JP2017212302A - Coil device, non-contact power supply device and non-contact power reception device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil device, a non-contact power supply device and a non-contact power reception device, in which cores are hardly broken if a relatively large load is added thereto.SOLUTION: A coil device 1 includes a coil 2, a plurality of cores 30 and a plurality of plates 4. The coil 2 is configured of a wound lead wire 21. The plurality of cores 30 is magnetically coupled wit the coil 2. The plurality of plates 4 are arranged in a manner to be overlaid with the coil 2 in a predetermined direction. In the plurality of plates 4, one plate 4 out of one pair of plates 4 adjacent in the predetermined direction includes a plurality of core ribs 51 which protrudes in the predetermined direction. The plurality of core ribs 51 is configured to divide a space between one pair of plates 4 into a plurality of housing spaces S1. The plurality of cores 30 are respectively housed in the plurality of housing spaces S1.SELECTED DRAWING: Figure 1

Description

  The present invention generally relates to a coil device, a non-contact power feeding device, and a non-contact power receiving device, and more particularly to a coil device, a non-contact power feeding device, and a non-contact power receiving device that are used to transmit power in a non-contact manner. .

  Conventionally, a non-contact charging device used for non-contact charging using electromagnetic force is known, and is disclosed in, for example, Patent Document 1. The non-contact charging device described in Patent Literature 1 includes a power feeding unit having a power feeding coil. The power feeding unit is installed on the ground so as to be exposed from the ground surface. The power feeding unit feeds power to the power receiving unit using electromagnetic force by supplying a current having a predetermined frequency to the power feeding coil.

JP 2014-193031 A

  By the way, in the non-contact charging device (coil device) as in the conventional example, a core formed of a magnetic material may be used in order to reduce leakage of magnetic flux generated by the feeding coil (coil).

  However, the coil device as described above may be subjected to a relatively large load by being stepped on by the vehicle. For this reason, in such a coil device, a relatively large load is applied to the core, and the core may be damaged.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a coil device, a non-contact power feeding device, and a non-contact power receiving device in which a core is not easily damaged even when a relatively large load is applied.

  A coil device according to one embodiment of the present invention includes a coil, a plurality of cores, and a plurality of plates. The coil is formed by winding a conductive wire. The plurality of cores are magnetically coupled to the coil. The plurality of plates are arranged so as to be stacked in a predetermined direction with respect to the coil. In the plurality of plates, one of the pair of plates adjacent in the predetermined direction includes a plurality of core ribs protruding in the predetermined direction. The plurality of core ribs are configured to divide a space between the pair of plates into a plurality of storage spaces. The plurality of cores are respectively stored in the plurality of storage spaces.

  A contactless power supply device according to one embodiment of the present invention includes the above-described coil device. The coil is configured to supply power in a non-contact manner when an AC voltage is applied from a power supply device.

  A non-contact power receiving device according to one embodiment of the present invention includes the above coil device. The coil is configured to receive power in a non-contact manner from a non-contact power feeding device.

  In the present invention, the core is not easily damaged even when a relatively large load is applied.

FIG. 1A is a plan view of a coil device according to an embodiment of the present invention. FIG. 1B is a cross-sectional view of a main part of the coil device same as above. FIG. 2 is a cross-sectional view of the above coil device. FIG. 3A is a schematic diagram of a non-contact power feeding system using the above coil device. FIG. 3B is a block diagram of a non-contact power feeding system using the above coil device. FIG. 4 is a plan view of an essential part of the above coil device, in which a plurality of coil ribs are provided at intervals. FIG. 5A is a cross-sectional view of a principal part of the coil device same as above. FIG. 5B is a cross-sectional view of the main part of the coil device according to the same, in which a recess is provided in the coil plate. FIG. 6 is a cross-sectional view showing the configuration of the above coil device, in which the core plate is arranged on the upper side of the coil plate. FIG. 7 is a plan view of a coil device according to Modification 1 of the embodiment of the present invention. FIG. 8A is a plan view of a coil device according to Modification 2 of the embodiment of the present invention. FIG. 8B is a plan view of another configuration of the above coil device.

  Hereinafter, a coil device according to an embodiment of the present invention will be described. However, the configuration described below is merely an example of the present invention, and the present invention is not limited to the following configuration, and deviates from the technical idea according to the present invention even if it is other than the following configuration. Various changes can be made in accordance with the design or the like as long as they are not.

  As shown in FIGS. 1A, 1 </ b> B, and 2, the coil device 1 of the present embodiment includes a coil 2, a plurality of cores 30, and a plurality of plates 4. The coil 2 is configured by winding a conducting wire 21. The plurality of cores 30 are magnetically coupled to the coil 2. The plurality of plates 4 are arranged so as to be stacked with respect to the coil 2 in a predetermined direction (vertical direction in FIG. 1B).

  In the plurality of plates 4, one of the pair of plates 4 adjacent in the predetermined direction includes a plurality of core ribs 51 protruding in the predetermined direction. The plurality of core ribs 51 are configured to divide a space between the pair of plates 4 into a plurality of storage spaces S1. The plurality of cores 30 are respectively stored in the plurality of storage spaces S1.

  The coil device 1 of the present embodiment is used as, for example, a non-contact power supply device of a non-contact power supply system. The non-contact power supply system is a system that charges a storage battery mounted on a vehicle by supplying electric power from the power supply coil to the power receiving coil mounted on the vehicle in a non-contact manner.

