JP2013196995A - Alternating-current transmission medium, coil, and power feeding connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress generation of Joule heat caused by an eddy current without causing complication in conductor terminal end processing to prevent increase in temperature of a current transmission medium and a connector and the like, in a transmission medium of an alternating-current, such as an electromagnetic induction coil transmitting power by electromagnetic induction.SOLUTION: An insulation electric wire 1 used as an alternating-current transmission medium comprises: a flat conductor 101 formed to have a thickness smaller than a width; and an insulation coating 102 covering the circumference of the flat conductor 101. A plurality of notches 103 are formed to the flat conductor 101 so as to be provided in a direction crossing a width direction respectively. The insulation electric wire 1 is applied to a coil for non-contact power feeding, for example.

Description

  The present invention relates to a power supply connector including an electromagnetic induction coil, a coil, and an alternating current transmission medium.

  In a charging system for charging a battery mounted on an electric vehicle such as an electric vehicle and a hybrid vehicle with an external power source, a power feeding cable connected to the external power source and a power receiving line of the vehicle connected to a battery charging circuit are: Connected by a power supply connector set. Further, from the viewpoint of safety and convenience, it is desirable that a non-contact power feeding system using magnetic coupling by electromagnetic induction or magnetic field resonance is employed in a vehicle power feeding system.

  In the non-contact power supply system using electromagnetic induction, the power supply connector set is configured by a primary side power supply connector provided at an end portion of the power supply cable and a secondary side power supply connector constituting a power supply port of the vehicle. The primary power supply connector is a part that is held and handled by a person's hand, and the secondary power supply connector is a part that is incorporated in the vehicle.

  In the power supply connector set, the primary side power supply connector includes a primary coil connected to the power supply cable and a non-conductive primary side support that supports the primary coil. Moreover, a secondary side electric power feeding connector contains the secondary coil connected with a charging circuit, and the nonelectroconductive secondary side support body which supports it.

  Further, as disclosed in Patent Document 1, the primary coil and the secondary coil are arranged so as to overlap over the entire circumference, thereby suppressing leakage inductance and transmitting power more efficiently.

  Moreover, as shown in FIG. 2 and FIG. 4 of Patent Document 1, the two overlapped coils are covered with a magnetic core made of a magnetic material over the entire hollow portion and outer periphery. . The magnetic core is a member for concentrating the magnetic flux generated around the two superimposed coils with high density. In Patent Document 1, the magnetic core is a primary iron core and a secondary iron core.

  Conventionally, in the power supply connector set, as shown in Patent Document 1, the magnetic core includes a first magnetic core built in the primary side power supply connector and a second magnetic core built in the secondary side power supply connector. The body core is composed of two members. By connecting the primary side power supply connector and the secondary side power supply connector, the first magnetic body core and the second magnetic body core have the two overlapped coils placed around the hollow portion and the entire outer periphery. Combined to cover the whole area.

Japanese Patent Laid-Open No. 3-133110

  Recently, in order to charge a battery of a vehicle in a short time, the current of power supply tends to increase. However, in a non-contact power feeding system using electromagnetic induction using a high frequency current, the problem that the transmission medium of the high frequency current generates heat due to the eddy current and the temperature increases as the current for feeding increases. In particular, in the electromagnetic induction coil of the non-contact power supply system, the Joule heat of the eddy current generated in the electric wire wound at a high density is intensively generated in a narrow region, so that the problem of high temperature becomes more remarkable.

  In order to suppress heat generation due to eddy currents, it is known that a litz wire, which is a bundle of many thin conductors, is used as an alternating current transmission medium. However, the use of litz wire is not preferable because the end treatment of a large number of thin conductors becomes complicated and the cost increases.

  The present invention, in an AC current transmission medium such as an electromagnetic induction coil that transmits power by electromagnetic induction, suppresses the generation of Joule heat due to eddy currents at low cost without incurring the complexity of terminal treatment of the conductor, The purpose is to prevent high temperatures of current transmission media and connectors.

