WO2013057913A1

WO2013057913A1 - Non-contact power supply apparatus and primary coil block for non-contact power supply apparatus

Info

Publication number: WO2013057913A1
Application number: PCT/JP2012/006579
Authority: WO
Inventors: 博之柳生; 秀明安倍; 太田　智浩
Original assignee: パナソニック株式会社
Priority date: 2011-10-17
Filing date: 2012-10-15
Publication date: 2013-04-25
Also published as: TW201330443A; JP2013089728A; JP5954698B2

Abstract

A primary coil (L1) fixedly provided between a magnetic body (6) and a cover (7) has the same quadrangular cross-section as the magnetic body (6) and the cover (7). The primary coil (L1) having the quadrangular cross-section is wound from the magnetic body (6) toward the upper-side cover (7), and the central axis of the coil is upwardly increasingly biased in the horizontal direction. The central axis of the primary coil (L1) is biased in the direction of the diagonal line of the cross-section of the coil.

Description

Non-contact power feeder and primary coil block of non-contact power feeder

The present invention relates to a non-contact power feeding device and a primary coil block of the non-contact power feeding device.

2. Description of the Related Art In recent years, contactless power supply systems using an electromagnetic induction system have a wide mounting surface and efficiently supply power to a power receiving device regardless of the position on the wide mounting surface of an electric device equipped with a power receiving device. There is an increasing demand for a non-contact power feeding device that can perform the above operation.

For this purpose, a wide mounting surface is divided into a plurality of power feeding areas, and a primary coil is provided for each power feeding area. And when an electric equipment is mounted in the mounting surface, a non-contact electric power feeder excites the primary coil of the electric power feeding area of a power feeding apparatus facing the secondary coil provided in the power receiving apparatus. As a result, the secondary power is supplied to the secondary coil of the power receiving device of the electric device, regardless of the power supply area on the mounting surface.

However, in a non-contact power supply apparatus including a primary coil provided for each of a plurality of power supply areas formed by dividing a wide placement surface, the primary coil of one power supply area is one of the other power supply areas. Since it is provided adjacent to the secondary coil, the magnetic fluxes of the primary coils adjacent to each other interfere with each other.

Therefore, when the secondary coil of the power receiving device is disposed at a position shifted from the primary coil of the non-contact power feeding device, the secondary coil is a magnetic flux of another primary coil adjacent to the primary coil. As a result, there arises a problem that the power reception loss of the secondary power increases.

For example, the secondary power of the secondary coil L2 is small when the secondary coil is arranged near the middle position of the adjacent primary coils. Depending on the position where the electrical device is placed, the power supply efficiency changes greatly.

In other words, since the power supply efficiency varies greatly depending on the position where the electric device is placed on the mounting surface of the non-contact power supply device, the conventional non-contact power supply device is not practical.

Therefore, in Patent Document 1, the power feeding device includes a dense array layer of two primary coils, and the two layers of the array layer so that the center of the coil of one layer is shifted from the center of the coil of the other layer. By repeating the above, the above problem is solved.

U.S. Pat. No. 7,164,255

However, since the power supply apparatus includes a dense array layer of two primary coils, there is a problem that the thickness of the entire coil increases and the entire apparatus becomes large. In addition, since the number of coils increases, the number of objects to be controlled increases, the control becomes complicated, and the circuit scale increases, leading to an increase in cost. In addition, since the excitation control has to be performed up to an extra coil, the efficiency has been reduced.

The present invention has been made in order to solve the above-described problem, and its purpose is to increase the number of primary coils, and to increase the number of primary coils, and the secondary coil of the power receiving device according to the position where the electrical equipment is placed. It is an object of the present invention to provide a non-contact power supply device that can reduce fluctuations in the amount of power received by the power supply and supply power with high efficiency. Furthermore, the objective of this invention is providing the primary coil block of the non-contact electric power feeder used for the non-contact electric power feeder.

In order to solve the above-described problem, according to a first aspect of the present invention, there is provided a non-contact power feeding device that feeds secondary power to a secondary coil provided in a power receiving device of an electrical device using an electromagnetic induction phenomenon. The contactless power supply device includes a plurality of power supply areas. In the contactless power supply device, the contactless power supply device includes a plurality of primary coils respectively provided corresponding to the plurality of power supply areas. , Wound around a central axis, each primary coil has an outer shape biased in a direction perpendicular to the central axial direction, and the plurality of primary coils are orthogonal to the central axial direction. Provided is a non-contact power feeding device in which a part of the outer surface of the primary coil corresponding to the power feeding areas adjacent to each other overlaps each other when viewed from the central axis direction. Is done.

