WO2023199733A1 - ノイズ低減具及びワイヤハーネス - Google Patents

ノイズ低減具及びワイヤハーネス Download PDF

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Publication number
WO2023199733A1
WO2023199733A1 PCT/JP2023/012058 JP2023012058W WO2023199733A1 WO 2023199733 A1 WO2023199733 A1 WO 2023199733A1 JP 2023012058 W JP2023012058 W JP 2023012058W WO 2023199733 A1 WO2023199733 A1 WO 2023199733A1
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WO
WIPO (PCT)
Prior art keywords
electric wire
magnetic body
noise reduction
bundle
wire bundle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/012058
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English (en)
French (fr)
Inventor
一輝 長谷川
香織 宇佐美
仁 渡邊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yazaki Corp
Original Assignee
Yazaki Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yazaki Corp filed Critical Yazaki Corp
Priority to CN202380022787.9A priority Critical patent/CN118872395A/zh
Priority to DE112023001856.1T priority patent/DE112023001856T5/de
Publication of WO2023199733A1 publication Critical patent/WO2023199733A1/ja
Priority to US18/808,768 priority patent/US12588175B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • H01F1/113—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
    • H01F1/117—Flexible bodies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
    • H01F1/37—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles in a bonding agent
    • H01F1/375—Flexible bodies
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0098—Shielding materials for shielding electrical cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/0207—Wire harnesses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/04—Fixed inductances of the signal type with magnetic core
    • H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
    • H01F2017/065—Core mounted around conductor to absorb noise, e.g. EMI filter

Definitions

  • the present invention relates to a noise reduction device and a wire harness.
  • the noise reduction device is a member made of a magnetic material, and includes a magnetic material as a component that is attached to an electric wire through which a noise current flows to reduce the emission of radiated noise from the electric wire to the outside.
  • a noise reduction tool includes two magnetic bodies (so-called ferrite cores) formed into a semi-cylindrical shape, and these two magnetic bodies are combined to form a cylinder, and an electric wire is inserted into the space inside the cylinder. It is used in an inserted form.
  • ferrite cores two magnetic bodies formed into a semi-cylindrical shape
  • Patent Document 1 listed below discloses a noise reduction device with a chain structure in which two types of magnetic bodies are arranged alternately and one of the adjacent cylindrical magnetic bodies is connected with an elastic member and a pin.
  • Patent Document 2 listed below discloses a noise reduction device in which a plurality of trapezoidal columnar magnetic bodies are adhered to a film and the film is wound around an electric wire.
  • the noise reduction device of Patent Document 1 has a complicated structure due to its large number of component parts, and it is difficult to reduce the cost from the viewpoint of productivity and the like. Further, in the noise reduction device of Patent Document 2, since the magnetic material and the film are bonded together with an adhesive, it is difficult to ensure durability from the viewpoint of heat resistance, aging, etc.
  • an object of the present invention is to provide a noise reduction device and a wire harness that can keep the cost low while ensuring durability.
  • the noise reduction device includes a band-shaped magnetic material that can be wrapped around an axis of an electric wire or a bundle of electric wires more than once around the axis of the electric wire or the electric wire bundle made of a plurality of electric wires; fixing the overlapping portions of the laminated parts of the magnetic body in a wound shape wound around the electric wire or the electric wire bundle, and fixing the magnetic body to the electric wire or the electric wire bundle while maintaining the winding shape of the magnetic body; a fixing member, the magnetic body can change a winding diameter according to the wire diameter of the electric wire or the wire bundle diameter of the electric wire bundle, and the fixing member has a winding diameter of the magnetic body Regardless, it is characterized in that the overlapping portions are fixed to each other in accordance with the winding diameter.
  • the wire harness according to the present invention includes an electric wire or an electric wire bundle in which a plurality of electric wires are bundled together, and a noise reduction device that reduces emission of radiated noise from the electric wire or the electric wire bundle to the outside.
  • the noise reduction device includes a band-shaped magnetic material that can be wrapped around the axis of the electric wire or the electric wire bundle more than once around the electric wire or the electric wire bundle; a fixing member that fixes overlapping portions of laminated portions of the wound magnetic body to each other and fixes the magnetic body to the electric wire or the electric wire bundle while maintaining the winding shape of the magnetic body;
  • the winding diameter of the magnetic body can be changed according to the wire diameter of the electric wire or the wire bundle diameter of the electric wire bundle, and the fixing member can change the winding diameter of the magnetic body regardless of the winding diameter of the magnetic body. It is characterized in that the corresponding overlapping parts are fixed to each other.
  • the noise reduction device has a simple structure in which the main components are only a magnetic body and a fixing member, and the magnetic body is simply wound around an electric wire or a bundle of electric wires and fixed with a fixing member. Therefore, this noise reduction tool has excellent productivity and can reduce cost.
  • this noise reduction device can be applied to wires with various wire diameters and lengths, and wire bundles with various wire bundle diameters and lengths, so that it can be used in common among various wires and wire bundles. Therefore, the cost of this noise reduction tool can be reduced in this respect as well.
