CN109166709B - Coil, wireless power transmitter and receiver, near field communicator, and electronic device - Google Patents
Coil, wireless power transmitter and receiver, near field communicator, and electronic device Download PDFInfo
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- CN109166709B CN109166709B CN201811033355.5A CN201811033355A CN109166709B CN 109166709 B CN109166709 B CN 109166709B CN 201811033355 A CN201811033355 A CN 201811033355A CN 109166709 B CN109166709 B CN 109166709B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
Abstract
The invention discloses a coil device, which mainly comprises: a plate; a first coil pattern formed on the first surface of the board, an inner area of the first coil pattern including a plurality of first conductive patterns; a second coil pattern formed on a second surface of the board; and a third coil pattern formed on the second surface of the board; wherein, part of the first conductive patterns terminate the extension before the rest of the first conductive patterns; the end of the first conductive pattern terminating the extension and the third coil pattern are electrically connected; the ends of the remaining first conductive patterns that do not terminate in extension are electrically connected with the inner ends of the second coil patterns; the third coil pattern corresponds to the remaining first conductive pattern that is not terminated with an extension, and the third coil pattern extends to be electrically connected with the inner end of the second coil pattern. The coil device provided by the invention can adapt the inductance and the inner diameter size and/or the inductance and the outer diameter size of the coil device.
Description
Technical Field
The invention belongs to the field of coil structure design, and particularly relates to a coil device, a wireless power transmitter and receiver, a near field communicator and electronic equipment.
Background
Induction coils are increasingly commonly used in electronic devices, especially in some new applications, such as near Field communication (nfc), wireless charging, etc.
In practical applications, the inner diameter and the outer diameter of the coil are mostly fixed, for example, in order to adapt to an existing mobile terminal with a wireless charging function, the size of the coil in the wireless charger needs to be matched with the size of the coil in the mobile terminal, and the coil often needs to reach a target inductance value to be able to realize effective energy transmission.
The current practice of coils in the industry is to adopt a double-layer series connection mode or a double-layer parallel connection mode, and the ends of coil wires of all layers are integrally and directly connected in any mode. This configuration results in coil inductance that is difficult to achieve target values, either too high or too low, or either too large or too small an outer or inner diameter.
Disclosure of Invention
An object of the present invention is to provide a coil device, a wireless power transmitter and receiver, a near field communicator, and an electronic apparatus, which are configured to be able to adapt the inductance and the inner diameter size and/or the inductance and the outer diameter size of the coil device.
In order to solve the problems, the technical scheme of the invention is as follows:
a coil device comprising:
a plate;
a first coil pattern formed on a first surface of the board, an inner area of the first coil pattern including a plurality of first conductive patterns;
a second coil pattern formed on a second surface of the board; and
a third coil pattern formed on the second surface of the board;
wherein the content of the first and second substances,
a part of the first conductive patterns terminate extending before the rest of the first conductive patterns;
the end of the first conductive pattern that terminates the extension and the third coil pattern are electrically connected;
the ends of the remaining first conductive patterns that do not terminate in extension are electrically connected with the inner ends of the second coil patterns;
the third coil pattern corresponds to the remaining first conductive pattern that is not terminated with an extension, and the third coil pattern is extended to be electrically connected with an inner end of the second coil pattern.
According to an embodiment of the present invention, the third coil pattern corresponds to the remaining first conductive pattern of the non-terminated extension means that the routing direction of the third coil pattern and the routing direction of the remaining first conductive pattern of the non-terminated extension are identical, and the position of the third coil pattern on the second surface of the board and the position of the remaining first conductive pattern of the non-terminated extension on the first surface of the board correspond.
According to an embodiment of the present invention, the extension of the portion of the first conductive pattern is terminated, and the portion of the first conductive pattern is not extended to the inner side of the first coil pattern, and at least the remaining portion of the first conductive pattern may be extended to the inner end of the first coil pattern and the inner end of the second coil pattern.
According to an embodiment of the present invention, an off position of the first conductive pattern terminating the extension is not advanced by a half turn position of a next inner turn of the first coil pattern;
and the secondary inner circle of the first coil pattern is a circle of coil patterns which are directly connected with the innermost coil pattern of the first coil pattern on the first coil pattern.
