JP2017005898A - Power transmission/reception inductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission/reception inductor in which, firstly, lead wire lead-out parts of conductors are positioned in a distributed manner, secondly, a sufficient tension can be applied during production and thirdly, the sufficient tension can be applied also in terms of reduction in stereoscopic crossing parts.SOLUTION: Power transmission/reception inductors (a power transmission coil or a power reception coil) 9 and 11 are used while being laid in a non-contact power supply apparatus which supplies power from a power transmission side to a power reception side while making a gap present based on mutual induction of electromagnetic induction. The inductors 9 and 11 have an annular structure in which a plurality of insulated and coated conductors 20 are wound in parallel in a spiral shape on the same plane. The plurality of conductors 20 are formed in a laying structure where the neighboring conductors are made escape insides or outsides so as not to be overlapped with each other for each of equal interval positions as many as the conductors. Lead-out parts 21 to lead wires 3 are positioned in a distributed manner while maintaining equal mutual intervals in different locations around a circumference of the annular structure.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power transmission / reception inductor. That is, the present invention relates to a power transmission / reception inductor that is used for wiring in a non-contact power supply apparatus that supplies power in a non-contact manner from a power transmission side such as a road surface to a power reception side of a vehicle or the like.

《Technical background》
For example, a non-contact power supply device (WPT) that wirelessly supplies power to an electric vehicle (EV) without mechanical contact such as a cable has been developed and put into practical use based on demand.
In this non-contact power feeding device, based on the mutual induction action of electromagnetic induction, from the power transmitting coil placed on the road surface or the like to the power receiving coil mounted on the vehicle or the like, about several tens mm to several hundred mm. Electric power is supplied while the air gap exists and the position corresponds to the proximity (see also FIG. 5 described later).

<Conventional technology>
In such a non-contact power feeding device, the power transmission / reception inductor (power transmission coil, power reception coil) used is a plurality of conductors wound in parallel on the same surface in a spiral shape so as to obtain a large allowable current and supply power. It is arranged in a ring structure.
Such power transmission inductors (power transmission coils) and power reception inductors (power reception coils) are required to have the same inductance. If the inductances of the plurality of conductors are not the same, the current becomes non-uniform, and the flux linkage between the power transmission side and the power reception side also becomes non-uniform.
The following Patent Document 1 and FIGS. 4 (2) and 4 (3) show conventional examples of such a power transmission / reception inductor 1, which have been developed and put into practical use in view of the above-described circumstances. 4 (2) is an example in which there are two conductors 2, and FIG. 4 (3) is an example in which there are three conductors 2. FIG.

The power transmission / reception inductor 1 of this conventional example has a wiring structure in which a plurality of conductive wires 2 wound in parallel are twisted in the middle. And in this wiring structure, since the positional relationship between the plurality of conducting wires 2 is sequentially crossed with the other conducting wires 2 one by one for each twisted portion A, the cross portion becomes three-dimensional and three-dimensional. It was.
That is, each of the power transmission / reception inductors 1 of this conventional example has a plurality of wound coils (2 ₁ and 2 _{2 in} the example of FIG. 4 (2), or FIG. 4 (3)). In this example, ₃ conductor wires 2 ₁ , 2 ₂ , and 2 ₃ ) were twisted at a constant pitch interval on the way. Then, for each twisted portion A, one wire is crossed with the other lead wire 2 and twisted so as to return to the original positional relationship by twisting the same number of times as the number of the lead wires 2 (twice or three times in the illustrated example). It was turned.
In the conventional example, the same inductance is aimed at by adopting the twisting technique for the power transmitting / receiving inductor 1 in this way. For a plurality of conducting wires 2, the lengths are made uniform by twisting, and the number of turns is made an integer, so that the inductance is made identical.