  The alternating current transmission medium according to the present invention has a flat conductor having a thickness smaller than the width and having a plurality of cuts along the direction intersecting the width direction.

  In the alternating current transmission medium according to the present invention, it is conceivable that the plurality of cuts are formed at a depth extending from both end faces in the thickness direction of the flat conductor to less than half of the thickness.

  Further, the present invention may be regarded as an invention of a coil made of a winding of an alternating current transmission medium according to the present invention. The coil which concerns on this invention consists of a winding of the insulated wire which has a flat conductor in which the thickness was formed smaller than the width | variety and each formed several cut | interruptions along the direction which cross | intersects the width direction.

Further, the present invention may be understood as an invention of a power supply connector including an electromagnetic induction coil made of a winding of an alternating current transmission medium according to the present invention. The electric power feeding connector which concerns on this invention is provided with each component shown below.
(1) A 1st component is an electromagnetic induction coil which consists of a coil | winding of an insulated wire and transmits electric power by electromagnetic induction between the said other party coils in the state which overlaps with the other party coil. The conductor of the insulated wire is a flat conductor having a thickness smaller than the width and having a plurality of cuts along the direction intersecting the width direction.
(2) The second component is made of a magnetic material, supported by the support body together with the electromagnetic induction coil, and the electromagnetic induction coil together with the other member of the magnetic body covering the hollow portion and the entire outer periphery. This is a magnetic core that is a member formed in a covering shape.

  According to the present invention, the conductor break in the alternating current transmission medium interrupts the eddy current path in the surface layer of the conductor, so that the eddy current hardly occurs in the surface layer of the conductor. As a result, in the alternating current transmission medium, the generation of Joule heat due to the eddy current is suppressed, and the high temperature of the current transmission medium and the connector can be prevented. In addition, according to the present invention, since the number of conductors does not increase, unlike a case where a litz wire is employed, an alternating current transmission medium can be provided at low cost without causing complication of the end treatment of the conductor. .

  Further, it is known that high-frequency alternating current flows biased to the surface layer portion of the electric wire due to the skin effect. Therefore, if a flat conductor having a thickness smaller than the width is adopted as the conductor of the alternating current transmission medium, the conductor can be reduced in weight by eliminating useless portions of the conductor.

  In addition, as described above, when an eddy current is generated in a coil in which an alternating current flows, for example, an electromagnetic induction coil provided in a power supply connector, Joule heat of the eddy current is intensively generated in a narrow region, resulting in a problem of high temperature. Becomes more prominent. Therefore, if an insulated wire having a conductor in which a plurality of cuts are formed is applied to a coil such as an electromagnetic induction coil provided in the power supply connector, the effect of preventing high temperature due to suppression of eddy current becomes more remarkable.

  In addition, since eddy currents are mainly generated in the surface layer of the conductor, a plurality of cuts are formed at a depth extending from both end faces in the thickness direction of the flat conductor to less than half of the thickness even though it does not penetrate in the thickness direction. It is enough if it is done. Forming such a shallow cut in the flat conductor is easier than forming a cut through the flat conductor.

1 is a perspective view of an insulated wire 1 according to a first embodiment of the present invention. 2 is a plan view of a flat conductor 101 of the insulated wire 1. FIG. It is a side view of the electric power feeding connector set 2 which concerns on the Example of this invention. It is a perspective view of the coil and magnetic body core with which the electric power feeding connector set 2 is provided. It is a perspective view of insulated wire 1A concerning a 2nd embodiment of the present invention. It is a top view of the conductor of insulated wire 1B concerning a 3rd embodiment of the present invention. It is a top view of the conductor of insulated wire 1C concerning a 4th embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

<First Embodiment>
First, the insulated wire 1 which concerns on 1st Embodiment of this invention is demonstrated, referring FIG.1 and FIG.2. The insulated wire 1 is an example of an alternating current transmission medium and is a wire for transmitting a high-frequency alternating current.