According to an embodiment of the invention, the first surface of the plate comprises a first relief area;
the first notch region includes at least one first notch portion, the first notch portion is disposed on the first coil pattern, and the at least one first notch portion extends to an inner side of the first coil pattern along a length direction of the first coil pattern to form the plurality of first conductive patterns in an inner region of the first coil pattern.
According to an embodiment of the present invention, the second pattern further includes a second via area and a second gap area;
the second cutout region includes at least one second cutout portion disposed on the second coil pattern, the at least one second cutout portion extending along a length direction of the second coil pattern to divide the second coil pattern into a plurality of second conductive patterns in the second cutout region.
According to an embodiment of the present invention, the first notch area includes three first notch portions, the three first notch portions divide the first coil pattern into four first conductive patterns, and along a direction from an inner side to an outer side of the first coil pattern, the four first conductive patterns are respectively marked as a first coil pattern first trace, a first coil pattern second trace, a first coil pattern third trace, and a first coil pattern fourth trace;
the second notch area comprises three second notch portions, the three second notch portions divide the second coil pattern into four second conductive patterns, and the four second conductive patterns are respectively marked as a first second coil pattern routing line, a second coil pattern routing line, a third second coil pattern routing line and a fourth second coil pattern routing line along the direction from the inner side to the outer side of the second coil pattern;
the third coil pattern comprises two third conductive patterns, and the two third conductive patterns are respectively marked as a third coil pattern first routing and a third coil pattern second routing along the direction from the inner side to the outer side of the third coil pattern;
the first coil pattern first trace and the first coil pattern second trace are interrupted before extending to the inner loop of the first coil pattern,
the tail end of the first coil pattern first wire is electrically connected with the starting end of the third coil pattern second wire through the first sub-passage unit, and the tail end of the first coil pattern second wire is electrically connected with the starting end of the third coil pattern first wire through the first sub-passage unit;
the tail end of the first coil pattern third wire is electrically connected with the tail end of the inner ring of the second coil pattern second wire through the second sub-passage unit, and the tail end of the first coil pattern fourth wire is electrically connected with the tail end of the inner ring of the second coil pattern first wire through the first sub-passage unit;
the tail end of the first wire of the third coil pattern is electrically connected with the tail end of the inner ring of the third wire of the second coil pattern, and the tail end of the second wire of the third coil pattern is electrically connected with the tail end of the inner ring of the fourth wire of the second coil pattern.
According to an embodiment of the present invention, a width W of each of the first conductive patterns1The following relation is satisfied:
W1≤3d1；
wherein d is1Is the skin depth of the first conductive pattern at the operating frequency of the coil device; f is the operating frequency of the coil arrangement; mu.s1A magnetic permeability of the first conductive pattern;
is the conductivity of the first conductive pattern.
According to an embodiment of the present invention, each of the second conductive patterns has a width W2The following relation is satisfied:
W2≤3d2；
wherein d is2Is the skin depth of the second conductive pattern at the operating frequency of the coil device; f is the operating frequency of the coil arrangement; mu.s2A magnetic permeability of the second conductive pattern;
is the conductivity of the second conductive pattern.
According to an embodiment of the present invention, a non-conductive medium for avoiding electrical connection between adjacent first conductive patterns is disposed between adjacent first conductive patterns.
According to an embodiment of the present invention, a non-conductive medium for avoiding electrical connection between adjacent second conductive patterns is disposed between the adjacent second conductive patterns.
The present invention also provides a wireless power transmitter including:
a power transmitting coil part for wirelessly transmitting power; and
a power supply unit that supplies power to the power transmission coil unit;
wherein the content of the first and second substances,
the power transmitting coil part includes the coil device according to any one of the above embodiments.
The present invention also provides a wireless power receiver including:
a power receiving coil part to receive the wireless power; and
a power transfer unit that transfers the wireless power received by the power receiving coil unit to a power consumer;
wherein the content of the first and second substances,
the power receiving coil portion includes the coil device according to any one of the above embodiments.
The invention also provides a near field communicator which comprises the coil device in any one of the embodiments.
The present invention also provides an electronic device including the wireless power transmitter in the above embodiment to have a wireless power transmitting function; and/or
The wireless power receiver in the above embodiment is included to have a wireless power receiving function; and/or
The near field communicator in the above embodiment is included to have a near field communication function.