  • this noise reduction device also has the function of bundling multiple electric wires into a wire bundle, so for example, it is possible to eliminate the need for cable ties or adhesive tape for bundling multiple electric wires. It is possible to reduce the number of tapes and the amount used. Therefore, the cost of this noise reduction tool can be reduced in this respect as well. Furthermore, since this noise reduction tool does not use adhesive, it has high heat resistance and resistance to changes over time, and can ensure high durability. In this way, the noise reduction device according to the present invention can keep the cost low while ensuring high durability.
  • the wire harness according to the present invention includes this noise reduction device, and can produce the same effects as those obtained by this noise reduction device.
  • FIG. 1 is a perspective view schematically showing a wire harness in which a noise reduction device according to an embodiment is assembled.
  • FIG. 2 is a schematic diagram of the wire harness in which the noise reduction device of the embodiment is assembled, viewed in the axial direction.
  • FIG. 3 is a plan view schematically showing the noise reduction tool before assembly.
  • FIG. 4 is a perspective view schematically showing an example of the fixing member.
  • FIG. 5 is a plan view schematically showing an example of a state in which the overlapping portions are fixed to each other by a fixing member.
  • FIG. 6 is a plan view schematically showing, together with another example, a state in which the overlapping portions are fixed to each other by a fixing member.
  • FIGS. 1 to 6 One embodiment of a noise reduction device and a wire harness according to the present invention will be described based on FIGS. 1 to 6.
  • the reference numeral 1 shown in FIGS. 1 and 2 indicates the noise reduction tool of this embodiment.
  • This noise reduction tool 1 is attached to an electric wire We through which a noise current flows, and reduces emission of radiation noise from the electric wire We to the outside.
  • the noise reduction tool 1 can be attached to an electric wire bundle Web (a wire bundle Web where a noise current flows among the plurality of electric wires) by attaching the electric wire This reduces the emission of radiated noise from the electric wire (We) to the outside.
  • the symbol WH shown in FIGS. 1 and 2 indicates a wire harness in which the noise reduction tool 1 is assembled to the electric wire We or the electric wire bundle Web.
  • One or more noise reduction tools 1 are provided depending on the length of the electric wire We or the electric wire bundle Web.
  • This wire harness WH is mounted on an electric vehicle (not shown) such as a BEV (Battery Electric Vehicle) or a PHEV (Plug-in Hybrid Electric Vehicle), for example.
  • this wire harness WH is installed between a secondary battery for driving an electric vehicle and a secondary battery for auxiliary equipment, and between a DC/DC converter and a secondary battery for auxiliary equipment interposed between the two. make a physical and electrical connection between the two.
  • This wire harness WH is responsible for feeding power from the driving secondary battery to the auxiliary secondary battery when charging the auxiliary secondary battery.
  • this wire harness WH is used, for example, in a charging system (not shown) for charging a secondary battery for driving and a secondary battery for auxiliary equipment of an electric vehicle.
  • This charging system is configured for normal charging or quick charging, regardless of whether it is for business or home use.
  • This charging system includes an external power source, a charger body supplied with power from the external power source, and a charging cable with a connector for feeding power from the charger body to the vehicle side.
  • a charging cable with a connector is used by a worker when supplying power, and includes at least a charging cable provided with a power line (wire We) and a charging connector attached to one terminal of the charging cable. Be prepared.
  • some charging systems perform charging control while communicating between the vehicle and the charger body during power supply.
  • the charging cable in this case is also provided with a communication signal line responsible for the communication.
  • a three-phase AC power source is used as the external power source, and an AC/DC converter that converts the AC voltage to DC voltage is housed in the casing of the charger body. ing.
  • the charging cable with a connector supplies the converted power to the vehicle side.
  • the charging cable with a connector is assembled in advance to the charger main body, and may constitute the charger together with the charger main body.
  • This charging cable with a connector is routed from the charger main body side to the vehicle side when charging, and the charging connector is physically and electrically connected to the connector of the electric vehicle (vehicle side connector).
  • the charging cable with a connector may be a separate component that is housed in the luggage compartment of a vehicle, and a power source side connector may be attached to the other end of the charging cable.
  • the charger body constitutes a charger.
  • the power supply side connector is physically and electrically connected to the connector on the charger body, and the charging connector is physically and electrically connected to the vehicle side connector. Connect.
  • This charging system is provided with an internal charging cable that electrically connects the AC/DC converter side and the charging cable side within the casing of the charger main body.
  • This internal charging cable includes at least an internal power line (electric wire We), and electrically connects the AC/DC converter side and the charging cable side by this internal power line. Therefore, in this charging system, the wire harness WH of this embodiment includes the internal charging cable to which the noise reduction tool 1 is attached. Note that when performing the above communication during charging, the internal charging cable is also provided with an internal communication signal line.
  • the wire harness WH of this embodiment is a charging cable with a connector and the noise reduction device 1 attached thereto.
  • the noise reduction device 1 includes a band-shaped magnetic material 10 that can be wrapped around the axis of the electric wire We or the electric wire bundle Web more than once, and a magnetic material 10 that can be wound around the electric wire We or the electric wire bundle Web.