<Non-contact power supply system>
First, an outline of a non-contact power feeding system 100 in which the coil device 1 of the present embodiment is used as the non-contact power feeding device 300 will be described with reference to FIGS. 3A and 3B. The non-contact power feeding system 100 includes a main unit 200, a non-contact power feeding device 300 having a power feeding coil 301, and a non-contact power receiving device 400 having a power receiving coil 401. The non-contact power receiving apparatus 400 is configured such that output power is supplied from the main unit 200 in a non-contact manner. The output power is power that is supplied from the power supply coil 301 to the power receiving coil 401 in a non-contact manner when an AC voltage is applied from the main unit 200 to the power supply coil 301.

  In the present embodiment, a case where the non-contact power receiving device 400 is mounted on the vehicle 500 will be described as an example. Further, the case where the charging device 501 and the storage battery (battery) 502 mounted on the vehicle 500 are loads will be described as an example. Here, vehicle 500 is an electric vehicle that travels using, for example, electric energy stored in storage battery 502. Here, an electric vehicle that travels by the driving force generated by the electric motor will be described as an example of an electric vehicle. However, the electric vehicle is not limited to an electric vehicle, but may be a hybrid electric vehicle, a two-wheeled vehicle (electric motorcycle), an electric bicycle, or the like. May be.

  The main unit 200 receives electric power supplied from a power source such as a commercial power source (system power source) or a power generation facility such as a solar power generation facility, and supplies output power to the non-contact power receiving apparatus 400 in a non-contact manner. In the present embodiment, a case where AC power is supplied from the commercial power supply AC1 to the main unit 200 will be described as an example. The main unit 200 may be supplied with DC power from a DC power source.

  The main unit 200 is a charging stand installed in a parking lot such as a commercial facility, a public facility, or a housing complex. The non-contact power feeding apparatus 300 is installed on an installation surface 600 such as a parking lot floor or ground. The main unit 200 is electrically connected to the non-contact power feeding device 300 by a cable 700 wired in the ground.

  The main unit 200 supplies output power in a non-contact manner to the non-contact power receiving device 400 of the vehicle 500 parked on the non-contact power supply device 300. At this time, the power receiving coil 401 of the non-contact power receiving device 400 is positioned above the power feeding coil 301 and thereby electromagnetically coupled with the power feeding coil 301 (at least one of electric field coupling and magnetic field coupling). The main unit 200 is configured by housing, for example, a power conversion unit 201, a control unit 202, and a communication unit 203 in a housing.

  The power conversion unit 201 includes, for example, an AC / DC converter circuit and an inverter circuit. The power conversion unit 201 receives AC power supplied from the commercial power supply AC <b> 1 and applies an AC voltage to the feeding coil 301 in accordance with the control of the control unit 202. That is, the power conversion unit 201 is a power supply device that applies an AC voltage to the coil (feeding coil 301). In the present embodiment, the AC / DC converter circuit also functions as a PFC (Power Factor Correction) circuit.

  The control unit 202 controls the power conversion unit 201 so that an AC voltage is applied to the power supply coil 301 (an AC current flows), thereby supplying power from the power supply coil 301 to the power reception coil 401 in a non-contact manner.

  The communication unit 203 is configured to perform wireless communication with the communication unit 405 of the non-contact power receiving apparatus 400 using a communication standard such as a wireless LAN or Bluetooth (registered trademark). The communication between the communication unit 203 and the communication unit 405 may be wireless communication using a communication standard other than the above.

  The non-contact power supply apparatus 300 includes a power supply coil 301 and a pair of capacitors 302 and 303. The feeding coil 301 forms a resonance circuit together with a pair of capacitors 302 and 303.

  The non-contact power receiving apparatus 400 includes a power receiving coil 401 that is electromagnetically coupled to the power feeding coil 301, a pair of capacitors 402 and 403, a rectifying and smoothing circuit 404, and a communication unit 405. A charging device 501 and a storage battery 502 are electrically connected to the output terminal of the non-contact power receiving device 400. The power receiving coil 401 forms a resonance circuit together with a pair of capacitors 402 and 403. The rectifying / smoothing circuit 404 rectifies and smoothes the AC voltage generated between both ends of the power receiving coil 401. The rectifying / smoothing circuit 404 outputs a DC voltage obtained by rectification / smoothing to the charging device 501 and the storage battery 502.

  The non-contact power supply system 100 according to the present embodiment employs a magnetic resonance method (magnetic resonance method) that transmits power by resonating a resonance circuit including the power supply coil 301 and a resonance circuit including the power reception coil 401. Yes. For this reason, the non-contact power feeding system 100 of the present embodiment can transmit the output power of the main unit 200 to the non-contact power receiving apparatus 400 with high efficiency even when the power feeding coil 301 and the power receiving coil 401 are relatively separated from each other. is there. The transmission method of output power from the main unit 200 to the non-contact power receiving apparatus 400 is not limited to the magnetic field resonance method, and may be, for example, an electromagnetic induction method, a microwave transmission method, or the like.

<Coil device>
Hereinafter, the coil apparatus 1 of this embodiment is demonstrated in detail using FIG. 1A, FIG. 1B, and FIG. In the following description, in FIG. 1A, a direction in which a first area A1 and a second area A2 to be described later are aligned will be referred to as an up-and-down direction, and the first area A1 side as viewed from the second area A2 will be upward. Also, in the following, in FIG. 1A, the direction in which a third area A3 and a fourth area A4, which will be described later, are aligned is the left-right direction, the third area A3 side is the left side as viewed from the fourth area A4, and vice versa. Will be described. Further, in the following, in FIG. 2, a direction in which a first plate 41 and a second plate 42 (to be described later) are aligned will be referred to as the front-rear direction, and the first plate 41 side as viewed from the second plate 42 will be referred to as the front. To do.