In the above configuration, each of the primary coils preferably has a quadrangular cross section.

In the above configuration, each primary coil has an outer shape that expands from one winding end toward the other winding end, and adjacent primary coils have different coil orientations. It is preferable that they are arranged.

Further, in the above configuration, each primary coil has an outer shape of a regular polygonal frustum shape, and the primary coils adjacent to each other have different coil directions and are outside the primary coils adjacent to each other. The side surfaces are preferably arranged so as to overlap each other.

Further, in the above configuration, each primary coil preferably has a regular octagonal truncated pyramid shape.

According to a second aspect of the present invention, there is provided a primary coil block of a non-contact power feeding device that feeds secondary power to a secondary coil provided in a power receiving device of an electrical device using an electromagnetic induction phenomenon, A primary coil having first and second winding ends and wound around a central axis, wherein the primary coil has an outer shape biased in a direction perpendicular to the central axis direction; Provided is a primary coil block of a non-contact power feeding device including a primary coil, a magnetic body disposed at the first winding end, and a cover made of an insulating material disposed at the second winding end. Is done.

Further, in the above configuration, the primary coil has a quadrangular cross section, and a central axis of the primary coil is biased in a direction perpendicular to the one side at an intermediate position of one side of the cross section. It is preferable that

In the above configuration, it is preferable that the primary coil has a quadrangular cross section, and a central axis of the primary coil is biased in a diagonal direction of the cross section.

In the above configuration, it is preferable that the primary coil is wound so that the central axis coincides with the central point of the magnetic body and the central point of the cover.

According to a third aspect of the present invention, there is provided a primary coil block of a non-contact power feeding device that feeds secondary power to a secondary coil provided in a power receiving device of an electrical device using an electromagnetic induction phenomenon, A primary coil having a regular polygonal frustum-shaped outer shape, the primary coil having first and second winding ends, and a magnetic coil disposed at the first winding end. There is provided a primary coil block of a non-contact power feeding device including a body and a cover made of an insulating material and disposed at the second winding end.

In the above configuration, the primary coil preferably has a regular octagonal truncated pyramid shape.

According to the present invention, power is efficiently supplied from the non-contact power feeding device to the secondary coil of the power receiving device regardless of the position of the mounting surface on which the electric device is mounted without increasing the number of primary coils. Can be supplied.

BRIEF DESCRIPTION OF THE DRAWINGS The whole perspective view which shows the non-contact electric power feeder and electric equipment of the non-contact electric power feeding system of 1st Embodiment of this invention. The whole perspective view of the primary coil block of a 1st embodiment of the present invention. The disassembled perspective view of the primary coil block of 1st Embodiment of this invention. The top view of the primary coil of 1st Embodiment of this invention. The top view of the primary coil block of 1st Embodiment of this invention. The side view of the primary coil block of 1st Embodiment of this invention. The top view which shows the combination of the some primary coil block of 1st Embodiment of this invention. The side view which shows the combination of the some primary coil block of 1st Embodiment of this invention. Sectional drawing which shows the secondary coil of 1st Embodiment of this invention. It is a figure explaining the movement of the secondary coil from the one position on the mutually adjacent primary coil to the other position, (a) is a figure which shows the movement of the secondary coil on the conventional primary coil (B) is a figure which shows the movement of the secondary coil on the primary coil of this embodiment. The graph which shows the output of the secondary coil with respect to a position when a secondary coil moves on the conventional primary coil and the primary coil of 1st Embodiment, respectively. The whole primary coil block perspective view of a 2nd embodiment of the present invention. The disassembled perspective view of the primary coil block of 2nd Embodiment of this invention. The top view of the primary coil block of 2nd Embodiment of this invention. The side view of the primary coil block of 2nd Embodiment of this invention. The top view which shows the combination of the some primary coil block of 2nd Embodiment of this invention. The side view which shows the combination of the some primary coil block of 2nd Embodiment of this invention. (A) is a perspective view of the 1st primary coil block of 3rd Embodiment of this invention, (b) is a perspective view of the 2nd primary coil block of 3rd Embodiment of this invention. The disassembled perspective view of the 1st primary coil block of 3rd Embodiment of this invention. The side view of the primary coil of the 1st primary coil block of 3rd Embodiment of this invention. The disassembled perspective view of the 2nd primary coil block of 3rd Embodiment of this invention. The side view of the primary coil of the 2nd primary coil block of 3rd Embodiment of this invention. The top view which shows the combination of the some 1st and 2nd primary coil block of 3rd Embodiment of this invention. The side view which shows the combination of the some 1st and 2nd primary coil block of 3rd Embodiment of this invention. The whole perspective view of the primary coil block for demonstrating another example.