  • a fixing member that fixes the overlapping parts 11a and 11b of the laminated portion 11 of the magnetic body 10 in a wound shape, and fixes the magnetic body 10 to the electric wire We or the electric wire bundle Web while maintaining the winding shape of the magnetic body 10. 20 (FIGS. 1 to 6).
  • the magnetic body 10 is made of a ferromagnetic material and is molded with flexibility. Ferrite or the like is used as the ferromagnetic material.
  • This magnetic body 10 has a length that corresponds to the wire diameter of the wire We to be wound or the wire bundle diameter of the wire bundle Web, and is wound around the wire We or the wire bundle Web more than once.
  • the overlapping portions 11a and 11b of the laminated portion 11 are formed into a belt shape having a length that allows the fixing member 20 to fix the overlapping portions 11a and 11b to each other.
  • this magnetic body 10 can be wound more than once around the electric wire We of the maximum electric wire diameter or the electric wire bundle Web of the maximum electric wire bundle diameter, and the overlapping portion 11a of the laminated portion 11, 11b are formed into a belt shape with a length that allows them to be fixed together with the fixing member 20.
  • the magnetic body 10 is an electric wire We having a wire diameter less than or equal to the maximum electric wire diameter or an electric wire bundle Web having an electric wire bundle diameter less than or equal to the maximum electric wire bundle diameter
  • the magnetic body 10 can be The winding diameter can be changed depending on the bundle diameter.
  • the fixing member 20 is formed to be capable of fixing the overlapping portions 11a and 11b to each other in accordance with the winding diameter, regardless of the winding diameter of the magnetic body 10.
  • the fixing member 20 illustrated here has a protrusion that engages at least one of the overlapping parts 11a (11b) in the laminated portion 11 to fix the overlapping parts 11a and 11b to each other.
  • the fixing member 20 has a first fixing part 21 and a second fixing part 22 (FIGS. 3 to 6).
  • the first fixing part 21 and the second fixing part 22 may be separate from each other, or may be integrated via a living hinge or the like.
  • a first fixing part 21 and a second fixing part 22 which are separate bodies are shown.
  • a plurality of protrusions are provided on at least one of the first fixing part 21 and the second fixing part 22.
  • a plurality of protrusions are provided on one of the first fixing part 21 and the second fixing part 22, and at least one overlapping part 11a (11b) is provided on the other of the protrusions.
  • a clamping part is provided between the two.
  • the holding portion may be a wall surface such as a smooth surface on the other of the first fixing portion 21 and the second fixing portion 22, or may be a groove for each protrusion that pairs with the protrusion.
  • the first fixing part 21 shown here has a plurality of first protrusions 20a and first grooves 20b arranged alternately (FIG. 4).
  • the second fixing part 22 shown here has a plurality of second protrusions 20c and second grooves 20d arranged alternately (FIG. 4).
  • one first protrusion 20a and one second groove 20d form a pair
  • one second protrusion 20c and one first groove 20b form a pair.
  • the first protrusion 20a and the second groove 20d are formed in a shape that allows the first protrusion 20a to fit into the second groove 20d for each combination.
  • the second protrusion 20c and the first groove 20b are formed in a shape that allows the second protrusion 20c to fit into the first groove 20b for each combination.
  • the first fixing part 21 is integrated with one end of the magnetic body 10 in the longitudinal direction (FIG. 3).
  • one end of the magnetic body 10 becomes one overlapping part 11a, and the other overlapping part 11b exists at the other end in the longitudinal direction of the magnetic body 10 after winding.
  • the first fixing portion 21 may be formed integrally with the magnetic body 10 using the same ferromagnetic material as the magnetic body 10 if its shape can be shaped.
  • the first fixing part 21 can be made of an insulating material such as synthetic resin using the integral molding technique. It can be made of any material.
  • the magnetic body 10 is wound around the electric wire We or the electric wire bundle Web, and the other end side of the magnetic body 10 is attached to the first fixing part 21 in the overlapping part 11a (one end part) of the magnetic body 10. Overlap.
  • the portion on the other end side of the magnetic body 10 that overlaps with the first fixing portion 21 becomes the overlapping portion 11b.
  • the superimposed part 11b is sandwiched between the first fixing part 21 and the second fixing part 22 of the superimposing part 11a, and the first protrusion 20a between the second groove 20d and the overlapping part 11b, and for each combination of the second protrusion 20c and the first groove 20b, the second protrusion 20c is overlapped with the first groove 20b.
  • the overlapping portions 11a and 11b are fixed to each other (FIG. 5).
  • At least two locking mechanisms are provided between the first fixing part 21 and the second fixing part 22 for fixing them to each other in order to maintain the biting state with respect to the overlapping part 11b.
  • This locking mechanism is provided with, for example, a claw-shaped first engaging part provided on the first fixing part 21 and a claw-shaped first engaging part provided on the second fixing part 22, and when the claw-shaped first engaging part is caught, the first fixing part 21 and A second engaging portion that fixes the second fixing portion 22 in a biting state with respect to the overlapping portion 11b is provided.
  • at least one locking mechanism may be provided.