  FIG. 1B shows a part of a cross section obtained by cutting the first region A1 along a plane orthogonal to the vertical direction. Moreover, FIG. 2 represents the cross section which cut | disconnected the coil apparatus 1 by the plane orthogonal to an up-down direction. In FIG. 1A, illustration of a plurality of plates 4, a casing 6 to be described later, and a metal plate 7 to be described later is omitted, and the coil 2 is illustrated by an imaginary line. Moreover, illustration of the housing | casing 6 is abbreviate | omitted in FIG. 1B.

  1A, 1B, and 2 show arrows indicating directions (up, down, left, right, front, back), but these arrows are described only for the purpose of assisting the explanation. There is nothing but a substance. Further, the definition of the above direction is not intended to limit the usage pattern of the coil device 1 of the present embodiment.

  In the following description, when the first plate 41, the second plate 42, and the third plate 43, which will be described later, are not particularly distinguished, each of these plates 41, 42, and 43 is referred to as “plate 4”. In the following description, each of the layers L11 and L12 is referred to as a “layer L1” unless the first layer L11 and the second layer L12 described below are particularly distinguished.

  As shown in FIGS. 1A, 1B, and 2, the coil device 1 of the present embodiment includes one coil 2, a plurality of cores 30, a plurality of plates 4, a housing 6, and a metal plate 7. It has. In the present embodiment, the plurality of plates 4 includes a first plate 41, a second plate 42, and a third plate 43.

  As shown in FIG. 1A, the coil 2 is configured by winding a conducting wire 21 in a spiral shape in a plan view. That is, the coil 2 is a so-called circular type (spiral type) coil. In the present embodiment, the outer peripheral shape of the coil 2 is rectangular in plan view. Moreover, in this embodiment, the coil 2 is comprised so that a rectangular-shaped space | gap may be provided in the center part by planar view. In addition, the conducting wire 21 may be covered with an insulating film.

  The coil 2 generates magnetic flux when voltage is applied (current flows). The coil 2 receives a magnetic flux generated by another opposing coil and generates a current. In FIG. 2, the coil 2 is configured by winding the conductive wire 21 a plurality of times (here, 6 times), but this is not intended to limit the number of turns of the coil 2. For example, the coil 2 may be configured by winding a larger number of conductive wires 21 or may be configured by winding a smaller number of times. Moreover, in this embodiment, although the coil 2 is comprised by winding the conducting wire 21 with a circular cross section, it is not the meaning which limits the cross-sectional shape of the conducting wire 21. FIG. For example, the coil 2 may be configured by winding a conducting wire 21 having a rectangular cross section. Furthermore, in this embodiment, the coil 2 is composed of one coil, but may be composed of a plurality of coils.

  As shown in FIG. 1A, the coil 2 and the plurality of plates 4 are arranged in a first region A1, a second region A2, a third region A3, a fourth region A4, four fifth regions A5, and a sixth region A6, respectively. It is divided. The first region A1 is a rectangular region that is located on the upper side of each of the coil 2 and the plurality of plates 4 and is long in the left-right direction in plan view. The second region A2 is a rectangular region that is located on the lower side of each of the coil 2 and the plurality of plates 4 and is long in the left-right direction in plan view. The third region A3 is a rectangular region that is located on the left side of each of the coil 2 and the plurality of plates 4 and is long in the vertical direction in plan view.

  4th area | region A4 is located in the right side in each of the coil 2 and the some plate 4, and is a rectangular area | region long in an up-down direction by planar view. The four fifth regions A5 are regions located at the four corners of each of the coil 2 and the plurality of plates 4. The coil 2 is configured in a fan shape in plan view in each of the four fifth regions A5. Hereinafter, a portion corresponding to the fifth region A5 in the coil 2 is referred to as a “curved portion 22”. That is, the coil 2 has the curved portion 22. The sixth area A6 is a rectangular area that is long in the left-right direction in a plan view surrounded by the first area A1 to the fifth area A5.

  The plurality of cores 30 are formed of, for example, a magnetic material such as ferrite so as to have a rectangular shape in plan view (see FIG. 1A). The plurality of cores 30 are arranged so that the magnetic flux generated by the coil 2 passes therethrough. In other words, the plurality of cores 30 are magnetically coupled to the coil 2. In the present embodiment, the plurality of cores 30 are arranged so as to be aligned in the axial direction of the conducting wire 21. Therefore, the magnetic flux generated by the coil 2 passes through each of the plurality of cores 30 in a direction along the long side of the core 30. For this reason, in the coil apparatus 1 of this embodiment, it is easy to prevent the leakage of the magnetic flux which the coil 2 generate | occur | produces, and it is easy to improve magnetic efficiency.

  As shown in FIGS. 1B and 2, the plurality of cores 30 are placed on the front surfaces of the second plate 42 and the third plate 43 of the plurality of plates 4. And as shown to FIG. 1A, the some core 30 is arrange | positioned so that it may align with the axial direction (left-right direction) of the conducting wire 21, for example in 1st area | region A1 and 2nd area | region A2. Further, the plurality of cores 30 are arranged so as to be aligned in the axial direction (vertical direction) of the conducting wire 21 in, for example, the third region A3 and the fourth region A4. Further, for example, in the fifth region A5 (four corners of the coil 2), the core 30 of the first layer L11 described later and the core 30 of the second layer L12 described later are arranged so that the long sides are orthogonal to each other. Yes.

  That is, in the present embodiment, the plurality of cores 30 are arranged so as to be aligned in the axial direction of the conducting wire 21 at least at a part of the portion overlapping the coil 2 in a predetermined direction (front-rear direction). Further, in the present embodiment, the plurality of cores 30 are arranged so as not to line up in a direction orthogonal to the predetermined direction (front-rear direction) and the axial direction of the conducting wire 21 in a portion overlapping the coil 2 in the predetermined direction (front-rear direction). Has been.

