CN115208133A - Linear motor and method for manufacturing same - Google Patents
Linear motor and method for manufacturing same Download PDFInfo
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- CN115208133A CN115208133A CN202211021407.3A CN202211021407A CN115208133A CN 115208133 A CN115208133 A CN 115208133A CN 202211021407 A CN202211021407 A CN 202211021407A CN 115208133 A CN115208133 A CN 115208133A
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- heat
- linear motor
- heat conducting
- motor
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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—Methods 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—Methods 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
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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
- 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
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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
-
- 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 and circulating cooling liquid is formed on the shell wall of the motor shell; the plurality of winding modules are arranged in the mounting space, and a gap is formed between every two 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 shell, and at least part of the surface of the heat conducting piece is attached to the winding modules. The linear motor can efficiently conduct heat to the winding module in the linear motor so as to 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, a linear motor is widely applied to industrial machinery, and as a direct-drive mode, the linear motor has no intermediate transmission mechanism, so that the linear motor has higher speed, acceleration and dynamic response. Because linear electric motor can produce great heat in the course of the work, the heat seriously influences motor thrust's improvement isomotor performance, especially powerful linear electric motor, consequently how to solve the motor heat dissipation problem, prior art still awaits improvement and development.
Linear electric motor motion has the problem of generating heat, and the heat mainly comes from motor (elementary), and the minority is from magnetic sheet (secondary), and the heat of motor mainly derives from copper loss and iron loss, and the copper loss mainly is the heat effect of wire winding module, and the iron loss comes from hysteresis loss and the eddy current loss of iron core. Many existing linear motor winding modules cannot be cooled, particularly the interior of the winding module cannot be cooled, or some winding modules are filled with resin for cooling, but the heat conduction efficiency of the resin is poor, particularly after the resin is cooled and solidified, air bubbles exist in the winding modules, 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 skilled in the art.
Disclosure of Invention
The invention aims to provide a linear motor and a manufacturing method thereof, which can efficiently conduct heat and further cool a winding module in the linear motor, and can effectively solve the heating problem of the high-thrust linear motor.
In order to achieve the above objective, 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 and circulating cooling liquid is formed on the shell wall of the motor shell; the plurality of winding modules are arranged in the mounting space, and a gap is formed between every two 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 shell, 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, and the thickness is greater than or equal to a size of a gap 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 inserted into a gap between the plurality of winding modules, and a head end, a tail end, and a middle portion of the heat conducting member are respectively attached to an inner wall of the motor housing.
In one or more embodiments of the present invention, the flexible heat conducting sheet includes a graphite heat conducting film, and the flexible medium includes foam or soft heat conducting silica gel.
In one or more embodiments of the 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 in the bottom plate, and a first cooling channel communicated with the first cooling liquid outlet and the first cooling liquid inlet is formed in the bottom plate; and a second cooling liquid outlet and a second cooling liquid inlet are formed in the side plate, and a second cooling channel 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 invention, the first cooling channel is arranged in an S-shaped detour manner; 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 covering the motor housing and disposed to cover the installation space.
In one or more embodiments of the present invention, the cover plate surface is formed with a heat conduction portion that fills a remaining space in the installation space.
In one or more embodiments of the present invention, the cover plate and the heat conduction portion are integrally cured and molded by a filler having a good heat conduction property.
In one or more embodiments of the invention, the filler includes an epoxy resin.
In one or more embodiments of the present invention, the winding module includes an iron core, an enameled wire, an insulating skeleton, and an insulating heat conducting cloth, the iron core includes a plurality of stacked silicon steel sheets, the insulating skeleton is sleeved on the iron core, the enameled wire is wound on the insulating skeleton to form a coil, the insulating heat conducting cloth is wrapped on a surface of the coil, and a partial area of a surface of the heat conducting element is attached to the insulating heat conducting cloth.
In one or more embodiments of the present invention, the silicon steel sheets are arranged in a T shape, the enameled wire is a copper enameled wire, the copper enameled wire is wound on the insulating framework for multiple turns to form a coil with a flat outer surface, and the insulating heat-conducting cloth completely covers the outer 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 the same.
