JP2013089728A - Non-contact power supply device and primary coil block thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact power supply device capable of supplying power with high efficiency to the secondary coil of a power receiving device without increasing the number of primary coils, even if an electric apparatus is mounted at any position of the mounting surface, and to provide the primary coil block of the non-contact power supply device.SOLUTION: A primary coil L1 fixed between a magnetic body 6 and a cover 7 has a square section similarly to shapes of the magnetic body 6 and the cover 7. The primary coil L1 having square cross section is wound from the magnetic body 6 toward the cover 7 on the upper side, and the central axis of the coil is biased gradually in the horizontal direction toward the upper side. The central axis of the primary coil L1 is biased in the diagonal direction of coil cross section.

Description

  The present invention relates to a contactless power supply device and a primary coil block of the contactless power supply device.

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

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

  However, in the non-contact power supply apparatus in which the primary coil is provided for each power supply area formed in a plurality of sections on a wide mounting surface, the primary coils in each power supply area are provided adjacent to each other. Coil fluxes 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 device, the secondary coil is affected by the magnetic flux of the 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, when the secondary coil is disposed in the vicinity of the intermediate position with respect to the adjacent primary coil, the secondary power of the secondary coil L2 becomes small. That is, there is a large difference in power supply efficiency depending on the position where the electric device is placed.

In other words, since the power supply efficiency greatly depends on the position where the electric device is mounted on the mounting surface of the non-contact power supply device, it is not practical.
Therefore, in Patent Document 1, the dense array arrangement layer of the primary coil has two layers, and the coil center is shifted and overlapped.

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

  However, in the power feeding device, since the dense array arrangement layer of the primary coil is two layers, there is a problem that the coil becomes thick and the entire device 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 problems, and the purpose thereof is to increase the number of primary coils, and the secondary coil of the power receiving device can be mounted on any position without placing an electrical device. An object of the present invention is to provide a non-contact power feeding device that can reduce the difference in the amount of power received and can supply power with high efficiency. Furthermore, it 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 problems, a non-contact power feeding device according to the present invention includes a plurality of adjacent power feeding areas, a primary coil is provided in each of the power feeding areas, and the primary coil is excited to use an electromagnetic induction phenomenon. A non-contact power feeding device that feeds secondary power to a secondary coil provided in a power receiving device of an electrical device, wherein the primary coil provided in each power feeding area is wound in a central axis direction, In addition, the outer shape of the coil is biased in a direction orthogonal to the central axis, and the biased primary coils are provided in the orthogonal direction so as to be partially outside the primary coil of the adjacent feeding area. It is characterized by overlapping each other when viewed from the axial direction.

Moreover, the said structure WHEREIN: It is preferable that the coil cross-sectional shape of the said primary coil is a square.
In the above configuration, the primary coil is a coil that expands as the outer shape of the coil moves from one winding end to the other winding end, and adjacent primary coils have different coil directions. It is preferable to arrange them side by side.

  Further, in the above configuration, the primary coil is a coil having a regular polygonal frustum shape, and adjacent primary coils have different coil directions, and the outer surfaces overlap each other. It is preferable to arrange in.

Moreover, the said structure WHEREIN: It is preferable that the said primary coil is a coil whose outer shape is a regular octagonal frustum shape.
In order to solve the above-described problem, the primary coil block of the non-contact power feeding device of the present invention excites the primary coil and applies 2 to the secondary coil provided in the power receiving device of the electric device using the electromagnetic induction phenomenon. A primary coil block of a non-contact power feeding device for feeding secondary power, wherein the coil is wound in the direction of the central axis, and the outer shape of the coil is biased in a direction perpendicular to the central axis, A magnetic material is arranged and fixed at one winding end, and a cover made of an insulating material is arranged and fixed at the other winding end.

  Further, in the above configuration, the primary coil is a coil having a quadrangular cross section, and a deviation direction of a coil central axis of the primary coil is set to an intermediate position on one side formed by the coil cross section. The direction is preferably orthogonal.

