JP2007180189A - Magnetic core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic core capable of reducing the loss of a magnetic field and can be miniaturized. <P>SOLUTION: The magnetic core is formed in a U shape by two leg sections separated each other while directing one end side in the same direction, and a drum section for connecting the other end side of the leg sections. The connection section between the drum section and the leg section is formed in an arc shape in front view. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a magnetic core, and more particularly to a magnetic core used in a non-contact power feeding device used in a wiring system capable of simultaneously transmitting information and load power.

  Conventionally, in a system that performs load operation (monitoring) control through a terminal device, a transmission signal composed of a multipolar baseband signal is sent from the central monitoring device to the terminal device by time division multiplexing, and each terminal device transmits this transmission signal. There has been a system for exchanging information by using and obtaining a power supply for a terminal circuit unit (Patent Document 1).

In this system, a switch box standardized for an embedded wiring device and an operation terminal provided with an operation switch or the like using a mounting frame corresponding to the switch box are embedded in a wall surface. It is designed to be used in the same way as a wall switch. When installing two sets of operation terminals, use a double mounting frame with two mounting windows, attach a series of one side of the mounting frame to a series of switch boxes, and attach the other side to the wall. It has been arranged so that the two operation terminals are provided side by side by arranging the operation terminals on the respective mounting windows. In addition, a signal from one operating terminal (switch box side) to the other operating terminal can be obtained by bringing the conductive pieces provided between the mounting windows into contact with the lead pieces of the operating terminal provided on the mounting windows on both sides. It is configured to feed and wire the wires.
Japanese Patent No. 3136006

  In the above-mentioned system, power can be supplied to the terminal circuit unit of the terminal device by the transmission signal. However, for example, the power supply to the load controlled by the control terminal device is restricted due to the limitation of the current capacity of the signal line. It was the structure which supplies from commercial power supply in the place.

By the way, there is a method in which power is supplied from the power feeding side to the power receiving side by energizing the winding coil on the power feeding side to leak magnetic flux toward the power receiving side, generating an induced potential due to the magnetic flux in the winding coil on the power receiving side. It has been adopted. Such a power transmission method can be carried out even when the power-feeding side winding coil and the power-receiving side winding coil are installed at a distance from each other. Can be used as a method for supplying power in a non-contact manner between the power supply side module and the power reception side module.
At this time, the magnetic field generated by the power supply side winding coil is prevented from leaking to other than the power reception side winding coil, so that the strength of the magnetic field passing through the power reception side winding coil can be increased. Thus, contactless power feeding with higher power feeding efficiency can be performed.
Therefore, it is effective to induce a magnetic field between the power supply side module and the power reception side module by the magnetic core.

For example, as shown in FIG. 6, non-contact power feeding can be performed on the power feeding side X and the power receiving side Y using U-shaped cores (magnetic cores) 11 _X and 11 _Y and winding coils 12 _X and 12 _Y , respectively. it can. The U-shaped core is usually formed with two leg portions that are spaced apart from each other with the one end side directed in the same direction, and magnetic flux is generated from one of the two leg portions. Introduced, the direction of the introduced magnetic flux is changed, and the other end side of these leg portions is connected by a trunk portion so as to leak the magnetic flux from the other leg portion in the direction in which the magnetic flux has been introduced. Is formed. Usually, these leg parts are formed in a straight line, the body part is formed in a direction perpendicular to these leg parts, and the connecting part is formed with the leg part and the body part forming a right angle in front view. In the non-contact power feeding illustrated in FIG. 6, the power receiving side U-shaped core 11 _Y and the power feeding side U-shaped core 11 _X have the same shape.
The power receiving side U-shaped core 11 _Y and the power feeding side U-shaped core 11 _X are arranged symmetrically with a gap therebetween. That is, the power feeding side U-shaped core 11 _X and the power receiving side U-shaped core 11 _Y are annularly arranged with their legs facing each other.