Based on the same inventive concept, the present invention also provides a coil device, comprising:
a plurality of first conductive patterns of a first layer; and
coil patterns of other layers;
wherein the content of the first and second substances,
and the extension of part of the first conductive patterns is terminated before the rest of the first conductive patterns, and the extended first conductive patterns are connected to the coil patterns of other layers so as to increase the adjustment factor of the inductance of the coil device, adapt the inductance of the coil device to the inner diameter size of the coil device and/or adapt the inductance of the coil device to the outer diameter size of the coil device.
Based on the same inventive concept, the present invention also provides a coil device, comprising:
a plate;
a first coil pattern formed on a first surface of the board;
a second coil pattern formed on a second surface of the board; and
a third coil pattern formed on the second surface of the board;
the conductive pattern in the inner area of the first coil pattern extends to the position of the tail end of the first coil pattern and is electrically connected with the tail end of the inner side of the second coil pattern; and the conductive pattern is electrically connected to the third coil pattern at a position before extending to an end of the first coil pattern;
the third coil pattern corresponds to the conductive pattern at a first position to an end position of the first coil pattern, the first position being a position where the conductive pattern and the third coil pattern are electrically connected; and the third coil pattern extends to be electrically connected to an inner end of the second coil pattern.
According to an embodiment of the present invention, the third coil pattern corresponds to the conductive pattern from the first position to the end position of the first coil pattern means that the routing direction of the third coil pattern coincides with the routing direction of the conductive pattern from the first position to the end position of the first coil pattern, and the position of the third coil pattern on the second surface of the board corresponds to the position of the conductive pattern from the first position to the end position of the first coil pattern on the first surface of the board.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
a coil device provided by an embodiment of the present invention is provided with a plurality of first conductive patterns, and a part of the first conductive patterns terminate the extension prior to the remaining first conductive patterns, and thereafter the end of the first conductive pattern terminating the extension is electrically connected to the third coil pattern; the third coil pattern corresponds to the remaining first conductive patterns that are not terminated to extend, and the third coil pattern extends to be electrically connected to the inner end of the second coil pattern; the third coil pattern is connected to the third coil pattern in another layer through a special routing mode in the first coil pattern, so that the inductance adjustable factor of the coil device is increased, and the inductance and the inner diameter size and/or the inductance and the outer diameter size of the coil device can be adapted through adjusting the third coil pattern.
Drawings
Fig. 1 is a partial structural view of a coil device according to the present invention (with a first coil pattern on top);
FIG. 2 is a top view of a second coil pattern of the coil apparatus shown in FIG. 1;
fig. 3 is a partially enlarged view of the coil device shown in fig. 1 at the inner ring connecting position;
FIG. 4 is a diagram of a first pattern of the coil arrangement shown in FIG. 1;
fig. 5 is a diagram of a second pattern and a third pattern of the coil device shown in fig. 1.
Description of reference numerals:
1: a first coil pattern;
101: a first coil pattern first trace; 102: a first coil pattern second trace; 103: a third trace of the first coil pattern; 104: a first coil pattern fourth trace;
2: a second coil pattern;
201: a second coil pattern first trace; 202: a second coil pattern second trace; 203: a second coil pattern third wiring; 204: a second coil pattern fourth wire;
3: a third coil pattern;
301: a third coil pattern first trace; 302: a third coil pattern second trace;
4: a first via area;
401: a first sub-path unit; 402: a second sub-path unit;
5: a first notch region;
501: a first notch portion;
6: a second via area;
601: a second via area.
Detailed Description
A coil device, a wireless power transmitter and receiver, a near field communicator and an electronic device according to the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims.
Referring to fig. 1, 2, 3, 4 and 5, a coil device includes: a plate (not shown in the figures); a first coil pattern 1 formed on a first surface of the board, an inner area of the first coil pattern 1 including a plurality of first conductive patterns; a second coil pattern 2 formed on a second surface of the board; and a third coil pattern 3 formed on the second surface of the board; wherein, part of the first conductive patterns terminate the extension before the rest of the first conductive patterns; the end of the first conductive pattern terminating the extension and the third coil pattern 3 are electrically connected; the ends of the remaining first conductive patterns that do not terminate in extension are electrically connected to the inner ends of the second coil patterns 2; the third coil pattern 3 corresponds to the remaining first conductive pattern that is not terminated with an extension, and the third coil pattern 3 is extended to be electrically connected with the inner end of the second coil pattern 2.
