WO2019229790A1 - Ground-side coil unit - Google Patents

Ground-side coil unit Download PDF

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Publication number
WO2019229790A1
WO2019229790A1 PCT/JP2018/020292 JP2018020292W WO2019229790A1 WO 2019229790 A1 WO2019229790 A1 WO 2019229790A1 JP 2018020292 W JP2018020292 W JP 2018020292W WO 2019229790 A1 WO2019229790 A1 WO 2019229790A1
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WO
WIPO (PCT)
Prior art keywords
coil
groove
power
ground
unit
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PCT/JP2018/020292
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French (fr)
Japanese (ja)
Inventor
有二 成瀬
成幸 吉田
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日産自動車株式会社
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Priority to PCT/JP2018/020292 priority Critical patent/WO2019229790A1/en
Publication of WO2019229790A1 publication Critical patent/WO2019229790A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings

Definitions

  • the present invention relates to a ground side coil unit.
  • Patent Document 1 a ground-side coil unit disposed on the ground that transmits power in a non-contact manner with a power receiving coil unit disposed in a vehicle is known (see Patent Document 1).
  • Patent Document 1 describes a foreign object detection device for a coil device including a second coil for transmitting power to or receiving power from the first coil in a non-contact manner.
  • the foreign object detection device includes a foreign object detection coil positioned between the first coil and the second coil, and a cover that covers an upper portion of the foreign object detection coil.
  • the upper surface of the cover includes at least one inclined surface inclined with respect to the coil surface of the second coil, and the inclined surface detects the detection sensitivity of the foreign matter detection coil from the low sensitivity region where the detection sensitivity of the foreign matter detection coil is relatively low. Is inclined downward toward a relatively high sensitive region.
  • the ground side coil unit generally has a coil constituted by windings and a coil cover that covers the coil from above. If foreign matter is placed on the upper surface of the coil cover along a direction orthogonal to the winding, the foreign matter on the upper surface of the coil cover may be heated.
  • an object of the present invention is to provide a ground side coil unit capable of suppressing the heating of foreign matter on the upper surface of the coil cover.
  • the ground side coil unit includes a coil cover that covers the coil from above.
  • a plurality of grooves are formed on the upper surface of the coil cover, and the grooves extend in a direction having a predetermined angle with respect to a direction orthogonal to the coil winding in plan view.
  • FIG. 1 is a diagram illustrating an example of the overall configuration of a non-contact power feeding apparatus.
  • FIG. 2 is a schematic plan view showing a configuration example of the ground side coil unit according to the embodiment of the present invention.
  • FIG. 3 is an enlarged perspective view of a main part showing a groove formed in the coil cover.
  • 4A is a cross-sectional view taken along line AA in FIG. 4B is a cross-sectional view taken along line BB in FIG. 4C is a cross-sectional view taken along the line CC of FIG. 4D is a cross-sectional view taken along line DD of FIG. 4E is a cross-sectional view taken along the line EE of FIG.
  • FIG. 5 is a schematic plan view showing a configuration example of the ground side coil unit according to the embodiment of the present invention.
  • 6A is a cross-sectional view taken along line AA in FIG. 6B is a cross-sectional view taken along line BB in FIG.
  • FIG. 7 is a schematic plan view showing a configuration example of the ground side coil unit according to the embodiment of the present invention.
  • 8A is a cross-sectional view taken along line AA in FIG. 8B is a cross-sectional view taken along line BB in FIG.
  • the non-contact power feeding device includes a power feeding device 100 that is a ground-side unit and a power receiving device 200 that is a vehicle-side unit.
  • the non-contact power supply device supplies power to the power receiving device 200 mounted on the vehicle 10 such as an electric vehicle or a hybrid vehicle from the power supply device 100 arranged in a power supply stand or the like, and the battery 27 mounted on the vehicle 10. To charge.
  • the power feeding apparatus 100 includes a power transmission coil 12 (ground side coil unit) arranged in a parking space near the power feeding stand.
  • the power receiving device 200 includes a power receiving coil 22 (power receiving coil unit) installed on the bottom surface of the vehicle 10.
  • the power receiving coil 22 is disposed so as to face the power transmitting coil 12 when the vehicle 10 stops at a predetermined position (power feedable position) in the parking space.