Further, the power supply side U-shaped core 11 _X illustrated in FIG. 6 includes a winding coil 12 _{X in} which a winding is wound around a trunk portion 11 _X2 between the leg portion 11 _X1 and the leg portion 11 _X1. Yes. The power receiving side U-shaped core 11 _Y is also provided with a winding coil 12 _{Y in} which a winding is wound around the trunk portion 11 _Y2 .

This magnetic field is energized to feed winding coil 12 _X occurs, the magnetic field generated is induced by power feeding side U-shaped core 11 _X to feed winding coil 12 _X is provided, the feeding side U-shaped core 11 _X Leaked from the monopod. Then, the leaked magnetic field is transmitted to the one leg portion of the power receiving side U-shaped core 11 _Y arranged at a position facing the one leg portion of the power feeding side U-shaped core 11 _X , and the transmitted magnetic field is The direction of the magnetic flux is bent at a right angle at the connecting portion between the monopod and the trunk, and is guided to the other leg by the trunk. Further, the direction of the magnetic flux is bent in a right angle direction at the connection point between the other leg and the trunk, and leaked from the end of the other leg of the power receiving side U-type core 11 _Y to the power feeding side. At this time, a magnetic field passing through the inside of the power receiving side U-shaped core 11 _Y is formed, so that an induction potential is generated in the winding coil 12 _Y provided in the body portion 11 _Y2 of the power receiving side U type core 11 _Y. Further, the magnetic field leaked from the other legs of the power receiving side U-shaped core 11 _Y, the other leg of the power-receiving-side U-shaped core 11 _Y other leg power feeding side U-shaped core 11 disposed at a position facing the _X Will pass through the inside of the power supply side U-shaped core.

  In this way, an annular magnetic field having the magnetic path of the power feeding side U-shaped core and the power receiving side U-shaped core is formed, and power is fed from the power feeding side to the power receiving side. At this time, the magnetic field strength is reduced due to the location where the gap is formed or the bent portion of the magnetic core where the direction of the magnetic field is changed. When such a loss occurs, the power supply efficiency from the power supply side to the power reception side decreases. As in the case of this non-contact power supply, the magnetic core is required to reduce magnetic field loss.

  In order to reduce the loss of the magnetic field, it is possible to use a magnetic core having a large cross-sectional area. However, such a magnetic core is usually required to be used more compactly and has a large cross-sectional area. The magnetic core is difficult to adopt. That is, the conventional magnetic core has a problem that it is difficult to make it compact while reducing the loss of the magnetic field.

  The subject of this invention is providing the magnetic core which can be made compact, reducing the loss of a magnetic field.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 relating to a magnetic core is characterized in that two legs and one leg that are spaced apart from each other with one end facing in the same direction. It is formed in the shape of a letter U by the body part which connects the other end side of the part, and the connection part of the body part and the leg part is formed in a front view arc shape.

  According to a second aspect of the invention relating to the magnetic core, in the magnetic core according to the first aspect, the body portion and the leg portion are formed in an arc shape and are formed in an arc shape in a front view. Yes.

  According to a third aspect of the invention relating to a magnetic core, in the magnetic core according to the first or second aspect, the cross section is formed in a circular shape.

  Furthermore, invention of Claim 4 concerning a non-contact electric power feeder is equipped with the electric power feeding side module and the electric power receiving side module electrically contact-less-fed by this electric power feeding side module, Claim 1 thru | or 3 A magnetic core is provided in the power supply side module and the power reception side module to perform the non-contact power supply.

In a conventional magnetic core such as a U-shaped core, the magnetic flux density is reduced at the connecting portion, particularly at the corner tip portion, and the effective cross-sectional area of the magnetic core is substantially reduced. Since the connecting portion between the base and the leg is formed in an arc shape, it is possible to suppress the formation of a portion where the magnetic flux density is reduced like the corner tip portion of the conventional magnetic core, thereby reducing the magnetic field loss. Can be reduced. In addition, the low-efficiency portion such as the corner tip portion can be eliminated from the magnetic core, and the magnetic core can be made compact. That is, it can be made compact while reducing the loss of the magnetic field.
Furthermore, according to the present invention, since the connecting portion between the body portion and the leg portion is formed in an arc shape, the winding coil formed by winding is passed through the connecting portion from the leg portion of the magnetic core. The effect which becomes easy to prepare for is also show | played. Therefore, in order to mount the winding coil on the body, it is possible to omit the trouble of once cutting the leg portion and then bonding it again after mounting the winding coil. It can also be suppressed.