  • the fixing member 20 may be molded as a separate component from the magnetic body 10 (FIG. 6). In this case, the fixing member 20 is fixed by sandwiching the overlapping parts 11a and 11b of the laminated portion 11 between the first fixing part 21 and the second fixing part 22. In this fixing member 20, for each combination of the first protrusion 20a and the second groove 20d, the first protrusion 20a and the second groove 20d are bitten into the overlapping parts 11a and 11b, and the second For each combination of the protrusion 20c and the first groove 20b, the second protrusion 20c and the first groove 20b are bitten into the overlapped parts 11a and 11b, thereby fixing the overlapped parts 11a and 11b to each other. In this fixing member 20 as well, a locking mechanism is provided between the first fixing part 21 and the second fixing part 22 to fix them to each other in order to maintain the biting state with respect to the overlapping parts 11a and 11b.
  • the main components of the noise reduction tool 1 of this embodiment are only the magnetic body 10 and the fixing member 20, and the magnetic body 10 is wound around the electric wire We or the electric wire bundle Web and fixed by the fixing member 20. It has a simple structure that allows you to do just that. Therefore, this noise reduction tool 1 has excellent productivity and can reduce the cost.
  • this noise reduction tool 1 can be applied to electric wires We of various electric wire diameters and lengths and electric wire bundles Web of various electric wire bundle diameters and lengths, so it can be used in common among various electric wires We and electric wire bundles Web. becomes possible. Therefore, this noise reduction tool 1 can also reduce the cost in this respect.
  • this noise reduction tool 1 also has the function of bundling a plurality of electric wires We together as a wire bundle Web, so that, for example, it is possible to eliminate the need for a binding band or adhesive tape for bundling a plurality of electric wires We. It is possible to reduce the number and usage of cable ties and adhesive tape. Therefore, this noise reduction tool 1 can also reduce the cost in this respect. Furthermore, since this noise reduction tool 1 does not use adhesive, it has high heat resistance and resistance to changes over time, and can ensure high durability. In this way, the noise reduction tool 1 of this embodiment can keep the cost low while ensuring high durability.