  Moreover, the said structure WHEREIN: The said primary coil is a coil with a coil cross section, and it is preferable that the deviation direction of the coil central axis of the said primary coil is a diagonal direction of a coil cross section.

  In the above configuration, the primary coil wound while being biased in a direction orthogonal to the central axis direction is such that the coil central axis is the center point of the magnetic body at one winding end and the other winding end. It is preferable that the coil is wound so as to coincide with the center point of the cover.

  In order to solve the above-described problem, the primary coil block of the non-contact power feeding device of the present invention excites the primary coil and applies 2 to the secondary coil provided in the power receiving device of the electric device using the electromagnetic induction phenomenon. A primary coil block of a non-contact power feeding device for feeding secondary power, wherein the primary coil is a coil having an outer shape of a regular polygonal frustum, and a magnetic body is arranged and fixed at one winding end. At the same time, a cover made of an insulating material is disposed and fixed at the other winding end.

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

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

The whole perspective view which shows the non-contact electric power feeder and electric equipment of a non-contact electric power feeding system. The whole perspective view of a primary coil block. The disassembled perspective view of a primary coil block. The top view of a primary coil. The top view of a primary coil block. The side view of a primary coil block. The top view which shows the state which combined the some primary coil block. The side view which shows the state which combined the some primary coil block. Sectional drawing which shows a secondary coil. It is a figure explaining the state which a secondary coil moves on the adjacent primary coil from one position to the other position, (a) is a figure which shows the state which moves on the conventional primary coil, (b) (A) is a figure which shows the state moved on the primary coil of this embodiment. The graph which shows the output voltage fluctuation rate at the time of a secondary coil moving on the primary coil of the conventional, and the primary coil of embodiment, respectively. The whole primary coil block perspective view of a 2nd embodiment. The disassembled perspective view of a primary coil block similarly. The top view of a primary coil block similarly. The side view of a primary coil block similarly. The top view which shows the state which combined the several primary coil block similarly. The side view which shows the state which combined the several primary coil block similarly. (A) is a perspective view of the 1st primary coil block of 3rd Embodiment, (b) is a perspective view of the 2nd primary coil block similarly. The exploded perspective view of the 1st primary coil block. The side view of the primary coil of a 1st primary coil block similarly. The disassembled perspective view of the 2nd primary coil block similarly. The side view of the primary coil of a 2nd primary coil block similarly. The top view which shows the state which combined the some 1st and 2nd primary coil block similarly. The side view which shows the state which combined the some 1st and 2nd primary coil block similarly. The whole perspective view of the primary coil block for demonstrating another example.

(First embodiment)
Hereinafter, a first embodiment in which a non-contact power feeding device of the present invention is embodied in a non-contact power feeding system 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 contactlessly powered from the power feeding device 1. ing.

  The power feeding device 1 includes a rectangular plate-shaped housing 2, and the upper surface thereof is a flat surface and forms a placement surface 3 on which the device E is placed. On the mounting surface 3, a plurality of rectangular power feeding areas AR1 are defined. In this embodiment, twelve power feeding areas AR1 are defined so that three are arranged in the left-right direction and four are arranged in the front-rear direction. .

A primary coil block 5 is disposed in the housing 2 at a position corresponding to each partitioned feeding 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 the lower coil surface of the primary coil L1, and an upper coil surface of the primary coil L1. The cover 7 is fixed to.

  The magnetic body 6 is a square plate body made of a soft magnetic material in the present embodiment, and is connected to and fixed to one (lower) winding end of the primary coil L1, thereby lower coil surface of the primary coil L1. Are connected and fixed. In this embodiment, the cover 7 is a resin square plate made of an insulating material, and the upper coil surface of the primary coil L1 is connected and fixed to the other (upper) winding end of the primary coil L1. It is connected and fixed. In the present embodiment, the cover 7 is formed in a rectangular shape having the same shape as the magnetic body 6.

