CN210986487U - Variable-turn number induction heating coil - Google Patents
Variable-turn number induction heating coil Download PDFInfo
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- CN210986487U CN210986487U CN201920814675.8U CN201920814675U CN210986487U CN 210986487 U CN210986487 U CN 210986487U CN 201920814675 U CN201920814675 U CN 201920814675U CN 210986487 U CN210986487 U CN 210986487U
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Abstract
The utility model discloses a variable number of turns induction heating coil belongs to the shipbuilding field, and it includes: the coil comprises a coil body, an insulating seat, an electrode assembly and a conducting strip; the coil body is provided with a plurality of turns of coils, and the insulating seat is used for fixing each coil so as to keep the relative position of each coil fixed; a gap is reserved between the coil and the electrode for inserting the conducting strip; and the number of turns of the coil connected into the circuit is changed by adjusting the insertion position of the conducting strip. The utility model discloses a set up multiturn coil, the position that utilizes the conducting strip switches and realizes being connected of electrode and different coils, changes the coil number of turns that inserts the circuit to can adjust the temperature and the regional scope of hot-working with the mode of adjusting the coil number of turns, be favorable to exploring the influence law of different heating methods to panel.
Description
Technical Field
The utility model belongs to the shipbuilding field, more specifically relates to a variable number of turns induction heating coil.
Background
At present, the line heating method is a forming method for a ship curvature plate with a large scale in the prior art of shipyards. The wire heating method is to heat a plate locally and linearly by using a wire heat source such as flame or high-frequency induction, and to generate residual plastic deformation on a workpiece by using the principle of local expansion with heat and contraction with cold, thereby achieving the purpose of bending and forming the plate. In the process, based on the requirement of building the ship structure on the material characteristics, the heating wire after on-line heating can also be assisted by water spraying and rapid cooling so as to improve the forming efficiency.
However, due to the relationship between temperature and material, the actual processing temperature needs to be controlled within a certain range, and the current induction heating device for the ship curvature plate can only adjust the induction temperature by adjusting current or voltage, so that the adjusting capability is limited, and the range of the induction heating region cannot be adjusted, so that the forming efficiency under the conditions of large curvature and thick plate is affected, and the forming efficiency is difficult to further improve.
SUMMERY OF THE UTILITY MODEL
To the above defect of prior art or improve the demand, the utility model provides a variable number of turns induction heating coil, its aim at through setting up multiturn coil, utilizes the position switch of conducting strip to realize being connected of different coils and electrode, changes the coil number of turns that inserts the circuit to can adjust the temperature and the regional scope of hot-working with the mode of adjusting the coil number of turns, be favorable to exploring the influence law of different heating methods to panel.
In order to achieve the above object, the utility model provides a variable number of turns induction heating coil, include: the coil comprises a coil body, an insulating seat, an electrode assembly and a conducting strip;
the coil body comprises n is more than or equal to 2 turns of coils with different diameters and n-1 connecting wires; the coils are arranged from inside to outside one by one and are named as the i-th coil from inside to outside in sequence, i is 1, 2, j, n, and j is more than or equal to 1 and less than or equal to n; each coil is provided with a notch, two ends of the notch are defined as a head end and a tail end respectively, and the tail end of the ith coil is connected with the head end of the (i + 1) th coil through an ith connecting wire, so that all the coils are sequentially connected in series from inside to outside through n-1 connecting wires;
the insulating seat is used for fixing each coil so as to keep the relative position of each coil fixed;
the electrode assembly includes a first electrode plate and a second electrode plate; the first electrode plate is connected with the head end of the first coil; the second electrode plate is positioned right above the tail ends of the j coil to the n coil, and gaps for inserting the conducting strips are reserved between the second electrode plate and the j coil to the n coil;
in a use state, the number k of coil turns of the circuit is accessed according to needs, the conducting strip is inserted between the second electrode plate and the k-th coil to conduct the second electrode plate and the k-th coil, so that the number of coil turns accessed into the circuit is changed by changing the insertion position of the conducting strip, and the variable range of the number k of coil turns is j not less than k not more than n.