  • the power transmission coil 12 is constituted by a primary coil made of a conductive wire, and transmits power to the power reception coil 22.
  • the power receiving coil 22 is configured by a secondary coil that is also made of a conductive wire, and receives power from the power transmitting coil 12. Due to the electromagnetic induction action between the two coils, electric power can be supplied from the power transmission coil 12 to the power reception coil 22 in a non-contact manner.
  • the power feeding apparatus 100 includes a power control unit 11, a power transmission coil 12, a wireless communication unit 13, and a control unit 14.
  • the power control unit 11 is a circuit for converting AC power transmitted from the AC power source 110 into high-frequency AC power and transmitting it to the power transmission coil 12.
  • the power control unit 11 includes a rectification unit 111, a PFC circuit 112, a DC power source 114, and an inverter 113.
  • the rectifier 111 is a circuit that is electrically connected to the AC power supply 110 and rectifies AC power output from the AC power supply 110.
  • the PFC circuit 112 is a circuit (Power Factor Correction) for improving the power factor by shaping the waveform output from the rectifying unit 111, and is connected between the rectifying unit 111 and the inverter 113.
  • the inverter 113 includes a PWM control circuit composed of a switching element such as an IGBT, converts DC power into AC power based on the switching control signal, and supplies the power to the power transmission coil 12.
  • the DC power source 114 outputs a DC voltage when the power transmission coil 12 is weakly excited.
  • the wireless communication unit 13 performs bidirectional communication with the wireless communication unit 23 provided in the vehicle 10.
  • the control unit 14 controls the entire power supply apparatus 100, and includes an inverter control unit 141, a PFC control unit 142, and a sequence control unit 143.
  • the control part 14 performs the determination process of a parking position, when the vehicle 10 parks in a parking space.
  • the PFC control unit 142 generates an excitation power command
  • the inverter control unit 141 controls the inverter 113 by generating an excitation power frequency command and duty.
  • the control unit 14 transmits power for determining the parking position from the power transmission coil 12 to the power reception coil 22.
  • the control unit 14 transmits electric power for determining the parking position by making the power transmission coil 12 weakly excited or weakly excited (both are weaker than those during normal charging).
  • the sequence control unit 143 exchanges sequence information with the power receiving device 200 via the wireless communication unit 13.
  • the power receiving device 200 includes a power receiving coil 22, a wireless communication unit 23, a charging control unit 24, a rectifying unit 25, a relay switch 26 (relay circuit), a battery 27, an inverter 28, a motor 29, And a notification unit 30.
  • the wireless communication unit 23 performs bidirectional communication with the wireless communication unit 13 provided in the power supply apparatus 100.
  • the charging control unit 24 is a controller for controlling the charging of the battery 27.
  • the charging control unit 24 performs a parking position determination process.
  • the charging control unit 24 monitors the power received by the power receiving coil 22.
  • the charge control unit 24 detects the position of the power receiving coil 22 based on the voltage received by the power receiving coil 22 when the power transmitting coil 12 is excited.
  • the charging control unit 24 controls the wireless communication unit 23, the notification unit 30, the relay switch 26, and the like, and sends a signal indicating that charging is started via the wireless communication unit 23 to the control unit 14 of the power supply apparatus 100. Send to.
  • the rectifying unit 25 is connected to the power receiving coil 22, rectifies the AC power received by the power receiving coil 22 into a direct current, and outputs the power to the battery 27 or the inverter 28.
  • the relay switch 26 is turned on and off under the control of the charging control unit 24. Further, when the relay switch 26 is off, the battery 27 and the rectifying unit 25 are electrically disconnected.
  • the battery 27 is configured by connecting a plurality of secondary batteries, and serves as a power source for the vehicle 10.
  • the inverter 28 includes a PWM control circuit composed of a switching element such as an IGBT, converts DC power output from the battery 27 into AC power based on the switching control signal, and supplies the AC power to the motor 29.
  • a PWM control circuit composed of a switching element such as an IGBT, converts DC power output from the battery 27 into AC power based on the switching control signal, and supplies the AC power to the motor 29.
  • the motor 29 is constituted by, for example, a three-phase AC motor and serves as a drive source for driving the vehicle 10.