  The insulated wire 1 includes a flat conductor 101 and an insulating coating 102. 1 and 2, the X-axis direction is the width direction of the flat conductor 101, the Y-axis direction is the longitudinal direction of the flat conductor 101, and the Z-axis direction is the thickness direction of the flat conductor 101.

  The flat conductor 101 is a conductor formed with a thickness (dimension in the Z-axis direction) smaller than a width (dimension in the X-axis direction). Further, the flat conductor 101 is formed with a plurality of cuts 103 that are aligned in the longitudinal direction (Y-axis direction) along the direction intersecting the width direction (X-axis direction).

  In the present embodiment, the plurality of cuts 103 are formed along the longitudinal direction (Y-axis direction) of the flat conductor 101. In addition, a plurality of sets of parallel cut groups 104 each including a plurality of cuts 103 arranged at intervals in the width direction (X-axis direction) of the flat conductor 101 are formed side by side in the longitudinal direction of the flat conductor 101. ing. Further, in the present embodiment, the plurality of cuts 103 are formed through the flat conductor 101 in the thickness direction (Z-axis direction).

  The insulating coating 102 is a member made of a nonconductive material that covers the periphery of the flat conductor 101. The insulating coating 102 is a member formed by extruding or painting an insulating resin such as polyethylene, vinyl chloride, or polyamide-based nylon.

  In FIG. 2, an eddy current path 7 generated when an alternating current flows through the flat conductor 101 of the insulated wire 1 is schematically shown by a virtual line (two-dot chain line).

<Effect>
As shown in FIG. 2, in the flat conductor 101 of the insulated wire 1, since the plurality of cuts 103 block the eddy current path 7 in the surface layer of the flat conductor 101, eddy current is generated in the surface layer of the flat conductor 101. Hateful.

  When the insulated wire 1 is used as an alternating current transmission medium, the generation of Joule heat due to eddy current is suppressed, and it is possible to prevent the insulated wire 1 itself and electrical components such as connectors attached to the insulated wire 1 from being heated to high temperatures. Further, when the insulated wire 1 is employed, the number of conductors does not increase, and unlike the case where a litz wire is employed, the terminal treatment of the conductor is not complicated, and the cost can be reduced.

  Further, it is known that high-frequency alternating current flows biased to the surface layer portion of the conductor due to the skin effect. Therefore, if the insulated wire 1 having the flat conductor 101 is employed as an alternating current transmission medium, the conductor can be reduced in weight by eliminating a useless portion of the conductor.

<Example>
Next, the power supply connector set 2 according to the embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 is a side view of the power supply connector set 2, and FIG. 4 is a perspective view of two coils and a magnetic core included in the power supply connector set 2.

  The power supply connector set 2 is a set of connectors connected to each other in order to charge a battery of an electric vehicle such as an electric vehicle or a hybrid vehicle with an external power source. As shown in FIG. 3, the power supply connector set 2 includes a primary side power supply connector 3 operated by a person and a secondary side connector 4 incorporated in the vehicle.

<Primary power supply connector>
The primary-side power supply connector 3 is a connector on the side that a person holds and handles among two power supply connectors connected to each other. In a vehicle battery charging system, the primary power supply connector 3 is usually referred to as a power supply plug.

  The primary side power supply connector 3 includes a small diameter coil 8, a primary side magnetic core 10, and a primary side housing 30. The small-diameter coil 8 is connected to an AC power source (not shown) via the power supply cable 31.

  The primary housing 30 is a non-conductive support that supports the primary magnetic core 10. The primary side housing 30 is configured by a member formed of a non-conductive synthetic resin or a metal member whose surface is coated with a non-conductive synthetic resin.

