the minor part comes from magnetic plate (secondary), and the heat of motor mainly comes from copper loss and core loss, and the copper loss mainly is the thermal effect of wire winding module, and the core loss comes from hysteresis loss and the eddy current loss of iron core. Many conventional linear motor winding modules cannot be cooled, particularly the inside of the winding module is not cooled, or some of the winding modules are filled and cooled by resin, but the heat conduction efficiency of the resin is poor, particularly after the resin is cooled and solidified, bubbles and the like exist in the inside of the winding module, and the cooling effect is general.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a linear motor and a manufacturing method thereof, which can conduct heat efficiently to a winding module inside the linear motor and cool the winding module, and can effectively solve the heating problem of a high-thrust linear motor.
In order to achieve the above object, an embodiment of the present invention provides a linear motor, which includes a motor housing, a winding module and a heat conducting member. An installation space is formed in the motor shell, and a cooling channel for circulating cooling liquid is formed on the shell wall of the motor shell; the plurality of winding modules are arranged in the installation space, and gaps are formed between adjacent winding modules; the heat conducting piece is arranged in a gap between the winding modules, at least part of the surface of the heat conducting piece is attached to the motor casing, and at least part of the surface of the heat conducting piece is attached to the winding modules.
In one or more embodiments of the present invention, the heat conducting member includes a flexible heat conducting sheet and a flexible medium, the flexible medium has a certain thickness, the thickness is greater than or equal to a gap size between any adjacent winding modules, and the flexible heat conducting sheet is disposed to cover a surface of the flexible medium.
In one or more embodiments of the present invention, the heat conducting member is S-shaped and penetrates into gaps between the winding modules, and the head end, the tail end and the middle part area of the heat conducting member are respectively attached to the inner wall of the motor housing.
In one or more embodiments of the invention, the flexible thermally conductive sheet comprises a graphite thermally conductive film and the flexible medium comprises foam or soft thermally conductive silicone.
In one or more embodiments of the present invention, the motor housing includes a bottom plate and side plates surrounding the bottom plate; a first cooling liquid outlet and a first cooling liquid inlet are formed on the bottom plate, and a first cooling channel which is communicated with the first cooling liquid outlet and the first cooling liquid inlet is formed in the bottom plate; the side plate is provided with a second cooling liquid outlet and a second cooling liquid inlet, and a second cooling channel which is communicated with the second cooling liquid outlet and the second cooling liquid inlet is formed in the side plate.
In one or more embodiments of the present invention, the first cooling channel is disposed in an S-shaped detour; the second cooling channel is arranged in a U shape or an S shape.
In one or more embodiments of the present invention, the linear motor further includes a cover plate that is provided on the motor housing and covers the installation space.
In one or more embodiments of the present invention, the cover plate surface is formed with a heat conductive part filling the remaining space in the installation space.
In one or more embodiments of the present invention, the cover plate and the heat conductive portion are integrally cured and formed of a filler having good heat conductive properties.
In one or more embodiments of the invention, the filler comprises an epoxy resin.
In one or more embodiments of the present invention, the winding module includes an iron core, an enameled wire, an insulating framework and an insulating heat-conducting cloth, the iron core includes a plurality of stacked silicon steel sheets, the insulating framework is sleeved on the iron core, the enameled wire is wound on the insulating framework to form a coil, the insulating heat-conducting cloth is wrapped on the surface of the coil, and a partial area of the surface of the heat-conducting member is attached to the insulating heat-conducting cloth.
In one or more embodiments of the present invention, the silicon steel sheet is in a T-shaped arrangement, the enameled wire is a copper enameled wire, the copper enameled wire is wound on the insulating framework for a plurality of turns to form a coil with a flat external surface, and the insulating heat-conducting cloth completely covers the external surface of the coil.
In one or more embodiments of the present invention, a uniform gap is formed between adjacent winding modules, and the gaps between the winding modules are all the same in size.
The embodiment of the invention also provides a manufacturing method of the linear motor, which comprises the following steps:
providing a motor shell and forming a cooling channel on the motor shell;
installing a plurality of winding modules in the motor shell, and forming gaps between adjacent winding modules;
filling the heat conducting piece in gaps among the winding modules, and attaching part of the area of the surface of the heat conducting piece to the motor shell;
potting filler is applied to the motor housing and cured.
Compared with the prior art, the linear motor provided by the embodiment of the invention has the advantages that the heat of the winding modules can be led out through the heat conducting piece and the cooling liquid injected into the motor shell through the motor shell and the heat conducting piece arranged among the winding modules, so that the temperature of the motor is greatly reduced, and the service life and the performance of the motor are improved.