Furthermore, the device also comprises a limiting connection column assembly and a pressing assembly;
the limiting connecting column component comprises at least two connecting columns, the connecting columns are parallel to each other, and the bottom ends of the connecting columns are fixed on different coils respectively;
the second electrode plate is provided with a protruding conductive pressing block, the conductive pressing block is provided with guide holes corresponding to the number and positions of the connecting columns one by one, the connecting columns are located in the guide holes one by one, and the connecting columns are made of insulating materials or insulating sleeves are arranged between the connecting columns and the guide holes;
in the use state, the pressing component is matched with the connecting column to press the conductive pressing block downwards so that the conductive pressing block, the conductive sheet and the appointed coil are in close contact.
Furthermore, the tail ends of the j-th coil to the n-th coil are respectively provided with a connecting column, and the pressing assembly is arranged on the connecting column corresponding to the inserting position of the conducting strip in a use state.
Furthermore, the top end of the connecting column is provided with a screw hole; the crimping component comprises a pressing block and a screw; when the conductive pressing block is used, the pressing block is arranged on the connecting column by matching the screw and the screw hole so as to adjust the pressure of the pressing block on the conductive pressing block.
Furthermore, the top end of the connecting column is provided with an external thread, and the pressing block is provided with a threaded hole matched with the external thread.
Furthermore, a first electrode liquid cooling channel is arranged in the first electrode plate, and a second electrode liquid cooling channel is arranged in the second electrode plate; each coil and each connecting wire are of hollow tubular structures, and the hollow parts are connected in series to form a coil liquid cooling channel;
a coil cooling liquid inlet of the coil liquid cooling channel is positioned at the head end of the first coil and is communicated with a first electrode cooling liquid outlet of the first electrode liquid cooling channel; a coil cooling liquid outlet of the coil liquid cooling channel is positioned at the tail end of the nth coil and is communicated with a second electrode cooling liquid inlet of the second electrode liquid cooling channel through an insulating pipeline;
and a first electrode cooling liquid inlet of the first electrode liquid cooling channel is used for allowing cooling liquid to flow in during working, and a second electrode cooling liquid outlet of the second electrode liquid cooling channel is used for allowing cooling liquid to flow out during working.
Further, the conductive pressing block is of a hollow structure, and the second electrode liquid cooling channel passes through the hollow part of the conductive pressing block.
Further, the electrode assembly further includes an insulating plate and an insulating connection member; the insulation board is arranged between the first electrode plate and the second electrode plate, and the insulation board, the first electrode plate and the second electrode plate are fixed through the insulation connecting assembly.
Further, the insulation connecting assembly comprises an insulation bolt and/or an insulation connecting block; the insulating plate, the first electrode plate and the second electrode plate are fixedly connected through insulating bolts; the first electrode plate and the second electrode plate are both fixedly connected with the insulating connecting block.
Further, the shape of each coil is circular or square.
Generally, compared with the prior art, the above technical solution contemplated by the present invention can obtain the following beneficial effects:
1. the utility model discloses a variable number of turns induction heating coil, simple structure, and can be according to actual demand, direct mounted position through changing the conducting strip, change the coil number of turns that inserts the circuit to can adjust heating temperature and heating region scope with the mode of adjusting coil number of turns, coil number of turns k can be adjusted wantonly at the within range of j ~ n, be particularly useful for the occasion that laboratory environment often need be changed laboratory object, experimental condition and experimental content down, be favorable to exploring the influence law of different heating methods to panel.
2. The connecting column is arranged to guide and limit the second electrode plate, and the pressing assembly is adopted to press the conductive pressing block and the conductive sheet, so that the electric contact is more stable, and the work is more stable.
3. The liquid cooling channel is connected in series to penetrate through the first electrode plate, the coils and the second electrode plate, and in a working state, external liquid cooling equipment can be directly butted to dissipate heat and cool the first electrode plate, the coils and the second electrode plate, so that the service life is prolonged.
4. The first electrode plate and the second electrode plate are assembled together in an insulating and isolating mode, so that the compactness and the stability of the device can be improved, the integral installation and the disassembly are convenient, and the ordinary maintenance work is simplified.