Japanese Patent No. 4356844

However, the following problems have been pointed out as problems with the conventional power transmission / reception inductor 1.
<First problem>
First, a problem has been pointed out that the lead-out portions 4 of the conductive wires 2 to the lead wires 3 are concentrated in one place.
That is, each conducting wire 2 of the power transmission / reception inductor (power transmission coil, power reception coil) 1 is connected to the circuit from the lead portion 4 via the lead wire 3. And each lead-out part 4 to the lead wire 3 is made to one place of the same position by equalizing the length of each conductor 2 and making the number of windings an integer for uniforming the flux linkage of each conductor 2. You will be concentrated.
Thus, since each lead wire 3 and the drawing | extracting part 4 concentrate, the bending operation | work and accommodation of the thick conducting wire 2 were not easy. Moreover, since each lead wire 3 is pushed and inserted through a narrow space of one through portion 6 formed on the side surface of the coil case 5 and an excessive force is applied, the operation is easy from this surface. There wasn't.
Furthermore, design difficulties have been pointed out, such as difficulty in the layout design of the accessory parts such as grommets, bushes, and grounds of the penetrating portion 6.
In particular, these problems have become prominent with respect to the small power transmission / reception inductor 1 having a diameter of about 300 mm.

<< Second problem >>
Second, since there is a twisted portion A, a problem has been pointed out that a uniform tensile force cannot be applied to the conducting wire 2 when the inductor 1 for power transmission and reception is manufactured.
That is, each conducting wire 2 of the power transmission / reception inductor (power transmission coil, power reception coil) 1 has a twisted portion A in the middle, and the twisted portion A is three-dimensionally three-dimensionally with vertical and horizontal heights. Twisted and bent.
Thus, since each conducting wire 2 is arranged three-dimensionally, in the winding work at the time of manufacture, sufficient tensile force cannot be applied to each conducting wire 2. Therefore, the lengths of the conductors 2 are likely to become non-uniform due to the accumulation of slight slack, leading to non-uniform inductance.
Although the twisting technique was adopted with the aim of equalizing the inductance, the inductance was uneven from this aspect. This problem has been particularly noticeable for the small power transmission / reception inductor 1 having a diameter of about 300 mm.

《Third problem》
Thirdly, there are many three-dimensional intersections between the lines, and also from this aspect, it has been pointed out that it is difficult to apply a uniform tensile force during production.
That is, there are many three-dimensional intersections between the wound conducting wires 2 and between the conducting wires 2 and the lead wires 3, and it was difficult to apply a tensile force to each conducting wire 2 during the winding work at the time of manufacture. Therefore, also from this surface, the lengths of the conductive wires 2 are not uniform in length and the inductance is not uniform.

<< About the present invention >>
The power transmission / reception inductor of the present invention has been made to solve the above-described problems of the prior art in view of such a situation.
In the present invention, firstly, the lead wire lead-out portions of the respective conductive wires are dispersed, and secondly, a sufficient tensile force can be applied at the time of manufacture, and thirdly, there are few three-dimensional intersections. The purpose is to propose an inductor for power transmission and reception that can apply a sufficient tensile force.

<About each claim>
The technical means of the present invention for solving such a problem is as follows, as described in the claims.
About Claim 1, it is as follows.
The power transmission / reception inductor according to claim 1 is used for wiring in a non-contact power feeding device that supplies electric power with a gap from the power transmission side to the power reception side based on the mutual induction action of electromagnetic induction. The inductor has a ring structure in which a plurality of insulated wires are wound in parallel on the same surface in a spiral shape.
In the plurality of conductive wires, the lead portions to the respective lead wires are set at different positions around the circumference of the ring structure, and the lead portions are dispersedly located with a mutual interval. It is characterized by this.

About Claim 2, it is as follows.
According to a second aspect of the present invention, in the power transmission / reception inductor according to the first aspect of the present invention, each lead-out portion has an equal interval equal to the number of the conductors.
About Claim 3, it is as follows.
According to a third aspect of the present invention, in the power transmission / reception inductor according to the second aspect, the inductor comprises a spiral coil. And each said drawer | drawing-out part is characterized by the position being set on the basis of the virtual line for every equal angle which divided 360 degree | times of the annular structure by the number of each said conducting wire.

About Claim 4, it is as follows.
According to a fourth aspect of the present invention, in the power transmission / reception inductor according to the second aspect of the present invention, the plurality of conductive wires are arranged so as to escape inward or outward without crossing between adjacent ones of the same number of equally spaced positions. It consists of a cable structure.
About Claim 5, it is as follows.
According to a fifth aspect of the present invention, in the power transmission / reception inductor according to the second aspect, the lead wires are routed from the lead portions toward the outside of the ring structure.
About Claim 6, it is as follows.
According to a sixth aspect of the present invention, in the power transmission / reception inductor according to the second aspect, the lead wires are routed from the lead portions toward the back surface and the upper surface inside the ring structure.