  • the notification unit 30 is configured by a warning lamp, a display of a navigation device, a speaker, or the like, and outputs light, an image, a sound, or the like to the user based on the control of the charging control unit 24.
  • ground side coil unit 12A (Configuration example of ground side coil unit) The ground side coil unit 12A will be described with reference to FIGS.
  • the ground side coil unit 12A shown in FIG. 2 is arranged on the ground and transmits electric power in a non-contact manner with a power receiving coil 22 (power receiving coil unit) (see FIG. 1) disposed on a vehicle.
  • a power receiving coil 22 power receiving coil unit
  • the ground side coil unit 12 ⁇ / b> A includes a base plate 31 (see FIG. 4), a coil 32 (see FIG. 2) disposed on the base plate 31, and a coil cover that covers the coil 32 from above. 33.
  • the base plate 31 is made of a metal material such as aluminum, and is fastened to the ground by a fastening member such as an anchor bolt.
  • the coil 32 includes a winding 34.
  • the winding 34 of the coil 32 is made of a conductive wire, and is arranged in a state of being wound in a rectangular spiral shape in plan view (see FIG. 2).
  • the material of the coil cover 33 can be processed by injection molding, and it is preferable to use a material having weather resistance.
  • the coil cover 33 is made of, for example, a synthetic resin material such as PPS (polyphenylene sulfide), PBT (polybutylene terephthalate), PA (polyamide), or PP (polypropylene).
  • the outer surface of the coil cover 33 is preferably coated with a coating material such as a photocatalyst.
  • a coating material such as a photocatalyst
  • a plurality of grooves 35 are formed on the upper surface of the coil cover 33, and the grooves 35 extend in a direction having a predetermined angle with respect to a direction orthogonal to the winding 34 in a plan view.
  • the groove 35 is inclined at a predetermined angle ⁇ 1 and extends obliquely (see FIG. 2). That is, the groove 35 extends in a direction having a predetermined angle ⁇ 1 with respect to the direction of the magnetic flux generated by the coil 32 in plan view.
  • the predetermined angle ⁇ 1 is preferably an angle between 45 ° and 135 °.
  • the groove 35 has a bottom surface 35a and a pair of side wall surfaces 35b extending upward from both sides of the bottom surface 35a (see FIG. 3).
  • the bottom surface 35a of the groove 35 is inclined downward at a predetermined angle ⁇ 0 from the center side to the outer side of the coil cover 33 (see FIG. 4A).
  • the predetermined angle ⁇ 0 is, for example, about 5 °. Since the bottom surface 35a of the groove 35 is inclined downward from the center side toward the outer side, deposits such as dust, mud and dust can be effectively removed from the groove 35 by rainwater or the like. It can suppress that a kimono accumulates in the groove
  • a part of the bottom surface 35a of the groove 35 is formed by a cycloid curve (see FIGS. 3 and 4).
  • the maximum depth Dmax (see FIG. 4C) of the groove 35 formed by the cycloid curve is, for example, about 5 mm. Since a part of the bottom surface 35a of the groove 35 is formed by a cycloid curve, the deposit can be more effectively removed from the groove 35, and the deposit can be prevented from accumulating in the groove 35.
  • a tapered crest 36 is provided between the grooves 35 without providing a flat surface (see FIGS. 3 and 4).
  • the top (tip) of the mountain 36 has a needle shape (pointed shape).
  • the top of the mountain 36 is not limited to a needle shape, and may be a dome shape (rounded shape), for example.
  • the gap G between the grooves 35 is set to a predetermined length.
  • the predetermined length is preferably greater than or equal to the length of foreign matter that cannot be detected by foreign matter detection (Foreign Object Detection), and is, for example, about 20 mm to 30 mm.
  • the ground side coil unit 12A includes a coil 32 constituted by the winding 34 and a coil cover 33 that covers the coil 32 from above.
  • a plurality of grooves 35 are formed on the upper surface of the coil cover 33, and the grooves 35 extend in a direction having a predetermined angle with respect to a direction orthogonal to the winding 34 in a plan view.
  • the ground side coil unit 12A it is possible to prevent foreign matter from being placed on the upper surface of the coil cover 33 along the direction orthogonal to the winding 34, and the upper surface of the coil cover 33. It becomes possible to suppress the heating of the foreign matter on the top.