Drawings
FIG. 1 is an exploded view of the preferred embodiment of the present invention;
FIG. 2 is an assembled view of FIG. 1;
FIG. 3 is a plan cross-sectional view of the coil body of FIG. 1;
FIG. 4 is an exploded view of the electrode assembly of FIG. 1;
FIG. 5 is another view of FIG. 4;
FIG. 6 is an assembled cross-sectional view of the electrode assembly, the spacing connection post assembly, the conductive strips, and the hold-down assembly of FIG. 2;
FIG. 7 is a top view of the electrode assembly of FIG. 1;
FIG. 8 is a cross-sectional view A-A of FIG. 7;
FIG. 9 is a cross-sectional view B-B of FIG. 7;
fig. 10 is an exploded view of the second electrode plate of fig. 4.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-coil body, 2-insulating base, 3-insulating connecting block, 4-electrode assembly, 5-limiting connecting column assembly, 6-conducting strip, 7-pressing assembly, 11-14-first-fourth coil, 101-103-first-third connecting line, 1 a-coil liquid cooling channel, 1 b-coil cooling liquid inlet, 1 c-coil cooling liquid outlet, 41-first electrode plate, 42-second electrode plate, 43-insulating plate, 411-first electrode cooling liquid inlet, 412-first electrode interface plate, 413-first flange, 414-first connecting hole, 415-first electrode liquid cooling channel, 416-first electrode cooling liquid outlet, 421-second electrode cooling liquid outlet, 422-conducting pressing block, 423-guiding hole, 424-second electrode cooling liquid inlet, 425-second electrode interface board, 426-second flange, 427-second connecting hole, 428-second electrode liquid cooling channel, 51-insulating sleeve, 52-connecting column, 53-screw hole, 71-pressing block and 72-screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1-4, the utility model discloses a variable number of turns induction heating coil, its core structure includes: the coil comprises a coil body 1, an insulating base 2, an electrode assembly 4 and a conducting strip 6; the coil body 1 comprises n is more than or equal to 2 turns of coils with different diameters and n-1 connecting wires; the coils are arranged from inside to outside one by one and are named as the i-th coil from inside to outside in sequence, i is 1, 2, j, n, and j is more than or equal to 1 and less than or equal to n; each coil is provided with a notch, two ends of the notch are defined as a head end and a tail end respectively, and the tail end of the ith coil is connected with the head end of the (i + 1) th coil through an ith connecting wire, so that all the coils are sequentially connected in series from inside to outside through n-1 connecting wires; the insulating base 2 is used for fixing each coil so as to keep the relative position of each coil fixed; the electrode assembly 4 includes a first electrode plate 41 and a second electrode plate 42; the first electrode plate 41 is connected to the head end of the first coil 11; the second electrode plate 42 is located right above the tail ends of the j-th coil to the n-th coil, and a gap for inserting the conductive sheet 6 is reserved between the second electrode plate and the j-th coil to the n-th coil.
In a use state, the conducting strip 6 is inserted between the second electrode plate 42 and the kth coil according to the number k of coil turns required to be connected into the circuit, so that the second electrode plate 42 is conducted with the kth coil, the number of coil turns connected into the circuit is changed by changing the insertion position of the conducting strip 6, and the variable range of the number k of coil turns is j ≦ k ≦ n.
In the preferred embodiment of the present invention, n is 4, j is 2, and there are 4 coils, namely the first to fourth coils, which are numbered in sequence as 11 to 14, and there are 3 connecting wires, namely the first to third connecting wires, which are numbered in sequence as 101 to 103. The insertable positions of the conducting strip 6 are a second coil to a fourth coil, and the variable range of the number k of the coil turns is more than or equal to 2 and less than or equal to 4. It can be understood that the conditions of 2 ≦ n ≦ 4 and n > 4 are all similar to the preferred embodiment of the present invention, and the number of coils and the length of the second electrode plate 42 can be increased or decreased on the basis of the preferred embodiment in the design and manufacturing stage directly according to the actual experimental requirements, and the basic structure and the operation principle are not changed. The utility model discloses in, j, n have decided the adjustable range of coil turns.