  The plurality of plates 4 are formed, for example, of a non-magnetic resin material into a rectangular flat plate in plan view. The resin material is preferably a material that can ensure the flame retardancy, insulation, and moldability required by the plate 4.

  As shown in FIG. 2, the coil 2 is placed on the front surface of the first plate 41 among the plurality of plates 4. In other words, the plurality of plates 4 include a first plate (coil plate) 41 on which the coil 2 is disposed. Specifically, a plurality of coil ribs 52 projecting forward are integrally formed on the front surface of the first plate 41. And by being pinched | interposed into these several ribs 52 for coils, the conducting wire 21 is positioned in the state wound by the spiral shape by planar view. That is, the first plate (coil plate) 41 has a plurality of coil ribs 52 provided between the adjacent conductive wires 21 and protruding in a predetermined direction (front-rear direction).

  For example, as shown in FIG. 4, in the first region A1 and the second region A2, a plurality of coil ribs 52 are arranged in the vertical direction. The conductive wire 21 is sandwiched between a pair of coil ribs 52 adjacent in the vertical direction. A plurality of coil ribs 52 are also arranged in the left-right direction. And the conducting wire 21 is positioned along the left-right direction by the plurality of coil ribs 52 arranged in the left-right direction.

  In this embodiment, the dimension of the predetermined direction (front-back direction) of the some coil rib 52 is larger than the thickness of the conducting wire 21, as shown in FIG. That is, the conducting wire 21 does not protrude forward from the plurality of coil ribs 52. For this reason, for example, even if a relatively large load is applied to the coil device 1 by, for example, the vehicle 500 being stepped on the coil device 1, the plurality of coil ribs 52 receive the load, and thus it is difficult to apply a load to the conductor 21. The conducting wire 21 is difficult to break. Of course, it is arbitrary whether the dimension of the predetermined direction (front-back direction) of the some coil rib 52 is made larger than the thickness of the conducting wire 21. As shown in FIG.

  In the present embodiment, the plurality of plates 4 (the first plate 41, the second plate 42, and the third plate 43) are arranged so as to be stacked in the front-rear direction, as shown in FIGS. 1B and 2. . The first plate (coil plate) 41 is located at the foremost position among the plurality of plates 4. That is, the plurality of plates 4 are arranged so as to be stacked in a predetermined direction (front-rear direction) with respect to the coil 2.

  As shown in FIG. 1B and FIG. 2, a plurality of core ribs 51 projecting forward are integrally formed on the front surface of the second plate 42 of the plurality of plates 4. Similarly, a plurality of core ribs 51 protruding forward are integrally formed on the front surface of the third plate 43 of the plurality of plates 4. That is, in the plurality of plates 4, one plate 4 (second plate 42) of a pair of plates 4 (first plate 41 and second plate 42) adjacent to each other in a predetermined direction (front-rear direction) is in a predetermined direction. A plurality of protruding core ribs 51 are provided. Similarly, in the plurality of plates 4, one plate 4 (third plate 43) of a pair of plates 4 (second plate 42 and third plate 43) adjacent to each other in a predetermined direction (front-rear direction) is in a predetermined direction. A plurality of core ribs 51 are provided.

  In both the second plate 42 and the third plate 43, the plurality of core ribs 51 are provided so as to be arranged at intervals in the axial direction of the conducting wire 21, as shown in FIG. 1B. For example, in the first region A1 and the second region A2, the plurality of core ribs 51 are provided so as to be arranged at intervals in the left-right direction. In the third region A3 and the fourth region A4, the plurality of core ribs 51 are provided so as to be arranged at intervals in the vertical direction.

  As shown in FIG. 1B, the plurality of core ribs 51 are configured to divide the space between the pair of plates 4 into a plurality of storage spaces S1. For example, in the first region A1 and the second region A2, the space between the first plate 41 and the second plate 42 is composed of a plurality of storage spaces S1 by a plurality of core ribs 51 arranged at intervals in the left-right direction. It is divided into. Similarly, in the first region A1 and the second region A2, a space between the second plate 42 and the third plate 43 is a plurality of storage spaces by a plurality of core ribs 51 arranged at intervals in the left-right direction. It is divided into S1.

  And the several core 30 mounted on the front surface of the 2nd plate 42 is each located in the some storage space S1 between the 1st plate 41 and the 2nd plate 42, as shown to FIG. 1B. Similarly, the plurality of cores 30 placed on the front surface of the third plate 43 are respectively positioned in the plurality of storage spaces S <b> 1 between the second plate 42 and the third plate 43. That is, the plurality of cores 30 are respectively stored in the plurality of storage spaces S1.

  Here, the layer L1 is formed by a plurality of storage spaces S1 arranged along a plane orthogonal to a predetermined direction (front-rear direction). Hereinafter, the layer L1 formed between the first plate 41 and the second plate 42 is referred to as “first layer L11”, and the layer L1 formed between the second plate 42 and the third plate 43 is referred to as “first layer L11”. It is referred to as “two layers L12”. Hereinafter, the plurality of cores 30 arranged in one layer L1 are referred to as “core group 3”. That is, the coil device 1 of the present embodiment includes a plurality of layers L1 in which a plurality of storage spaces S1 are formed. The coil device 1 includes a plurality of core groups 3 with the plurality of cores 30 as one core group 3.

  The first layer L11 and the second layer L12 are provided side by side in the front-rear direction. The core group 3 is disposed in each of the first layer L11 and the second layer L12. That is, the plurality of layers L1 (the first layer L11 and the second layer L12) are provided side by side in a predetermined direction (front-rear direction). The plurality of layers L1 include a first layer L11 and a second layer L12 that are adjacent in a predetermined direction (front-rear direction). The plurality of core groups 3 are arranged in each of the plurality of layers L1.