  The small-diameter coil 8 is entirely covered with a covering member 32 made of non-conductive synthetic resin. The covering member 32 electrically insulates the small-diameter coil 8 from its periphery and fixes the small-diameter coil 8 to the primary side magnetic core 10. Further, the covering member 32 also functions to reinforce the small diameter coil 8. The covering member 32 is formed by insert molding using, for example, the small-diameter coil 8 and the primary side magnetic core 10 that supports the small-diameter coil 8 as insert parts.

  In addition, the primary side housing 30 is formed with a handle portion 301 held by a person. In addition, the primary housing 30 is also provided with a lock portion for holding the connection state when the primary power supply connector 3 is connected to the secondary power supply connector 4.

<Secondary power supply connector>
The secondary power supply connector 4 is a connector on the side incorporated in the vehicle among the two power supply connectors connected to each other. In a vehicle battery charging system, the secondary power supply connector 4 is usually referred to as an inlet or the like.

  The secondary power feeding connector 4 includes a large-diameter coil 9, a secondary magnetic core 20, and a secondary housing 40. The large-diameter coil 9 is connected to a battery charging circuit (not shown) via an electric wire or bus bar (not shown).

  The secondary casing 40 is a non-conductive support that supports the secondary magnetic core 20 that houses the large-diameter coil 9 inside. The secondary side housing 40 is configured by a member formed of a non-conductive synthetic resin or a metal member whose surface is coated with a non-conductive synthetic resin. The secondary housing 40 is formed with an opening 41 that forms the entrance of the small diameter coil 8 of the primary power supply connector 3.

<Coil>
The small-diameter coil 8 and the large-diameter coil 9 are a pair of electromagnetic induction coils that are superposed on the inner side and the outer side and transmit power by electromagnetic induction. The small-diameter coil 8 and the large-diameter coil 9 are coils made of the wound wire of the insulated wire 1 shown in FIG. That is, the small-diameter coil 8 and the large-diameter coil 9 are insulated wires having a flat conductor 101 having a thickness smaller than the width and each of which has a plurality of cuts 103 formed along the direction intersecting the width direction and arranged at intervals. It consists of one winding.

  The flat conductor 101 of the insulated wire 1 forming the small diameter coil 8 and the large diameter coil 9 used for charging the battery of the electric vehicle is formed with a width of several millimeters and a thickness of about 30 to 50% of the width, for example. Yes.

  The large-diameter coil 9 encloses a hollow portion into which the counterpart small-diameter coil 8 is inserted, and transmits electric power to and from the small-diameter coil 8 by electromagnetic induction. The primary-side small-diameter coil 8 and the secondary-side large-diameter coil 9 are arranged so as to overlap over the entire circumference when power is supplied. Thereby, a leakage inductance is suppressed and electric power is transmitted more efficiently.

  Although the small diameter coil 8 and the large diameter coil 9 shown in FIG. 4 are cylindrical, the small diameter coil 8 and the large diameter coil 9 are formed in other shapes such as an elliptical cylindrical shape or a cylindrical shape having a polygonal cross section. It is also conceivable.

<Magnetic core>
The primary side magnetic body core 10 and the secondary side magnetic body core 20 are combined with each other to form a shape that surrounds the overlapping small diameter coil 8 and large diameter coil 9 from the inside to the outside thereof.

  The primary side magnetic body core 10 and the secondary side magnetic body core 20 are members (magnetic bodies) made of a magnetic material such as permalloy, ferrite, or silicon steel, for example. The primary side magnetic body core 10 and the secondary side magnetic body core 20 are members formed by, for example, cutting a lump of magnetic body with a cutting tool or sintering powder made of a magnetic material. is there. When formed by sintering, the primary side magnetic core 10 and the secondary side magnetic core 20 are formed by compressing a solid powder assembly made of a magnetic material in a mold, and further from the melting point of the magnetic material. Also, it is solidified and molded by being heated at a low temperature.