Drawings
Fig. 1 is a schematic perspective view of a linear motor according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating an internal structure of a linear motor according to an embodiment of the present invention;
fig. 3 is a motor housing structure diagram of a linear motor according to an embodiment of the present invention;
FIG. 4 is a transverse cross-sectional view of a base plate in a motor housing of a linear motor according to an embodiment of the present invention;
FIG. 5 is a block diagram of a winding module of a linear motor according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a winding module of a linear motor according to an embodiment of the present invention;
fig. 7 is a structural view of an iron core in a winding module of a linear motor according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a linear motor according to an embodiment of the present invention with a winding module mounted in a motor housing;
fig. 9 is a longitudinal sectional view of a linear motor according to an embodiment of the present invention;
FIG. 10 is a transverse cross-sectional view of a linear motor according to an embodiment of the present invention;
fig. 11 is a structural view of a heat conductive member of a linear motor according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As described in the background art, linear motors are increasingly used in industrial machines because of their fast speed, acceleration and dynamic response, but they also have a heating problem, and the heat generated by the winding module cannot be effectively transferred and discharged, which seriously affects the motor performance.
In order to solve the technical problem, the invention provides the linear motor, which can conduct heat efficiently to the winding module inside the linear motor and then cool the winding module through the motor shell capable of circulating cooling liquid and the heat conducting piece, so that the heating problem of the high-thrust linear motor can be effectively solved.
As shown in fig. 1 to 2, an embodiment of the present invention provides a linear motor, which includes a motor housing 10, a cover 20, a winding module 30, and a heat conducting member 40. A mounting space 11 is formed in the motor housing 10. The winding module 30 and the heat conducting member 40 are disposed in the installation space 11, and the heat conducting member 40 is respectively attached to the winding module 30 and the motor housing 10, so as to guide the heat generated by the winding module 30 onto the motor housing 10 and discharge the heat outwards. The cover 20 is disposed on the motor housing 10 and covers the installation space 11, and the cover 20 can also assist the heat-conducting member 40 to conduct heat-conducting cooling of the winding module 30.
As shown in fig. 3, the motor housing 10 includes a bottom plate 12 and side plates 13 provided around the bottom plate 12. The side plates 13 and the bottom plate 12 enclose an installation space 11. A cooling passage through which a cooling liquid circulates is formed in a housing wall of the motor housing 10. In order to facilitate the processing, the bottom plate of the motor housing 10 is detachably connected with the side plate, and the side plate is detachably connected with the side plate, and in order to prevent the loss of the cooling liquid, the bottom plate is connected with the side plate, and the side plate is connected with the side plate, and the edge of the cooling channel is also provided with an annular sealing gasket.
As shown in fig. 4, a first cooling liquid outlet 121 and a first cooling liquid inlet 122 are formed on the bottom plate 12, a first cooling channel 123 communicating the first cooling liquid outlet 121 and the first cooling liquid inlet 122 is formed inside the bottom plate 12, and the first cooling channel is preferably arranged in an S-shaped detour, and cooling liquid flows into the bottom plate 12 from the first cooling liquid inlet 122, so that S-shaped circulation can be performed inside the bottom plate 12, so that the cooling liquid can pass through the bottom plate 12 in a larger area, and then be discharged from the first cooling liquid outlet 121.
In one embodiment, a plurality of transverse flow channels and a plurality of longitudinal flow channels may be machined into the base plate 12. The transverse flow channel and the longitudinal flow channel are provided with a plurality of interval plugs, so that only one completely oriented flow channel from the first cooling liquid inlet 122 to the first cooling liquid outlet 121 is ensured, backflow and mixed flow are avoided, and heat is favorably conducted out through cooling liquid smoothly.
The side plates 13 are also provided with cooling channels, and the cooling channels between the adjacent side plates 13 are communicated, and the cooling channels of the four side plates are communicated to form a second cooling channel 131, as shown in fig. 10. In a specific embodiment, a plurality of transverse channels may be machined on the side plate 13, and when the side plate 13 is assembled on the bottom plate 12, the transverse channels inside the side plate are mutually communicated, one end of a part of the transverse channels is blocked by a plug, so that the plurality of transverse channels form a circulation loop with an inlet 132 and an outlet 133, such as a U-shaped loop or an S-shaped loop, for cooling liquid to circulate.
In other embodiments, the second cooling channels 131 on the side plate 13 may also be in communication with the first cooling channels 123 on the bottom plate 12, and only a set of cooling fluid inlets and outlets is left, so as to facilitate the installation of the cooling pipes by the customer.