<About the action>
Since the present invention comprises such means, the following is achieved.
(1) In the non-contact power supply device, power is supplied from the power transmission side to the power reception side through a gap.
(2) The power transmission / reception inductor (power transmission coil, power reception coil) used in the non-contact power feeding device has a ring structure in which a plurality of conductive wires are wound in parallel on the same surface.
(3) And, in this power transmission / reception inductor, a wiring structure is adopted in which each conducting wire escapes to the inside and outside without crossing between adjacent ones at the same number of equally spaced positions.
(4) This wiring structure is adopted for each conducting wire in order to make the inductance the same, make the length of the strip uniform, and make it common.
(5) In each of the conductive wires, the lead-out portion to the lead wire is distributed at different positions around the circumference of the ring structure with an equal interval.
(6) The lead wire is appropriately routed toward the inside or the outside of the ring structure at the escape location.
(7) Since the power transmission / reception inductor of the present invention employs the above-described wiring structure, the bending work of the lead wire and the lead part, the insertion work to the penetration part, the part design of the penetration part, and the like are facilitated. .
(8) Since each conductor has a wiring structure that escapes in a plane rather than a three-dimensional cross, it is possible to apply a sufficient tensile force during production, making the length and length uniform and common. Make more certain.
(9) Further, since the three-dimensional intersection between the lines is only near the lead-out portion, a sufficient tensile force can be applied during the production from this surface, and the length can be made uniform and common.
(10) Therefore, the power transmission / reception inductor according to the present invention exhibits the following effects.

<< First effect >>
First, the lead wire lead-out portions of the conductive wires are distributed.
In the power transmission / reception inductor according to the present invention, the lead-out portions of the lead wires to the lead wires are distributed at even intervals at different positions around the circumference of the ring structure. Like this type of conventional example described above, the light is dispersed without concentrating on the same position.
That is, in order to make the inductances uniform, instead of the twisting technique as in the conventional example, a unique escapement routing structure is adopted, so that such lead portion distribution is realized. Therefore, when this power transmission / reception inductor is manufactured, the bending work of each lead wire and the lead-out portion is distributed and facilitated without being concentrated in one place as in the conventional example.
And the operation | work which pushes and inserts each lead wire in the penetration part of a coil case is also eliminated, and it can insert each lead wire with a margin and an operation | work is also facilitated from this surface.
Furthermore, there is a margin in the layout design of the accessory parts such as grommets, bushes, and grounds in the penetrating portion, and these designs are facilitated.

<< Second effect >>
Secondly, a sufficient tensile force can be applied during production.
In the power transmission / reception inductor of the present invention, each conductor is crossed between adjacent ones at evenly spaced positions in order to equalize the inductance, to equalize the length of the strip, and to make the number of windings an integer to equalize the flux linkage. It adopts a wiring structure that allows you to escape without letting it go.
As in the above-mentioned conventional example, as a result of adopting the technology of three-dimensionally twisting each conductor wire by a cross for the same inductance, a sufficient tensile force is applied in the winding work at the time of manufacture. The situation of being lost is eliminated.
Sufficient tensile force can be applied to each conductor, so that the length of each conductor can be made more uniform, and the number of turns can be made integer for each conductor, and the flux linkage can be made uniform. From the aspect, the same inductance of the power transmission / reception inductor can be realized.

《Third effect》
Thirdly, since there are few three-dimensional intersections, a sufficient tensile force can be applied at the time of manufacture also from this surface.
In the power transmission / reception inductor according to the present invention, the three-dimensional intersection between the wires only exists between the lead wire and the lead wire in the vicinity of the lead-out portion, and is less than the above-described conventional example.
Therefore, from this aspect, it is possible to apply sufficient tensile force to each conductor during the winding work at the time of manufacture, to make the length of each conductor more uniform, and to make the interlinkage magnetic flux of each conductor uniform. And the same inductance is realized.
As described above, the effects exerted by the present invention are remarkably large, such as all the problems existing in this type of prior art are solved.