<Primary magnetic core>
The primary magnetic core 10 is a member made of a magnetic material that supports the small-diameter coil 8 and closes the opening 211 of the secondary magnetic core 20. The primary-side magnetic core 10 includes a column portion 11 that supports the small-diameter coil 8 from the inside, and a lid portion 12 that covers an opening and an end surface of one end of the small-diameter coil 8. The lid portion 12 is formed in a hook shape projecting outward from the column portion 11 at the base portion of the column portion 11.

<Secondary side magnetic core>
The secondary side magnetic core 20 is a container-like member made of a magnetic material and accommodated in the large-diameter coil 9. That is, the secondary-side magnetic core 20 is formed in a container shape surrounding three sides of the hollow portion where the large-diameter coil 9 is disposed, and an opening 211 that forms the entrance of the small-diameter coil 8 is formed.

  When the primary side power supply connector 3 and the secondary side power supply connector 4 are connected, the primary side magnetic core 10 and the secondary side magnetic core 20 are combined. In the combined state, the primary side magnetic core 10 and the secondary side magnetic core 20 form an annular cavity that can accommodate the small diameter coil 8 and the large diameter coil 9 concentrically on the inside and outside. . Furthermore, the primary side magnetic body core 10 and the secondary side magnetic body core 20 are formed in a shape that covers the small-diameter coil 8 and the large-diameter coil 9 over the entire periphery of the hollow portion and the outside in the combined state. The

<Effect>
When the power supply connector set 2 is employed, the cut 103 of the flat conductor 101 blocks the path of the eddy current 7 in the insulated wire 1 constituting the small diameter coil 8 and the large diameter coil 9, and the eddy current 7 is less likely to be generated. As a result, in the small diameter coil 8 and the large diameter coil 9, the generation of Joule heat due to the eddy current 7 is suppressed, and the small diameter coil 8, the large diameter coil 9, the primary side power supply connector 3, the secondary side power supply connector 4, etc. Can be prevented.

  Further, since the number of conductors constituting the small-diameter coil 8 and the large-diameter coil 9 does not increase, unlike the case where a litz wire is employed, the small-diameter coil 8 is produced at low cost without causing complication of the terminal treatment of the conductor. And the large diameter coil 9 can be provided.

  Further, as described above, when eddy currents are generated in the small-diameter coil 8 and the large-diameter coil 9 through which high-frequency alternating current flows, Joule heat of the eddy currents is intensively generated in a narrow region, resulting in a problem of high temperature. Becomes more prominent. Therefore, if the insulated wire 1 having the flat conductor 101 in which a plurality of cuts 103 are formed is applied to the small diameter coil 8 of the primary side power supply connector 3 and the large diameter coil 9 of the secondary side power supply connector 4, The effect of preventing high temperature due to the suppression becomes more remarkable.

  In addition, since the insulated wire 1 having the flat conductor 101 is employed in the small diameter coil 8 and the large diameter coil 9, the waste of the conductor due to the skin effect can be eliminated and the small diameter coil 8 and the large diameter coil 9 can be reduced in weight.

Second Embodiment
Next, an insulated wire 1A according to a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a perspective view of the insulated wire 1A. 5, the same components as those shown in FIG. 1 are denoted by the same reference numerals.

  The insulated wire 1 </ b> A includes a flat conductor 101 and an insulating coating 102. A plurality of cuts 103A are formed in the flat conductor 101 of the insulated wire 1A. The insulated wire 1A differs from the insulated wire 1 shown in FIG. 1 only in the depth of the cut 103A formed in the flat conductor 101. Hereinafter, only different points of the insulated wire 1A from the insulated wire 1 will be described.

  By applying the insulated wire 1A shown in FIG. 5 to an AC current transmission medium such as an electromagnetic induction coil, the same effect as that obtained when the insulated wire 1 is applied can be obtained.