  The primary coil L <b> 1 fixed between the magnetic body 6 and the cover 7 is formed of a rectangular coil having the same coil cross-sectional shape as the magnetic body 6 and the cover 7. The primary coil L1 having a rectangular coil cross section is wound from the magnetic body 6 toward the upper cover 7, and the coil center axis Cx (see FIG. 4) is displaced in the horizontal direction as it goes upward.

  More specifically, as shown in FIG. 4, the bias is such that the coil center axis Cx of the primary coil L1 is biased in the diagonal direction of the rectangular coil cross section when viewed from the axial direction. 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 left and right lengths DX0 of the magnetic body 6 (cover 7) and the primary coil L1 are set to a regular square of 42 mm, and the front and rear lengths DY0 are 42 mm. Yes. The axial length H is set to 4,5 mm.

  At this time, the cover 7 is disposed at a position displaced 20 mm on the right side and 20 mm on the rear side with respect to the magnetic body 6. 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, as shown in FIG. 4, the central axis Cx of the primary coil L1 is the center point of the magnetic body 6 (the center point P0 of the lower coil surface) and the center point of the cover 7 (the center of the upper coil surface). A straight line passes through the point P1).

And the primary coil block 5 comprised in this way is arrange | positioned in the housing | casing 2 in the position corresponding to each feeding area AR1 by which division was formed.
Next, an 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 diagram of four adjacent primary coil blocks 5. As shown in FIG. 7, the primary coil blocks 5 are provided side by side in the direction in which they are biased. That is, the magnetic bodies 6 of the four primary coil blocks 5 are arranged adjacent to each other. As a result, the covers 7 of the four primary coil blocks 5 are disposed adjacent to each other on the upper side.

  At this time, the four primary coil blocks 5 are arranged so that the primary coil L1 is biased in the diagonal direction of the rectangular coil cross section, so that as shown in FIG. The side surfaces can be overlapped when viewed from above. Moreover, the outer surfaces of the four adjacent primary coils L1 can be overlapped when viewed from above.

  Therefore, the boundary portion of the power feeding area AR1 partitioned on the placement surface 3 has a certain width D due to the overlap between the outer surfaces of the adjacent primary coils L1. As a result, the magnetic flux between the adjacent primary coils L1 is averaged, and the magnetic flux density can be made uniform.

  Note that a basic power supply unit circuit (not shown) is provided in the primary coil block 5 (primary coil L1) of each power supply area AR1 at a position within the housing 2 that is out of each power supply area AR1. Is provided. Each basic power supply unit circuit excites and drives the primary coil L1 of the corresponding primary coil block 5 alone or in cooperation with the other primary coil L1 to the device E placed in the power supply area AR1. And contactless power supply.

  On the other hand, the device E that receives power from the power feeding device 1 by electromagnetic induction forms a power receiving area AR2 for the power feeding area AR1 of the power feeding device 1 on the lower surface of the housing 10, and has a secondary coil L2 in the housing 10. doing.

  As shown in FIG. 9, the secondary coil L2 is attached to a magnetic body 11 made of a quadrangular plate-like magnetic material. In the present embodiment, the quadrangular 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 secondary coil L2 attached to the magnetic body 11 has a square shape with the same coil cross section as the primary coil L1. The magnetic body 11 to which the secondary coil L2 is attached is arranged and fixed at the position of the power receiving area AR2 in the housing 10.

And when the apparatus E is mounted in the mounting surface 3 of the electric power feeder 1, as for the secondary coil L2, the primary coil L1 of the primary coil block 5 located just under it is feed-excited.
That is, when the power supply device 1 of the device E is placed immediately above the primary coil L1 of the primary coil block 5, the power supply device 1 energizes the primary coil L1. Accordingly, when the power feeding device 1 of the device E is placed immediately above the plurality of primary coils L1 that overlap with each other, the power feeding device 1 feeds and excites the plurality of primary coils L1.

  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 is then converted by a DC / DC converter. It is converted into a desired DC voltage 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 and at the boundary between the power feeding area AR1 and the power feeding area AR1, the power feeding device 1 is positioned immediately below the device E (secondary coil L2). A plurality of primary coils L1 across the boundary are excited and driven.