  • the temperature rise is reduced by 35% when the foreign matter is inclined at 45 ° with respect to the magnetic flux direction, compared to the case where the foreign matter is placed parallel to the magnetic flux direction.
  • the temperature rise was reduced by 90%.
  • the temperature restriction on the coil 32 is the same, when the foreign object is inclined at an angle of 45 ° or more and 135 ° or less with respect to the magnetic flux direction as compared with the case where the foreign material is placed parallel to the magnetic flux direction, the coil The magnetic flux density of the magnetic flux generated by 32 can be improved.
  • the coil current of the coil 32 can also be improved, it becomes possible to improve the output of the coil 32 that is in a proportional relationship with the coil current of the coil 32.
  • At least a part of the bottom surface 35a of the groove 35 is formed by a cycloid curve.
  • the deposit By forming a part of the bottom surface 35a of the groove 35 by the cycloid curve, the deposit can be more effectively removed from the groove 35, and the deposit can be prevented from accumulating in the groove 35.
  • the ground side coil unit 12B is demonstrated with reference to FIG.5 and FIG.6.
  • the same components as those of the ground side coil unit 12A shown in FIGS. 2 to 4 are denoted by the same reference numerals, detailed description thereof is omitted, and only different portions will be described.
  • a second groove 45 intersecting with the groove 35 is formed on the upper surface of the coil cover 33, and the second groove 45 is inclined at a predetermined angle ⁇ 2 with respect to a direction orthogonal to the winding 34 in plan view. (See FIG. 5).
  • the second groove 45 extends obliquely at a predetermined angle ⁇ 2 with respect to the direction of the magnetic flux generated by the coil 32 in plan view.
  • the predetermined angle ⁇ 2 is preferably an angle between 45 ° and 135 °.
  • the upper surface of the coil cover 33 is further provided with a second groove 45 oblique to the direction opposite to the groove 35.
  • foreign matter metal foreign matter
  • the upper surface of the coil cover 33 is further provided with a second groove 45 oblique to the direction opposite to the groove 35.
  • the ground side coil unit 12B according to the present embodiment, foreign matter can be prevented from being placed on the upper surface of the coil cover 33 along the direction orthogonal to the winding 34, and the upper surface of the coil cover 33 can be prevented. It becomes possible to suppress the heating of the foreign matter on the top.
  • ground side coil unit 12C will be described with reference to FIGS.
  • the same components as those of the ground side coil unit 12B shown in FIGS. 5 and 6 are denoted by the same reference numerals, detailed description thereof is omitted, and only characteristic portions will be described.
  • points where the protrusions 46 are formed on the upper surface of the coil cover 33 of the ground side coil unit 12 ⁇ / b> C are indicated by point hatching.
  • a plurality of protrusions 46 are formed on the upper surface of the coil cover 33, and the groove 35 and the second groove 45 are formed between the protrusions 46.
  • the protrusion 46 is formed in a conical shape.
  • the height H (see FIG. 8B) of the protrusion 46 is, for example, about 5 mm.
  • the base length (base diameter) L of the conical protrusion 46 is set to a predetermined length.
  • This predetermined length (base length L) is preferably about the same as the length of a foreign object that cannot be detected by foreign object detection (Foreign Object Detection), for example, about 20 mm to 30 mm.
  • the top (tip) of the protrusion 46 has a needle shape (pointed shape).
  • the top of the protrusion 46 is not limited to a needle shape, and may be, for example, a dome shape (rounded shape).
  • the groove 35 and the second groove 45 are formed by the plurality of protrusions 46 on the upper surface of the coil cover 33. By doing so, foreign matter (metal foreign matter) such as nails, wires and screws is not parallel to the direction orthogonal to the winding 34 (the direction of the magnetic flux generated by the coil 32), and the direction of the foreign matter is grooved. 35 or the direction along the second groove 45 can be changed.
  • the ground side coil unit 12 ⁇ / b> C it is possible to prevent foreign matter from being placed on the upper surface of the coil cover 33 along the direction orthogonal to the winding 34, and the upper surface of the coil cover 33. It becomes possible to suppress the heating of the foreign matter on the top.