  Moreover, when such a magnetic core is used for a non-contact power feeding device, the non-contact power feeding device can be made compact, and the formation of an adhesive portion at the leg portion of the magnetic core is also suppressed. Therefore, it can be suppressed that a new gap portion is formed in the magnetic core and power supply efficiency is lowered.

The preferred embodiments of the present invention will be described below. FIG. 1 is a configuration diagram of a wiring system using a non-contact power feeding device.
In the system using the non-contact power feeding device, one or a plurality of switch boxes embedded and disposed at appropriate positions in a building are used as a basic base. Between these switch boxes, the power line L1 and the information line L2 previously wired in the wall surface are sent and wired. In addition, the power line L1 drawn indoors through the main breaker MB and the branch breaker BB in the distribution box 1 is introduced to the starting switch box, and the gateway GW (if necessary) is connected to the external Internet network NT. Information line L2 connected via a router and a hub).

  These switch boxes consist of switch boxes that are standardized to correspond to a series of mounting frames to which, for example, three large square embedded module wiring equipment standardized by JIS can be mounted. In addition, the power line L1 and the information line L2 sent from the distribution box 1 or another switch box are introduced from the upper part, and the power line L1 and the information line L2 for feeding and wiring to the other switch box are derived from the lower part. ing. Each switch box is provided with a gate device 3 for connecting a basic function module 8 constituting a non-contact power feeding device.

  The gate device 3 is provided with connection terminal portions 5a and 5b having a quick connection terminal structure and connection terminal portions 5a 'and 5b' for feed wiring on the back surface of the body, and the corresponding power line L1 and information line L2 are connected to each other. It has become. In addition, on the front surface of the body, a power path connection port 6A having a contact portion electrically connected to the sent power line L1, and information electrically connected to the sent information line L2. And a connection port 6 that is modularized.

  The basic function module 8 performs non-contact power supply with the extended function module 9 described later. The basic function module 8 includes a circuit shown in FIG. 2 in a flat module body made of synthetic resin, and the connected portions 7A and 7B of the connector 7 on the back surface are connected to the connection ports 6A and 6B of the gate device 3, respectively. By joining, the front opening of the switch box is covered, and the peripheral flange is overlaid on the wall surface around the front opening of the switch box.

  As shown in FIG. 2, the basic function module 8 converts an AC / DC converter 13a that rectifies and smoothes the commercial power supply AC connected via the connected portion 7A, and converts the smoothed AC power supply to a high frequency. Between DC / AC converter 13b applied to winding coil 12 (hereinafter also referred to as “coil”) wound around magnetic core 11 (hereinafter also referred to as “core”), and between AC / DC converter 13a and DC / AC converter 13b Information signal transmitted in both directions through a DC power supply 14 connected to the line connecting the two, and obtaining an operating power supply + V of an internal circuit consisting of a stable DC voltage, and an information line L2 connected via the connected part 7B Transmitting / receiving unit 15, E / O conversion unit 16 for E / O converting an information signal received via the information line L 2 and sending it through the light emitting element LED, and an expansion unit to be described later An information signal consisting sent come optical signal from the module 9 side and received by the light receiving element PD and O / E conversion and an O / E converter 17 to be passed to the transceiver 15.

  The coil 12 and the core 11 constitute an electromagnetic coupling unit (power supply unit) that is a primary side of a transformer that constitutes a power supply unit for supplying power to the extended function module 9 connected to the basic function module 8 in a contactless manner. The core 11 is magnetically coupled to the core 19 around which the coil 18 provided on the extended function module 9 (see FIG. 3) to be connected is wound, and a power supply voltage is induced on the coil 18 side by a transformer action to supply power. To do. Here, the DC / AC converter 13b converts to AC power having a frequency higher than the commercial frequency, thereby reducing the size of the transformer configuration by the electromagnetic coupling unit.