(First embodiment)
Hereinafter, a non-contact power feeding device of a non-contact power feeding system according to a first embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the non-contact power feeding system includes a non-contact power feeding device (hereinafter simply referred to as a power feeding device) 1 and an electric device (hereinafter simply referred to as a device) E that is fed in a non-contact manner from the power feeding device 1. Including.

The power feeding device 1 has a rectangular plate-shaped housing 2, and the upper surface of the housing 2 is a flat surface and forms a placement surface 3 on which the device E is placed. The mounting surface 3 is divided into a plurality of rectangular power feeding areas AR1, and in this embodiment, twelve power feeding areas AR1 arranged in an array of 3 columns and 4 rows are formed on the mounting surface 3. Yes.

The primary coil block 5 is disposed at a position in the housing 2 corresponding to each power supply area AR1, as indicated by a broken line in FIG.

As shown in FIGS. 2 and 3, each primary coil block 5 includes a primary coil L1, a magnetic body 6 fixed to a lower coil surface of the primary coil L1, and an upper coil of the primary coil L1. And a cover 7 fixed to the surface.

In this embodiment, the magnetic body 6 is a square plate made of a soft magnetic material. By connecting and fixing the magnetic body 6 to one (lower side) winding end of the primary coil L1, the lower coil surface of the primary coil L1 is connected to the magnetic body 6 and fixed. In the present embodiment, the cover 7 is a resin square plate made of an insulating material. By connecting and fixing the cover 7 to the other (upper) winding end of the primary coil L1, the upper coil surface of the primary coil L1 is connected to the cover 7 and fixed. In this embodiment, the cover 7 has a rectangular shape that is the same shape as the magnetic body 6.

The primary coil L1 fixed between the magnetic body 6 and the cover 7 is formed of a coil having the same square cross section as the magnetic body 6 and the cover 7. The primary coil L1 having a rectangular cross section is wound from the magnetic body 6 toward the upper cover 7, and the horizontal direction (mounting) as the central axis Cx (see FIG. 4) of the primary coil L1 moves upward. In a direction parallel to the surface 3).

More specifically, as shown in FIG. 4, the deviation is such that the central axis Cx of the primary coil L1 is in the diagonal direction of the rectangular coil cross section when viewed from the axial direction (direction perpendicular to the mounting surface 3). Be biased. Therefore, the magnetic body 6 and the cover 7 do not face each other and face each other while being shifted in the diagonal direction.

In this embodiment, as shown in FIGS. 5 and 6, the magnetic body 6 (cover 7) and the primary coil L 1 are regular squares having a side length DX 0 of 42 mm and the other side length DY 0 of 42 mm. Is set. The length H in the axial direction is set to 4.5 mm.

At this time, the cover 7 is arranged with respect to the magnetic body 6 at a position displaced 20 mm on the right side and 20 mm on the rear side. In other words, the upper coil surface of the primary coil L1 is disposed at a position displaced 20 mm on the right side and 20 mm on the rear side with respect to the lower coil surface of the primary coil L1.

Furthermore, in other words, the central axis Cx of the primary coil L1 is, as shown in FIG. 4, the center point of the magnetic body 6 (center point P0 of the lower coil surface) and the center point of the cover 7 (of the upper coil surface). A straight line passing through the center point P1).

The primary coil block 5 configured in this way is arranged at a position in the housing 2 corresponding to each power supply area AR1.

Next, the arrangement method of the primary coil block 5 will be described. For convenience of explanation, the primary coil block 5 arranged in the four adjacent power feeding areas AR1 will be described.

FIG. 7 shows a layout of four primary coil blocks 5 adjacent to each other. As shown in FIG. 7, the primary coil blocks 5 are provided side by side so that the biasing directions coincide with each other. That is, when the magnetic bodies 6 of the four primary coil blocks 5 are arranged adjacent to each other (in a 2 × 2 array), the covers 7 of the four primary coil blocks 5 are adjacent to each other on the upper side. To be arranged.