  • the noise reduction tool 1 can be applied to the electric vehicle or charging system to achieve high durability. This will contribute to the spread of electric vehicles and charging systems, as it will make it possible to secure energy efficiency and reduce costs.
  • the wire harness WH of this embodiment includes this noise reduction tool 1, and can produce the same effects as those obtained by this noise reduction tool 1.
  • a charging system configured for quick charging is more likely to generate noise than one configured for normal charging. Therefore, the noise reduction device 1 and the wire harness WH of this embodiment are particularly useful in a charging system for rapid charging and an electric vehicle capable of rapid charging using the charging system.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Civil Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Hard Magnetic Materials (AREA)
  • Soft Magnetic Materials (AREA)
  • Details Of Indoor Wiring (AREA)

Abstract

電線（Ｗｅ）又は複数本の電線（Ｗｅ）を一纏めに束ねた電線束（Ｗｅｂ）に対して当該電線（Ｗｅ）又は当該電線束（Ｗｅｂ）の軸周りに１周よりも多く巻き付け可能な帯状の磁性体（１０）と、電線（Ｗｅ）又は電線束（Ｗｅｂ）に巻き付けた巻回形状の磁性体（１０）における積層部分（１１）の重畳部（１１ａ，１１ｂ）同士を固定して、磁性体（１０）の巻回形状を保ちつつ磁性体（１０）を電線（Ｗｅ）又は電線束（Ｗｅｂ）に固定する固定部材（２０）と、を備え、磁性体（１０）は、電線（Ｗｅ）の電線径又は電線束（Ｗｅｂ）の電線束径に応じて巻き径を変えることが可能であり、固定部材（２０）は、磁性体（１０）の巻き径に拘わらず、その巻き径に応じた重畳部（１１ａ，１１ｂ）同士を固定すること。

Description

ノイズ低減具及びワイヤハーネス
　本発明は、ノイズ低減具及びワイヤハーネスに関する。
　ノイズ低減具は、磁性材料から成る部材であり、ノイズ電流の流れる電線に取り付けて、その電線から出た放射ノイズの外部への放出を低減させる磁性体を構成部品として備える。例えば、ノイズ低減具は、半円筒形状に成形された２つの磁性体（所謂フェライトコア）を備え、この２つの磁性体を組み合わせて円筒状に形成し、その円筒の内方の空間に電線を挿通させた形で使用される。しかしながら、このような磁性体を利用するノイズ低減具は、径の大きく異なる電線間での共用化が難しく、また、径の大きく異なる電線間での構成部品の共用化すらも難しい。このため、この技術分野では、少なくとも構成部品を径の異なる電線間で共用可能なノイズ低減具が望まれている。例えば、下記の特許文献１には、２種類の磁性体を交互に並べ、隣り合う一方の円筒状の磁性体同士を弾性部材とピンで連結させたチェーン構造のノイズ低減具が開示されている。また、下記の特許文献２には、複数の台形柱状の磁性体をフィルムに接着し、これを電線に巻き付けるノイズ低減具が開示されている。
特開２００２－３７４０９０号公報 特開平７－２９７５８８号公報
　しかしながら、上記特許文献１のノイズ低減具は、その構成部品の多さ故、構造が複雑であり、生産性等の観点から原価の低減が難しい。また、上記特許文献２のノイズ低減具は、磁性体とフィルムを接着剤で接着させるので、耐熱性や経年変化等の観点から耐久性の確保が難しい。
　そこで、本発明は、耐久性を確保しつつ原価を低く抑え得るノイズ低減具及びワイヤハーネスを提供することを、その目的とする。
　本発明に係るノイズ低減具は、電線又は複数本の電線を一纏めに束ねた電線束に対して当該電線又は当該電線束の軸周りに１周よりも多く巻き付け可能な帯状の磁性体と、前記電線又は前記電線束に巻き付けた巻回形状の前記磁性体における積層部分の重畳部同士を固定して、前記磁性体の前記巻回形状を保ちつつ前記磁性体を前記電線又は前記電線束に固定する固定部材と、を備え、前記磁性体は、前記電線の電線径又は前記電線束の電線束径に応じて巻き径を変えることが可能であり、前記固定部材は、前記磁性体の巻き径に拘わらず、その巻き径に応じた前記重畳部同士を固定することを特徴とする。