  As shown in FIG. 5, in the insulated wire 1 </ b> A, the plurality of cuts 103 </ b> A are formed at a depth from both end surfaces in the thickness direction (Z-axis direction) of the flat conductor 101 to less than half of the thickness. That is, the thickness t of the flat conductor 101 and the depth d of each cut 103A satisfy the relationship d <(t / 2).

  Since the eddy current is mainly generated in the surface layer of the flat conductor 101, it is sufficient that the plurality of cuts 103A are formed halfway in the thickness direction of the flat conductor 101 even if they do not penetrate in the thickness direction. It is easier to form such a shallow cut 103 </ b> A in the flat conductor 101 than to form the cut 103 that penetrates the flat conductor 101.

  In the example shown in FIG. 5, a plurality of sets of parallel cut groups 104 </ b> A each including a plurality of cuts 103 </ b> A arranged in the width direction (X-axis direction) of the flat conductor 101 are spaced apart in the longitudinal direction of the flat conductor 101. It is formed side by side. However, in the insulated wire 1 </ b> A, a plurality of cuts 103 arranged in the width direction (X-axis direction) of the flat conductor 101 may be formed in series in the longitudinal direction of the flat conductor 101.

<Third Embodiment>
Next, an insulated wire 1B according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a plan view of the flat conductor 101 in the insulated wire 1B. 6, the same components as those shown in FIG. 1 are denoted by the same reference numerals.

  The insulated wire 1B is composed of a flat conductor 101 and an insulating coating 102 (not shown). In addition, a plurality of cuts 103 are formed in the flat conductor 101 of the insulated wire 1B. The insulated wire 1B differs from the insulated wire 1 shown in FIG. 1 only in the form of the arrangement of the cuts 103 formed in the flat conductor 101. Hereinafter, only different points of the insulated wire 1B from the insulated wire 1 will be described.

  As shown in FIG. 6, in the insulated wire 1 </ b> B, a plurality of sets of parallel cut groups 104 </ b> B each including a plurality of cuts 103 arranged in the width direction (X-axis direction) of the flat conductor 101 are arranged in the width direction of the flat conductor 101. The flat conductors 101 are formed side by side in the longitudinal direction with their positions shifted.

  By applying the insulated wire 1B shown in FIG. 6 to an AC current transmission medium such as an electromagnetic induction coil, the same effect as that obtained when the insulated wire 1 is applied can be obtained. Moreover, in the insulated wire 1B, it is also possible to form a plurality of sets of parallel cut groups 104B without leaving an interval in the longitudinal direction of the flat conductor 101. Thereby, it becomes possible to form the several cut | interruption 103 more densely in the longitudinal direction of the flat conductor 101, and the inhibitory effect of an eddy current increases more.

<Fourth embodiment>
Next, an insulated wire 1C according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a plan view of the flat conductor 101 in the insulated wire 1C. In FIG. 7, the same components as those shown in FIG. 1 are given the same reference numerals.

  The insulated wire 1C is configured by a flat conductor 101 and an insulating coating 102 (not shown). A plurality of cuts 103C are formed in the flat conductor 101 of the insulated wire 1C. The insulated wire 1B differs from the insulated wire 1 shown in FIG. 1 only in the form of the arrangement of the cuts 103C formed in the flat conductor 101. Hereinafter, only differences between the insulated wire 1C and the insulated wire 1 will be described.

  As shown in FIG. 7, in the insulated wire 1 </ b> C, a plurality of sets of parallel cut groups 104 </ b> C each including a plurality of cuts 103 </ b> C arranged in the width direction (X-axis direction) of the flat conductor 101 are arranged in the longitudinal direction of the flat conductor 101. They are formed side by side at intervals. Each cut 103 is formed along a direction that obliquely intersects the width direction of the flat conductor 101.

  By applying the insulated wire 1C shown in FIG. 7 to an AC current transmission medium such as an electromagnetic induction coil, for example, the same effect as that obtained when the insulated wire 1 is applied can be obtained.