  Since this boundary portion has a constant width D and the outer surfaces of the adjacent primary coils L1 overlap each other, the magnetic flux between the adjacent primary coils L1 is averaged. As a result, the magnetic flux density can be made uniform, and the secondary coil L2 receives the received secondary power by the power supply excitation of 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, when the four primary coils L1 of the present embodiment are arranged adjacent to each other and the case where four conventional primary coils are arranged adjacently, comparative verification of the power reception efficiency of the secondary coil L2 is performed. went.
FIG. 10A shows a state where four conventional primary coils La are excited in the front-rear and left-right directions. 10 (a), the coil surface of the secondary coil L2 from the position where the coil surface of the secondary coil L2 faces the coil surface of the primary coil La on the left front side is arranged on the coil surface of the primary coil La on the left rear side. Move to the position that is directly opposite.

  At this time, the output received by the secondary coil L2 at each moving position 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 has been received 100%.

  As is apparent from the output voltage line V1 in FIG. 11, in the case of the conventional primary coil La, the output of the secondary coil L2 becomes 100% at the position facing the secondary coil L2, and the primary coils L1 and 1 The output is the minimum at the intermediate position of the next coil L1, and the variation difference is about 57%.

  FIG. 10B shows a state in which the four primary coils L1 of the present embodiment are excited forward and backward and left and right. 10B, the secondary coil L2 is moved from the relative position where the coil surface of the secondary coil L2 directly faces the lower coil surface of the front left primary coil L1. Move to a relative position facing the lower coil surface.

And the output which the secondary coil L2 receives in each moving position was obtained as shown to the output voltage line V2 of FIG.
As is apparent from the output voltage line V2 in FIG. 11, in the case of the primary coil L1 of the present embodiment, the output of the secondary coil L2 is 50% at the directly facing position with the secondary coil L2, but the primary coil L1 is primary. A minimum output is obtained at an intermediate position between the coil L1 and the primary coil L1, and the fluctuation difference is 41%.

  Therefore, compared to the conventional primary coil La, the output of the power received by the secondary coil L2 is no matter where the secondary coil L2 (device E) is placed on the primary coil L1 (mounting surface 3). It can be seen that the difference in fluctuation is small.

Next, effects of the embodiment configured as described above will be described below.
(1) According to the embodiment, the primary coil L1 provided in each power supply area AR1 is wound in the central axis direction, and the coil outer shape is biased in a direction orthogonal to the central axis direction. The outer surfaces of the primary coil L1 in the adjacent power supply area AR1 were overlapped.

  Accordingly, the boundary portion of the feeding area AR1 defined on the placement surface 3 is formed with a certain width D due to the overlap between the outer surfaces of the adjacent primary coils L1, so that the adjacent primary coils L1. The magnetic flux between them is averaged, and the magnetic flux density can be made uniform.

  As a result, regardless of the position on the placement surface 3 where the device E is mounted, the difference in fluctuation of the secondary power received by the secondary coil L2 at each position can be reduced. That is, the bias of the secondary power received by the secondary coil L2 can be greatly reduced depending on the position where the device E is placed on the placement surface 3. In other words, when mounting on the mounting surface 3, the device E can be mounted without worrying about the mounting position.

  In addition, the primary coil L1 has its deflection direction deviated in the diagonal direction of the coil cross section by the coil center axis Cx, so that the four outer sides of the primary coil L1 are over the outer side of the adjacent primary coil 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, a blank portion of the excitation magnetic flux can be eliminated without increasing the number of primary coils L1. As a result, the number of primary coils L1 can be reduced, and the number of coils can be reduced and control can be 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-described embodiment, the coil outer shape of the primary coil L1 wound in the central axis direction is biased in a direction orthogonal to the central axis direction, and the primary coil L1 in the adjacent power feeding area AR1 is biased. The outer sides were overlapped. That is, it is not a configuration in which two primary coils L1 are simply stacked one above the other. Therefore, the thickness can be suppressed in the vertical direction, and the power supply device 1 can be downsized.
(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 a characteristic, and other configurations are the same as those in the first embodiment. Therefore, for convenience of explanation, the different primary coil block 5 will be described in detail, and detailed description of portions common to the first embodiment will be omitted.

