Rotor winding heat dissipation structure and flat linear motor

Abstract

The application provides a mover winding heat dissipation structure and a flat linear motor. The mover winding heat dissipation structure comprises a mover iron core and a plurality of U-shaped heat spreading plates. A plurality of first insertion slots penetrating the iron core main body are arranged in the horizontal grooves on the upper end surface of the iron core main body at intervals. The U-shaped heat spreading plates are inverted on the horizontal grooves and the side plates of the U-shaped heat spreading plates are inserted into the first insertion slots. The two side plates of the U-shaped heat spreading plates are attached to the two sides of the winding on the winding support column, and the top plate is attached to the top surface of the horizontal groove of the iron core main body. The thickness of the top plate is consistent with the depth of the horizontal groove. The top plate of the U-shaped heat spreading plate is in contact with the cooling module of the flat linear motor arranged on the iron core main body. The heat dissipation structure improves the longitudinal heat transfer efficiency of the mover iron core, reduces the thermal resistance between the windings and between the windings and the mover iron core, significantly improves the heat dissipation efficiency of the internal windings, and improves the use power of the motor.

Description

Technical Field

[0001] This invention relates to the field of flat linear motor technology, specifically to a mover winding heat dissipation structure and a flat linear motor. Background Technology

[0002] As electric motors develop towards higher power density, the problem of rapidly increasing heat generation has arisen. Therefore, heat dissipation is a crucial factor restricting motor development, and effectively solving the motor overheating problem has become key to increasing the ultimate power and achieving weight reduction. Natural air cooling and liquid cooling are the mainstream heat dissipation technologies for linear motors. Their principle is that the motor's copper wire windings transfer heat to the outer casing through insulation layers and the iron core, where the heat is then dissipated by air or a liquid working fluid.

[0003] There are two heat transfer paths for the windings closest to the magnets and furthest from the cooling module: ① Heat from the heating windings is transferred laterally to the iron core, and then longitudinally to the cooling module within the iron core. ② Heat is transferred longitudinally upwards through the interior of the windings to both the iron core and the cooling module. However, because the iron core itself has low thermal conductivity, and the insulating varnish and air gaps on the windings affect heat transfer, the thermal resistance is extremely high, making effective heat dissipation of the windings inside the linear motor impossible. The temperature of this part of the copper wire has become an important indicator for measuring whether the linear motor has reached its protection temperature.

[0004] Therefore, improving the heat transfer efficiency of the iron core is of great significance for reducing the internal winding temperature and achieving efficient heat dissipation and power enhancement of linear motors. Summary of the Invention

[0005] In view of this, the technical problem to be solved by the present invention is to propose a mover winding heat dissipation structure and a flat linear motor. The mover winding heat dissipation structure realizes efficient heat dissipation of the internal windings of the flat linear motor based on a multi-stage phase change heat transfer network.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A mover winding heat dissipation structure includes a mover core and several U-shaped heat dissipation plates. The mover core includes a core body and several winding support columns at the lower end. A horizontal groove is provided on the upper end surface of the core body along the length direction of the core body. Several first slots penetrating the core body are provided at intervals along the width direction of the core body in the horizontal groove, and each first slot is positioned between two adjacent winding support columns. The U-shaped heat dissipation plate includes side plates on both sides and a top plate connecting the side plates. The overall structure is U-shaped. The U-shaped heat dissipation plate is inverted on the horizontal groove and the side plates of the U-shaped heat dissipation plate are inserted into the first slots. The two side plates of the U-shaped heat dissipation plate are close to the two sides of the winding on the winding support columns, while the top plate is close to the top surface of the horizontal groove of the core body. The thickness of the top plate is the same as the depth of the horizontal groove. The top plate of the U-shaped heat dissipation plate is in contact with the cooling module of a flat linear motor disposed on the core body.

[0008] Preferably, a plurality of second slots are provided in the horizontal groove of the iron core body corresponding to the position of the winding support column. The depth of the second slots exceeds the thickness of the iron core body, so that the bottom of the second slots extends into the interior of the winding support column. An "I"-shaped heat dissipation plate is embedded in the second slot. The two sides of the "I"-shaped heat dissipation plate are in contact with the winding support column, and the top of the "I"-shaped heat dissipation plate is in contact with the "U"-shaped heat dissipation plate.

[0009] Preferably, a rectangular heat spreader is provided between the cooling module and the "U"-shaped heat spreader, the rectangular heat spreader fully covering the iron core body and the "U"-shaped heat spreader, and the cooling module is attached to the rectangular heat spreader.