  In the present embodiment, the dimension in the predetermined direction (front-rear direction) of the plurality of core ribs 51 is larger than the thickness of the plurality of cores 30. For example, as shown in FIG. 5A, when the thickness of the core 30 is “H1” and the height of the core rib 51 in a predetermined direction (front-rear direction) is “H2”, the core rib 51 and the core 30 are “H2”. The relation “≧ H1” is satisfied. That is, the plurality of cores 30 are arranged so as not to contact the first plate (coil plate) 41 in a state where no load is applied to the coil device 1.

  In the present embodiment, as shown in FIG. 1B, the plurality of core ribs 51 provided on the second plate 42 and the plurality of core ribs 51 provided on the third plate 43 are predetermined. It arrange | positions so that it may not mutually overlap in a direction (front-back direction). In other words, the plurality of core ribs 51 of each of the plurality of layers L1 are arranged so as not to overlap each other in a predetermined direction (front-rear direction). For this reason, the plurality of cores 30 of the first layer L11 and the plurality of cores 30 of the second layer L12 are arranged to overlap each other in a predetermined direction (front-rear direction).

  As shown in FIG. 2, the housing 6 includes a cover 61 and a base 62. The cover 61 is formed in a rectangular parallelepiped shape whose rear surface is opened by a resin material such as FRP (Fiber Reinforced Plastics). The base 62 is formed into a rectangular flat plate in a plan view using a resin material such as FRP, for example. The housing 6 is configured by coupling the rear end of the cover 61 to the front surface of the base 62. A coil 2, a plurality of plates 4, and a metal plate 7 are accommodated inside the housing 6.

  The metal plate 7 is a rectangular flat plate formed in a plan view made of a metal material such as aluminum. As shown in FIGS. 1B and 2, the metal plate 7 is disposed below the third plate 43 in a predetermined direction (front-rear direction). The metal plate 7 has a magnetic shielding function that shields the leakage magnetic flux generated by the coil 2. In addition, the metal plate 7 has a heat dissipation function for releasing heat generated by current flowing through the coil 2 to the installation surface where the coil device 1 is installed. Note that whether or not the coil device 1 includes the metal plate 7 is arbitrary.

  By the way, in the coil apparatus 1 of this embodiment, although the several core 30 is provided for every layer L1, instead of the several core 30, one core which has an area equivalent to the total area of the several core 30 It is also conceivable to provide for each layer L1. Hereinafter, the problem of the coil device including one core for each layer L1 (hereinafter referred to as “coil device of comparative example”) will be described.

  The coil device of the comparative example has a problem that it is difficult to form a single core in the first place. This is because a core having an area equivalent to the total area of the plurality of cores 30 is relatively large, and it is necessary to prepare a dedicated mold and apparatus in order to form such a core. . Therefore, the coil device of the comparative example has a problem that the manufacturing cost increases because one core is formed. Further, the coil device of the comparative example has a problem that the core is easily damaged when a relatively large load (for example, several hundred kg) is applied, for example, by being stepped on the vehicle 500.

  On the other hand, in the coil device 1 of the present embodiment, the space between the pair of plates 4 is divided into a plurality of storage spaces S1 by a plurality of core ribs 51. A plurality of cores 30 are respectively stored in the plurality of storage spaces S1. For this reason, in the coil device 1 of the present embodiment, even if a relatively large load is applied, for example, by being stepped on the vehicle 500, the load is distributed to the plurality of cores 30, so that it is compared with the coil device of the comparative example. Thus, the core 30 is difficult to break. Moreover, in the coil apparatus 1 of this embodiment, each of the several core 30 is small compared with the core of the coil apparatus of a comparative example. For this reason, in the coil apparatus 1 of this embodiment, since each core 30 is easy to shape | mold, for example, it is also possible to shape | mold using a general purpose metal mold | die, manufacture is easy and manufacturing cost is also high. Less is enough.

  Furthermore, in the coil device 1 of the present embodiment, the core rib 51 is provided between the adjacent cores 30. For this reason, in the coil device 1 according to the present embodiment, even if a relatively large load is applied, the load is distributed to the plurality of core ribs 51, so that it is difficult to directly apply the load to the plurality of cores 30. Therefore, in the coil device 1 of the present embodiment, the strength against the load can be improved as compared with the case where the plurality of core ribs 51 are not provided.

  In the coil device 1 of the present embodiment, the dimensions of the plurality of core ribs 51 are larger than the thickness of the plurality of cores 30 in a predetermined direction. That is, in the coil device 1 according to the present embodiment, as shown in FIG. 5A, a gap is provided between the core 30 and the first plate 41 in the storage space S1. For this reason, in the coil device 1 of the present embodiment, even if a relatively large load is applied to the coil device 1 such as when the coil device 1 is stepped on the vehicle 500, the plurality of cores 30 are Since the core rib 51 receives a load, it is difficult to apply a load to the plurality of cores 30. In other words, when a relatively large load is applied to the coil device 1, the first plate 41 bends backward when the plurality of core ribs 51 receive the load. However, since there is a gap in the storage space S <b> 1, One plate 41 is difficult to contact the core 30. It should be noted that whether or not the dimension of the plurality of core ribs 51 in the predetermined direction (front-rear direction) is larger than the thickness of the core 30 is arbitrary.