  • Ground side coil unit (power transmission coil) 22 Receiving coil unit (receiving coil) 32 Coil 33 Coil cover 34 Winding 35 Groove 45 Second groove 46 Projection

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

A ground-side coil unit (12), which is disposed on the ground, for contactlessly transmitting electrical power to a power reception coil unit (22) disposed on a vehicle. The ground-side coil unit (12) is provided with a coil (32) comprising a winding (34), and a coil cover (33) for covering the coil (32) from above. A plurality of grooves (35) are formed on the upper surface of the coil cover (33). The grooves (35) extend in a direction at a prescribed angle relative to a direction perpendicular to the winding (34), in plan view.

Description

地上側コイルユニットGround side coil unit
　本発明は、地上側コイルユニットに関する。 The present invention relates to a ground side coil unit.
　従来から、車両に配置される受電コイルユニットとの間で非接触で電力を伝送する、地上に配置される地上側コイルユニットが知られている（特許文献１参照）。 Conventionally, a ground-side coil unit disposed on the ground that transmits power in a non-contact manner with a power receiving coil unit disposed in a vehicle is known (see Patent Document 1).
　特許文献１には、非接触で第１コイルへ送電又は第１コイルから受電するための第２コイルを備えるコイル装置用の異物検出装置が記載されている。この異物検出装置は、第１コイルと第２コイルとの間に位置する異物検出コイルと、異物検出コイルの上部を覆うカバーと、を備える。カバーの上面は、第２コイルのコイル面に対して傾いた少なくとも１つの傾斜面を含み、傾斜面は、異物検出コイルの検出感度が相対的に低い低感度領域から、異物検出コイルの検出感度が相対的に高い高感度領域へ向かって下方に傾斜している。 Patent Document 1 describes a foreign object detection device for a coil device including a second coil for transmitting power to or receiving power from the first coil in a non-contact manner. The foreign object detection device includes a foreign object detection coil positioned between the first coil and the second coil, and a cover that covers an upper portion of the foreign object detection coil. The upper surface of the cover includes at least one inclined surface inclined with respect to the coil surface of the second coil, and the inclined surface detects the detection sensitivity of the foreign matter detection coil from the low sensitivity region where the detection sensitivity of the foreign matter detection coil is relatively low. Is inclined downward toward a relatively high sensitive region.
特開２０１６－１７１６８７号公報Japanese Unexamined Patent Publication No. 2016-171687
　地上側コイルユニットは、一般的に、巻線によって構成されるコイルと、コイルを上方から覆うコイルカバーとを有する。コイルカバーの上面に、異物が巻線と直交する方向に沿って置かれた場合には、コイルカバーの上面上の異物が加熱される可能性がある。 The ground side coil unit generally has a coil constituted by windings and a coil cover that covers the coil from above. If foreign matter is placed on the upper surface of the coil cover along a direction orthogonal to the winding, the foreign matter on the upper surface of the coil cover may be heated.
　そこで、本発明は、コイルカバーの上面上の異物の加熱を抑制することができる地上側コイルユニットを提供することを目的とする。 Therefore, an object of the present invention is to provide a ground side coil unit capable of suppressing the heating of foreign matter on the upper surface of the coil cover.
　本発明に係る地上側コイルユニットは、コイルを上方から覆うコイルカバーを備える。コイルカバーの上面に、複数の溝が形成され、溝は、平面視において、コイルの巻線と直交する方向に対して所定の角度を持つ方向に延設される。 The ground side coil unit according to the present invention includes a coil cover that covers the coil from above. A plurality of grooves are formed on the upper surface of the coil cover, and the grooves extend in a direction having a predetermined angle with respect to a direction orthogonal to the coil winding in plan view.
　本発明によれば、コイルカバーの上面上の異物の加熱を抑制することができる地上側コイルユニットを提供することができる。 According to the present invention, it is possible to provide a ground side coil unit capable of suppressing the heating of foreign matter on the upper surface of the coil cover.