Specifically, the third coil pattern 3 corresponds to the remaining first conductive patterns that have not terminated the extension means that the routing direction of the third coil pattern 3 coincides with the routing direction of the remaining first conductive patterns that have not terminated the extension, and the position of the third coil pattern 3 on the second surface of the board corresponds to the position of the remaining first conductive patterns that have not terminated the extension on the first surface of the board.
In particular, the first surface of the plate comprises a first notched area 5; the first notched area 5 includes at least one first notched portion 501, the first notched portion 501 is disposed on the first coil pattern 1, and the at least one first notched portion 501 extends to the inner side of the first coil pattern 1 along the length direction of the first coil pattern 1 to form a plurality of first conductive patterns in the inner area of the first coil pattern 1.
Specifically, the first surface of the board includes a first via region 4, and the first sub-via unit 401 in the first via region 4 electrically connects the inner end of the first conductive pattern, which terminates the extension, and the third coil pattern 3; the second sub-via unit 402 in the first via region 4 electrically connects the inner ends of the remaining first conductive patterns, which are not terminated to extend, and the inner ends of the second coil patterns 2.
The coil device provided by the embodiment is connected to the third coil pattern 3 in another layer through a special routing mode in the first coil pattern 1, the third coil pattern 3 is added, that is, the inductance adjustable factor of the coil device is increased, the inductance of the coil device can be adapted to the inner diameter size and the outer diameter size through adjusting the third coil pattern 3, and the energy transmission efficiency of the coil is improved.
Specifically, the board may be an insulating layer, the first conductive pattern is a coil trace, the first notch region 5 is a region having the first conductive pattern and a groove or a gap on the first coil pattern 1, and the first notch portion 501 is a starting position of the groove or the gap.
At least two coil wires are arranged on the inner side of the first coil pattern 1, part of the wires are extended before the rest of the wires are extended, the extension of the part of the wires is that the part of the wires is cut off and does not extend towards the inner side of the first coil pattern 1, and at least the rest of the wires can extend to the inner side end of the first coil pattern 1 to be electrically connected with the inner side end of the second coil pattern 2.
Preferably, the termination position of the trace terminating the extension is not advanced from the position of the second inner turn of the first coil pattern 1 by a half turn; wherein, the second inner circle of the first coil pattern 1 is a circle of coil patterns on the first coil pattern 1 directly connected with the innermost coil pattern of the first coil pattern 1. In other words, terminating the extended coil trace requires a cut-off at a position halfway the second inner turn of the first coil pattern 1 and a position thereafter.
Specifically, the coil trace terminated to extend is connected to the third coil pattern 3 on the second surface of the board through the conductive hole, and the coil trace in the third coil pattern 3 may be directly below the inner loop trace of the first coil pattern 1 or may be offset. After which the third coil pattern 3 is electrically connected to the end of the inner turn of the second coil pattern 2 on the second surface of the board. Likewise, the ends of the coil traces that continue to be wound inside the first coil pattern 1 are also connected to the second surface of the board through the conductive holes, and are also electrically connected to the ends of the inner turns of the second coil pattern 2.
The above is only one embodiment, and based on the above more basic embodiment, the coil device provided by the present invention can have many expanded embodiments.
In an expanded embodiment, the trace in the first coil pattern 1 may be more than two, for example, there may be four traces in the case of having three first notch portions 501, one of the traces may be interrupted in advance, and the other three traces are wound to the inner ring; or three of the wires are interrupted in advance, and the rest wire is wound to the inner ring; or two of the wires can be interrupted in advance, and the rest two wires are wound to the inner ring.
Further, the third coil pattern 3 may be a wire, and the width of the wire may be the width of one of the wires in the first coil pattern 1, or the width of a plurality of wires and their gaps together.
By way of illustration (but not exclusively), the traces in the first coil pattern 1 have four strands, two of which are interrupted in advance, and the remaining two strands are wound to the inner ring; the third coil pattern 3 has two traces, the two traces interrupted in advance in the first coil layer are electrically connected with the two traces in the third coil pattern 3, and each trace in the third coil layer is located below the two traces of the inner ring in the first coil layer. Of course, as a variation, the third coil pattern 3 may have only one trace, and both of the two coils in the first coil layer are electrically connected to the trace by breaking in advance; as a variant, the two tracks of the inner loop in the first coil layer may be merged into one track.