[0010] Preferably, the second slot is arranged longitudinally in the moving iron core, and the longitudinally arranged heat spreader allows the heat around the entire winding support column to be evenly transferred upwards.

[0011] Preferably, each of the winding support columns is provided with at least one second slot, and the second slot is provided with at least one heat spreader.

[0012] Preferably, thermally conductive adhesive is injected into the contact points (point or line contact) between the "I"-shaped heat spreader and the winding support column, between the rectangular heat spreader and the cooling module, between the rectangular heat spreader and the "U"-shaped heat spreader, between the rectangular heat spreader and the core body, between the "U"-shaped heat spreader and the winding, between the winding and the winding support column, and between the "U"-shaped heat spreader and the "I"-shaped heat spreader to fill the air gaps and reduce thermal resistance. The thermally conductive adhesive can be replaced with other thermally conductive interface materials, such as thermally conductive putty.

[0013] It should be noted that any increase or decrease in the number of "U"-shaped heat spreaders, "I"-shaped heat spreaders, or rectangular heat spreaders inspired by this invention, any change in the number of slots on the iron core body for embedding heat spreaders, any change in the number of "U"-shaped heat spreaders, "I"-shaped heat spreaders, or rectangular heat spreader parameters (such as length, width, thickness, bend radius, etc.), any change in the embedding depth and contact area of ​​each heat spreader, or any other changes that do not depart from the spirit of this invention, shall fall within the scope of protection of this invention.

[0014] A flat linear motor includes a stator, a mover, a cooling module, and a U-shaped heat dissipation plate. The stator is located at the lower end of the mover and includes magnets and guide rails. The mover includes a mover core, and the cooling module is located at the top of the mover core.

[0015] The moving core includes a core body and several winding support columns at the lower end. A horizontal groove is provided on the upper end surface of the core body along the length direction of the core body. Several first slots penetrating the core body are provided in the horizontal groove along the width direction of the core body at intervals. The position of each first slot is correspondingly set between two adjacent winding support columns.

[0016] The U-shaped heat spreader includes two side plates and a top plate connecting the two side plates, and its overall structure is U-shaped. The U-shaped heat spreader is inverted on the horizontal groove and the side plates of the U-shaped heat spreader are inserted into the first slot. The two side plates of the U-shaped heat spreader are close to the two sides of the winding on the winding support column, while the top plate is close to the top surface of the horizontal groove of the iron core body. The thickness of the top plate is the same as the depth of the horizontal groove. The top plate of the U-shaped heat spreader is in contact with the cooling module of the flat linear motor set on the iron core body.

[0017] Preferably, a plurality of second slots are provided in the horizontal groove of the iron core body corresponding to the position of the winding support column. The depth of the second slots exceeds the thickness of the iron core body, so that the bottom of the second slots extends into the interior of the winding support column. An "I"-shaped heat dissipation plate is embedded in the second slot. The two sides of the "I"-shaped heat dissipation plate are in contact with the winding support column, and the top of the "I"-shaped heat dissipation plate is in contact with the "U"-shaped heat dissipation plate.

[0018] Preferably, a rectangular heat spreader is provided between the cooling module and the "U"-shaped heat spreader, the rectangular heat spreader fully covering the iron core body and the "U"-shaped heat spreader, and the cooling module is attached to the rectangular heat spreader.

[0019] Preferably, the second slot is arranged longitudinally in the moving iron core, and the longitudinally arranged heat spreader allows the heat around the entire winding support column to be evenly transferred upwards.

[0020] Preferably, each of the winding support columns is provided with at least one second slot, and the second slot is provided with at least one heat spreader.

[0021] Preferably, thermally conductive adhesive is injected into the contact points (point or line contact) between the "I"-shaped heat spreader and the winding support column, between the rectangular heat spreader and the cooling module, between the rectangular heat spreader and the "U"-shaped heat spreader, between the rectangular heat spreader and the core body, between the "U"-shaped heat spreader and the winding, between the winding and the winding support column, and between the "U"-shaped heat spreader and the "I"-shaped heat spreader to fill the air gaps and reduce thermal resistance. The thermally conductive adhesive can be replaced with other thermally conductive interface materials, such as thermally conductive putty.

[0022] The cooling module of the flat linear motor is an air-cooled plate or a liquid-cooled plate.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. It can improve the heat dissipation of the internal windings of the linear motor, reduce the motor winding temperature, increase the motor overload operation multiple, and realize the miniaturization and high power density of the motor.

[0025] 2. It is implemented based on a heat spreader, resulting in low cost.

