CN210403397U - Small-volume coil for high current - Google Patents
Small-volume coil for high current Download PDFInfo
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- CN210403397U CN210403397U CN201921408124.8U CN201921408124U CN210403397U CN 210403397 U CN210403397 U CN 210403397U CN 201921408124 U CN201921408124 U CN 201921408124U CN 210403397 U CN210403397 U CN 210403397U
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- copper sheet
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Abstract
The utility model discloses a little volume coil for heavy current, it includes multi-disc coil unit piece, the coil unit piece is by whole being helical structure and have one go up the connector and the flat copper sheet of connector down and wrap up in the flat copper sheet except that last connector and the connector other surface outside resistant high pressure and high temperature resistant insulating material constitute, multi-disc coil unit piece superposes along the spiral axis direction in proper order, and make the lower connector of the flat copper sheet that lies in the top among two adjacent coil unit pieces closely contact with the last connector of the flat copper sheet that lies in the below, and the last connector of the flat copper sheet that lies in the coil unit piece of the top and the lower connector of the flat copper sheet that lies in the coil unit piece of the bottom all are used for accessing circuit as the circuit port; the magnetic field intensity sensor has the advantages that the magnetic field intensity sensor can be used in a large-current occasion, is small in size and can greatly enhance the magnetic field intensity.
Description
Technical Field
The utility model relates to a coil especially relates to a little volume coil for heavy current.
Background
A coil is a component commonly used in the power or electronic industry. The coil is usually a wire winding in a ring shape, and common coil applications include motors, inductors, transformers, loop antennas, and the like. Generally, the wire used to wind the coil is a wire with a circular cross-section. If the coil is energized and the current is high, a large diameter of the wire is required. In the case of high current (e.g. greater than 40A, etc.), the diameter of the required wire tends to be relatively large, in which case the number of turns increases to obtain a sufficient magnetic field strength, resulting in a coil that is generally relatively large in volume, especially in height (or length).
However, as market demand changes, products are being made smaller and smaller. In a limited space, it is obviously not suitable to place coils of excessive volume. To solve such problems, it is necessary to develop a small-sized coil for a large current.
Disclosure of Invention
The utility model aims to solve the technical problem that a little volume coil for heavy current is provided, it can use under the heavy current occasion, and the volume is less to can strengthen magnetic field intensity by a wide margin.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a small volume coil for high current, characterized by: the coil unit chip is composed of a plurality of flat copper sheets which are integrally in a spiral structure and provided with an upper connector and a lower connector, and high-pressure-resistant and high-temperature-resistant insulating materials wrapping the surfaces of the flat copper sheets except the upper connector and the lower connector, wherein the coil unit chips are sequentially stacked along the direction of a spiral axis, the lower connector of the flat copper sheet positioned above the adjacent two coil unit chips is in close contact with the upper connector of the flat copper sheet positioned below the adjacent two coil unit chips, and the upper connector of the flat copper sheet positioned above the coil unit chip and the lower connector of the flat copper sheet positioned below the coil unit chip are used as circuit ports for being connected with a circuit.
The flat copper sheet is a semi-annular flat copper sheet which is of a semi-circle spiral structure integrally or an annular flat copper sheet which is of a whole circle spiral structure integrally or a multi-circle spiral structure integrally. In the actual design process, the flat copper sheet can be designed into a spiral structure with any radian.
The upper connector and the lower connector of the flat copper sheet are consistent in structure and are of stepped structures, bending structures, notch structures or arc structures. In the actual design process, the upper connecting port and the lower connecting port of the flat copper sheet can be designed into other structures.
The flat copper sheet is made of a pure copper material with a wide flow guide surface and a thin thickness.
The coil also comprises a magnetic core, wherein the magnetic core is arranged in a central inner hole of the coil formed by sequentially overlapping the plurality of coil unit slices along the direction of the spiral axis. A magnetic core is provided for enhancing the magnetic field strength.
The magnetic core is an iron core or a soft magnetic rod. Magnetic cores of other materials are all available.
The coil also comprises an insulating pipe frame for fixing and supporting the coil unit slices and the magnetic core.
Insulating pipe support by first horizontal annular insulating piece and with the insulating tube of coil center internal hole looks adaptation constitute, an axle end of insulating tube with the integrative setting of hole of first horizontal annular insulating piece, the insulating tube pass coil center hole and make the multi-disc the coil unit piece be located the top of first horizontal annular insulating piece, the magnetic core set up in the insulating tube in. The insulating pipe support of this kind of structure is simple structure not only, can fix and support coil unit piece and magnetic core moreover well.
The coil also includes a fixing member for pressing the coil unit pieces.