  On the other hand, the light emitting element LED of the E / O conversion unit 16 is used to transmit an information signal to the adjacent extension function module 9 in a non-contact manner by an optical signal. The O / E conversion unit on the side of the connected extension function module 9 The light receiving element PD provided at 20 is opposed to the light receiving element PD. The light receiving element LED of the O / E conversion unit 17 is for receiving an information signal transmitted as an optical signal from the adjacent extended function module 9, and is connected to the E / O conversion unit 21 on the extended function module 9 side. The light emitting element LED is opposed.

  In addition, although only one set of the electromagnetic coupling portion including the core 11 and the coil 12 is shown in FIG. 3, two sets may be provided electrically in parallel as necessary. Further, the light emitting element LED of the E / O conversion unit 16 and the light receiving element PD of the O / E conversion unit 17 are also connected to different light emitting elements LED and PD, respectively, and are close to the side wall on both sides of the module body. One set is arranged at each internal position.

  In FIG. 2, both the connection ports 6A and 6B of the gate device 3 and the connected portions 7A and 7B of the connector 7 of the basic function module 8 are shown in the vertical direction, but are actually in the horizontal direction.

  In the system using this non-contact power supply device, a plurality of types of extended function modules 9 are prepared depending on the function that operates upon receiving power supply, but the height dimension is standardized to the same height dimension as the basic function module 8. In addition, the width dimension is also normalized to an integral multiple of the standardized unit module dimension, and the back surface is formed into a flat surface so that it can follow the wall surface.

  As shown in FIG. 3, the extended function module 9 includes two sets of electromagnetic coupling portions including the coil 18 and the core 19 described above, and is disposed in the vicinity of both side walls of the module body. A rectifier circuit 28 is electrically connected to one electromagnetic coupling unit (secondary side) serving as a power receiving unit, and smoothes the power received from the primary side of the basic function module 8 or the other extended function module 9. . In addition, a DC / AC converter 29 electrically connected to the rectifier circuit 28 is electrically connected to the other electromagnetic coupling unit (primary side) serving as a power supply unit, and the frequency of the smoothed power is high. Convert to AC power. The side surface position of the module body where the tips of the cores 19 constituting these electromagnetic coupling portions are arranged close to each other is the magnetic coupling portion. A DC power supply unit 22 is connected to a line connecting the rectifier circuit 28 and the DC / AC converter 29 so as to obtain an operating power supply + V of the internal circuit.

  Further, in order to send and receive information signals, an information signal consisting of an optical signal transmitted from the basic function module 8 or the extended function module 9 to be connected in the extended function module 9 is received by the light receiving element PD and electrically An O / E conversion unit 20 that converts the signal into an electric signal; an E / O conversion unit 21 that sends out an information signal including an electric signal to the adjacent basic function module 8 or 9 as an information signal including an optical signal by the light emitting element LED; Two sets of information signal transmission / reception means including an information signal transmission / reception unit 23 for receiving an information signal including an electric signal from the O / E conversion unit 20 and sending an information signal including the electric signal to the E / O conversion unit 21 are provided. One light-emitting element LED and light-receiving element PD are placed in the vicinity of the left side wall of the module body, and the other light-emitting element LED and light-receiving element PD in the transmission processing unit are modeled. Yuru is disposed interiorly of the right side wall near the body. Here, the position of the light emitting element LED arranged on the left side is below the light receiving element PD, and the position of the light emitting element LED arranged on the right side is above the light receiving element PD. Further, the light emitting element LED and the light receiving element PD arranged on the right side of the basic function module 8 or the extended function module 9 connected to the left side are opposed to the light receiving element PD and the light emitting element LED arranged on the left side, respectively. ing. Further, the light emitting element LED and the light receiving element PD arranged on the left side of the basic function module 8 or the extended function module 9 connected to the right side, and the light receiving element PD and the light emitting element LED arranged on the right side face each other. ing. In the module body, the information signal transmission / reception units 23 on both sides are connected by the bidirectional signal line 24 so that the information signal can be relayed to the basic function module 8 or the extension function module 9 adjacent to both sides. ing.