  In the present embodiment, as shown in FIGS. 12 and 13, the magnetic body 6 and the cover 7 constituting the primary coil block 5 are formed by the same regular square as that of the first embodiment. Further, the primary coil L1 disposed between the magnetic body 6 and the cover 7 is also formed in the same square as the first embodiment in the coil cross-sectional shape.

  And the magnetic body 6 and the cover 7 are different from 1st Embodiment, and are arrange | positioned mutually opposed without biasing. On the other hand, the primary coil L1 disposed between the magnetic body 6 and the cover 7 is a rectangular coil from the lower magnetic body 6 to an intermediate position between the magnetic body 6 and the cover 7, as in the first embodiment. After being biased in the diagonal direction of the cross section, it is biased toward the upper cover 7.

  Therefore, as shown in FIG. 12, the coil center axis Cx of the primary coil L1 starts from 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. A bent straight line passes 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 point of the upper coil surface). With respect to P1), it is arranged at a position displaced 20 mm on the right side and 20 mm on the rear side. In other words, the coil surface at the intermediate position between the magnetic body 6 and the cover 7 is disposed at a position offset by 20 mm on the right side and 20 mm on the rear side with respect to the upper and lower coil surfaces of the primary coil L1.

And the primary coil block 5 comprised in this way is arrange | positioned in each electric power feeding area AR1 corresponding to the inside of the housing | casing 2 and the partition formation.
Next, an 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.

  16 and 17 show a layout view and a side view of four adjacent primary coil blocks 5. As shown in FIG. 15, each primary coil block 5 is provided side by side in the direction in which it is 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 side surface of the rear primary coil L1 and recessed in the biasing direction is fitted with the outer side surface of the front primary coil L1 protruding in the biasing direction. The 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 boundary portion of the power feeding area AR1 partitioned on the placement surface 3 has a certain width D due to the overlap between the outer surfaces of the adjacent primary coils L1. As a result, the magnetic flux between the adjacent primary coils L1 is averaged, and the magnetic flux density can be made uniform.

Thus, 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 a characteristic, and other configurations are the same as those in 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.

In this embodiment, as shown to Fig.18 (a) (b), the 1st primary coil block 5a and the 2nd primary coil block 5b are provided.
(First primary coil block 5a)
As shown in FIG. 19, the first primary coil block 5a includes a primary coil L1a whose outer shape is a regular octagonal truncated pyramid between a magnetic body 6a arranged on the lower side and a cover 7a arranged on the upper side. It is arranged. The primary coil L1a has an octagonal cross-sectional shape, and is formed so that the cross-sectional shape becomes smaller toward the upper cover 7a from the lower magnetic body 6a. That is, the primary coil L1a has an octagonal truncated pyramid-shaped coil shape whose diameter decreases toward the upper side.

As shown in FIG. 20, the lower outer size Db on the magnetic body 6a side of the primary coil L1a is set to 60 mm, and the upper outer size Dt on the cover 7a side is set to 10 mm.
The magnetic body 6a is a regular octagonal plate made of a soft magnetic material, and connects and fixes the lower coil surface of the primary coil L1a by connecting and fixing to one (lower) winding end of the primary coil L1a. It is fixed. The outer shape of the regular octagonal magnetic body 6a is the same size as the lower outer size Db (= 60 mm) of the primary coil L1a.

  The cover 7a is a resin-made regular octagonal plate made of an insulating material, and is connected and fixed to the other (upper) winding end of the primary coil L1a to connect and fix the upper coil surface of the primary coil L1a. doing. The outer size of the regular octagonal cover 7a is the same 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 includes a primary coil having an outer shape of an inverted regular octagonal pyramid between a magnetic body 6b disposed on the lower side and a cover 7b disposed on the upper side. L1b is arranged. The primary coil L1b has an octagonal cross-sectional shape, and is formed so that the cross-sectional shape becomes larger toward the upper cover 7b from the lower magnetic body 6b. That is, the primary coil L1b has a reverse regular octagonal truncated pyramid shape that increases in diameter as the outer shape goes upward.