About the power transmission / reception inductor according to the present invention, four lead wires (two conductive wires) are used to explain an embodiment for carrying out the invention. And (1) figure is a plane explanatory view of the example which showed the 1st example and arranged the lead wire inside. (2) The figure shows a second example, and is a perspective explanatory view of an example in which lead wires are routed inward. A third example will be described by using six lead wires (three conductive wires) to explain the embodiment for carrying out the invention. And (1) figure is a plane explanatory view of the example which wired the lead wire outside, and (2) figure is a back perspective view. A fourth example will be described by using six lead wires (three conductor wires) to explain the embodiment for carrying out the invention. And (1) figure is a plane explanatory view of the example which wired a lead wire inside, and (2) figure is a back perspective view. (1) The figure is an explanatory plan view of an example in which eight lead wires (four lead wires) are used to explain the embodiment for carrying out the invention, showing a fifth example, and the lead wires are routed inward. It is. (2) The figure is a plan explanatory view of this type of conventional example with four lead wires (two conductors), and (3) is the twist of the conventional example with six lead wires (three conductors). It is explanatory drawing of a location. For the description of the non-contact power feeding device, (1) is an overall explanatory diagram, and (2) is a block diagram of the configuration.

Hereinafter, embodiments for carrying out the present invention will be described in detail.
<< About the non-contact power feeding device 7 >>
First, the non-contact power feeding device 7 as a premise of the present invention will be generally described with reference to FIG.
The non-contact power feeding device 7 is close to the power receiving coil (inductor) 11 of the power receiving side circuit 10 from the power transmitting coil (inductor) 9 of the power transmitting side circuit 8 with an air gap G based on the mutual induction action of electromagnetic induction. Power is supplied while being located.

Such a non-contact power feeding device 7 will be further described in detail. First, the primary power transmission side circuit 8 is stationaryly arranged on the ground, road surface, or other ground 13 side in a power feeding area such as the power feeding stand 12.
On the other hand, the secondary power receiving side circuit 10 is mounted on the side of a vehicle 14 such as an electric vehicle (EV) or a train, or other moving body. The power receiving side circuit 10 is typically connected to a vehicle-mounted battery 15 as shown in the figure, but may be directly connected to another load.
Therefore, the power transmission coil 9 of the power transmission side circuit 8 and the power reception coil 11 of the power reception side circuit 10 are located in correspondence with each other with a slight air gap G of about several tens of mm to several hundreds of mm during power feeding.
As shown in the figure, a stop power feeding method in which the power receiving coil 11 is stopped at a corresponding position from the upper side or the like with respect to the power transmitting coil 9 is representative. In the case of the stop power feeding method, the power receiving coil 11 and the power transmitting coil 9 have a symmetrical structure that forms a pair in the vertical direction and the like.
On the other hand, a mobile power feeding method in which the power receiving coil 11 performs power feeding while traveling on the power transmitting coil 9 at a low speed is also possible.
The power transmission coil 9 of the power transmission side circuit 8 is connected to a high frequency power source (power inverter) 16. The high-frequency power source 16 is composed of an inverter for exchanging frequencies and the like, and energizes, for example, high-frequency alternating current of about several kHz to several tens of kHz to several hundreds of kHz toward the power transmission coil 9.
The power receiving coil 11 of the power receiving side circuit 10 can be connected to the battery 15 in the illustrated example, and the traveling motor 17 is driven by the charged battery 15. In the figure, 18 is a converter (rectifier and smoothing unit) that converts alternating current into direct current, 19 is an inverter that converts direct current into alternating current, and S is a switch provided in the output line of the power receiving circuit 10.

The mutual induction effect of electromagnetic induction is as follows. When supplying power, it is a publicly known and publicly known method to generate an induced electromotive force in the power receiving coil 11 by forming magnetic flux in the power transmitting coil 9 and supply power from the power transmitting coil 9 to the power receiving coil 11.
That is, by applying and supplying a feeding AC and exciting current from the high frequency power supply 16 to the power transmission coil 9, a self-induced electromotive force is generated and a magnetic field is generated around the power transmission coil 9, and the magnetic flux is perpendicular to the coil surface. Formed. Then, the formed magnetic flux penetrates the power receiving coil 11 and is linked, whereby an induced electromotive force is generated and a magnetic field is induced.
Using the magnetic field induced in this way, it is possible to supply power of several kW or more to several tens kW to several hundreds kW. The electric circuit of magnetic flux on the power transmission coil 9 side and the electric circuit of magnetic flux on the power reception coil 11 side are electromagnetically coupled with each other by forming an electric circuit of magnetic flux, that is, a magnetic path. The non-contact power feeding device 7 performs non-contact power feeding based on such mutual induction action of electromagnetic induction.
About the non-contact electric power feeder 7, the general description is as above.