[0026] 3. The structure is simple, the assembly requirements are not high, the parts involved do not have high precision requirements, and it is easy to process. Attached Figure Description

[0027] Figure 1 This is an exploded view of the heat dissipation structure of the moving rotor winding in Example 1;

[0028] Figure 2 This is a cross-sectional schematic diagram of the heat dissipation structure of the moving rotor winding in Example 1;

[0029] Figure 3 This is a schematic diagram of the moving core structure in Example 1;

[0030] Figure 4 This is a schematic diagram of the rectangular heat spreader in Example 1;

[0031] Figure 5 This is a three-dimensional structural diagram of the "U"-shaped heat spreader and the "I"-shaped heat spreader in Example 1;

[0032] Figure 6 This is an assembly diagram of the mover winding heat dissipation structure in Example 1.

[0033] In the figure: 1 moving core, 11 core body, 12 winding support column, 13 horizontal groove, 14 first slot, 15 second slot, 2 "U" shaped heat spreader, 2 side plate, 21 top plate, 22 winding, 3 cooling module, 4 "I" shaped heat spreader, 5 rectangular heat spreader. Detailed Implementation

[0034] To enable those skilled in the art to understand the present invention more clearly and intuitively, the present invention will be further described below with reference to the accompanying drawings.

[0035] Example 1

[0036] like Figure 1-6 As shown, a moving element winding heat dissipation structure of this embodiment includes a moving element core 1 and seven "U"-shaped heat dissipation plates 2. The moving element core 1 includes a core body 11 and seven winding support columns 12 at the lower end. A horizontal groove 13 is provided on the upper end surface of the core body 11 along the length direction of the core body 11. Six first slots 14 penetrating the core body 11 are provided in the horizontal groove 13 at intervals along the width direction of the core body 11, and the position of each first slot 14 is correspondingly arranged between two adjacent winding support columns 12.

[0037] The U-shaped heat spreader 2 includes two side plates 21 and a top plate 22 connecting the two side plates 21. It has an overall U-shaped structure. The U-shaped heat spreader 2 is upside down on the horizontal groove 13 and the side plates 21 of the U-shaped heat spreader 2 are inserted into the first slot 14. The two side plates 21 of the U-shaped heat spreader 2 are close to the two sides of the winding 3 on the winding support column 12, while the top plate 22 is close to the top surface of the horizontal groove 13 of the iron core body 11. The thickness of the top plate 22 is the same as the depth of the horizontal groove 13, so that the horizontal groove 13 of the iron core body 11 is filled. The top plate 22 of the U-shaped heat spreader 2 is in contact with the cooling module 4 of the flat linear motor set on the iron core body 11.

[0038] Seven second slots 15 are provided in the horizontal groove 13 of the iron core body 11 at the position corresponding to the winding support column 12. The depth of the second slots 15 exceeds the thickness of the iron core body 11, so that the bottom of the second slots 15 extends into the interior of the winding support column 12. An "I"-shaped heat dissipation plate 5 is embedded in the second slots 15. The two sides of the "I"-shaped heat dissipation plate 5 are in contact with the winding support column 12, and the top of the "I"-shaped heat dissipation plate 5 is in contact with the "U"-shaped heat dissipation plate 2.

[0039] A rectangular heat spreader 6 is also provided between the cooling module 4 and the "U"-shaped heat spreader 2. The rectangular heat spreader 6 fully covers the iron core body 11 and the "U"-shaped heat spreader 2, and the cooling module 4 is attached to the rectangular heat spreader 6.

[0040] The second slot 15 is arranged longitudinally in the moving iron core 11, and the longitudinally arranged heat spreader plate allows the heat around the entire winding support column 12 to be evenly transferred upwards.

[0041] Each winding support post 12 is provided with at least one second slot 15, and the second slot 15 is provided with at least one "I"-shaped heat spreader 5.

[0042] Thermally conductive adhesive is injected into the points of contact or line contact between the "I"-shaped heat spreader 5 and the winding support column 12, between the rectangular heat spreader 6 and the cooling module 4, between the rectangular heat spreader 6 and the "U"-shaped heat spreader 2, between the rectangular heat spreader 6 and the core body 11, between the "U"-shaped heat spreader 2 and the winding 3, between the winding 3 and the winding support column 12, and between the "U"-shaped heat spreader 2 and the "I"-shaped heat spreader 5, to fill the air gaps and reduce thermal resistance. The thermally conductive adhesive can be replaced with other thermally conductive interface materials, such as thermally conductive putty.