The embodiment of the invention also provides a manufacturing method of the linear motor, which comprises the following steps:
providing a motor shell and arranging a cooling channel on the motor shell;
a plurality of winding modules are arranged in the motor shell, and gaps are formed between every two adjacent winding modules;
filling a heat conducting piece in gaps among the plurality of winding modules, wherein part of the surface of the heat conducting piece is attached to the motor shell;
and filling and curing the filling agent on the motor shell.
Compared with the prior art, the linear motor provided by the embodiment of the invention has the advantages that through the motor shell and the heat conducting pieces arranged among the winding modules, the heat of the winding modules can be led out through the heat conducting pieces and the cooling liquid injected into the motor shell, 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 perspective view illustrating a linear motor according to an embodiment of the present invention;
fig. 2 is a schematic view of an internal structure of a linear motor according to an embodiment of the present invention;
fig. 3 is a structural view of a motor housing of a linear motor according to an embodiment of the present invention;
FIG. 4 is a transverse cross-sectional view of a bottom plate in a motor housing of a linear motor according to an embodiment of the present invention;
fig. 5 is a structural view of a winding module of a linear motor according to an embodiment of the present invention;
fig. 6 is a 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 view illustrating a winding module of a linear motor according to an embodiment of the present invention 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 sectional view of a linear motor according to an embodiment of the present invention;
fig. 11 is a structural view of a heat conducting member of a linear motor according to an embodiment of the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As background art, linear motors are increasingly widely used in industrial machinery due to their high speed, acceleration and dynamic response, but they also have a problem of heat generation, and heat generated by the winding module cannot be effectively transferred and discharged, which seriously affects the performance of the motor.
In order to solve the technical problem, the invention provides a linear motor, which can efficiently conduct heat and further cool a winding module in the linear motor through a motor shell capable of circulating cooling liquid and a heat conducting piece, and can effectively solve the heating problem of the high-thrust linear motor.
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 plate 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 to the motor housing 10 and discharge the heat to the outside. The cover plate 20 is disposed on the motor housing 10 and covers the installation space 11, and the cover plate 20 also assists the heat conduction member 40 in conducting heat and cooling the winding module 30.
As shown in fig. 3, the motor housing 10 includes a bottom plate 12 and side plates 13 disposed around the bottom plate 12. The side plate 13 and the bottom plate 12 enclose an installation space 11. A cooling passage through which a cooling fluid circulates is formed in a housing wall of the motor housing 10. For convenience of processing, the bottom plate and the side plate of the motor shell 10 and the side plates can be detachably connected, and in order to prevent the loss of the cooling liquid, the connection between the bottom plate and the side plates and the connection between the side plates and the side plates are located at the edge of the cooling channel and can be provided with annular sealing gaskets.
As shown in fig. 4, a first cooling fluid outlet 121 and a first cooling fluid inlet 122 are formed on the bottom plate 12, a first cooling channel 123 communicating the first cooling fluid outlet 121 and the first cooling fluid inlet 122 is formed inside the bottom plate 12, the first cooling channel is preferably arranged in an S-shaped winding manner, the cooling fluid flows into the bottom plate 12 from the first cooling fluid inlet 122, and S-shaped circulation can be performed inside the bottom plate 12, so that the cooling fluid can pass through the bottom plate 12 in a larger area and then be discharged from the first cooling fluid outlet 121.
In one embodiment, a plurality of transverse flow channels and a plurality of longitudinal flow channels may be formed in 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 complete directional flow channel is ensured from the first cooling liquid inlet 122 to the first cooling liquid outlet 121, backflow and mixed flow are avoided, and heat can be smoothly conducted out through the cooling liquid.
The side plates 13 are also provided with cooling channels, the cooling channels of 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 an embodiment, a plurality of transverse flow channels may also be formed on the side plate 13, when the side plate 13 is assembled on the bottom plate 12, the transverse flow channels inside the side plate are mutually communicated, and one end of a part of the transverse flow channels is blocked by a plug, so that the plurality of transverse flow channels form a circulation loop, such as a U-shaped loop or an S-shaped loop, having an inlet 132 and an outlet 133, for flowing the cooling fluid.