Preferably, in order to better fix the electrode assembly 4 and the conductive sheet 6, as shown in fig. 1 and fig. 4 to 6, the present invention further comprises a spacing connection column assembly 5 and a pressing assembly 7; the limiting connecting column assembly 5 comprises at least two connecting columns 52, the connecting columns 52 are parallel to each other, and the bottom ends of the connecting columns are respectively fixed on different coils; the second electrode plate 42 is provided with a protruding conductive pressing block 422, the conductive pressing block 422 is provided with guide holes 423 corresponding to the number and positions of the connecting columns 52 one by one, the connecting columns 52 are correspondingly positioned in the guide holes 423 one by one, and the connecting columns 52 are made of insulating materials or insulating sleeves 51 are arranged between the connecting columns 52 and the guide holes 423; in the use state, the pressing component 7 and the connecting column 52 are matched to press the conductive pressing block 422 downwards, so that the conductive pressing block 422, the conductive sheet 6 and the appointed coil are in close contact.
Preferably, the tail ends of the j-th coil to the n-th coil are respectively provided with a connecting column 52, and in a use state, the pressing assembly 7 is installed on the connecting column 52 corresponding to the insertion position of the conducting strip 6, and directly presses the conducting strip 6 at the corresponding position. Because the connecting columns 52 mainly play a role in guiding and limiting, in other embodiments (not shown), the number of the connecting columns 52 can be other numbers, theoretically, at least one connecting column 52 can guide and limit the conductive pressing block 422, the pressing assembly 7 can press the conductive plate 6 as long as the pressing assembly 422 is pressed down, and the pressing assembly 7 is directly arranged right above the conductive plate 6 and has the best pressing effect. In addition, an insulating handle which can be detached, for example, in a threaded connection mode can be arranged on the conducting strip 6, and the conducting strip 6 can be taken and placed conveniently.
Preferably, as shown in fig. 1 and 6, the top end of the connecting column 52 is provided with a screw hole 53; the crimping assembly 7 comprises a pressing block 71 and a screw 72; when the conductive pressing block 71 is used, the screw 72 is matched with the screw hole 53 to install the pressing block 71 on the connecting column 52, so that the pressure of the pressing block 71 on the conductive pressing block 422 is adjusted. In this embodiment, the pressing block 71 and the screw 72 are separately manufactured, and a stepped hole is formed in the center of the pressing block 71 for the screw 72 to pass through and press down. In other embodiments (not shown), the pressing block 71 and the screw 72 may be directly formed integrally, or an external thread may be provided at the top end of the connecting column 52, and a threaded hole matching the external thread may be provided on the pressing block 7, in which case the screw 72 may be omitted.
Preferably, in order to improve the heat-dissipating ability of the coil and prolong the service life of the coil, a liquid cooling heat-dissipating channel can be designed for the coil so as to be connected with a liquid cooling radiator when in use, and the coil and the electrode are cooled. Specifically, as shown in fig. 4 to 10, in the present embodiment, the first electrode plate 41 is provided with a first electrode liquid cooling passage 415 inside, and the second electrode plate 42 is provided with a second electrode liquid cooling passage 428 inside; each coil and each connecting wire are of hollow tubular structures, and the hollow parts are connected in series to form a coil liquid cooling channel 1 a; the coil cooling liquid inlet 1b of the coil liquid cooling passage 1a is located at the head end of the first coil 11 and communicates with the first electrode cooling liquid outlet 416 of the first electrode liquid cooling passage 415, preferably, with an insulated pipe (not shown); the coil cooling liquid outlet 1c of the coil liquid cooling passage 1a is located at the tail end of the nth coil and is communicated with the second electrode cooling liquid inlet 424 of the second electrode liquid cooling passage 428 through an insulated pipe; the first electrode coolant inlet 411 of the first electrode liquid cooling passage 415 is for the inflow of coolant during operation, and the second electrode coolant outlet 421 of the second electrode liquid cooling passage 428 is for the outflow of coolant during operation.
In the present embodiment, since the conductive compact 422 is large in size, it is preferable that the present embodiment, as shown in fig. 10, sets the conductive compact 422 to a hollow configuration, and the second electrode liquid cooling passage 428 passes through the hollow portion of the conductive compact 422, thereby achieving sufficient heat dissipation of the entirety of the second electrode plate 422. As shown in fig. 8 and 10, the second electrode plate 42 is divided into a plurality of parts to be independently manufactured, and then welded and assembled.