[0043] Example 2

[0044] A flat linear motor includes the mover winding heat dissipation structure of Embodiment 1.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mover winding heat dissipation structure, characterized in that, The mover iron core comprises a core body and a plurality of winding support columns at the lower end, a horizontal groove is arranged on the upper end surface of the core body along the length direction of the core body, a plurality of first insertion slots penetrating the core body are arranged in the horizontal groove along the width direction of the core body at intervals, and the position of each first insertion slot corresponds to being arranged between two adjacent winding support columns. The "U"-shaped heat plate comprises side plates at two sides and a top plate connecting the side plates, and the overall structure is in a "U" shape, the "U"-shaped heat plate is inverted on the horizontal groove and the side plates of the "U"-shaped heat plate are inserted from the first insertion slots, the two side plates of the "U"-shaped heat plate are close to the two sides of the winding on the winding support column, and the top plate is close to the top surface of the horizontal groove of the core body; the thickness of the top plate is consistent with the depth of the horizontal groove. A rectangular heat plate and a cooling module of a flat linear motor are sequentially arranged on the top plate of the "U"-shaped heat plate, and the cooling module is arranged on the rectangular heat plate. A plurality of second insertion slots are arranged in the horizontal groove of the core body corresponding to the positions of the winding support columns, the depth of the second insertion slot exceeds the thickness of the core body, the bottom of the second insertion slot extends to the inside of the winding support column, and an "I"-shaped heat plate is embedded in the second insertion slot; in addition, the second insertion slot is longitudinally arranged in the mover iron core. The two side surfaces of the "I"-shaped heat plate are in contact with the winding support column, and the top end of the "I"-shaped heat plate is in contact with the "U"-shaped heat plate.

2. The mover winding heat dissipation structure of claim 1, wherein, The rectangular heat plate fully covers the core body and the "U"-shaped heat plate.

3. The mover winding heat dissipation structure of claim 2, wherein, Thermal conductive glue is arranged at positions where point contact or line contact occurs between the "I"-shaped heat plate and the winding support column, between the rectangular heat plate and the cooling module, between the rectangular heat plate and the "U"-shaped heat plate, between the rectangular heat plate and the core body, between the "U"-shaped heat plate and the winding, between the winding and the winding support column, and between the "U"-shaped heat plate and the "I"-shaped heat plate.

4. The mover winding heat dissipation structure of claim 1, wherein, The mover iron core comprises a core body and a plurality of winding support columns at the lower end, a horizontal groove is arranged on the upper end surface of the core body along the length direction of the core body, a plurality of first insertion slots penetrating the core body are arranged in the horizontal groove along the width direction of the core body at intervals, and the position of each first insertion slot corresponds to being arranged between two adjacent winding support columns.

5. A planar linear motor, characterized by The "U"-shaped heat plate comprises side plates at two sides and a top plate connecting the side plates, and the overall structure is in a "U" shape, the "U"-shaped heat plate is inverted on the horizontal groove and the side plates of the "U"-shaped heat plate are inserted from the first insertion slots, the two side plates of the "U"-shaped heat plate are close to the two sides of the winding on the winding support column, and the top plate is close to the top surface of the horizontal groove of the core body; the thickness of the top plate is consistent with the depth of the horizontal groove. A rectangular heat plate and a cooling module of a flat linear motor are sequentially arranged on the top plate of the "U"-shaped heat plate, and the cooling module is arranged on the rectangular heat plate. ​ ​ Second slots are arranged in the horizontal recess of the core body corresponding to the positions of the winding support columns, the depth of the second slots exceeds the thickness of the core body, the bottom of the second slots extends to the inside of the winding support columns, and an "I" shaped heat plate is embedded in the second slots; in addition, the second slots are longitudinally arranged in the rotor core.

6. A planar linear motor as claimed in claim 5, characterised in that, The two side surfaces of the "I" shaped heat plate contact the winding support columns, and the top end of the "I" shaped heat plate contacts the "U" shaped heat plate.

7. A planar linear motor as claimed in claim 5, characterised in that, The rectangular heat plate fully covers the core body and the "U" shaped heat plate.

8. A planar linear motor as claimed in claim 5, characterized in that Thermal conductive glue is arranged at positions where point contact or line contact occurs between the "I" shaped heat plate and the winding support column, between the rectangular heat plate and the cooling module, between the rectangular heat plate and the "U" shaped heat plate, between the rectangular heat plate and the core body, between the "U" shaped heat plate and the winding, between the winding and the winding support column, and between the "U" shaped heat plate and the "I" shaped heat plate.

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