At this time, since the four primary coil blocks 5 are offset in the diagonal direction of the rectangular coil cross section, the primary coil L1 has two adjacent primary coils L1 as shown in FIG. The outer side surfaces overlap each other when viewed from above the primary coil L1. Moreover, the outer surfaces of the four adjacent primary coils L1 also overlap each other when viewed from above the primary coil L1.

Accordingly, the outer surfaces of the primary coils L1 adjacent to each other overlap each other at the boundary portion of the plurality of power feeding areas AR1 formed on the mounting surface 3, and this boundary portion has a certain width D. Have. As a result, the magnetic flux between the primary coils L1 adjacent to each other is averaged, and the magnetic flux density can be made uniform.

In addition, a basic power supply unit circuit (not shown) for the primary coil block 5 (primary coil L1) of each power supply area AR1 is provided at a position in the housing 2 outside the power supply area AR1. ing. Each basic power supply unit circuit drives and excites the primary coil L1 of the corresponding primary coil block 5 alone or in cooperation with the other primary coil L1, and is mounted on the power supply area AR1. To contactless power supply.

On the other hand, the device E that receives power supply from the power supply device 1 by electromagnetic induction includes a housing 10, a power reception area AR 2 for the power supply area AR 1 of the power supply device 1 formed on the lower surface of the housing 10, and Secondary coil L2.

As shown in FIG. 9, the secondary coil L2 is attached to a magnetic body 11 made of a square plate-like magnetic material. In this embodiment, the outer shape of the rectangular plate-like magnetic body 11 is a regular square having the same shape as the magnetic body 6 of the primary coil block 5.

In the present embodiment, the cross section of the secondary coil L2 attached to the magnetic body 11 forms the same square as the primary coil L1. And the magnetic body 11 attached to the secondary coil L2 is arrange | positioned and fixed in the position of the power receiving area AR2 within the housing | casing 10. FIG.

And when the apparatus E is mounted on the mounting surface 3 of the power feeding device 1, the primary coil L1 of the primary coil block 5 positioned immediately below the secondary coil L2 is fed and excited.

That is, when the power feeding device 1 of the device E is placed immediately above the primary coil L1 of the primary coil block 5, the power feeding device 1 feeds and excites the primary coil L1. Therefore, when the power supply device 1 of the device E is placed immediately above the plurality of primary coils L1 that are adjacent to each other and overlap, the power supply device 1 supplies the plurality of primary coils L1 and excites them. To do.

The secondary power received by the secondary coil L2 is rectified by a rectifier circuit provided in the power receiving device 12 mounted in the housing 10 at a position adjacent to the secondary coil L2, and DC / DC It is converted into a desired DC voltage by a converter and supplied to a load (not shown) of the device E.

Next, the operation of the power feeding device 1 configured as described above will be described.

Now, when the device E (secondary coil L2) is placed on the placement surface 3 of the power feeding device 1 at the boundary portion between the power feeding area AR1 and the power feeding area AR1, the power feeding device 1 is connected to the device E (2 A plurality of primary coils L1 straddling the boundary located immediately below the secondary coil L2) are driven and excited.

Since the outer surfaces of the primary coils L1 adjacent to each other overlap each other in this boundary portion having a constant width D, the magnetic flux between the primary coils L1 adjacent to each other is averaged. As a result, the magnetic flux density can be made uniform, and the secondary coil L2 receives the secondary power by feeding and exciting the primary coil L1. The secondary power received by the secondary coil L2 is rectified by a rectifier circuit provided in the power receiving device 12, converted into a desired DC voltage by a DC / DC converter, and supplied to the load of the device E.

Here, the power reception efficiency of the secondary coil L2 in the case where the four primary coils L1 of the present embodiment are arranged adjacent to each other and the case where the four conventional primary coils are arranged adjacent to each other. A comparative verification was conducted.

FIG. 10 (a) shows four conventional primary coils La excited. In FIG. 10A, the coil surface of the secondary coil L2 is 2 from the position facing the coil surface of the front left primary coil La to the position facing the coil surface of the rear left primary coil La. The next coil L2 is moved.

At this time, the output from the secondary coil L2 with respect to the position of the secondary coil L2 was obtained as shown by the output voltage line V1 in FIG. The output in FIG. 11 is represented by “%”, and 100% means that the output power of the primary coil L1 is received 100% by the secondary coil.

As apparent from the output voltage line V1 of FIG. 11, in the case of the conventional primary coil La, when the secondary coil L2 is present at a position where the primary coil La and the secondary coil L2 face each other, the secondary coil L2 When the secondary coil L2 exists at an intermediate position between the primary coil L1 and the primary coil L1, the output of the secondary coil L2 is minimized. Due to the movement of the position of the secondary coil L2, the output of the secondary coil L2 is reduced by about 57%.