図１は、非接触給電装置の全体構成例を示す図である。FIG. 1 is a diagram illustrating an example of the overall configuration of a non-contact power feeding apparatus. 図２は、本発明の実施形態に係る地上側コイルユニットの構成例を示す概略的な平面図である。FIG. 2 is a schematic plan view showing a configuration example of the ground side coil unit according to the embodiment of the present invention. 図３は、コイルカバーに形成された溝を示す要部拡大斜視図である。FIG. 3 is an enlarged perspective view of a main part showing a groove formed in the coil cover. 図４Ａは、図２のＡ－Ａ線による断面図である。4A is a cross-sectional view taken along line AA in FIG. 図４Ｂは、図２のＢ－Ｂ線による断面図である。4B is a cross-sectional view taken along line BB in FIG. 図４Ｃは、図２のＣ－Ｃ線による断面図である。4C is a cross-sectional view taken along the line CC of FIG. 図４Ｄは、図２のＤ－Ｄ線による断面図である。4D is a cross-sectional view taken along line DD of FIG. 図４Ｅは、図２のＥ－Ｅ線による断面図である。4E is a cross-sectional view taken along the line EE of FIG. 図５は、本発明の実施形態に係る地上側コイルユニットの構成例を示す概略的な平面図である。FIG. 5 is a schematic plan view showing a configuration example of the ground side coil unit according to the embodiment of the present invention. 図６Ａは、図５のＡ－Ａ線による断面図である。6A is a cross-sectional view taken along line AA in FIG. 図６Ｂは、図５のＢ－Ｂ線による断面図である。6B is a cross-sectional view taken along line BB in FIG. 図７は、本発明の実施形態に係る地上側コイルユニットの構成例を示す概略的な平面図である。FIG. 7 is a schematic plan view showing a configuration example of the ground side coil unit according to the embodiment of the present invention. 図８Ａは、図７のＡ－Ａ線による断面図である。8A is a cross-sectional view taken along line AA in FIG. 図８Ｂは、図７のＢ－Ｂ線による断面図である。8B is a cross-sectional view taken along line BB in FIG.
　以下、本発明の実施形態を図面とともに詳述する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
（非接触給電装置の全体構成例）
　図１を参照して、非接触給電装置の全体構成例を説明する。図１に示すように、非接触給電装置は、地上側ユニットである給電装置１００と、車両側ユニットである受電装置２００と、を備えている。非接触給電装置は、給電スタンド等に配置された給電装置１００から電気自動車やハイブリッド車等の車両１０に搭載された受電装置２００に非接触で電力を供給し、車両１０に搭載されたバッテリ２７を充電する。 (Example of overall configuration of non-contact power supply device)
With reference to FIG. 1, the example of whole structure of a non-contact electric power feeder is demonstrated. As illustrated in FIG. 1, the non-contact power feeding device includes a power feeding device 100 that is a ground-side unit and a power receiving device 200 that is a vehicle-side unit. The non-contact power supply device supplies power to the power receiving device 200 mounted on the vehicle 10 such as an electric vehicle or a hybrid vehicle from the power supply device 100 arranged in a power supply stand or the like, and the battery 27 mounted on the vehicle 10. To charge.
　給電装置１００は、給電スタンド近傍の駐車スペースに配置された送電コイル１２（地上側コイルユニット）を備えている。一方、受電装置２００は、車両１０の底面に設置された受電コイル２２（受電コイルユニット）を備えている。受電コイル２２は、車両１０が駐車スペースの所定位置（給電可能位置）に停車したときに送電コイル１２に対向するように配置されている。 The power feeding apparatus 100 includes a power transmission coil 12 (ground side coil unit) arranged in a parking space near the power feeding stand. On the other hand, the power receiving device 200 includes a power receiving coil 22 (power receiving coil unit) installed on the bottom surface of the vehicle 10. The power receiving coil 22 is disposed so as to face the power transmitting coil 12 when the vehicle 10 stops at a predetermined position (power feedable position) in the parking space.
　送電コイル１２は、導電線からなる一次コイルによって構成され、受電コイル２２に電力を送電する。また、受電コイル２２は、同じく導電線からなる二次コイルによって構成され、送電コイル１２からの電力を受電する。両コイル間における電磁誘導作用により、送電コイル１２から受電コイル２２へ非接触で電力を供給することが可能となる。 The power transmission coil 12 is constituted by a primary coil made of a conductive wire, and transmits power to the power reception coil 22. In addition, the power receiving coil 22 is configured by a secondary coil that is also made of a conductive wire, and receives power from the power transmitting coil 12. Due to the electromagnetic induction action between the two coils, electric power can be supplied from the power transmission coil 12 to the power reception coil 22 in a non-contact manner.