　また、本発明に係るワイヤハーネスは、電線又は複数本の電線を一纏めに束ねた電線束と、前記電線又は前記電線束から出た放射ノイズの外部への放出を低減させるノイズ低減具と、を備え、前記ノイズ低減具は、前記電線又は前記電線束に対して当該電線又は当該電線束の軸周りに１周よりも多く巻き付け可能な帯状の磁性体と、前記電線又は前記電線束に巻き付けた巻回形状の前記磁性体における積層部分の重畳部同士を固定して、前記磁性体の前記巻回形状を保ちつつ前記磁性体を前記電線又は前記電線束に固定する固定部材と、を備え、前記磁性体は、前記電線の電線径又は前記電線束の電線束径に応じて巻き径を変えることが可能であり、前記固定部材は、前記磁性体の巻き径に拘わらず、その巻き径に応じた前記重畳部同士を固定することを特徴とする。
　本発明に係るノイズ低減具は、その主要構成が磁性体と固定部材だけで、かつ、磁性体を電線又は電線束に巻き付けて固定部材で固定するだけの簡素な構造を採っている。このため、このノイズ低減具は、生産性に優れたものとなり、原価の低減を図ることができる。また、このノイズ低減具は、様々な電線径や長さの電線と様々な電線束径や長さの電線束に適応できるので、多様な電線や電線束の間での共用化が可能になる。このため、このノイズ低減具は、この点でも原価の低減を図ることができる。また、このノイズ低減具は、複数本の電線を電線束として束ねる機能も兼ねているので、例えば、複数本の電線を束ねるための結束バンドや粘着テープを不要にできたり、その結束バンドや粘着テープの数量や使用量を減らしたりすることができる。このため、このノイズ低減具は、この点でも原価の低減を図ることができる。更に、このノイズ低減具は、接着剤を用いていないので、耐熱性が高く且つ経年変化にも強く、高い耐久性を確保することができる。このように、本発明に係るノイズ低減具は、高い耐久性を確保しつつ原価を低く抑えることができる。そして、本発明に係るワイヤハーネスは、このノイズ低減具を具備するものであり、このノイズ低減具によって得られるものと同様の効果を奏することができる。
図１は、実施形態のノイズ低減具が組み付けられたワイヤハーネスを模式的に示す斜視図である。 図２は、実施形態のノイズ低減具が組み付けられたワイヤハーネスを軸線方向に見た模式図である。 図３は、組付け前のノイズ低減具を模式的に示す平面図である。 図４は、固定部材の一例を模式的に示す斜視図である。 図５は、固定部材による重畳部同士の固定状態についてその一例と共に模式的に示す平面図である。 図６は、固定部材による重畳部同士の固定状態について他の一例と共に模式的に示す平面図である。
　以下に、本発明に係るノイズ低減具及びワイヤハーネスの実施形態を図面に基づいて詳細に説明する。尚、この実施形態によりこの発明が限定されるものではない。
［実施形態］
　本発明に係るノイズ低減具及びワイヤハーネスの実施形態の１つを図１から図６に基づいて説明する。
　図１及び図２に示す符号１は、本実施形態のノイズ低減具を示す。このノイズ低減具１は、ノイズ電流の流れる電線Ｗｅに取り付けて、この電線Ｗｅから出た放射ノイズの外部への放出を低減させる。または、このノイズ低減具１は、ノイズ電流の流れる電線Ｗｅが含まれる複数本の電線を一纏めに束ねた電線束Ｗｅｂに取り付けて、この電線束Ｗｅｂ（複数本の電線の内のノイズ電流の流れる電線Ｗｅ）から出た放射ノイズの外部への放出を低減させる。図１及び図２に示す符号ＷＨは、そのノイズ低減具１が電線Ｗｅ又は電線束Ｗｅｂに組み付けられたワイヤハーネスを示す。ノイズ低減具１は、電線Ｗｅ又は電線束Ｗｅｂの長さに応じて１つ又は複数設ける。
　このワイヤハーネスＷＨは、例えば、ＢＥＶ（Ｂａｔｔｅｒｙ　Ｅｌｅｃｔｒｉｃ　Ｖｅｈｉｃｌｅ）やＰＨＥＶ（Ｐｌｕｇ－ｉｎ　Ｈｙｂｒｉｄ　Ｅｌｅｃｔｒｉｃ　Ｖｅｈｉｃｌｅ）等の電気自動車（図示略）に車載される。具体的な一例として、このワイヤハーネスＷＨは、電気自動車の駆動用二次電池と補機用二次電池との間にて、この間に介在するＤＣ／ＤＣコンバータと補機用二次電池との間を物理的且つ電気的に接続させる。このワイヤハーネスＷＨは、補機用二次電池を充電する際に、駆動用二次電池から補機用二次電池への給電を担っている。
　また、このワイヤハーネスＷＨは、例えば、電気自動車の駆動用二次電池と補機用二次電池への充電を行うための充電システム（図示略）に用いられる。
　この充電システムは、業務用や家庭用に拘わらず、普通充電用又は急速充電用として構成されたものである。この充電システムは、外部電源と、この外部電源から電力供給される充電器本体と、この充電器本体から車両側に給電するためのコネクタ付き充電ケーブルと、を備える。コネクタ付き充電ケーブルは、その給電に際して作業者に使用されるものであり、少なくとも電力線（電線Ｗｅ）が設けられている充電ケーブルと、この充電ケーブルの一方の端末に取り付けられた充電コネクタと、を備える。ここで、充電システムについては、その給電に際して車両と充電器本体との間で通信しながら充電制御を行うものもある。この場合の充電ケーブルには、その通信を担う通信信号線も設けられている。
　例えば、この充電システムを急速充電用として構成する場合には、外部電源に三相交流電源が用いられ、その交流電圧を直流電圧に変換するＡＣ／ＤＣコンバータが充電器本体の筐体内に収容されている。この場合のコネクタ付き充電ケーブルは、その変換後の電力を車両側に供給する。
　コネクタ付き充電ケーブルは、充電器本体に対して予め組み付けられたものであり、この充電器本体と共に充電器を構成するものであってもよい。このコネクタ付き充電ケーブルについては、充電する際に充電器本体側から車両側に引き回し、充電コネクタを電気自動車のコネクタ（車両側コネクタ）に対して物理的且つ電気的に接続させる。
　一方、コネクタ付き充電ケーブルは、車両の荷室に収容されるなどする単独の部品であり、充電ケーブルの他方の端末に電源側コネクタが取り付けられたものであってもよい。この場合には、充電器本体が充電器を構成する。このコネクタ付き充電ケーブルについては、充電する際に、電源側コネクタを充電器本体のコネクタに対して物理的且つ電気的に接続させると共に、充電コネクタを車両側コネクタに対して物理的且つ電気的に接続させる。