<Others>
In the insulated wires 1, 1 </ b> A, 1 </ b> B, and 1 </ b> C, if the slits 103, 103 </ b> A, and 103 </ b> C of the flat conductor 101 are slits that form a slight gap, the effect of suppressing eddy current is further enhanced. Moreover, even if the cuts 103, 103A, 103C of the flat conductor 101 are cuts that do not form a gap, an eddy current suppressing effect can be obtained.

  In the insulated wires 1B and 1C shown in FIGS. 6 and 7, the cuts 103 and 103C of the flat conductor 101 are formed from both end surfaces in the thickness direction (Z-axis direction) of the flat conductor 101, similarly to the cut 103A of the insulated wire 1A. It is also conceivable that the film is formed at a depth up to less than half of the thickness. That is, in the insulated wires 1B and 1C, it is conceivable that the thickness t of the flat conductor 101 and the depth d of each cut 103 and 103C satisfy the relationship d <(t / 2).

  The insulated wires 1, 1A, 1B, and 1C are applied to electromagnetic induction coils such as the small diameter coil 8 and the large diameter coil 9 shown in FIGS. It is also conceivable to be applied to a coil that transmits electric power by being magnetically coupled to each other. For example, a primary coil and a secondary coil that are magnetically coupled by magnetic field resonance are formed with a thickness smaller than the width, and a plurality of cuts 103, 103A, 103C are formed along the direction intersecting the width direction. It is conceivable that the coil is made of a wound wire of insulated wires 1, 1A, 1B, 1C having a flat conductor 101.

  It is also conceivable that the insulated wires 1, 1A, 1B, 1C are used as AC current transmission media other than coils. For example, the insulated wires 1, 1A, 1B, and 1C may be used as power lines that connect a battery and an inverter circuit or an inverter circuit and a motor in an electric vehicle. In addition, the flat conductor 101 of the insulated wires 1, 1A, 1B, and 1C may be used as a bus bar that connects the battery and the inverter circuit in the electric vehicle or between the inverter circuit and the motor.

1, 1A, 1B, 1C Insulated wire 2 Feeding connector set 3 Primary side feeding connector 4 Secondary side feeding connector 7 Eddy current path 8 Small diameter coil (electromagnetic induction coil)
9 Large diameter coil (electromagnetic induction coil)
DESCRIPTION OF SYMBOLS 10 Primary side magnetic body core 11 Pillar part 12 Cover part 20 Secondary side magnetic body core 30 Primary side housing | casing 31 Feeding cable 32 Covering member 40 Secondary side housing | casing 41 Opening of a secondary side housing | casing 101 Flat conductor 102 Insulation coating 103, 103A, 103C Cut 104, 104A, 104B, 104C Parallel cut group 211 Opening of secondary side magnetic core 301 Handle part

Claims (4)

  An alternating current transmission medium comprising a flat conductor having a thickness smaller than a width and having a plurality of cut lines along a direction intersecting the width direction.   The alternating current transmission medium according to claim 1, wherein the plurality of cuts are formed at a depth extending from both end faces in the thickness direction of the flat conductor to less than half of the thickness.   A coil comprising a wound wire of an insulated wire having a flat conductor having a thickness smaller than the width and having a plurality of cut lines along the direction intersecting the width direction. An electromagnetic induction coil that consists of a winding of an insulated wire and transmits electric power by electromagnetic induction with the counterpart coil in a state of overlapping with the counterpart coil;
A magnetic material made of a magnetic material, supported by a support body together with the electromagnetic induction coil, and a member formed in a shape that covers the electromagnetic induction coil over the entire hollow portion and the outer periphery together with a member of the other magnetic body A body core,
The conductor of the insulated wire is a power feeding connector, wherein the conductor is a flat conductor formed with a thickness smaller than the width and having a plurality of cuts along a direction intersecting the width direction.

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