The second coil pattern 2 can have a plurality of traces, and four traces are first exemplified, and it is still assumed that the traces in the first coil pattern 1 have four traces and the third coil pattern 3 has two traces. The method comprises the following specific steps:
the two wires of the third coil pattern 3 are electrically connected with the inner end parts of the two wires of the second coil pattern 2 respectively; two inner-loop wires in the first coil pattern 1 are electrically connected with the inner ends of the other two inner-loop wires in the second coil pattern 2.
As a variation, the second coil pattern 2 may be a single wire, and both the two wires of the third coil pattern 3 and the two wires of the inner loop in the first coil pattern 1 are electrically connected to the inner side end of the single wire.
As a variation, the second coil pattern 2 may be two wires, and one of the two wires may be a combination of two or three of the four wires in the second coil pattern 2.
Further, the first coil pattern 1 may be provided with not only a plurality of strands of wirings at the inner side but also a plurality of strands of wirings at the outer side or the middle side (middle coil).
Besides the above-described extended embodiments, the embodiments of the present invention may also be some combinations of the above-described extended embodiments. Of course, the coil arrangement of the present invention can also be extended to two sheets three-layer, two sheets four-layer, etc.
It is understood that, in order to suppress the skin effect of the coil, the width W of each first conductive pattern (coil trace) is1The following relation is satisfied:
W1≤3d1；
wherein d is1Is the skin depth of the first conductive pattern at the operating frequency of the coil arrangement; f is the operating frequency of the coil device; mu.s1Magnetic permeability of the first conductive pattern;
the conductivity of the first conductive pattern.
The width of the first conductive pattern may also be extended to the second coil pattern 2 as well as the third coil pattern 3.
Further, a non-conductive medium for avoiding the electrical connection of the adjacent first conductive patterns is provided between the adjacent first conductive patterns. It will be appreciated that the non-conductive medium may also extend to the second coil pattern 2 as well as to the third coil pattern 3.
An embodiment of the present invention of a coil apparatus with reverse coil sequence is described below, and through simulation, the Q value of the coil apparatus with reverse coil sequence is higher. The method comprises the following specific steps:
the first notch area 5 in this embodiment includes three first notch portions 501, the three first notch portions 501 divide the first coil pattern 1 into four first conductive patterns, and along the direction from the inner side to the outer side of the first coil pattern 1, the four first conductive patterns are respectively marked as a first coil pattern first trace 101, a first coil pattern second trace 102, a first coil pattern third trace 103, and a first coil pattern fourth trace 104;
the second notch area 6 includes three second notch portions 601, the three second notch portions 601 divide the second coil pattern 2 into four second conductive patterns, and the four second conductive patterns are respectively marked as a second coil pattern first trace 201, a second coil pattern second trace 202, a second coil pattern third trace 203 and a second coil pattern fourth trace 204 along a direction from the inner side to the outer side of the second coil pattern 2;
the third coil pattern 3 includes two third conductive patterns, which are respectively denoted as a third coil pattern first trace 301 and a third coil pattern second trace 302 along a direction from the inside to the outside of the third coil pattern 3;
the first coil pattern first trace 101 and the first coil pattern second trace 102 are interrupted before extending to the inner loop of the first coil pattern 1,
the end of the first coil pattern first trace 101 is electrically connected to the beginning of the third coil pattern second trace 302 through the first sub-via unit 401, and the end of the first coil pattern second trace 102 is electrically connected to the beginning of the third coil pattern first trace 301 through the first sub-via unit 401;
the end of the first coil pattern third trace 103 is electrically connected to the end of the inner loop of the second coil pattern second trace 202 through the second sub-via unit 402, and the end of the first coil pattern fourth trace 104 is electrically connected to the end of the inner loop of the second coil pattern first trace 201 through the first sub-via unit 401;
the end of the third coil pattern first trace 301 is electrically connected to the end of the inner loop of the second coil pattern third trace 203 and the end of the third coil pattern second trace 302 is electrically connected to the end of the inner loop of the second coil pattern fourth trace 204.