　給電装置１００は、電力制御部１１と、送電コイル１２と、無線通信部１３と、制御部１４と、を備えている。 The power feeding apparatus 100 includes a power control unit 11, a power transmission coil 12, a wireless communication unit 13, and a control unit 14.
　電力制御部１１は、交流電源１１０から送電される交流電力を高周波の交流電力に変換して送電コイル１２に送電するための回路である。電力制御部１１は、整流部１１１と、ＰＦＣ回路１１２と、ＤＣ電源１１４と、インバータ１１３とを備えている。 The power control unit 11 is a circuit for converting AC power transmitted from the AC power source 110 into high-frequency AC power and transmitting it to the power transmission coil 12. The power control unit 11 includes a rectification unit 111, a PFC circuit 112, a DC power source 114, and an inverter 113.
　整流部１１１は、交流電源１１０に電気的に接続され、交流電源１１０から出力される交流電力を整流する回路である。ＰＦＣ回路１１２は、整流部１１１から出力される波形を整形することで力率を改善するための回路（Ｐｏｗｅｒ　Ｆａｃｔｏｒ　Ｃｏｒｒｅｃｔｉｏｎ）であり、整流部１１１とインバータ１１３との間に接続されている。 The rectifier 111 is a circuit that is electrically connected to the AC power supply 110 and rectifies AC power output from the AC power supply 110. The PFC circuit 112 is a circuit (Power Factor Correction) for improving the power factor by shaping the waveform output from the rectifying unit 111, and is connected between the rectifying unit 111 and the inverter 113.
　インバータ１１３は、ＩＧＢＴ等のスイッチング素子で構成されたＰＷＭ制御回路を備え、スイッチング制御信号に基づいて直流電力を交流電力に変換して送電コイル１２に電力を供給する。ＤＣ電源１１４は、送電コイル１２を微弱励磁とする際の直流電圧を出力する。 The inverter 113 includes a PWM control circuit composed of a switching element such as an IGBT, converts DC power into AC power based on the switching control signal, and supplies the power to the power transmission coil 12. The DC power source 114 outputs a DC voltage when the power transmission coil 12 is weakly excited.
　無線通信部１３は、車両１０に設けられた無線通信部２３と双方向の通信を行う。 The wireless communication unit 13 performs bidirectional communication with the wireless communication unit 23 provided in the vehicle 10.
　制御部１４は、給電装置１００全体を制御するものであり、インバータ制御部１４１と、ＰＦＣ制御部１４２と、シーケンス制御部１４３とを備えている。制御部１４は、車両１０が駐車スペースに駐車するときに、駐車位置の判定処理を実行する。この際、ＰＦＣ制御部１４２は励磁電力指令を生成し、インバータ制御部１４１は励磁電力の周波数指令やデューティーを生成してインバータ１１３を制御する。これにより、制御部１４は、駐車位置を判定するための電力を送電コイル１２から受電コイル２２へ送電する。制御部１４は、駐車位置の判定処理を実施する際、送電コイル１２を微弱励磁、または弱励磁（いずれも、通常の充電時よりも弱い励磁）とすることにより駐車位置判定用の電力を送電する。また、シーケンス制御部１４３は、無線通信部１３を介して受電装置２００とシーケンス情報をやり取りする。 The control unit 14 controls the entire power supply apparatus 100, and includes an inverter control unit 141, a PFC control unit 142, and a sequence control unit 143. The control part 14 performs the determination process of a parking position, when the vehicle 10 parks in a parking space. At this time, the PFC control unit 142 generates an excitation power command, and the inverter control unit 141 controls the inverter 113 by generating an excitation power frequency command and duty. Accordingly, the control unit 14 transmits power for determining the parking position from the power transmission coil 12 to the power reception coil 22. When carrying out the parking position determination process, the control unit 14 transmits electric power for determining the parking position by making the power transmission coil 12 weakly excited or weakly excited (both are weaker than those during normal charging). To do. In addition, the sequence control unit 143 exchanges sequence information with the power receiving device 200 via the wireless communication unit 13.