The fixed fittings be the horizontal annular insulating piece of a slice second, the horizontal annular insulating piece cover of second locate outside the insulating tube and press in lieing in the top the coil cell piece on, make all the coil cell piece compressed tightly in the horizontal annular insulating piece of second with first horizontal annular insulating piece between. The fixing fittings of this structure are generally used in cooperation with an insulating pipe frame.
Compared with the prior art, the utility model has the advantages of:
1) because the distribution of current in the conductor is uneven, the closer to the surface, the larger the current distribution, and under the condition of the same volume of the same material, compared with the wire with a circular section, the surface area of the flat copper sheet is larger, and the current capable of being carried is also larger, therefore, when the flat copper sheet needs to carry the current with the same size, the volume of the flat copper sheet is smaller than that of the wire with a circular section, namely, the coil has smaller volume under the condition of meeting the required magnetic field intensity.
2) The loop width of the flat copper sheet can be designed to be larger, so that the height of the stack can be reduced, and the coil can be applied to more limited small-space products.
3) The flat copper sheet adopted by the coil can bear large current and convert the large current into a magnetic field, so that the magnetic field intensity can be greatly enhanced.
4) The coil is formed by sequentially overlapping a plurality of identical coil unit pieces, and the winding process of the traditional coil is omitted, so that the process is simpler, and the production is more convenient.
Drawings
FIG. 1 is a schematic structural diagram of a coil according to a first embodiment;
FIG. 2 is a schematic structural diagram of a flat copper sheet in a coil according to the first embodiment;
FIG. 3 is a schematic structural diagram of a flat copper sheet in a coil according to a second embodiment;
FIG. 4 is a schematic structural diagram of a flat copper sheet in a coil according to a third embodiment;
FIG. 5 is a schematic structural diagram of upper and lower connection ports of a flat copper sheet in a coil according to a fourth embodiment;
FIG. 6 is a schematic structural diagram of upper and lower connection ports of a flat copper sheet in a coil according to the fifth embodiment;
FIG. 7 is a schematic structural diagram of upper and lower connection ports of a flat copper sheet in a coil according to a sixth embodiment;
FIG. 8 is a schematic sectional view showing the coil according to the seventh embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The first embodiment is as follows:
a small-volume coil for large current as shown in fig. 1 and 2 includes three coil unit sheets 1 and a magnetic core 2, wherein the coil unit sheet 1 is composed of a flat copper sheet 11 which is a spiral structure and has an upper connection port 12 and a lower connection port 13, and an insulation material 14 which is high-pressure resistant and high-temperature resistant and wraps the other surfaces of the flat copper sheet 11 except the upper connection port 12 and the lower connection port 13, the three coil unit sheets 1 are sequentially stacked along a spiral axis direction, the lower connection port 13 of the upper flat copper sheet 11 of the two adjacent coil unit sheets 1 is in close contact with the upper connection port 12 of the lower flat copper sheet 11, the upper connection port 12 of the flat copper sheet 11 of the uppermost coil unit sheet 1 and the lower connection port 13 of the flat copper sheet 11 of the lowermost coil unit sheet 1 are used as circuit ports for connecting circuits, the magnetic core 2 is arranged in a coil central inner hole 15 formed by sequentially overlapping the three coil unit slices 1 along the direction of the spiral axis so as to enhance the magnetic field intensity.
In the present embodiment, the flat copper sheet 11 is an annular flat copper sheet having a whole spiral structure; the upper connecting port 12 and the lower connecting port 13 of the flat copper sheet 11 are identical in structure and are in a step-shaped structure.
Example two:
the present embodiment provides a small-volume coil for large current, which has a structure substantially the same as that of the first embodiment, except that: as shown in fig. 3, the flat copper sheet 11 is a semi-annular flat copper sheet having a half-turn spiral structure as a whole.
Example three:
the present embodiment provides a small-volume coil for large current, which has a structure substantially the same as that of the coil in the first embodiment or the second embodiment, except that: as shown in fig. 4, the flat copper sheet 11 has a multi-turn spiral structure as a whole.
Example four:
the present embodiment proposes a small-volume coil for large current, which has a structure substantially the same as that of the coils of the above embodiments, except that: as shown in fig. 5, the upper connection port 12 and the lower connection port 13 of the flat copper sheet 11 are identical in structure and are both of a notch type structure.
Example five:
the present embodiment proposes a small-volume coil for large current, which has a structure substantially the same as that of the coils of the above embodiments, except that: as shown in fig. 6, the upper connection port 12 and the lower connection port 13 of the flat copper sheet 11 are identical in structure and are arc-shaped.
Example six:
the present embodiment proposes a small-volume coil for large current, which has a structure substantially the same as that of the coils of the above embodiments, except that: as shown in fig. 7, the upper connection port 12 and the lower connection port 13 of the flat copper sheet 11 are identical in structure and are both of a bent type.