According to the above description with reference to fig. 1, fig. 2 and fig. 3, it can be understood that the second coil pattern first trace 201 corresponds to the first coil pattern fourth trace 104; the second coil pattern second trace 202 corresponds to the first coil pattern third trace 103; the second coil pattern third trace 203 corresponds to the first coil pattern second trace 102; the second coil pattern fourth trace 204 corresponds to the first coil pattern first trace 101.
The line sequence in the first coil pattern 1 is that a first coil pattern first trace 101- > a first coil pattern second trace 102- > a first coil pattern third trace 103- > a first coil pattern fourth trace 104 from the inner side to the outer side; when the second coil pattern 2 is formed, the above-mentioned sequence is reversed to form the fourth trace 104- > the third trace 103- > the second trace 102- > the first trace 101. Through simulation, the design mode of completely reversing the line sequence can improve the Q value of the coil device.
Based on the same inventive concept, the present invention also provides a wireless power transmitter, including: a power transmitting coil part for wirelessly transmitting power; and a power supply section that supplies power to the power transmission coil section; wherein the power transmitting coil part includes the coil device of any one of the above embodiments.
Based on the same inventive concept, the present invention also provides a wireless power receiver, including: a power receiving coil part to receive wireless power; and a power switching unit that switches the wireless power received by the power receiving coil unit to the electric device; wherein the power receiving coil part includes the coil device in any one of the above embodiments.
Based on the same inventive concept, the invention further provides a near field communicator, which comprises the coil device in any one of the embodiments.
Based on the same inventive concept, the present invention also provides an electronic device including the wireless power transmitter in the above embodiments to have a wireless power transmitting function; and/or includes the wireless power receiver in the above embodiments to have a wireless power receiving function; and/or including the near field communicator of the above embodiments to have a near field communication function.
Based on the same inventive concept, the present invention also provides a coil device, comprising: a plurality of first conductive patterns of a first layer; and coil patterns of other layers; wherein, some first conductive patterns terminate to extend before the rest first conductive patterns, and the first conductive patterns terminating to extend are connected to the coil patterns of other layers to increase the adjustment factor of the inductance of the coil device, so that the inductance of the coil device is adapted to the inner diameter size of the coil device and/or the inductance of the coil device is adapted to the outer diameter size of the coil device.
Based on the same inventive concept, the present invention also provides a coil device, comprising: a plate; a first coil pattern formed on a first surface of the board; a second coil pattern formed on a second surface of the board; and a third coil pattern formed on the second surface of the board; the conductive pattern in the inner area of the first coil pattern extends to the position of the tail end of the first coil pattern and is electrically connected with the tail end of the inner side of the second coil pattern; and the conductive pattern is electrically connected to the third coil pattern at a position before extending to the end of the first coil pattern; the third coil pattern corresponds to the conductive pattern at a first position to a position of an end of the first coil pattern, the first position being a position where the conductive pattern and the third coil pattern are electrically connected; and the third coil pattern extends to be electrically connected to an inner end of the second coil pattern. The present embodiment adds a third coil pattern, that is, an inductance-adjustable factor of the coil device, and the inductance and the inner diameter size and/or the inductance and the outer diameter size of the coil device can be adapted by adjusting the third coil pattern.