In other embodiments, if the conductive compact 422 is not large in size or the requirement for heat dissipation and temperature reduction is not high, the conductive compact 422 may be made solid, and the second electrode liquid-cooling channel 428 may directly pass through one side, or other auxiliary heat dissipation measures may be further provided to enhance heat dissipation, such as heat dissipation fins.
In addition, in order to facilitate the overall disassembly or assembly, it is preferable that the electrode assembly 4 further include an insulating plate 43 and an insulating connection assembly; the insulating plate 43 is disposed between the first electrode plate 41 and the second electrode plate 42, and the three are fixed by an insulating connecting assembly, so that the first electrode plate 41 and the second electrode plate 42 are connected and fixed while maintaining insulation therebetween. The insulating connecting component has two structural forms of an insulating bolt (not shown) and an insulating connecting block 3 which can be used independently or simultaneously, and the embodiment is preferably used simultaneously, in particular:
the insulating plate 43, the first electrode plate 41 and the second electrode plate 42 are fixedly connected through insulating bolts; the first electrode plate 41 and the second electrode plate 42 are both fixedly connected with the insulating connection block 3 through a connection bolt, which may be an insulating bolt or a conductor.
The coil shape in this embodiment is preferably circular. In other embodiments (not shown), the shape of each coil may be any shape, such as a polygon, an ellipse, or the like, or may be a circle or a square, or may be an archimedean spiral directly formed by connecting each coil and the connecting wire in series. In addition, the coil and the connecting wire may also be integrally formed, for example, by casting or milling the lower half of the coil body with the channel (similar to the cross-sectional structure of fig. 3), and then sealing the upper part of the channel by welding, so as to obtain the integrally formed coil body 1 with the coil liquid cooling channel 1 a.
According to the above description, the conducting strip 6 of the present invention can be installed on different coils of the coil body as required, so as to connect different numbers of turns of coils into the circuit, thereby realizing the heating effect of different numbers of turns of induction coils. Furthermore, the utility model discloses there is not special requirement to the coil interval, the interval of specific coil design according to the experiment needs can.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A variable-turn number induction heating coil, characterized by comprising: the coil comprises a coil body (1), an insulating seat (2), an electrode assembly (4) and a conducting strip (6);
the coil main body (1) comprises n is more than or equal to 2 turns of coils with different diameters and n-1 connecting wires; the coils are arranged from inside to outside one by one and are named as the i-th coil from inside to outside in sequence, i is 1, 2, j, n, and j is more than or equal to 1 and less than or equal to n; each coil is provided with a notch, two ends of the notch are defined as a head end and a tail end respectively, and the tail end of the ith coil is connected with the head end of the (i + 1) th coil through an ith connecting wire, so that all the coils are sequentially connected in series from inside to outside through n-1 connecting wires;
the insulating seat (2) is used for fixing each coil so as to keep the relative position of each coil fixed;
the electrode assembly (4) comprises a first electrode plate (41) and a second electrode plate (42); the first electrode plate (41) is connected with the head end of the first coil (11); the second electrode plate (42) is positioned right above the tail ends of the j coil to the n coil, and gaps for inserting the conducting strips (6) are reserved between the second electrode plate and the j coil to the n coil;
in a use state, the number k of coil turns of the circuit is accessed according to needs, the conducting plate (6) is inserted between the second electrode plate (42) and the kth coil, so that the second electrode plate (42) is conducted with the kth coil, the number of coil turns of the circuit is changed by changing the inserting position of the conducting plate (6), and the variable range of the number k of coil turns is j ≦ k ≦ n.