Example seven:
the present embodiment proposes a small-volume coil for large current, which is further improved on the basis of the coils of the above embodiments, that is: as shown in fig. 8, the coil further includes an insulating pipe frame 3 for fixing and supporting the coil unit pieces 1 and the magnetic core 2, and a fixing fitting 4 for compressing the coil unit pieces 1, the insulating pipe frame 3 is composed of a first horizontal annular insulating sheet 31 and an insulating pipe 32 adapted to the coil central inner hole 15, one shaft end of the insulating pipe 32 is integrally disposed with the inner hole of the first horizontal annular insulating sheet 31, the insulating pipe 32 penetrates the coil central inner hole 15 and makes the plurality of coil unit pieces 1 located above the first horizontal annular insulating sheet 31, and the magnetic core 2 is disposed in the insulating pipe 32; the fixing member 4 is a second horizontal annular insulating sheet, which is sleeved outside the insulating tube 32 and pressed on the coil unit sheets 1 located at the top, so that all the coil unit sheets 1 are pressed between the second horizontal annular insulating sheet and the first horizontal annular insulating sheet 31.
The insulating pipe frame 3 and the fixing fittings 4 in this embodiment are not limited to the structures given above.
In the above embodiments, the flat copper sheet 11 is made of a pure copper material with a wide flow guide surface and a thin thickness; the magnetic core 2 is an iron core or a soft magnetic rod or a magnetic core made of other materials.
Claims (10)
1. A small volume coil for high current, characterized by: the coil unit chip is composed of a plurality of flat copper sheets which are integrally in a spiral structure and provided with an upper connector and a lower connector, and high-pressure-resistant and high-temperature-resistant insulating materials wrapping the surfaces of the flat copper sheets except the upper connector and the lower connector, wherein the coil unit chips are sequentially stacked along the direction of a spiral axis, the lower connector of the flat copper sheet positioned above the adjacent two coil unit chips is in close contact with the upper connector of the flat copper sheet positioned below the adjacent two coil unit chips, and the upper connector of the flat copper sheet positioned above the coil unit chip and the lower connector of the flat copper sheet positioned below the coil unit chip are used as circuit ports for being connected with a circuit.
2. A small-volume coil for high current according to claim 1, wherein: the flat copper sheet is a semi-annular flat copper sheet which is of a semi-circle spiral structure integrally or an annular flat copper sheet which is of a whole circle spiral structure integrally or a multi-circle spiral structure integrally.
3. A small-volume coil for high currents according to claim 1 or 2, characterized in that: the upper connector and the lower connector of the flat copper sheet are consistent in structure and are of stepped structures, bending structures, notch structures or arc structures.
4. A small-volume coil for high current according to claim 3, wherein: the flat copper sheet is made of a pure copper material with a wide flow guide surface and a thin thickness.
5. A small-volume coil for high current according to claim 1, wherein: the coil also comprises a magnetic core, wherein the magnetic core is arranged in a central inner hole of the coil formed by sequentially overlapping the plurality of coil unit slices along the direction of the spiral axis.
6. A small-volume coil for high currents according to claim 5, characterized in that: the magnetic core is an iron core or a soft magnetic rod.
7. A small-volume coil for high currents according to claim 5 or 6, characterized in that: the coil also comprises an insulating pipe frame for fixing and supporting the coil unit slices and the magnetic core.
8. A small-volume coil for high currents according to claim 7, characterized in that: insulating pipe support by first horizontal annular insulating piece and with the insulating tube of coil center internal hole looks adaptation constitute, an axle end of insulating tube with the integrative setting of hole of first horizontal annular insulating piece, the insulating tube pass coil center hole and make the multi-disc the coil unit piece be located the top of first horizontal annular insulating piece, the magnetic core set up in the insulating tube in.
9. A small-volume coil for high current according to claim 8, wherein: the coil also includes a fixing member for pressing the coil unit pieces.
10. A small-volume coil for high currents according to claim 9, characterized in that: the fixed fittings be the horizontal annular insulating piece of a slice second, the horizontal annular insulating piece cover of second locate outside the insulating tube and press in lieing in the top the coil cell piece on, make all the coil cell piece compressed tightly in the horizontal annular insulating piece of second with first horizontal annular insulating piece between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921408124.8U CN210403397U (en) | 2019-08-27 | 2019-08-27 | Small-volume coil for high current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921408124.8U CN210403397U (en) | 2019-08-27 | 2019-08-27 | Small-volume coil for high current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210403397U true CN210403397U (en) | 2020-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921408124.8U Active CN210403397U (en) | 2019-08-27 | 2019-08-27 | Small-volume coil for high current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210403397U (en) |
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2019
- 2019-08-27 CN CN201921408124.8U patent/CN210403397U/en active Active
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