As shown in FIG. 22, the lower outer size Db of the primary coil L1b on the magnetic body 6b side is set to 10 mm, and the upper outer size Dt on the cover 7b side is set to 60 mm.
The magnetic body 6b is a regular octagonal plate made of a soft magnetic material, and connects and fixes the lower coil surface of the primary coil L1b by connecting and fixing to one (lower) winding end of the primary coil L1b. It is fixed. The external size of the regular octagonal magnetic body 6b is formed to be the same size as the lower external size Db (= 10 mm) of the primary coil L1b.

  The cover 7b is a resin-made regular octagonal plate made of an insulating material, and is connected and fixed to the other (upper) winding end of the primary coil L1b to connect and fix the upper coil surface of the primary coil L1b. doing. The outer size of the regular octagonal cover 7b is the same 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 adjacent power feeding areas AR1 will be described.

23 and 24 show a layout view and a side view of two adjacent first primary coil blocks 5a and two second primary coil blocks 5b.
As shown in FIG. 23, two primary coils L1a (first primary coil block 5a) whose diameter is expanded on the lower side are arranged on a diagonal line between the front right side position and the rear left side position. 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. And one side of the magnetic body 6a of the 1st primary coil block 5a adjacent on a diagonal line is made to contact | abut.

  On the other hand, the two primary coils L1b (second primary coil block 5b) whose upper diameter is enlarged are arranged on the diagonal line between the front left position and the rear right position. 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, the sides of the cover 7b of the second primary coil block 5b adjacent on the diagonal are 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 as it goes upward, and the second primary coil block 5b is an inverse whose diameter increases as it goes upward. 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. In other words, the outer surfaces of the two first primary coil blocks 5a adjacent to each other on the diagonal line on the side of the two second primary coil blocks 5b are two second coil coils adjacent to each other on the diagonal line. It overlaps with the outer surface of the primary coil block 5b when viewed from above.

  Accordingly, also in the present embodiment, the boundary portion of the power feeding area AR1 defined on the placement surface 3 has a certain width D due to the overlap between the outer surfaces of the adjacent primary coils L1a and L1b. . As a result, the magnetic flux between the adjacent primary coils L1a and L1b can be averaged to make the magnetic flux density uniform.

Thus, this embodiment can also obtain the effects (1) to (3), as in the first embodiment.
In addition, you may change the said embodiment as follows.

In the primary coil block 5 of the first embodiment, the central axis Cx of the primary coil L1 having a square coil cross section is biased in the diagonal direction of the coil cross section.
As shown in FIG. 25, this is a primary coil L1 having a square coil cross section, and the deviation direction of the central axis Cx of the primary coil L1 is set to the intermediate position of one side formed by the coil cross section. It may be applied to the primary coil block 5 formed by being biased in the orthogonal direction. In this case, the primary coil blocks 5 need to be provided in a line in the direction of bias.

  In the above embodiment, the twelve power supply areas AR1 are formed on the placement surface 3 of the power supply apparatus 1, but the present invention is not limited to this, and is applied to the power supply apparatus 1 including two or more power supply areas AR1. May be.

  In the third embodiment, the first primary coil block 5a has a regular octagonal truncated pyramid shape and the second primary coil block 5b has a regular reverse octagonal truncated pyramid shape. This is a first primary coil block having a regular polygonal frustum shape (forward / reverse polygonal frustum shape) such as a regular triangular frustum shape (forward / reverse triangular frustum shape) or a regular hexagonal frustum shape (forward / reverse hexagonal frustum shape). You may apply to (2nd primary coil block).

  Of course, the first primary coil block (second primary coil block) having a regular polygonal frustum shape (forward and reverse polygonal frustum shape) has a first primary shape having a truncated cone shape (reverse frustoconical shape). A coil block (second primary coil block) is included.