FIG. 10B shows four excited primary coils L1 of the present embodiment. In FIG. 10B, the coil surface of the secondary coil L2 faces the lower coil surface of the rear left primary coil L1 from the position facing the lower coil surface of the front left primary coil L1. The secondary coil L2 is moved to the corresponding position.

And the output from the secondary coil L2 with respect to the position of the secondary coil was obtained as shown by the output voltage line V2 in FIG.

As apparent from the output voltage line V2 of FIG. 11, in the case of the primary coil L1 of this embodiment, the output of the secondary coil L2 is 50% at the position where the primary coil L1 and the secondary coil L2 face each other. However, the output is minimized at an intermediate position between the primary coil L1 and the primary coil L1. Due to the movement of this position, the output of the secondary coil L2 is reduced by 41%.

Therefore, in the case of the primary coil L1 of this embodiment, compared with the conventional primary coil La, according to the position on the primary coil L1 (mounting surface 3) on which the secondary coil L2 (device E) is mounted. It can also be seen that the fluctuation in the output from the secondary coil L2 is small.

Next, the effects of the embodiment configured as described above will be described below.

(1) According to the above embodiment, each of the plurality of primary coils L1 provided corresponding to each of the plurality of power feeding areas AR1 is wound around the central axis, and the direction of the central axis is The outer shape is biased in the orthogonal direction. The plurality of primary coils are provided along a direction orthogonal to the central axis direction, and when a part of the outer surface of the primary coil L1 corresponding to the adjacent feeding area AR1 is viewed from the central axis direction, Overlap each other.

Therefore, the outer surfaces of the primary coils L1 adjacent to each other overlap each other at the boundary portion of the plurality of power feeding areas AR1 formed on the mounting surface 3, and this boundary portion has a constant width D. . Thereby, the magnetic flux between the adjacent primary coils L1 is averaged, and the magnetic flux density can be made uniform.

As a result, it is possible to reduce fluctuations in the secondary power received by the secondary coil L2 according to the position on the placement surface 3 on which the device E is placed. That is, the bias of the secondary power received by the secondary coil L2 due to the position on the placement surface 3 on which the device E is placed can be greatly reduced. In other words, when the device E is placed on the placement surface 3, the device E can be placed without worrying about the placement position.

Moreover, since the central axis Cx of the primary coil L1 is biased in the diagonal direction of the coil cross section, the four outer sides of the primary coil L1 are overlaid on the outer sides of the other adjacent primary coils L1. Can be wrapped. Therefore, more efficient power feeding to the secondary coil L2 can be realized.

(2) According to the above embodiment, since only one primary coil L1 is provided in each power supply area AR1, it is possible to eliminate a blank portion of the magnetic flux to be excited without increasing the number of primary coils L1. it can. As a result, the number of coils can be reduced as much as the number of primary coils L1, and the control of the coils is facilitated, so that the circuit scale can be reduced and the cost of the power feeding apparatus 1 can be reduced.

(3) According to the above embodiment, the primary coil L1 wound around the central axis has an outer shape biased in a direction orthogonal to the central axis direction, and the primary coil of the adjacent power feeding area AR1 The outer surfaces of L1 overlap each other. That is, this configuration is different from a configuration in which two primary coils L1 are simply stacked in the thickness direction. Therefore, an increase in the thickness of the coil can be suppressed, and the power supply device 1 can be reduced in size.
(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to the drawings.

In the present embodiment, the primary coil block 5 has characteristics different from those of the first embodiment, and other configurations are the same as those of the first embodiment. Therefore, for convenience of explanation, the primary coil block 5 different from the first embodiment will be described in detail, and a detailed description of portions common to the first embodiment will be omitted.

In this embodiment, as shown in FIGS. 12 and 13, the magnetic body 6 and the cover 7 included in the primary coil block 5 have the same regular square shape as in the first embodiment. Moreover, the primary coil L1 arrange | positioned between the magnetic body 6 and the cover 7 also has the same square cross-sectional shape as 1st Embodiment.

And the magnetic body 6 and the cover 7 are different from the first embodiment, and are arranged to face each other without being biased. On the other hand, the primary coil L1 disposed between the magnetic body 6 and the cover 7 is a square from the lower magnetic body 6 toward the intermediate position between the magnetic body 6 and the cover 7 as in the first embodiment. The second cross section is biased in the first direction along the diagonal line of the coil cross section of the shape, and is opposite to the first direction along the diagonal line from the intermediate position of the magnetic body 6 and the cover 7 toward the upper cover 7. Biased in the direction.