  For example, as shown in FIG. 5B, even when the dimension in the predetermined direction (front-rear direction) of the plurality of core ribs 51 is smaller than the thickness of the core 30 (that is, “H2 <H1”), the core 30 in the storage space S1. It is possible to provide a gap between the first plate 41 and the first plate 41. That is, in the configuration shown in FIG. 5B, a gap is provided in the storage space S <b> 1 by providing a concave portion 53 that is recessed forward on the rear surface of the first plate 41. Here, when the depth of the recess 53 in the predetermined direction (front-rear direction) is “H3”, the core rib 51, the core 30, and the recess 53 satisfy the relationship “H2 + H3 ≧ H1”.

  As described above, it is also possible to provide a gap in the storage space S1 by providing the recess 53 in the first plate 41 (that is, the plate 4 that does not include the core rib 51 of the pair of plates 4). And in this structure, since the height dimension of the several rib 51 for cores can be made small, it is possible to make the height dimension of the coil apparatus 1 small. Note that the first plate 41 does not need to be provided with the recess 53 as long as the space is provided in the storage space S <b> 1 with only the plurality of core ribs 51. In this configuration, since the rear surface of the first plate 41 may be formed as a flat surface, the design of the first plate 41 is easy.

  Moreover, in the coil apparatus 1 of this embodiment, the several plate 4 contains the 1st plate (plate for coils) 41 in which the coil 2 is arrange | positioned. The first plate (coil plate) 41 includes a plurality of coil ribs 52 provided between the adjacent conductors 21 and protruding in a predetermined direction (front-rear direction). For this reason, in the coil apparatus 1 of this embodiment, even if a comparatively big load is added, since a load is disperse | distributed to the several rib 52 for coils, the intensity | strength with respect to the load of the coil apparatus 1 can be improved. Whether or not the plurality of coil ribs 52 are provided on the first plate (coil plate) 41 is arbitrary.

  In the coil device 1 of the present embodiment, for example, as shown in FIG. 4, at least a part of the plurality of core ribs 51 and at least a part of the plurality of coil ribs 52 are in a predetermined direction (front-rear direction). It may be configured to overlap. In this configuration, the core rib 51 and the coil rib 52 that overlap in a predetermined direction (front-rear direction) function like a single column, whereby the strength against the load of the coil device 1 can be further improved. The core rib 51 and the coil rib 52 that overlap in a predetermined direction may be integrally formed.

  Moreover, in the coil apparatus 1 of this embodiment, the several core 30 is arrange | positioned so that it may align with the axial direction of the conducting wire 21 in the at least one part of the site | part which overlaps with the coil 2 in a predetermined direction. For this reason, in the coil apparatus 1 of this embodiment, the magnetic flux which the coil 2 generate | occur | produces easily passes through the several core 30, and can reduce a magnetic loss. Note that whether or not to adopt the configuration is arbitrary.

  In particular, in the coil device 1 according to the present embodiment, the plurality of cores 30 are arranged so as not to line up in a direction orthogonal to the predetermined direction and the axial direction at a portion overlapping the coil 2 in the predetermined direction. That is, in the portion overlapping the coil 2 in the predetermined direction, the plurality of cores 30 are not arranged so as to be aligned along the path (magnetic path) of the magnetic flux generated by the coil 2. For this reason, in the coil apparatus 1 of this embodiment, a magnetic loss can be reduced compared with the case where a some core is arranged side by side along a magnetic path. Note that whether or not to adopt the configuration is arbitrary.

  In addition, the coil device 1 of the present embodiment includes a plurality of layers L1 in which a plurality of storage spaces S1 are formed. The coil device 1 includes a plurality of core groups 3 with the plurality of cores 30 as one core group 3. The plurality of layers L1 are provided side by side in a predetermined direction. The plurality of core groups 3 are arranged in each of the plurality of layers L1. That is, the coil device 1 according to the present embodiment does not include only one layer L1 including the core group 3, but includes a plurality of layers L1 including the core group 3. For this reason, in the coil apparatus 1 of this embodiment, compared with the case where it has only one layer L1 provided with the core group 3, since the magnetic flux which the coil 2 generate | occur | produces passes the some core 30 easily, a magnetic loss is reduced. can do. Note that whether or not to adopt the configuration is arbitrary.

  In particular, in the coil device 1 of the present embodiment, the plurality of core ribs 51 of each of the plurality of layers L1 are arranged so as not to overlap each other in a predetermined direction. That is, in the coil device 1 of the present embodiment, the plurality of cores 30 of each of the plurality of layers L1 are arranged so as to overlap each other in a predetermined direction (front-rear direction). For this reason, in the coil apparatus 1 of this embodiment, the space | gap between the adjacent cores 30 can be made small by planar view, and a leakage magnetic flux can be reduced. Note that whether or not to adopt the configuration is arbitrary.

  Moreover, in the coil apparatus 1 of this embodiment, the outer periphery shape of the coil 2 is a rectangular shape by planar view. Further, the plurality of cores 30 have a rectangular shape in plan view. The plurality of layers L1 include a first layer L11 and a second layer L12 that are adjacent in a predetermined direction. The plurality of cores 30 of the first layer L11 and the plurality of cores 30 of the second layer L12 are arranged at the four corners of the coil 2 so that the long sides are orthogonal to each other. That is, in the coil device 1 according to the present embodiment, a plurality of cores 30 having the same shape (here, rectangular in plan view) are arranged at any of the four corners of the coil 2 and the portions other than the four corners of the coil 2. be able to. For this reason, in the coil device 1 of the present embodiment, the types of the shapes of the plurality of cores 30 can be reduced, and the types of molds necessary for forming the plurality of cores 30 can also be reduced. Manufacturing costs can be reduced. Note that whether or not to adopt the configuration is arbitrary.

  By the way, although the coil apparatus 1 of this embodiment is comprised so that the other plate 4 (2nd plate 42 and 3rd plate 43) may be arrange | positioned behind the 1st plate (plate for coils) 41, others It may be configured as follows. For example, the coil device 1 may be configured to dispose another plate 4 (the second plate 42 and the third plate 43) in front of the first plate (coil plate) 41.