As shown in fig. 5 to 7, the winding module 30 includes an iron core 31, enamel wire 32, insulation skeleton 33, and insulation heat-conducting cloth 34. The iron core 31 is a whole body formed by stacking a plurality of thin silicon steel sheets 311, and each silicon steel sheet 311 is arranged in an inverted T shape. The insulating skeleton 33 is sleeved on the iron core 31, the enameled wire 32 is wound on the insulating skeleton 33 to form a coil, and the insulating heat conducting cloth 34 is wrapped on the surface of the coil. The enameled wire 32 is preferably a copper enameled wire, the insulating framework 33 is preferably a plastic insulating framework, the copper enameled wire is wound on the plastic insulating framework for a plurality of circles to form a coil with a flat appearance surface, and the appearance surface of the copper enameled wire is further wrapped with an insulating heat-conducting cloth 34 to cover the copper enameled wire completely, so that a complete winding module 30 is formed.
As shown in fig. 8, a plurality of winding modules 30 are arranged in the installation space 11, the iron core 31 is fixed on the bottom plate 12 and is locked and fixed with the bottom plate 12, uniform gaps 35 are formed between adjacent winding modules 30, and the gaps 35 between the winding modules 30 are the same.
As shown in fig. 9 and 10, the heat conducting member 40 is disposed in the gap 35 between the winding modules 30, at least a portion of the surface of the heat conducting member 40 is attached to the motor housing 10, and at least a portion of the surface of the heat conducting member 40 is attached to the winding modules 30.
In one embodiment, the heat conducting member 40 is S-shaped and is disposed in the gaps 35 between the winding modules 30, and partially wraps the winding modules 30, so that the heat conducting member 40 fills the gaps between the adjacent winding modules 30, the heat conducting member 40 is extruded in the two winding modules 30, and part of the surface area of the heat conducting member 40 is adhered to the insulating heat conducting cloth 34 for conducting heat, and meanwhile, the head end, the tail end and the middle part of the heat conducting member 40 are adhered to the inner wall of the motor housing 10 for conducting heat generated by the winding modules 30, so that the heat generated by the winding modules 30 can be transferred to the motor housing 10.
As shown in fig. 11, the heat conducting member 40 includes a flexible heat conducting sheet 41 and a flexible medium 42, the flexible medium 42 has a certain thickness, and the thickness is greater than or equal to the gap size between any adjacent winding modules 30, and the flexible heat conducting sheet 41 is arranged to cover the surface of the flexible medium 42. The flexible heat conductive sheet 41 includes a graphite heat conductive film, and the flexible medium 42 includes foam or soft heat conductive silica gel.
As shown in fig. 1, a cover plate 20 is provided to cover the motor housing 10 and to cover the installation space 11. The cover plate 20 has a surface formed with a heat conductive portion filling the remaining space in the installation space 11. The cover plate 20 and the heat conducting part are integrally cured and formed by a filler with good heat conducting performance. In one embodiment, the filler comprises an epoxy resin.
The embodiment of the invention also provides a manufacturing method of the linear motor, which comprises the steps of providing a motor shell and arranging a cooling channel s1 on the motor shell; installing a plurality of winding modules s2 in the motor casing, wherein gaps are formed between adjacent winding modules; filling the heat conducting piece in a gap s3 between a plurality of winding modules, wherein part of the area of the surface of the heat conducting piece is attached to the motor shell; potting filler is applied to the motor housing and cured s4.
In one embodiment, first, fabrication of the bottom plate and the side plates is performed, including opening of cooling channels. Subsequently, the assembly of the winding module is carried out: a plurality of silicon steel sheets are stacked into an integral iron core, an insulating plastic framework is sleeved on the iron core, then a copper enameled wire is wound on the insulating framework, a flat appearance surface is formed after a plurality of windings of winding, and a layer of insulating heat-conducting cloth is wrapped on the appearance surface of the copper enameled wire to cover the copper wire completely, so that a complete winding module is formed. Then, a plurality of winding modules are fixed on the bottom plate, the iron core and the bottom plate are locked and fixed, and uniform gaps are formed between the adjacent winding modules. Furthermore, the flexible heat conducting piece is S-shaped to wrap the winding module, so that the heat conducting piece fills a gap between adjacent windings, and is extruded in the two windings; simultaneously, the upper, lower, front and rear side plates are locked on the bottom plate, and the head and tail of the heat conducting piece are respectively bonded with the front side plate and the rear side plate for heat conduction; the upper side plate and the lower side plate are bonded with the corresponding side surfaces of the heat conducting piece for heat conduction; the upper side plate, the lower side plate, the front side plate and the rear side plate are transversely and longitudinally arranged, meanwhile, cooling flow channels in the upper side plate, the lower side plate and the rear side plate are mutually communicated, the tail parts of the flow channels are blocked by plugs, and therefore a cooling liquid inlet and a cooling liquid outlet are formed on the same side. Finally, the motor shell is encapsulated by epoxy resin, and the resin can flow to the part between windings or between windings and the motor shell, which is not in contact and tight, so as to fill, thereby improving the heat conduction efficiency.