  Further, in the extended function module 9, the information signal on the signal line 24 is received, the information signal is transmitted on the signal line 26, and the data is received from the information signal received by the transmission / reception unit 25. An arithmetic processing unit 26 that performs data generation processing when data is transmitted from the extended function module 9 to another extended function module 9 and the arithmetic processing unit 26 via the I / O interface 27. And a functional unit 30 that operates by exchanging data between them. The operation power supply + V is supplied to each of these units from the DC power supply unit 22. The configuration of the function unit 30 differs depending on the extended function module 9.

  As the extended function module 9, an extended function module constituting an air conditioner operation controller, an extended function module constituting an air conditioner temperature setting device, and an extended function constituting a wall switch for lighting fixture on / off operation Module, extended function module that constitutes a gas, fire or crime prevention alarm device, furthermore, an extended function module that constitutes a charger for electric razors, electric toothbrushes, portable audio players, etc. that use power supply, intercom call function and Various applications such as an extended function module constituting a slave unit corresponding to a master unit of an interphone provided with a display function (monitor) for displaying an image photographed by a television camera installed to photograph a visitor can be applied. .

  As the information signal transmission method of this wiring system, either baseband transmission or broadband transmission may be adopted, and the protocol is not limited. 1 to 1 or 1 to N so that audio and video can be sent to each other based on the JT-H232 packet and one or more functions can be operated by operation data from the operation side in the control system. It is preferable to appropriately adopt a route control protocol corresponding to unicast or broadcast capable of handling the above. Further, the protocol used between the gate devices 3 and the protocol used in the function modules 8 and 9 connected to the gate device 3 may be made different. For example, protocol conversion may be performed on the gate device 3.

  In using the basic function module 8, first, the gate device 3 is attached to a switch box embedded in a wall of a building in advance through an attachment frame, and the power line L1 and the information line L2 that are wired in advance are connected. I do. Thereafter, the corresponding connected portions 7A and 7B of the connector 7 of the basic function module 8 are connected to the electric wire connection ports 6A and 6B provided on the front surface portion of the gate device 3, and the basic function module 8 is connected to the gate device. 3 is attached to the mounting frame so as to cover the front surface portion. When the basic function module 8 is attached, the front surface portion protrudes from the wall surface, and both side surfaces are exposed to the indoor side.

  The extended function module 9 has one side surface (connecting surface) in contact with one of the exposed side surfaces (connecting surface) of the basic function module 8, and in this state, the extended function module 9 and the basic function module 8 are connected by a coupling body or the like. Are mechanically connected to each other. At this time, for example, as a fitting means for positioning, a convex portion and a concave portion are provided at corresponding positions on the connection surface of each module, so that the connection between the modules is ensured.

Further, when another extended function module 9 is connected to the previously connected extended function module 9, they are mechanically connected to each other by a connecting body or the like with the opposite side surfaces being in contact with each other. In this way, as shown in FIG. 1, the extended function modules 9 (9 ₁ ... 9 ₃ ) can be sequentially connected to the sides. Note that the extended function module 9 may be connected to both sides of the basic function module 8. After connecting the extended function module 9 in this way, the extended function module 9 or the basic function module 8 located at both ends is attached to the side portions of the anti-connection portion of the extended function module 9 by detachably attaching the end cover. 9 connection construction will be completed. When the extended function module 9 is not connected to the basic function module 8, that is, when it is left unused, end covers are attached to both sides of the basic function module 8.