<< Outline of the Invention >>
Hereinafter, power transmission / reception inductors 9 and 11 (power transmission coil 9 and power reception coil 11) of the present invention will be described with reference to FIGS. 1 to 4 (1).
The power transmission / reception inductors 9 and 11 according to the present invention are used for wiring in the non-contact power feeding device 7 that supplies power from the power transmission side circuit 8 to the power reception side circuit 10 based on the above-described mutual induction action of electromagnetic induction. .
The inductors 9 and 11 have a ring structure in which a plurality of insulated wires 20 are wound in parallel on the same surface in a spiral shape. And the several conducting wire 20 consists of a wiring structure escaped inside and outside, without making it cross | intersect between adjacent for every equal spacing position of the same number.
In the plurality of conductors 20 of the inductors 9 and 11, the lead portions 21 to the respective lead wires 3 are set at different positions around the circumference of the ring structure, and the lead portions 21 are spaced apart from each other. It is distributed. The plurality of conducting wires 20 are the same in the number of windings, length, shape, and the like.
The outline of the present invention is as described above. Hereinafter, the present invention will be described in detail.

<< Ring structure of inductors 9 and 11 >>
First, the inductors 9 and 11 (the power transmission coil 9 and the power reception coil 11) are composed of a plurality of conductive wires 20, and form a ring structure.
That is, in order to obtain a large allowable current and to realize a large power supply, the inductors 9 and 11 are wound while a plurality of insulation-coated conductors 20 are arranged in parallel in the same plane and maintain a parallel positional relationship. Has been.
A plurality of conducting wires 20 are wound into a circular shape, a square shape, or other shapes to form a flat and thin flat shape with no overall unevenness without a solid portion due to a cross. A space space is formed in the center.
The inductors 9 and 11 formed of the assembly of the conductive wires 20 have a ring structure, a rectangular ring structure, and other ring structures. Each illustrated example includes a spiral coil having an annular structure.
The ring structure of the inductors 9 and 11 is as described above.

<< Wiring structure of inductors 9 and 11 (part 1) >>
In the plurality of conductors 20 of the inductors 9 and 11, the lead portions 21 to the respective lead wires 3 are set at different positions around the circumference of the ring structure, and the lead portions 21 are spaced apart from each other. It is distributed. The mutual interval is composed of the same number of equal intervals as the number of the conductive wires 20.
For example, as shown in FIG. 1, in the example in which the number of wound conductive wires 20 is two, the distance between the lead portions 21 to each lead wire 3 is divided into two around the circumference of the ring structure. It consists of uniform intervals.
As shown in FIGS. 2 and 3, in the example in which the number of the conductive wires 20 is three, the mutual interval between the lead portions 21 is an equal interval obtained by dividing the circumference of the ring structure into three. As shown in FIG. 4A, in the example in which the number of the conductive wires 20 is four, the mutual interval between the lead portions 21 is an equal interval obtained by dividing the circumference of the ring structure into four.

In addition, when the inductors 9 and 11 are formed of a spiral coil, the interval setting described above can be grasped as the following angle setting.
In other words, it is possible to grasp that each drawing portion 21 is set with reference to a virtual line for each uniform angle obtained by dividing 360 degrees of the annular structure by the number of the conductive wires 20.
For example, in the example in which the number of the 20 conductive wires in FIG. 1 is two, the two lead-out portions 21 are located on the imaginary line at every uniform angle of 180 degrees. In the example in which the number of 20 conductive wires in FIG. 2 and FIG. 3 is 3, each drawing portion 20 is located on a virtual line for each uniform angle of 120 degrees. In the example in which the number of conductive wires 20 in FIG. 4A is four, it is grasped that each drawing portion 20 is located on a virtual line for each uniform angle of 90 degrees.
As for the position setting of each drawing portion 21, it is also possible to grasp the angle as a guide.
The wiring structure (part 1) of the inductors 9 and 11 is as described above.