　この充電システムには、充電器本体の筐体内に、ＡＣ／ＤＣコンバータ側と充電ケーブル側とを電気接続させる内部充電ケーブルが設けられている。この内部充電ケーブルは、少なくとも内部電力線（電線Ｗｅ）を備え、この内部電力線によってＡＣ／ＤＣコンバータ側と充電ケーブル側とを電気接続させる。よって、この充電システムにおいては、この内部充電ケーブルにノイズ低減具１を取り付けたものが本実施形態のワイヤハーネスＷＨとなる。尚、充電に際して先の通信を行う場合、内部充電ケーブルには、内部通信信号線も設けられている。また、この充電システムにおいては、コネクタ付き充電ケーブルの充電ケーブルにノイズ低減具１を取り付けたものが本実施形態のワイヤハーネスＷＨとなる。
　以下、本実施形態のノイズ低減具１及びワイヤハーネスＷＨについて具体的に説明する。
　ノイズ低減具１は、電線Ｗｅ又は電線束Ｗｅｂに対して当該電線Ｗｅ又は当該電線束Ｗｅｂの軸周りに１周よりも多く巻き付け可能な帯状の磁性体１０と、電線Ｗｅ又は電線束Ｗｅｂに巻き付けた巻回形状の磁性体１０における積層部分１１の重畳部１１ａ，１１ｂ同士を固定して、その磁性体１０の巻回形状を保ちつつ磁性体１０を電線Ｗｅ又は電線束Ｗｅｂに固定する固定部材２０と、を備える（図１から図６）。
　磁性体１０は、強磁性材料で柔軟性を持たせて成形される。その強磁性材料としては、フェライト等が用いられる。
　この磁性体１０は、巻き付け対象の電線Ｗｅの電線径又は電線束Ｗｅｂの電線束径に応じた長さで、かつ、その電線Ｗｅ又は電線束Ｗｅｂに１周よりも多く巻き付けた上で、その積層部分１１の重畳部１１ａ，１１ｂ同士を固定部材２０で固定することのできる長さの帯状に成形される。例えば、この磁性体１０は、巻き付け対象となる最大電線径の電線Ｗｅ又は最大電線束径の電線束Ｗｅｂに対して１周よりも多く巻き付け可能で、かつ、その積層部分１１の重畳部１１ａ，１１ｂ同士を固定部材２０で固定することのできる長さの帯状に成形される。つまり、この磁性体１０は、その最大電線径以下の電線径の電線Ｗｅ又はその最大電線束径以下の電線束径の電線束Ｗｅｂであれば、その電線Ｗｅの電線径又は電線束Ｗｅｂの電線束径に応じて巻き径を変えることができる。
　固定部材２０は、磁性体１０の巻き径に拘わらず、その巻き径に応じた重畳部１１ａ，１１ｂ同士を固定することのできるものとして形成する。具体的に、ここで例示する固定部材２０は、積層部分１１における少なくとも一方の重畳部１１ａ（１１ｂ）に噛み込ませて重畳部１１ａ，１１ｂ同士を固定する突起部を有している。
　固定部材２０は、第１固定部２１と第２固定部２２を有している（図３から図６）。この第１固定部２１と第２固定部２２は、互いに別体のものであってもよく、リビングヒンジ等を介して一体化されたものであってもよい。ここでは、別体の第１固定部２１と第２固定部２２を示している。
　この固定部材２０においては、第１固定部２１と第２固定部２２の内の少なくとも一方に突起部を複数設ける。例えば、この固定部材２０においては、第１固定部２１と第２固定部２２の内の一方に突起部を複数設け、その内の他方に少なくとも一方の重畳部１１ａ（１１ｂ）を突起部との間で挟み込む挟持部を設ける。その挟持部とは、第１固定部２１と第２固定部２２の内の他方における平滑面等の壁面であってもよく、突起部と対になる突起部毎の溝部であってもよい。
　ここで示す第１固定部２１は、交互に複数並べられた第１突起部２０ａと第１溝部２０ｂを有している（図４）。一方、ここで示す第２固定部２２は、交互に複数並べられた第２突起部２０ｃと第２溝部２０ｄを有している（図４）。この固定部材２０においては、１つの第１突起部２０ａと１つの第２溝部２０ｄとが対になり、かつ、１つの第２突起部２０ｃと１つの第１溝部２０ｂとが対になる。そして、その第１突起部２０ａと第２溝部２０ｄは、その組み合わせ毎に、第２溝部２０ｄの中に第１突起部２０ａを入り込ませることのできる形状に形成されている。また、第２突起部２０ｃと第１溝部２０ｂは、その組み合わせ毎に、第１溝部２０ｂの中に第２突起部２０ｃを入り込ませることのできる形状に形成されている。
　この固定部材２０においては、第１固定部２１を磁性体１０の長手方向の一端部に対して一体化させている（図３）。この場合、磁性体１０においては、その一端部が一方の重畳部１１ａになり、巻き付け後の磁性体１０の長手方向の他端部側に他方の重畳部１１ｂが存在する。例えば、第１固定部２１は、その形状を形作ることができるのであれば、磁性体１０と同じ強磁性材料で当該磁性体１０と一体のものとして形成すればよい。また、例えば、第１固定部２１は、磁性体１０との間でインサート成形や２色成形等の一体成形技術の適用が可能であれば、その一体成形技術を用いて合成樹脂等の絶縁性材料で形成すればよい。
　このノイズ低減具１においては、磁性体１０を電線Ｗｅ又は電線束Ｗｅｂに巻き付けて、この磁性体１０の重畳部１１ａ（一端部）における第１固定部２１に磁性体１０の他端部側を重ね合わせる。ここでは、磁性体１０の他端部側にて、第１固定部２１に重ね合わされている部分が重畳部１１ｂとなる。この固定部材２０においては、その重畳部１１ｂを重畳部１１ａの第１固定部２１と第２固定部２２とで挟み込み、第１突起部２０ａと第２溝部２０ｄの組み合わせ毎に、第１突起部２０ａを第２溝部２０ｄとの間で重畳部１１ｂに噛み込ませ、かつ、第２突起部２０ｃと第１溝部２０ｂの組み合わせ毎に、第２突起部２０ｃを第１溝部２０ｂとの間で重畳部１１ｂに噛み込ませることによって、その重畳部１１ａ，１１ｂ同士を固定する（図５）。