This basic function module 8 and the extended function module 9 will be further described with reference to FIG. 4 which is a partial cross-sectional view showing the arrangement of the magnetic cores at the location where the side surfaces abut each other and are adjacent to each other. The basic function module 8 has a casing formed in a rectangular shape in front view, and a magnetic core 11 is accommodated on the right side of the casing.
The magnetic core 11 is formed into a U-shape by two leg portions 11 ₁ arranged with one end portions facing in the same direction and spaced apart from each other, and a trunk portion 11 ₂ connecting the other end portions of the leg portions. Is formed. The connection point between the body portion 11 ₂ and the leg portion 11 ₁ is formed in the front arc-shaped, and is further formed on the body portion 11 ₂ and the legs 11 ₁ itself front view arcuate. In addition, the trunk portion, the leg portion, and the arc of the connecting portion between the trunk portion and the leg portion have the same center, and the entire front view is semicircular to form a U-shape. And it is accommodated in the housing | casing of the basic function module 8 with the leg part 11 ₁ facing right side in the state which left | separated the leg part 11 ₁ to the up-down direction. In the magnetic core 11, the upper and lower leg portions 11 ₁ and the body portion 11 ₂ for connecting the leg portions 11 ₁ have the same rectangular cross section. That is, the leg portion 11 ₁ and the trunk portion 11 ₂ are formed to have the same thickness and the same width, and the width and thickness are the same even at the arc-shaped connecting portion.

The expansion module 9 has a rectangular housing in front view formed in the same vertical length as the basic module 8, and is used for the basic module 8 on the left and right sides of the housing, respectively. and has the magnetic core 19 having the same shape are housed, these magnetic cores 19 are located at the same height in the vertical direction, the magnetic core 19 housed in the housing left side, spaced legs 19 ₁ in the vertical direction are arranged toward the legs 19 ₁ on the left side in a state of being, the magnetic core being accommodated in the housing right, right leg 19 ₁ while being spaced apart legs 19 ₁ in the vertical direction It is arranged towards the direction. In addition, the magnetic core 19 of the extension module 9 is accommodated in the basic function module 8 when the right side surface of the basic function module 8 and the left side surface of the extension module 9 are brought into contact with each other. The two legs 11 ₁ are arranged so as to face the two legs 19 ₁ of the magnetic core 19 arranged on the left side of the expansion module 9.
The magnetic core 19 is accommodated in the extension 9 also has a magnetic core 19 housed in the basic function module 8 of the same shape, the body portion 19 ₂ the winding coil 18 is wound around The same applies to the points.

  Thus, by accommodating the magnetic core in the basic function module 8 and the expansion module 9, the right side surface of the basic function module 8 and the left side surface of the expansion module 9 are brought into contact with each other, so that the basic function module 8 and the expansion module 9 Are adjacent to each other, the magnetic core 11 of the basic function module 8 and the magnetic core 19 of the expansion module 9 face each other and are arranged in a substantially circular shape.

  When the winding coil 12 of the basic function module 8 is energized with the magnetic core arranged in an annular shape, a magnetic field generated by the winding coil 12 is induced in the magnetic core to form an annular magnetic field. At this time, in the extension module 9 on the power receiving side, since the magnetic core 19 disposed on the left side is inserted into the winding coil 18, the annular magnetic field passes through the winding coil 18. An induction potential is generated in the winding coil 18 of the expansion module 9 by the magnetic field, and non-contact power feeding is performed.

  Similarly to the extension module 9, a plurality of extension modules 9 containing magnetic cores can be used, and a plurality of extension modules can be adjacent to the right side of the basic function module 8 for non-contact power feeding. For example, when one extension module is adjacent to the right side of the basic function module 8 and another extension module is adjacent to the right side of the one extension module, the basic function module 8 is connected to another extension module via the one extension module. A non-contact power supply can be implemented.