In other embodiments, the second cooling channel 131 on the side plate 13 may also communicate with the first cooling channel 123 on the bottom plate 12, and only one set of cooling liquid inlet and outlet is left, which is convenient for a customer to install a cooling pipe.
As shown in fig. 5 to 7, the winding module 30 includes an iron core 31, an enamel wire 32, an insulating skeleton 33 and an insulating and heat-conducting cloth 34. The iron core 31 is a whole 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 insulation framework 33 is sleeved on the iron core 31, the enameled wire 32 is wound on the insulation framework 33 to form a coil, and the insulation heat-conducting cloth 34 is wrapped on the surface of the coil. The enameled wire 32 is preferably a copper enameled wire, the insulating skeleton 33 is preferably a plastic insulating skeleton, the copper enameled wire is wound on the plastic insulating skeleton for multiple turns to form a coil with a flat outer surface, and the outer surface of the copper enameled wire is further wrapped with a layer of insulating and heat-conducting cloth 34 to completely cover the copper enameled wire, so as to form a complete winding module 30.
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 locked and fixed with the bottom plate 12, a uniform gap 35 is formed between adjacent winding modules 30, and the sizes of the gaps 35 between the plurality of winding modules 30 are the same.
As shown in fig. 9 and 10, the heat conduction member 40 is disposed in the gap 35 between the winding modules 30, at least a partial area of the surface of the heat conduction member 40 is attached to the motor housing 10, and at least a partial area of the surface of the heat conduction member 40 is attached to the winding modules 30.
In an embodiment, the heat conducting member 40 is S-shaped and is inserted into the gap 35 between the plurality of winding modules 30, and partially wraps the winding modules 30, so that the heat conducting member 40 fills the gap between the adjacent winding modules 30, the heat conducting member 40 is extruded into the two winding modules 30, a partial area of the surface of the heat conducting member is attached to the insulating heat conducting cloth 34 for heat conduction, and meanwhile, the head end, the tail end and the middle area of the heat conducting member 40 are respectively attached to the inner wall of the motor housing 10 for heat conduction, so that 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 size of the gap between any adjacent winding modules 30, and the flexible heat conducting sheet 41 covers the surface of the flexible medium 42. The flexible heat conducting sheet 41 includes a graphite heat conducting film, and the flexible medium 42 includes foam or soft heat conducting silica gel.
As shown in fig. 1, the cover plate 20 is provided to cover the motor housing 10 and to cover the mounting space 11. The surface of the cover plate 20 is formed with a heat conduction portion that fills the remaining space in the mounting space 11. The cover plate 20 and the heat conducting portion are integrally formed by curing a filler having a high heat conducting property. 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; a plurality of winding modules s2 are arranged in the motor shell, wherein gaps are formed between every two adjacent winding modules; filling a heat conducting piece in gaps among the plurality of winding modules s3, wherein a partial area of the surface of the heat conducting piece is attached to the motor shell; the filling agent is potted and cured s4 on the motor housing.
In one embodiment, first, the bottom plate and the side plate are fabricated, including the cooling channels. And then, assembling a winding module: a plurality of silicon steel sheets are folded into a whole iron core, an insulating plastic framework is sleeved on the iron core, a copper enameled wire is wound on the insulating framework, a smooth outer surface is formed after multi-circle winding, and a layer of insulating heat-conducting cloth is wrapped on the outer surface of the copper enameled wire to completely cover a copper wire to form a complete wire winding module. 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. Secondly, wrapping the winding module by a flexible heat conducting piece in an S shape, filling the gaps between the adjacent windings with the heat conducting piece, and extruding the heat conducting piece into the two windings; simultaneously, locking an upper side plate, a lower side plate, a front side plate and a rear side plate on the bottom plate, and respectively attaching the head part and the tail part of the heat conducting piece to the front side plate and the rear side plate for heat conduction; the upper side plate and the lower side plate are attached to the corresponding side surfaces of the heat conducting pieces for heat conduction; the upper, lower, front and rear four side plates are transversely and longitudinally arranged, and the cooling flow passages in the upper, lower, front and rear four side plates are communicated with each other, the tail of the flow channel is blocked by a plug, so that a cooling liquid inlet and a cooling liquid outlet are formed on the same side. Finally, the motor shell is filled with epoxy resin in a sealing mode, the resin can flow to the position between the winding and the winding or between the winding and the motor shell, the position is not in contact and is not tightly sealed, and heat conduction efficiency is improved.