  In addition, the coil device 1 is configured to dispose other plates 4 (second plate 42 and third plate 43) on both front and rear sides of a first plate (coil plate) 41, for example, as shown in FIG. 6. It may be. In this case, the cover 61 and the third plate 43 correspond to the pair of plates 4 that form the second layer L12.

  In the present embodiment, the outer peripheral shapes of the coil 2 and the plurality of plates 4 are all rectangular in plan view, but may be other shapes. For example, the outer peripheral shapes of the coil 2 and the plurality of plates 4 may each be a square shape in a plan view, or may be a circular shape in a plan view as in a coil device 1B of Modification 2 described later. .

  In the present embodiment, the long side of the core 30 is preferably longer than the width of the coil 2. Here, the width of the coil 2 is a length in a direction orthogonal to the predetermined direction (front-rear direction) and the axial direction of the coil 2. For example, in the first region A1, the width of the coil 2 is the length of the coil 2 in the vertical direction. In this configuration, since the magnetic flux generated by the coil 2 easily passes through the core 30, leakage of magnetic flux can be reduced.

(Modification 1)
Hereinafter, a coil device 1A according to Modification 1 of the embodiment will be described with reference to FIG. However, below, description is abbreviate | omitted about the structure which is common in the coil apparatus 1 of embodiment. In FIG. 7, the illustration of the plurality of plates 4, the housing 6, and the metal plate 7 is omitted, and the coil 2 is illustrated by imaginary lines.

  In the coil device 1 </ b> A of the present modification, a plurality of cores 30 </ b> A are disposed in each of the curved portions 22 at the four corners of the coil 2 as shown in FIG. 7. The core 30A is formed in a triangular shape in a plan view, for example, with a magnetic material such as ferrite. The plurality of cores 30 </ b> A are arranged so as to be aligned in the circumferential direction of the bending portion 22 in each of the bending portions 22 at the four corners of the coil 2.

  In the present modification, the plurality of core ribs 51 of the second plate 42 and the plurality of core ribs 51 of the third plate 43 are arranged so as not to overlap each other in a predetermined direction (front-rear direction). . For this reason, the plurality of cores 30A of the first layer L11 and the plurality of cores 30A of the second layer L12 are arranged so as to overlap each other in a predetermined direction (front-rear direction).

  As described above, in the coil device 1 </ b> A according to this modification, the coil 2 has the bending portion 22. The plurality of layers L1 include a first layer L11 and a second layer L12 that are adjacent in a predetermined direction. Of the plurality of cores 30, the core 30 </ b> A disposed in the curved portion 22 has a triangular shape in plan view. The plurality of cores 30 </ b> A of the first layer L <b> 11 and the plurality of cores 30 </ b> A of the second layer L <b> 12 are arranged in the bending portion 22 so as to be aligned in the circumferential direction of the bending portion 22. For this reason, in coil device 1A of this modification, also in curved part 22 of coil 2, the space between cores 30A adjacent in a plan view can be reduced, and leakage magnetic flux can be reduced. Note that whether or not to adopt the configuration is arbitrary.

(Modification 2)
Hereinafter, a coil device 1B according to Modification 2 of the embodiment will be described with reference to FIGS. 8A and 8B. However, below, description is abbreviate | omitted about the structure which is common in the coil apparatus 1 of Embodiment 1. FIG. 8A and 8B, illustration of the plurality of plates 4, the casing 6, and the metal plate 7 is omitted, and the coil 2A is illustrated by an imaginary line.

  As shown in FIG. 8A, the coil device 1 </ b> B of this modification includes a coil 2 </ b> A instead of the coil 2. In addition, the coil device 1 </ b> B according to this modification includes a plurality of cores 30 </ b> B instead of the plurality of cores 30.

  The coil 2A is a circular type coil like the coil 2, and is formed in an annular shape in plan view. That is, it can be said that the coil 2 </ b> A includes only the bending portion 22, unlike the coil 2 of the embodiment. Although not shown, in the present modification, the plurality of plates 4 are each formed in a circular shape in plan view. The core 30B is formed in a rectangular shape in a plan view, for example, with a magnetic material such as ferrite. The plurality of cores 30B are arranged so as to be aligned in the axial direction of the conducting wire 21 (that is, the circumferential direction of the coil 2A).

  In the present modification, the plurality of core ribs 51 of the second plate 42 and the plurality of core ribs 51 of the third plate 43 are arranged so as not to overlap each other in a predetermined direction (front-rear direction). . For this reason, the plurality of cores 30B of the first layer L11 and the plurality of cores 30B of the second layer L12 are arranged so as to overlap each other in a predetermined direction (front-rear direction).

  In the coil device 1 </ b> B of this modification, a plurality of cores 30 </ b> B having the same shape (here, a rectangular shape in plan view) can be arranged at any part of the coil 2. For this reason, in the coil device 1B of the present modification, the types of shapes of the plurality of cores 30B can be reduced, and the types of molds necessary for forming the plurality of cores 30B can also be reduced. Manufacturing costs can be reduced.

  Moreover, the coil apparatus 1B of the present modification may include a plurality of cores 30C instead of the plurality of cores 30B, as shown in FIG. 8B, for example. The core 30C is formed in a trapezoidal shape in plan view, for example, with a magnetic material such as ferrite. Further, the core 30 </ b> C has one side on the outer peripheral side of the coil 2 longer than one side on the center side of the coil 2 in plan view. The plurality of cores 30C are arranged so as to be aligned in the axial direction of the conducting wire 21 (that is, the circumferential direction of the coil 2A). In this configuration, as compared with the configuration shown in FIG. 8A, the gap between the cores 30C adjacent to each other in plan view can be reduced, so that the leakage magnetic flux can be further reduced.