As described above, the magnetic core 11 of the basic function module 8 and the magnetic core 19 of the expansion module 9 become substantially perfect circles by using the magnetic core in which the connecting portion between the trunk portion and the leg portion is formed in an arc shape. Arranged in an annular shape, it is possible to suppress the formation of a region having a low magnetic flux density, and the magnetic core can be made compact while reducing the loss of the magnetic field. That is, in this magnetic core, the connecting portion is formed in an arc shape when viewed from the front, so that the direction of the magnetic field passing through the magnetic core is gentler than the conventional U-shaped magnetic core in which the connecting portion is formed at a right angle. Thus, the loss of the magnetic field is reduced. In addition, since there is no change in the cross-sectional area from the leg portion to the trunk portion, the loss of the magnetic field is further reduced.
Therefore, the non-contact power feeding device can also be made compact while improving the power feeding efficiency.
Furthermore, since the cross-sectional area does not change in the section from the leg section to the trunk section through the connecting portion between the leg section and the trunk section, the movement of the winding coil is not hindered in this section. It becomes easy to attach the winding coil to the body through the connecting portion. On the other hand, since the detachment is easy, the winding coil can be easily replaced. That is, the winding coil can be detached from the magnetic core without cutting and bonding the legs of the magnetic core.

  In the present embodiment, the effects of the present invention are more conspicuous, such as the ability to make the device compact and the ability to suppress the formation of adhesive portions on the legs of the magnetic core to suppress the reduction in power supply efficiency. However, in the present invention, the use of the magnetic core is not limited to such a case.

  Further, in the present embodiment, it is formed in a U-shape by two leg portions that are arranged so that one end portions thereof are spaced apart from each other in the same direction and a trunk portion that connects the other end portions of the leg portions. In the present invention, the magnetic core in which the connecting portion between the body portion and the leg portion is formed in an arc shape has been described as an example of a semicircular shape when viewed from the front as shown in FIG. 5a). The core is not limited to a semicircular shape when viewed from the front, and the whole core can be formed in an arc shape having a narrower arc range than the semicircle as shown in FIG. Moreover, it is not limited to what has a circular arc shape in the whole magnetic core, It may be a shape where the trunk | drum as shown in FIG. May be formed in a linear shape. Furthermore, in the present embodiment, the case where the cross-sectional shape is rectangular has been described as an example. However, in the present invention, a circular cross-section as shown in FIG.

  By forming the magnetic core in a circular cross section as shown in FIG. 5d), the magnetic flux density in the magnetic core can be further increased as compared with the case where the magnetic core is formed in a rectangular cross section. That is, in the case of a magnetic core having a rectangular cross section, the magnetic density at the corner of the cross section is lower than that at the center, but when the cross section is formed without the corner, the magnetic flux density in the cross section is reduced. The magnetic flux density in the magnetic core can be further increased.

The schematic block diagram showing the non-contact electric power feeder in this embodiment. The circuit block diagram of the basic function module in this embodiment. The circuit block diagram of the extended function module in this embodiment. The fragmentary sectional schematic which expanded the principal part showing a non-contact electric power feeder. a) The perspective view which shows the magnetic core of one Embodiment. b) The perspective view which shows the magnetic core of other embodiment. c) The perspective view which shows the magnetic core of other embodiment. d) The perspective view which shows the magnetic core of other embodiment. The perspective view showing the method of non-contact electric power feeding.

Explanation of symbols

  8: Basic function module, 9: Expansion module, 11, 19: Magnetic core, 12, 18: Winding coil, X: Power supply side module, Y: Power reception side module

Claims (4)

  It is formed in a U-shape with two leg portions that are spaced apart from each other with the one end side directed in the same direction, and a trunk portion that connects the other end side of the leg portion. The magnetic core is characterized in that a connecting portion with the portion is formed in an arc shape when viewed from the front.   The magnetic core according to claim 1, wherein the body portion and the leg portion are formed in an arc shape and are formed in an arc shape in a front view.   The magnetic core according to claim 1, wherein the cross section is formed in a circular shape.   A power supply side module and a power reception side module that is contactlessly supplied with power by the power supply side module are provided, and the magnetic core according to any one of claims 1 to 3 is provided in the power supply side module and the power reception side module. The non-contact power feeding apparatus, wherein the non-contact power feeding is performed.

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