　この固定部材２０においては、その重畳部１１ｂに対する噛み込み状態を保つべく、第１固定部２１と第２固定部２２との間に、その相互間を固定するロック機構を少なくとも２つ設けている（図示略）。このロック機構は、第１固定部２１に設けた例えば爪状の第１係合部と、第２固定部２２に設け、爪状の第１係合部が引っ掛かって、第１固定部２１と第２固定部２２を重畳部１１ｂに対する噛み込み状態のまま固定する第２係合部と、を備える。尚、第１固定部２１と第２固定部２２が先のリビングヒンジ等で一体化されている場合には、そのロック機構を少なくとも１つ設ければよい。
　また、固定部材２０は、磁性体１０とは別の部品として成形されたものであってもよい（図６）。この場合、固定部材２０は、第１固定部２１と第２固定部２２で積層部分１１の重畳部１１ａ，１１ｂを挟み込んで固定する。この固定部材２０においては、第１突起部２０ａと第２溝部２０ｄの組み合わせ毎に、第１突起部２０ａを第２溝部２０ｄとの間で重畳部１１ａ，１１ｂに噛み込ませ、かつ、第２突起部２０ｃと第１溝部２０ｂの組み合わせ毎に、第２突起部２０ｃを第１溝部２０ｂとの間で重畳部１１ａ，１１ｂに噛み込ませることによって、その重畳部１１ａ，１１ｂ同士を固定する。この固定部材２０においても、第１固定部２１と第２固定部２２との間には、その重畳部１１ａ，１１ｂに対する噛み込み状態を保つべく、その相互間を固定するロック機構を設ける。
　以上示したように、本実施形態のノイズ低減具１は、その主要構成が磁性体１０と固定部材２０だけで、かつ、磁性体１０を電線Ｗｅ又は電線束Ｗｅｂに巻き付けて固定部材２０で固定するだけの簡素な構造を採っている。このため、このノイズ低減具１は、生産性に優れたものとなり、原価の低減を図ることができる。また、このノイズ低減具１は、様々な電線径や長さの電線Ｗｅと様々な電線束径や長さの電線束Ｗｅｂに適応できるので、多様な電線Ｗｅや電線束Ｗｅｂの間での共用化が可能になる。このため、このノイズ低減具１は、この点でも原価の低減を図ることができる。また、このノイズ低減具１は、複数本の電線Ｗｅを電線束Ｗｅｂとして束ねる機能も兼ねているので、例えば、複数本の電線Ｗｅを束ねるための結束バンドや粘着テープを不要にできたり、その結束バンドや粘着テープの数量や使用量を減らしたりすることができる。このため、このノイズ低減具１は、この点でも原価の低減を図ることができる。更に、このノイズ低減具１は、接着剤を用いていないので、耐熱性が高く且つ経年変化にも強く、高い耐久性を確保することができる。このように、本実施形態のノイズ低減具１は、高い耐久性を確保しつつ原価を低く抑えることができる。従って、このノイズ低減具１は、先の電気自動車や充電システム（普通充電用であるのか急速充電用であるのかに拘わらず）に適用することによって、この電気自動車や充電システムにおいても高い耐久性の確保と原価低減を可能にするので、電気自動車や充電システムの普及に寄与するものとなる。そして、本実施形態のワイヤハーネスＷＨは、このノイズ低減具１を具備するものであり、このノイズ低減具１によって得られるものと同様の効果を奏することができる。
　更に、充電システムは、普通充電用として構成されたものよりも急速充電用として構成されたものの方でノイズの発生する可能性が高くなる。従って、本実施形態のノイズ低減具１及びワイヤハーネスＷＨは、特に急速充電用の充電システムや当該充電システムを用いた急速充電が可能な電気自動車において有用なものとなる。
　１　ノイズ低減具
　１０　磁性体
　１１　積層部分
　１１ａ，１１ｂ　重畳部
　２０　固定部材
　２０ａ　第１突起部
　２０ｃ　第２突起部
　Ｗｅ　電線
　Ｗｅｂ　電線束
　ＷＨ　ワイヤハーネス

Claims (3)

  1. 　電線又は複数本の電線を一纏めに束ねた電線束に対して当該電線又は当該電線束の軸周りに１周よりも多く巻き付け可能な帯状の磁性体と、
    　前記電線又は前記電線束に巻き付けた巻回形状の前記磁性体における積層部分の重畳部同士を固定して、前記磁性体の前記巻回形状を保ちつつ前記磁性体を前記電線又は前記電線束に固定する固定部材と、
    　を備え、
    　前記磁性体は、前記電線の電線径又は前記電線束の電線束径に応じて巻き径を変えることが可能であり、
    　前記固定部材は、前記磁性体の巻き径に拘わらず、その巻き径に応じた前記重畳部同士を固定するノイズ低減具。
  2. 　前記固定部材は、前記積層部分における少なくとも一方の前記重畳部に噛み込ませて前記重畳部同士を固定する突起部を有する請求項１に記載のノイズ低減具。
  3. 　電線又は複数本の電線を一纏めに束ねた電線束と、
    　前記電線又は前記電線束から出た放射ノイズの外部への放出を低減させるノイズ低減具と、
    　を備え、
    　前記ノイズ低減具は、
    　前記電線又は前記電線束に対して当該電線又は当該電線束の軸周りに１周よりも多く巻き付け可能な帯状の磁性体と、
    　前記電線又は前記電線束に巻き付けた巻回形状の前記磁性体における積層部分の重畳部同士を固定して、前記磁性体の前記巻回形状を保ちつつ前記磁性体を前記電線又は前記電線束に固定する固定部材と、
    　を備え、
    　前記磁性体は、前記電線の電線径又は前記電線束の電線束径に応じて巻き径を変えることが可能であり、
    　前記固定部材は、前記磁性体の巻き径に拘わらず、その巻き径に応じた前記重畳部同士を固定するワイヤハーネス。
PCT/JP2023/012058 2022-04-11 2023-03-25 ノイズ低減具及びワイヤハーネス Ceased WO2023199733A1 (ja)

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