  DESCRIPTION OF SYMBOLS 1 ... Electric power feeder (non-contact electric power feeder), 2,10 ... Housing, 3 ... Mounting surface, 5 ... Primary coil block, 5a ... 1st primary coil block, 5b ... 2nd primary coil block, 6, 6a, 6b ... Magnetic body, 7, 7a, 7b ... Cover, 11 ... Magnetic body, 12 ... Power receiving device, E ... Electrical equipment (equipment), D ... Width, H, DX0, DY0 ... Length, Cx ... Coil center axis, Db ... lower outer size, Dt ... upper outer size, L1, La, L1a, L1b ... primary coil, L2 ... secondary coil, P0, P1, Pm ... center point, AR1 ... feeding area, AR2 ... power receiving area.

Claims (11)

A plurality of adjacent power supply areas are provided, a primary coil is provided in each of the power supply areas, the primary coil is excited, and secondary power is supplied to a secondary coil provided in a power receiving device of an electrical device using an electromagnetic induction phenomenon. A non-contact power supply device for supplying power,
The primary coil provided in each power supply area is wound in the direction of the central axis, and the outer shape of the coil is biased in a direction perpendicular to the central axis, and the biased primary coils are A non-contact power feeding apparatus, wherein a part of outer surfaces of primary coils in adjacent power feeding areas are overlapped when viewed from the axial direction along with the orthogonal direction. The contactless power supply device according to claim 1,
The non-contact power feeding device according to claim 1, wherein the primary coil has a square cross-sectional shape. The contactless power supply device according to claim 1,
The primary coil is a coil that expands as the outer shape of the coil goes from one winding end to the other winding end, and the adjacent primary coils are arranged side by side in different coil directions. A non-contact power feeding device. In the non-contact electric power feeder of Claim 3,
The primary coil is a coil having a regular polygonal frustum shape, and adjacent primary coils have different coil directions and are arranged so that outer surfaces overlap each other. A non-contact power feeding device. In the non-contact electric power feeder of Claim 4,
The non-contact power feeding apparatus according to claim 1, wherein the primary coil is a coil having a regular octagonal truncated pyramid shape. A primary coil block of a non-contact power feeding device that excites a primary coil and feeds secondary power to a secondary coil provided in a power receiving device of an electrical device using an electromagnetic induction phenomenon,
The primary coil is a coil that is wound in the direction of the central axis, and the outer shape of the coil is biased in a direction orthogonal to the central axis, and a magnetic body is disposed and fixed at one end of the coil. The primary coil block of the non-contact power feeding device is characterized in that a cover made of an insulating material is arranged and fixed at the other winding end. In the primary coil block of the non-contact power feeding device according to claim 6,
The primary coil is a coil having a square coil cross section, and the direction of deviation of the coil central axis of the primary coil is a direction perpendicular to the intermediate position of one side formed by the coil cross section. The primary coil block of the non-contact electric power feeder characterized by these. In the primary coil block of the non-contact power feeding device according to claim 6,
The primary coil is a coil having a quadrangular cross section, and the deflection direction of the coil central axis of the primary coil is a diagonal direction of the coil cross section. block. In the primary coil block of the non-contact power feeding device according to any one of claims 6 to 8,
The primary coil wound while being deviated in a direction perpendicular to the central axis direction has a central axis of the magnetic body at one winding end and a central point of the cover at the other winding end. The primary coil block of the non-contact power feeding device, wherein the primary coil block is wound so as to match. A primary coil block of a non-contact power feeding device that excites a primary coil and feeds secondary power to a secondary coil provided in a power receiving device of an electrical device using an electromagnetic induction phenomenon,
The primary coil is a coil having a regular polygonal frustum shape, and a magnetic body is arranged and fixed at one winding end, and a cover made of an insulating material is arranged and fixed at the other winding end. The primary coil block of the non-contact electric power feeder characterized by these. In the primary coil block of the non-contact power feeding device according to claim 10,
The primary coil block of the non-contact power feeding device, wherein the primary coil is a coil having a regular octagonal truncated pyramid shape.