2. A variable turn induction heating coil according to claim 1, characterized by further comprising a spacing connection post assembly (5) and a hold-down assembly (7);
the limiting connecting column assembly (5) comprises at least two connecting columns (52), the connecting columns (52) are parallel to each other, and the bottom ends of the connecting columns are respectively fixed on different coils;
the second electrode plate (42) is provided with a conductive pressing block (422) which is convexly arranged, the conductive pressing block (422) is provided with guide holes (423) which are in one-to-one correspondence with the number and the positions of the connecting columns (52), the connecting columns (52) are in one-to-one correspondence in the guide holes (423), and the connecting columns (52) are made of insulating materials or insulating sleeves (51) are arranged between the connecting columns (52) and the guide holes (423);
in a use state, the pressing component (7) is matched with the connecting column (52) to press the conductive pressing block (422) downwards so that the conductive pressing block (422), the conductive sheet (6) and the appointed coil are in close contact.
3. A variable number of turns induction heating coil according to claim 2, characterized in that the j-th to n-th coils are each provided with a connecting post (52) at their end, and in use the pressing member (7) is mounted on the connecting post (52) corresponding to the insertion position of the conductive sheet (6).
4. A variable number of turns induction heating coil according to claim 3, characterized in that the top end of the connection column (52) is provided with a screw hole (53); the pressing assembly (7) comprises a pressing block (71) and a screw (72); when the conductive pressing block (422) is used, the pressing block (71) is arranged on the connecting column (52) by matching the screw (72) with the screw hole (53) so as to adjust the pressure of the pressing block (71) on the conductive pressing block (422).
5. A variable number of turns induction heating coil according to claim 3, characterized in that the top end of the connection column (52) is provided with an external thread, and the pressing block (71) is provided with a threaded hole matching with the external thread.
6. The variable-turn induction heating coil as claimed in any one of claims 2 to 5, wherein the first electrode plate (41) is internally provided with a first electrode liquid cooling passage (415), and the second electrode plate (42) is internally provided with a second electrode liquid cooling passage (428); each coil and each connecting wire are of hollow tubular structures, and the hollow parts are connected in series to form a coil liquid cooling channel (1 a);
a coil cooling liquid inlet (1b) of the coil cooling channel (1a) is positioned at the head end of the first coil (11) and is communicated with a first electrode cooling liquid outlet (416) of the first electrode cooling channel (415); a coil cooling liquid outlet (1c) of the coil liquid cooling channel (1a) is positioned at the tail end of the nth coil and is communicated with a second electrode cooling liquid inlet (424) of a second electrode liquid cooling channel (428) through an insulating pipeline;
a first electrode cooling liquid inlet (411) of the first electrode cooling channel (415) is used for allowing cooling liquid to flow in during operation, and a second electrode cooling liquid outlet (421) of the second electrode cooling channel (428) is used for allowing cooling liquid to flow out during operation.
7. The variable-turn induction heating coil as claimed in claim 6, wherein the conductive compact (422) is of a hollow construction, and the second electrode liquid cooling passage (428) passes through a hollow portion of the conductive compact (422).
8. A variable-turn number induction heating coil according to any one of claims 1 to 5, wherein the electrode assembly (4) further comprises an insulating plate (43) and an insulating connecting member; the insulating plate (43) is arranged between the first electrode plate (41) and the second electrode plate (42), and the insulating plate, the insulating plate and the second electrode plate are fixed through an insulating connecting assembly.
9. Variable-turn induction heating coil according to claim 7, characterized in that the insulating connection assembly comprises insulating bolts and/or insulating connection blocks (3); the insulating plate (43), the first electrode plate (41) and the second electrode plate (42) are fixedly connected through insulating bolts; the first electrode plate (41) and the second electrode plate (42) are both fixedly connected with the insulating connecting block (3).
10. A variable-turn induction heating coil according to any one of claims 1 to 5, wherein each coil is circular or square in shape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920814675.8U CN210986487U (en) | 2019-05-31 | 2019-05-31 | Variable-turn number induction heating coil |
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| CN201920814675.8U CN210986487U (en) | 2019-05-31 | 2019-05-31 | Variable-turn number induction heating coil |
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| CN210986487U true CN210986487U (en) | 2020-07-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110139415A (en) * | 2019-05-31 | 2019-08-16 | 华中科技大学 | The variable circle number load coil of one kind |
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2019
- 2019-05-31 CN CN201920814675.8U patent/CN210986487U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110139415A (en) * | 2019-05-31 | 2019-08-16 | 华中科技大学 | The variable circle number load coil of one kind |
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