Compared with the prior art, the linear motor provided by the embodiment of the invention has the advantages that through the motor shell and the heat conducting pieces arranged among the winding modules, the heat of the winding modules can be led out through the heat conducting pieces and the cooling liquid injected into the motor shell, 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 have been 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 certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. A linear motor, comprising:
the cooling device comprises a motor shell, a cooling device and a cooling device, wherein an installation space is formed in the motor shell, and a cooling channel for circulating and circulating cooling liquid is formed on the shell wall of the motor shell;
the winding modules are arranged in the mounting space, and a gap is formed between every two 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 shell, and at least part of the surface of the heat conducting piece is attached to the winding modules.
2. The linear motor of claim 1, wherein the heat conducting member comprises a flexible heat conducting sheet and a flexible medium, the flexible medium has a thickness greater than or equal to a gap between any adjacent winding modules, and the flexible heat conducting sheet is disposed to cover a surface of the flexible medium.
3. The linear motor according to claim 2, wherein the heat-conducting member is S-shaped and inserted into the gaps between the plurality of winding modules, and the head end, the tail end, and the middle portion of the heat-conducting member are respectively attached to the inner wall of the motor housing.
4. A linear motor according to claim 1, wherein the motor housing includes a base plate and side plates surrounding the base plate;
a first cooling liquid outlet and a first cooling liquid inlet are formed in the bottom plate, and a first cooling channel communicated with the first cooling liquid outlet and the first cooling liquid inlet is formed in the bottom plate;
and a second cooling liquid outlet and a second cooling liquid inlet are formed in the side plate, and a second cooling channel communicated with the second cooling liquid outlet and the second cooling liquid inlet is formed in the side plate.
5. The linear motor of claim 4, wherein the first cooling channel is arranged in an S-shaped winding; the second cooling channel is arranged in a U shape or an S shape.
6. A linear motor according to claim 1, further comprising a cover plate provided on the motor housing and covering the installation space.
7. The linear motor of claim 6, wherein the surface of the cap plate is formed with a heat-conducting portion filling a remaining space in the installation space.
8. The linear motor of claim 7, wherein the cover plate and the heat conducting portion are integrally cured and molded by a filler having a good heat conducting property.
9. The linear motor according to claim 1, wherein the winding module includes an iron core, an enamel wire, an insulating frame, and an insulating and heat-conducting cloth, the iron core includes a plurality of silicon steel sheets stacked, the insulating frame is sleeved on the iron core, the enamel wire is wound on the insulating frame to form a coil, the insulating and 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 and heat-conducting cloth.
10. A method of manufacturing a linear motor, comprising:
providing a motor shell and arranging a cooling channel on the motor shell;
a plurality of winding modules are arranged in the motor shell, and gaps are formed between every two adjacent winding modules;
filling a heat conducting piece in gaps among the plurality of winding modules, wherein part of the surface of the heat conducting piece is attached to the motor shell;
and filling and curing the filling agent on the motor shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211021407.3A CN115208133B (en) | 2022-08-24 | 2022-08-24 | Linear motor and method for manufacturing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211021407.3A CN115208133B (en) | 2022-08-24 | 2022-08-24 | Linear motor and method for manufacturing the same |
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| CN115208133A true CN115208133A (en) | 2022-10-18 |
| CN115208133B CN115208133B (en) | 2023-10-20 |
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| Publication number | Publication date |
|---|---|
| CN115208133B (en) | 2023-10-20 |
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