Compared with the prior art, the linear motor provided by the embodiment of the invention has the advantages that the heat of the winding modules can be led out through the heat conducting piece and the cooling liquid injected into the motor shell through the motor shell and the heat conducting piece arranged among the winding modules, so that the temperature of the motor is greatly reduced, and the service life and the performance of the motor are improved.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (8)
1. A linear motor, comprising:
a motor housing in which an installation space is formed, and a cooling passage through which a cooling liquid circulates is formed in a housing wall of the motor housing;
the winding modules are arranged in the installation space, and gaps are formed between adjacent winding modules;
the heat conducting piece is arranged in the gap between the winding modules, fills the gap between the adjacent winding modules, is extruded in the two winding modules, at least part of the surface of the heat conducting piece is attached to the motor casing, and at least part of the surface of the heat conducting piece is attached to the winding modules;
the heat conducting piece comprises a flexible heat conducting sheet and a flexible medium, the flexible medium has a certain thickness, the thickness is larger than or equal to the gap between any two adjacent winding modules, and the flexible heat conducting sheet is arranged to cover the surface of the flexible medium;
the motor shell comprises a bottom plate and side plates surrounding the bottom plate;
a first cooling liquid outlet and a first cooling liquid inlet are formed on the bottom plate, and a first cooling channel which is communicated with the first cooling liquid outlet and the first cooling liquid inlet is formed in the bottom plate;
the side plate is provided with a second cooling liquid outlet and a second cooling liquid inlet, and a second cooling channel which is communicated with the second cooling liquid outlet and the second cooling liquid inlet is formed in the side plate.
2. The linear motor of claim 1, wherein the heat conducting member is S-shaped and is disposed in a gap between the plurality of winding modules, and the head end, the tail end and the middle part area of the heat conducting member are respectively attached to the inner wall of the motor housing.
3. The linear motor of claim 1, wherein the first cooling channel is arranged in an S-shaped serpentine configuration; the second cooling channel is arranged in a U shape or an S shape.
4. The linear motor of claim 1, further comprising a cover plate disposed over the motor housing and covering the mounting space.
5. The linear motor of claim 4, wherein the cover plate surface is formed with a heat conduction part filling the remaining space in the installation space.
6. The linear motor of claim 5, wherein the cover plate and the heat conducting portion are integrally cured and formed by a filler having good heat conducting property.
7. The linear motor of claim 1, wherein the winding module comprises an iron core, an enameled wire, an insulating framework and insulating heat-conducting cloth, the iron core comprises a plurality of silicon steel sheets which are stacked, the insulating framework is sleeved on the iron core, the enameled wire is wound on the insulating framework to form a coil, the insulating heat-conducting cloth is wrapped on the surface of the coil, and a part of the area of the surface of the heat-conducting piece is attached to the insulating heat-conducting cloth.
8. A method of manufacturing a linear motor, comprising:
providing a motor shell, and arranging a cooling channel on the motor shell, wherein the motor shell comprises a bottom plate and side plates arranged on the periphery of the bottom plate;
a first cooling liquid outlet and a first cooling liquid inlet are formed on the bottom plate, and a first cooling channel which is communicated with the first cooling liquid outlet and the first cooling liquid inlet is formed in the bottom plate;
a second cooling liquid outlet and a second cooling liquid inlet are formed on the side plate, and a second cooling channel which is communicated with the second cooling liquid outlet and the second cooling liquid inlet is formed in the side plate;
installing a plurality of winding modules in the motor shell, and forming gaps between adjacent winding modules;
filling the heat conducting piece in gaps among the winding modules, and attaching part of the area of the surface of the heat conducting piece to the motor shell;
the flexible heat-conducting piece S-shaped wrapping winding modules enable the heat-conducting piece to fill gaps between adjacent winding modules, the heat-conducting piece is extruded in the two winding modules, and simultaneously the upper side plate, the lower side plate, the front side plate and the rear side plate are locked on the bottom plate, and the head part and the tail part of the heat-conducting piece are respectively bonded with the front side plate and the rear side plate for heat conduction; the upper side plate and the lower side plate are bonded with the corresponding side surfaces of the heat conducting piece for heat conduction;
potting filler is applied to the motor housing and cured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211021407.3A CN115208133B (en) | 2022-08-24 | 2022-08-24 | Linear motor and method for manufacturing the same |
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| CN202211021407.3A CN115208133B (en) | 2022-08-24 | 2022-08-24 | Linear motor and method for manufacturing the same |
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| CN115208133B true CN115208133B (en) | 2023-10-20 |
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