<< Wiring structure of inductors 9 and 11 (part 2) >>
The plurality of conductors 20 of the inductors 9 and 11 employ the following wiring structure at the same number of equally spaced positions starting from the lead portion 21 and the same number.
That is, each of the plurality of conductive wires 20 is not crossed between adjacent ones, but is curved inwardly (outside depending on how to look) and is avoided from being curved, and the escape structure B is provided in the middle. Become.
In order to make the inductances uniform, make the lengths of the strips uniform, and make them common, the inductors 9 and 11 employ the above-described wiring structure for each conductive wire 20. Each conductor 20 has the same length, including the dimensions at the respective relief points B, and the uniform length is realized, and the number of turns is also made integer.
In the example of FIG. 1, the lengths of the two conducting wires 20 are the same. In the example of FIGS. 2 and 3, the lengths of the three conducting wires 20 are the same. In the example of FIG. 4A, the lengths of the four conducting wires 20 are the same.
The wiring structure of inductors 9 and 11 (part 2) is as described above.

《Lead 3 wiring》
In the inductors 9 and 11, the lead wires 3 (3 ₁ , 3 ₂ , 3 ₃ , 3 ₄ ) are routed from the respective lead portions 21 toward the outside of the ring structure, or are respectively drawn out. It is routed from the portion 21 toward the back surface, the top surface, etc. inside and outside the ring structure. Which routing method is selected is arbitrary and is appropriately selected according to other conditions.
In the example of FIGS. 2A and 2B, the lead wires 3 from the lead-out portions 21 of the conductors 20 are routed toward the outside of the ring structure. In the illustrated example, the lead wire 3 is extracted to the outside and the outside of the ring structure after passing through the through portion 6 on the side surface of the coil case 5.
On the other hand, in the example of FIG. 1 (1), FIG. (2), FIG. 3 (1), FIG. 2 (2), and FIG. Each is extracted from the inside of the ring structure to the outside. The lead wire 3 is extracted to the outside through a through space (not shown) on the back surface and the upper surface of the coil case 5 after passing through the central space of the ring structure.
The wiring structure of the lead wire 3 is as described above.

《Action etc.》
The power transmission / reception inductors 9 and 11 of the present invention are configured as described above. Then, it becomes as follows.
(1) In the non-contact power feeding device 7, the power receiving coil 11 of the power receiving side circuit 10 mounted on the vehicle 14 or the like has an air gap G in the power transmitting coil 9 of the power transmitting side circuit 8 that is quantitatively arranged on the road surface or the like. It is close to the corresponding position. Then, power is supplied from the power transmission side to the power reception side (see FIG. 5).

  (2) In the power transmission / reception inductors 9 and 11 (the power transmission coil 9 and the power reception coil 11) used in the non-contact power feeding device 7, a plurality of conductive wires 20 are wound in parallel on the same surface in a spiral shape. (See (1) in FIGS. 1 to 4).

(3) In the power transmitting and receiving inductors 9 and 11, the following wiring structure is adopted for the plurality of conductive wires 20.
That is, each conducting wire 20 has a relief portion B that curves inward (outside) in a plane and shifts to the next radius without crossing between adjacent ones of the same number of equally spaced positions. (Refer to FIG. 1 (1), FIG. 2 (2), FIG. 2 (1), FIG. 3 (1), FIG. 4 (1), etc.)).

(4) Such a wiring structure is adopted for each conductor 20 in order to make the inductance uniform, uniform the length of the strip, and uniform the flux linkage.
That is, in the power transmission / reception inductors 9 and 11, the inductances are made the same by making the lengths of the conductors 20 uniform and making the number of turns an integer, so that the current is uniform, the magnetic flux linkage between transmission and reception is uniform, Adopted to stabilize supply.

(5) And each lead wire 20 has a lead-out portion 21 to each lead wire 3 set at a different position around the circumference of the ring structure (see the above figures).
In other words, the lead portions 21 are dispersedly located with a mutual interval, and the mutual interval is made up of the same number of equal intervals as the number of the conductors 20.

  (6) The lead wires 3 to the power transmission / reception inductors 9 and 11 are routed toward either the inner or outer side of the ring structure, and thereafter toward the back surface or the upper surface (see FIG. 1, see FIG. 2, FIG. 3, FIG. It is appropriately selected in any direction.