Therefore, the coil center axis Cx of the primary coil L1 is, as shown in FIG. 13, the center point P0 of the lower coil surface with the center point Pm of the coil surface at the intermediate position between the magnetic body 6 and the cover 7 as the bending point. To the bent straight line passing through the center point P1 of the upper coil surface.

That is, as shown in FIGS. 14 and 15, the center point Pm of the coil surface at the intermediate position between the magnetic body 6 and the cover 7 of the primary coil L1 is the center point P0 of the lower coil surface (the center of the upper coil surface). With respect to the point P1), it is arranged at a position displaced 20 mm on the right side and 20 mm on the far side in FIG. In other words, the coil surface at the intermediate position between the magnetic body 6 and the cover 7 is disposed at a position displaced 20 mm on the right side and 20 mm on the far side in FIG. 15 with respect to the upper and lower coil surfaces of the primary coil L1.

And the primary coil block 5 configured in this way is arranged in the corresponding power feeding area AR1 in the housing 2.

Next, the arrangement method of the primary coil block 5 will be described. For convenience of explanation, the primary coil block 5 disposed in the four power feeding areas AR1 adjacent to each other will be described.

16 and 17 show a layout view and a side view of four primary coil blocks 5 adjacent to each other. As shown in FIG. 15, the primary coil blocks 5 are provided side by side with the directions in which they are biased. That is, the magnetic bodies 6 (covers 7) of the four primary coil blocks 5 are arranged adjacent to each other.

As a result, in FIGS. 16 and 17, the outer surface of the right primary coil L1 and recessed in the biasing direction protrudes from the outer surface of the left primary coil L1 and biased. The outer surface is fitted. Similarly, the outer surface of the primary coil L1 on the back side in FIG. 17 that is recessed in the biasing direction protrudes in the biasing direction on the outer surface of the primary coil L1 on the front side in FIG. The outer surface is fitted. That is, as shown in FIGS. 16 and 17, the four primary coil blocks 5 can overlap the outer surfaces of the four adjacent primary coils L1 when viewed from above.

Therefore, the outer surfaces of the primary coils L1 adjacent to each other overlap each other at the boundary portion of the plurality of power feeding areas AR1 formed on the mounting surface 3, and the boundary portion has a constant width D. As a result, the magnetic flux between the primary coils L1 adjacent to each other is averaged, and the magnetic flux density can be made uniform.

As described above, this embodiment can also obtain the effects (1) to (3) as in the first embodiment.
(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to the drawings.

In the present embodiment, the primary coil block 5 has characteristics different from those of the first embodiment, and other configurations are the same as those of the first embodiment. Therefore, for convenience of explanation, different primary coil blocks will be described in detail, and detailed description of portions common to the first embodiment will be omitted.

As shown in FIGS. 18A and 18B, the non-contact power feeding device according to the present embodiment includes a first primary coil block 5a and a second primary coil block 5b.
(First primary coil block 5a)
As shown in FIG. 19, the first primary coil block 5a has a regular octagonal pyramid-shaped outer shape disposed between a magnetic body 6a disposed on the lower side and a cover 7a disposed on the upper side. Including a primary coil L1a. The primary coil L1a has an octagonal cross section, and is formed so that the cross-sectional shape becomes smaller from the lower magnetic body 6a toward the upper cover 7a. That is, the primary coil L1a has an octagonal frustum-shaped outer shape whose diameter decreases toward the upper side.

As shown in FIG. 20, the lower outer size Db of the lower coil surface near the magnetic body 6a of the primary coil L1a is set to 60 mm, and the upper outer size Dt of the upper coil surface close to the cover 7a is set to 10 mm. Has been.

The magnetic body 6a is a regular octagonal plate made of a soft magnetic material. By connecting and fixing the magnetic body 6a to one (lower) winding end of the primary coil L1a, the magnetic body 6a is connected and fixed to the lower coil surface of the primary coil L1a. The regular octagonal magnetic body 6a is formed to have the same outer size as the lower outer size Db (= 60 mm) of the primary coil L1a.

The cover 7a is a regular octagonal plate made of resin made of an insulating material. By connecting and fixing the cover 7a to the other (upper) winding end of the primary coil L1a, the cover 7a is connected and fixed to the upper coil surface of the primary coil L1a. The regular octagonal cover 7a is formed to have the same outer size as the upper outer size Dt (= 10 mm) of the primary coil L1a.