Specifically, the third coil pattern corresponds to the conductive pattern from the first position to the end position of the first coil pattern means that the running direction of the third coil pattern coincides with the running direction of the conductive pattern from the first position to the end position of the first coil pattern, and the position of the third coil pattern on the second surface of the board corresponds to the position of the conductive pattern from the first position to the end position of the first coil pattern on the first surface of the board.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (13)
1. A coil device, comprising:
a plate;
a first coil pattern formed on a first surface of the board, an inner area of the first coil pattern including a plurality of first conductive patterns;
a second coil pattern formed on a second surface of the board; and
a third coil pattern formed on the second surface of the board;
wherein the content of the first and second substances,
a part of the first conductive patterns terminate extending before the rest of the first conductive patterns; the end of the first conductive pattern that terminates the extension and the third coil pattern are electrically connected;
the ends of the remaining first conductive patterns that do not terminate in extension are electrically connected with the inner ends of the second coil patterns;
the third coil pattern corresponds to the remaining first conductive pattern not terminating the extension, and the third coil pattern extends to be electrically connected to the inner end of the second coil pattern;
wherein the third coil pattern corresponds to the rest of the first conductive patterns which are not terminated to extend, that is, the routing direction of the third coil pattern is consistent with the routing direction of the rest of the first conductive patterns which are not terminated to extend, and the position of the third coil pattern on the second surface of the board corresponds to the position of the rest of the first conductive patterns which are not terminated to extend on the first surface of the board;
wherein, the extension of part of the first conductive pattern is terminated, that is, the part of the first conductive pattern is cut off and does not extend to the inner side of the first coil pattern any more, and at least the rest part of the first conductive pattern can extend to the inner side end of the first coil pattern and the inner side end of the second coil pattern to be electrically connected;
wherein an off position of the first conductive pattern terminating the extension is not advanced by a half turn position of a next inner turn of the first coil pattern;
and the secondary inner circle of the first coil pattern is a circle of coil patterns which are directly connected with the innermost coil pattern of the first coil pattern on the first coil pattern.
2. The coil device of claim 1, wherein the first surface of the plate includes a first notched area;
the first notch region includes at least one first notch portion, the first notch portion is disposed on the first coil pattern, and the at least one first notch portion extends to an inner side of the first coil pattern along a length direction of the first coil pattern to form the plurality of first conductive patterns in an inner region of the first coil pattern.
3. The coil device of claim 2, wherein the second surface further comprises a second via area and a second cutout area;
the second cutout region includes at least one second cutout portion disposed on the second coil pattern, the at least one second cutout portion extending along a length direction of the second coil pattern to divide the second coil pattern into a plurality of second conductive patterns in the second cutout region.
4. The coil device according to claim 3, wherein the first gap area includes three first gap portions, the three first gap portions dividing the first coil pattern into four first conductive patterns, and along a direction from inside to outside of the first coil pattern, the four first conductive patterns are respectively denoted as a first coil pattern first trace, a first coil pattern second trace, a first coil pattern third trace, and a first coil pattern fourth trace;
the second notch area comprises three second notch portions, the three second notch portions divide the second coil pattern into four second conductive patterns, and the four second conductive patterns are respectively marked as a first second coil pattern routing line, a second coil pattern routing line, a third second coil pattern routing line and a fourth second coil pattern routing line along the direction from the inner side to the outer side of the second coil pattern;
the third coil pattern comprises two third conductive patterns, and the two third conductive patterns are respectively marked as a third coil pattern first routing and a third coil pattern second routing along the direction from the inner side to the outer side of the third coil pattern;
the first coil pattern first trace and the first coil pattern second trace are interrupted before extending to an inner loop of the first coil pattern;
the tail end of the first coil pattern first wire is electrically connected with the starting end of the third coil pattern second wire through a first sub-passage unit, and the tail end of the first coil pattern second wire is electrically connected with the starting end of the third coil pattern first wire through the first sub-passage unit;
the tail end of the third wire of the first coil pattern is electrically connected with the tail end of the inner ring of the second wire of the second coil pattern through a second sub-passage unit, and the tail end of the fourth wire of the first coil pattern is electrically connected with the tail end of the inner ring of the first wire of the second coil pattern through the first sub-passage unit;
the tail end of the first wire of the third coil pattern is electrically connected with the tail end of the inner ring of the third wire of the second coil pattern, and the tail end of the second wire of the third coil pattern is electrically connected with the tail end of the inner ring of the fourth wire of the second coil pattern.
5. The coil device according to claim 1, wherein a width W of each of the first conductive patterns1The following relation is satisfied:
W1≤3d1；
wherein d is1Is the skin depth of the first conductive pattern at the operating frequency of the coil device; f is the operating frequency of the coil arrangement; mu.s1A magnetic permeability of the first conductive pattern;
is the conductivity of the first conductive pattern.
6. The coil device according to claim 3, wherein a width W of each of the second conductive patterns2The following relation is satisfied:
W2≤3d2；
wherein d is2Is the skin depth of the second conductive pattern at the operating frequency of the coil device; f is the operating frequency of the coil arrangement; mu.s2A magnetic permeability of the second conductive pattern;
is the conductivity of the second conductive pattern.