(7) The power transmitting and receiving inductors 9 and 11 according to the present invention are as follows.
First, for each conducting wire 20, in order to make the inductance the same, make the length of the wire uniform, and make the flux linkage uniform, the wiring structure is made to escape at the location B without crossing between adjacent ones at every equally spaced position. Adopted. And the lead-out part 21 to the lead wire 3 of each conducting wire 20 is distributed at equal intervals.
Since the lead portions 21 are dispersed without being concentrated in one place in this way, the power transmission / reception inductors 9 and 11 facilitate the bending work of the lead wires 3 and the lead portions 21 during manufacture. .
Further, the operation of inserting the lead wire 3 into the coil case 5 through portion 6 is facilitated. Furthermore, the design of the accessory parts such as grommets, bushes, and glands used in the through portion 6 is facilitated.

(8) The power transmission / reception inductors 9 and 11 employ a wiring structure in which the conductive wires 20 are allowed to escape in a planar manner instead of a three-dimensional manner at the escape location B.
Therefore, at the time of manufacture, it is possible to apply a sufficient tensile force to each conducting wire 20, and the length of each conducting wire 20 can be made uniform and shared more reliably.

(9) Moreover, in the power transmission / reception inductors 9 and 11, the three-dimensional intersection between the lines is only between the lead wire 20 and the lead wire 3 near the lead-out portion 21. The place where the line crosses over the other line is only in the vicinity of the lead-out portion 21.
Therefore, also from this surface, a sufficient tensile force can be applied to each conductive wire 20, and the uniform length and commonality of the lengths of the respective conductive wires 20 are further ensured.
As for the action, it is as above.

(10) As described above, the present invention can be configured as follows without depending on the illustrated example in which the escape portion B is provided.
That is, it is also possible to adopt a configuration in which the conducting wires 20 having the same length are press-molded and overlapped with the phases shifted. The so-called mosquito coil structure allows the above-described escape with a gentle radius change even without the escape location B as shown in the example. The tensile force becomes more stable.

1 Inductor (power transmission coil, power reception coil) (conventional example)
2 Conductor (conventional example)
2 ₁ , 2 ₂ , 2 ₃ conductors (conventional example)
3 Lead wire 3 ₁ , 3 ₂ , 3 ₃ , 3 ₄ Lead wire 4 Lead-out part (conventional example)
DESCRIPTION OF SYMBOLS 5 Coil case 6 Penetration part 7 Non-contact electric power feeder 8 Power transmission side circuit 9 Power transmission coil (inductor) (this invention)
10 power receiving side circuit 11 power receiving coil (inductor) (present invention)
12 Power Supply Station 13 Ground 14 Vehicle 15 Battery 16 High Frequency Power Supply 17 Motor 18 Converter 19 Inverter 20 Conductor (Invention)
21 Leader (present invention)
A Twisted part (conventional example)
B Escape point (present invention)
G Air gap S Switch

Claims (6)

In a non-contact power feeding device that supplies power while leaving a gap from the power transmission side to the power receiving side based on the mutual induction action of electromagnetic induction,
The inductor has a ring structure in which a plurality of insulated wires are wound in parallel on the same surface in a spiral shape,
A plurality of the lead wires, the lead portions to the respective lead wires are set at different positions around the circumference of the ring structure, and the lead portions are dispersedly located with a mutual interval between them, Inductor for power transmission / reception characterized by   2. The power transmission / reception inductor according to claim 1, wherein each of the lead portions has an equal interval equal to the number of the conductors.   In Claim 2, the inductor is formed of a spiral coil, and each of the lead portions is positioned on a virtual line for each uniform angle obtained by dividing 360 degrees of the annular structure by the number of the conductors. A power transmission / reception inductor.   The plurality of conductive wires according to claim 2, wherein the plurality of conductive wires have a wiring structure that escapes inward or outward without crossing between adjacent ones of the same number of equally spaced positions. Inductor for power transmission / reception.   3. The power transmission / reception inductor according to claim 2, wherein each lead wire is routed from each lead-out portion toward the outside of the ring structure.   3. The power transmission / reception inductor according to claim 2, wherein each of the lead wires is routed from each of the lead portions toward the back surface and the upper surface inside the ring structure.

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