In the first primary coil block 5a configured as described above, the central axis of the regular octagonal pyramidal primary coil L1a passes through the center point of the lower coil surface and the center point of the upper coil surface.
(Second primary coil block 5b)
As shown in FIG. 21, the second primary coil block 5b has an inverted regular octagonal truncated pyramid shape disposed between the magnetic body 6b disposed on the lower side and the cover 7b disposed on the upper side. The primary coil L1b having the outer shape is included. The primary coil L1b has an octagonal cross section, and is formed so that the cross-sectional shape increases as it goes from the lower magnetic body 6b to the upper cover 7b. That is, the primary coil L1b has an outer shape of an inverted regular octagonal truncated pyramid that increases in diameter toward the upper side.

Then, as shown in FIG. 22, the lower outer size Db of the lower coil surface near the magnetic body 6b of the primary coil L1b is set to 10 mm, and the upper outer size Dt of the upper coil surface close to the cover 7b is set to 60 mm. Has been.

The magnetic body 6b is a regular octagonal plate made of a soft magnetic material. By connecting and fixing the magnetic body 6b with one (lower side) winding end of the primary coil L1b, the magnetic body 6b is connected and fixed to the lower coil surface of the primary coil L1b. The regular octagonal magnetic body 6b is formed to have the same outer size as the lower outer size Db (= 10 mm) of the primary coil L1b.

The cover 7b is a resin-made regular octagonal plate made of an insulating material. By connecting and fixing the cover 7b to the other (upper) winding end of the primary coil L1b, the cover 7b is connected and fixed to the upper coil surface of the primary coil L1b. The regular octagonal cover 7b is formed to have the same outer size as the upper outer size Dt (= 60 mm) of the primary coil L1b.

In the second primary coil block 5b configured as described above, the central axis of the inverted regular octagonal pyramidal primary coil L1b passes through the center point of the lower coil surface and the center point of the upper coil surface.

Next, an arrangement method of the first primary coil block 5a and the second primary coil block 5b will be described. For convenience of explanation, the first primary coil block 5a and the second primary coil block 5b arranged in the four power feeding areas AR1 adjacent to each other will be described.

23 and 24 show a layout view and a side view of two first primary coil blocks 5a and two second primary coil blocks 5b adjacent to each other.

As shown in FIG. 23, a virtual square in which two primary coils L1a (first primary coil block 5a) whose diameter is expanded on the lower side surround the first and second primary coil blocks 5a and 5b. Arranged on the first diagonal of the frame. At this time, the magnetic body 6a of the first primary coil block 5a is disposed on the lower side, and the cover 7a is disposed on the upper side. Then, one side of the magnetic body 6a of the first primary coil block 5a adjacent to each other on the first diagonal line is brought into contact with each other.

On the other hand, the two primary coils L1b (second primary coil block 5b) whose upper diameter is enlarged are arranged on the second diagonal line orthogonal to the first diagonal line. At this time, the magnetic body 6b of the second primary coil block 5b is disposed on the lower side, and the cover 7b is disposed on the upper side. Then, one side of the cover 7b of the second primary coil block 5b adjacent to each other on the second diagonal line is brought into contact with each other.

At this time, the first primary coil block 5a is a regular octagonal pyramid-shaped primary coil L1a whose diameter is reduced toward the upper side, and the second primary coil block 5b is an inverse whose diameter is increased toward the upper side. This is a regular octagonal frustum-shaped primary coil L1b. Accordingly, the outer surfaces of the primary coil L1a and the primary coil L1b partially overlap each other. That is, the outer surfaces of the two first primary coil blocks 5a adjacent to each other overlap the outer surfaces of the two second primary coil blocks 5b adjacent to each other when viewed from above. .

Therefore, also in the present embodiment, the outer surfaces of the primary coils L1a and L1b adjacent to each other overlap each other at the boundary portion of the plurality of power feeding areas AR1 formed on the mounting surface 3, and this boundary portion Has a constant width D. As a result, the magnetic flux between the primary coils L1a and L1b adjacent to each other is averaged, and the magnetic flux density can be made uniform.

As described above, the present embodiment can obtain the effects (1) to (3) as in the first embodiment.

The above embodiment may be modified as follows.

In the primary coil block 5 of the first embodiment, the central axis Cx of the primary coil L1 having a square cross section is biased in the diagonal direction of the coil cross section.