7. The coil device according to claim 1, wherein a non-conductive medium for avoiding electrical connection between adjacent ones of the first conductive patterns is provided between adjacent ones of the first conductive patterns.
8. The coil device according to claim 3, wherein a non-conductive medium for avoiding electrical connection between adjacent ones of the second conductive patterns is provided between adjacent ones of the second conductive patterns.
9. A wireless power transmitter, comprising:
a power transmitting coil part for wirelessly transmitting power; and
a power supply unit that supplies power to the power transmission coil unit;
wherein the content of the first and second substances,
the power transmitting coil part includes the coil device according to any one of claims 1 to 8.
10. A wireless power receiver, comprising:
a power receiving coil part to receive the wireless power; and
a power transfer unit that transfers the wireless power received by the power receiving coil unit to a power consumer;
wherein the content of the first and second substances,
the power receiving coil section includes the coil device according to any one of claims 1 to 8.
11. A near field communicator comprising a coil arrangement according to any one of claims 1 to 8.
12. An electronic device, characterized by comprising the wireless power transmitter according to claim 9 to have a wireless power transmission function; and/or
Including the wireless power receiver of claim 10 to have a wireless power receiving function; and/or
Comprising a near field communicator according to claim 11 for near field communication functions.
13. A coil device, comprising:
a plate;
a first coil pattern formed on a first surface of the board;
a second coil pattern formed on a second surface of the board; and
a third coil pattern formed on the second surface of the board;
the conductive pattern in the inner area of the first coil pattern extends to the position of the tail end of the first coil pattern and is electrically connected with the tail end of the inner side of the second coil pattern; and the conductive pattern is electrically connected to the third coil pattern at a position before extending to an end of the first coil pattern;
the third coil pattern corresponds to the conductive pattern at a first position to an end position of the first coil pattern, the first position being a position where the conductive pattern and the third coil pattern are electrically connected; and the third coil pattern extends to be electrically connected with the inner end of the second coil pattern;
wherein the third coil pattern corresponds to the conductive pattern from the first position to the end position of the first coil pattern means that the routing direction of the third coil pattern is identical to the routing direction of the conductive pattern from the first position to the end position of the first coil pattern, and the position of the third coil pattern on the second surface of the board corresponds to the position of the conductive pattern from the first position to the end position of the first coil pattern on the first surface of the board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033355.5A CN109166709B (en) | 2018-09-05 | 2018-09-05 | Coil, wireless power transmitter and receiver, near field communicator, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033355.5A CN109166709B (en) | 2018-09-05 | 2018-09-05 | Coil, wireless power transmitter and receiver, near field communicator, and electronic device |
Publications (2)
| Publication Number | Publication Date |
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| CN109166709A CN109166709A (en) | 2019-01-08 |
| CN109166709B true CN109166709B (en) | 2021-10-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104246925A (en) * | 2012-02-20 | 2014-12-24 | 华为技术有限公司 | High current, low equivalent series resistance printed circuit board coil for power transfer application |
| CN106898474A (en) * | 2015-12-18 | 2017-06-27 | 三星电机株式会社 | Coil block |
| CN106952715A (en) * | 2016-01-07 | 2017-07-14 | 三星电机株式会社 | Coil substrate |
| CN107046333A (en) * | 2016-02-05 | 2017-08-15 | 三星电机株式会社 | Coil module and the wireless power receiver using the coil module |
| JP2017195707A (en) * | 2016-04-20 | 2017-10-26 | 株式会社リューテック | Wireless power supply device |
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2018
- 2018-09-05 CN CN201811033355.5A patent/CN109166709B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104246925A (en) * | 2012-02-20 | 2014-12-24 | 华为技术有限公司 | High current, low equivalent series resistance printed circuit board coil for power transfer application |
| CN106898474A (en) * | 2015-12-18 | 2017-06-27 | 三星电机株式会社 | Coil block |
| CN106952715A (en) * | 2016-01-07 | 2017-07-14 | 三星电机株式会社 | Coil substrate |
| CN107046333A (en) * | 2016-02-05 | 2017-08-15 | 三星电机株式会社 | Coil module and the wireless power receiver using the coil module |
| JP2017195707A (en) * | 2016-04-20 | 2017-10-26 | 株式会社リューテック | Wireless power supply device |
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| CN109166709A (en) | 2019-01-08 |
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