  The coil devices 1, 1 </ b> A, and 1 </ b> B each include the three plates 4, but may include a plurality of plates 4. That is, the coil devices 1, 1 </ b> A, 1 </ b> B may include two plates 4 or four or more plates 4. For example, when the coil device 1 includes n (n is a natural number of 4 or more) plates 4, the coil device 1 has n−1 layers L1.

  In addition, the above-described coil devices 1, 1 </ b> A, 1 </ b> B are all used as the non-contact power supply device 300 in the non-contact power supply system 100. In other words, the non-contact power feeding device 300 includes a coil device (1, 1A, 1B). The coil 2 is configured to supply power in a non-contact manner when an AC voltage is applied from a power supply device (here, the power conversion unit 201). In the non-contact power supply apparatus 300, the core 30 is not easily damaged even when a relatively large load is applied, for example, when it is stepped on the vehicle 500, similarly to the above-described coil apparatuses 1, 1A, 1B.

  Moreover, the above-described coil devices 1, 1 </ b> A, 1 </ b> B may be used as the non-contact power receiving device 400. In other words, the non-contact power receiving device 400 includes a coil device (1, 1A, 1B). The coil 2 is configured to receive power from the non-contact power supply apparatus 300 in a non-contact manner.

  Non-contact power receiving device 400 is mounted on vehicle 500 as described above, for example. In this case, the coil device (1, 1A, 1B) is mounted on the vehicle 500 with the first plate (coil plate) 41 facing downward, for example. For example, when the vehicle 500 jumps a stone, the stone collides with the non-contact power receiving apparatus 400, and a relatively large load may be applied to the non-contact power receiving apparatus 400. Even in such a case, since the non-contact power receiving device 400 includes the coil device (1, 1A, 1B), the core 30 is hardly damaged even when a relatively large load is applied.

  Non-contact power receiving apparatus 400 is installed on installation surface 600 when used in, for example, a V2H (Vehicle to Home) system. In this case, the non-contact power receiving apparatus 400 also functions as the non-contact power supply apparatus 300. Even in such a case, since the non-contact power receiving device 400 includes the coil device (1, 1A, 1B), the core 30 is not easily damaged even when a relatively large load is applied to the vehicle 500, for example. .

1, 1A, 1B Coil device 2, 2A Coil 21 Conductor 22 Bending part 3 Core group 30, 30A, 30B, 30C Core 4 Plate 41 First plate (coil plate)
51 Core Rib 52 Coil Rib 201 Power Conversion Unit (Power Supply Device)
300 Non-contact power supply device 400 Non-contact power reception device L1 layer L11 First layer L12 Second layer S1 Storage space

Claims (12)

A coil formed by winding a conducting wire;
A plurality of cores magnetically coupled to the coil;
A plurality of plates arranged to be stacked in a predetermined direction with respect to the coil,
In the plurality of plates, one of the pair of plates adjacent in the predetermined direction includes a plurality of core ribs protruding in the predetermined direction,
The plurality of core ribs are configured to divide a space between the pair of plates into a plurality of storage spaces,
The coil device, wherein the plurality of cores are housed in the plurality of housing spaces, respectively.   2. The coil device according to claim 1, wherein a dimension of the plurality of core ribs is larger than a thickness of the plurality of cores in the predetermined direction. The plurality of plates include a coil plate on which the coil is disposed,
The coil device according to claim 1, wherein the coil plate has a plurality of coil ribs provided between the adjacent conductive wires and protruding in the predetermined direction.   The coil device according to claim 3, wherein at least a part of the plurality of core ribs and at least a part of the plurality of coil ribs overlap in the predetermined direction.   The said several core is arrange | positioned so that it may align with the axial direction of the said conducting wire in the at least one part of the site | part which overlaps with the said coil in the said predetermined direction. Coil device.   The coil device according to claim 5, wherein the plurality of cores are arranged so as not to be arranged in a direction perpendicular to the predetermined direction and the axial direction in a portion overlapping the coil in the predetermined direction. A plurality of layers in which the plurality of storage spaces are formed;
The plurality of cores are provided as a core group, and a plurality of core groups are provided.
The plurality of layers are provided side by side in the predetermined direction,
The coil device according to any one of claims 1 to 6, wherein the plurality of core groups are arranged in each of the plurality of layers.   8. The coil device according to claim 7, wherein the plurality of core ribs of each of the plurality of layers are arranged so as not to overlap each other in the predetermined direction. The outer peripheral shape of the coil is rectangular in plan view,
The plurality of cores are rectangular in plan view,
The plurality of layers include a first layer and a second layer adjacent in the predetermined direction,
The plurality of cores of the first layer and the plurality of cores of the second layer are arranged so that long sides thereof are orthogonal to each other at four corners of the coil. Coil device. The coil has a curved portion,
The plurality of layers include a first layer and a second layer adjacent in the predetermined direction,
Of the plurality of cores, the core disposed in the curved portion has a triangular shape in plan view,
The plurality of cores of the first layer and the plurality of cores of the second layer are arranged in the curved portion so as to be aligned in a circumferential direction of the curved portion. 8. The coil device according to 8. A coil device according to any one of claims 1 to 10, comprising:
The non-contact power feeding device, wherein the coil is configured to feed non-contact when an AC voltage is applied from a power source device. A coil device according to any one of claims 1 to 10, comprising:
The non-contact power receiving apparatus, wherein the coil is configured to receive power from the non-contact power feeding apparatus in a non-contact manner.

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