As shown in FIG. 25, the central axis Cx of the primary coil L1 having a quadrangular cross section is biased in a direction perpendicular to the one side at an intermediate position on one side of the coil cross section. Thus, the primary coil block 5 may be formed. In this case, the primary coil blocks 5 need to be provided in a line in the direction of bias.

In the above embodiment, twelve power supply areas AR1 are formed on the placement surface 3 of the power supply apparatus 1. However, the present invention is not limited to this, and the power supply apparatus 1 includes two or more power supply areas AR1. You may prepare.

In the third embodiment, the first primary coil block 5a having a regular octagonal truncated pyramid shape and the second primary coil block 5b having a regular inverted octagonal truncated pyramid shape are used. The first primary coil block (second primary coil block) is a regular polygonal frustum shape such as a regular triangular frustum shape (a regular and reverse triangular frustum shape), a regular hexagonal frustum shape (a regular and reverse hexagonal frustum shape), etc. It may have a (reverse polygon frustum shape).

Of course, the first primary coil block (second primary coil block) having a regular polygonal frustum shape (normal and reverse polygonal frustum shape) is the first primary coil having a truncated cone shape (reverse frustoconical shape). It is assumed to include a block (second primary coil block).

Claims

A non-contact power feeding device that feeds secondary power to a secondary coil provided in a power receiving device of an electrical device using an electromagnetic induction phenomenon, wherein the non-contact power feeding device includes a plurality of power feeding areas, In the contact power supply device,
A plurality of primary coils provided corresponding to the plurality of power feeding areas respectively;
Each primary coil is wound around a central axis, each primary coil has an outer shape biased in a direction perpendicular to the central axis direction, and the plurality of primary coils are the central axis A portion of the outer surface of the primary coil that is provided along the direction orthogonal to the direction and that corresponds to the feeding areas adjacent to each other overlaps each other when viewed from the central axis direction. Contact power supply device.
The contactless power supply device according to claim 1,
Each said primary coil is a non-contact electric power feeder which has a square-shaped cross section.
The contactless power supply device according to claim 1,
Each primary coil has an outer shape that expands from one winding end toward the other winding end, and the primary coils adjacent to each other are arranged to have different coil directions. Contact power supply device.
In the non-contact electric power feeder of Claim 3,
Each of the primary coils has a regular polygonal frustum-shaped outer shape, the primary coils adjacent to each other have different coil directions, and the outer surfaces of the primary coils adjacent to each other overlap each other. A non-contact power feeding device arranged as described above.
In the non-contact electric power feeder of Claim 4,
Each said primary coil is a non-contact electric power feeder which has a regular octagonal frustum-shaped external shape.
A primary coil block of a non-contact power feeding device that feeds secondary power to a secondary coil provided in a power receiving device of an electrical device using an electromagnetic induction phenomenon,
A primary coil having first and second winding ends and wound around a central axis, wherein the primary coil has an outer shape biased in a direction perpendicular to the central axis direction; A primary coil;
A magnetic body disposed at the first winding end;
The primary coil block of a non-contact electric power feeder provided with the cover which consists of an insulating material arrange | positioned at the said 2nd winding end.
In the primary coil block of the non-contact power feeding device according to claim 6,
The primary coil has a quadrangular cross section, and a central axis of the primary coil is biased in a direction perpendicular to the one side at an intermediate position of one side of the cross section. Primary coil block of the power feeding device.
In the primary coil block of the non-contact power feeding device according to claim 6,
The primary coil block of the non-contact power feeding device, wherein the primary coil has a rectangular cross section, and a central axis of the primary coil is biased in a diagonal direction of the cross section.
In the primary coil block of the non-contact power feeding device according to any one of claims 6 to 8,
The primary coil is a primary coil block of a non-contact power feeding device, in which the central axis is wound so that the central axis coincides with the central point of the magnetic body and the central point of the cover.
A primary coil block of a non-contact power feeding device that feeds secondary power to a secondary coil provided in a power receiving device of an electrical device using an electromagnetic induction phenomenon,
A primary coil having an outer shape of a regular polygonal frustum, wherein the primary coil has first and second winding ends;
A magnetic body disposed at the first winding end;
The primary coil block of a non-contact electric power feeder provided with the cover which consists of an insulating material arrange | positioned at the said 2nd winding end.
In the primary coil block of the non-contact power feeding device according to claim 10,
The primary coil is a primary coil block of a non-contact power feeding device having a regular octagonal truncated pyramid shape.