　一方、受電装置２００は、受電コイル２２と、無線通信部２３と、充電制御部２４と、整流部２５と、リレースイッチ２６（リレー回路）と、バッテリ２７と、インバータ２８と、モータ２９と、通知部３０とを備えている。 On the other hand, the power receiving device 200 includes a power receiving coil 22, a wireless communication unit 23, a charging control unit 24, a rectifying unit 25, a relay switch 26 (relay circuit), a battery 27, an inverter 28, a motor 29, And a notification unit 30.
　無線通信部２３は、給電装置１００に設けられた無線通信部１３と双方向の通信を行う。 The wireless communication unit 23 performs bidirectional communication with the wireless communication unit 13 provided in the power supply apparatus 100.
　充電制御部２４は、バッテリ２７の充電を制御するためのコントローラである。充電制御部２４は、車両１０が駐車スペースに駐車するときに、駐車位置の判定処理を実行する。この際、充電制御部２４は、受電コイル２２で受電される電力を監視する。そして、充電制御部２４は、送電コイル１２が励磁されたときに受電コイル２２が受電した電圧に基づいて受電コイル２２の位置を検出する。また、充電制御部２４は、無線通信部２３、通知部３０、リレースイッチ２６等を制御しており、充電を開始する旨の信号を、無線通信部２３を介して給電装置１００の制御部１４に送信する。 The charging control unit 24 is a controller for controlling the charging of the battery 27. When the vehicle 10 parks in the parking space, the charging control unit 24 performs a parking position determination process. At this time, the charging control unit 24 monitors the power received by the power receiving coil 22. Then, the charge control unit 24 detects the position of the power receiving coil 22 based on the voltage received by the power receiving coil 22 when the power transmitting coil 12 is excited. In addition, the charging control unit 24 controls the wireless communication unit 23, the notification unit 30, the relay switch 26, and the like, and sends a signal indicating that charging is started via the wireless communication unit 23 to the control unit 14 of the power supply apparatus 100. Send to.
　整流部２５は、受電コイル２２に接続され、受電コイル２２が受電した交流電力を直流に整流して、バッテリ２７、またはインバータ２８に電力を出力する。 The rectifying unit 25 is connected to the power receiving coil 22, rectifies the AC power received by the power receiving coil 22 into a direct current, and outputs the power to the battery 27 or the inverter 28.
　リレースイッチ２６は、充電制御部２４の制御によってオンオフが切り換えられる。また、リレースイッチ２６がオフの場合、バッテリ２７と整流部２５とが電気的に切り離される。バッテリ２７は、複数の二次電池を接続して構成され、車両１０の電力源となる。 The relay switch 26 is turned on and off under the control of the charging control unit 24. Further, when the relay switch 26 is off, the battery 27 and the rectifying unit 25 are electrically disconnected. The battery 27 is configured by connecting a plurality of secondary batteries, and serves as a power source for the vehicle 10.
　インバータ２８は、ＩＧＢＴ等のスイッチング素子で構成されたＰＷＭ制御回路を備え、スイッチング制御信号に基づいてバッテリ２７から出力される直流電力を交流電力に変換してモータ２９に供給する。 The inverter 28 includes a PWM control circuit composed of a switching element such as an IGBT, converts DC power output from the battery 27 into AC power based on the switching control signal, and supplies the AC power to the motor 29.
　モータ２９は、例えば三相の交流電動機によって構成され、車両１０を駆動するための駆動源となる。 The motor 29 is constituted by, for example, a three-phase AC motor and serves as a drive source for driving the vehicle 10.
　通知部３０は、警告ランプ、ナビゲーション装置のディスプレイまたはスピーカ等によって構成され、充電制御部２４の制御に基づいて、ユーザに対して光、画像または音声等を出力する。 The notification unit 30 is configured by a warning lamp, a display of a navigation device, a speaker, or the like, and outputs light, an image, a sound, or the like to the user based on the control of the charging control unit 24.
　（地上側コイルユニットの構成例）
　図２から図４を参照して、地上側コイルユニット１２Ａについて説明する。 (Configuration example of ground side coil unit)
The ground side coil unit 12A will be described with reference to FIGS.
　図２に示す地上側コイルユニット１２Ａは、地上に配置され、車両に配置される受電コイル２２（受電コイルユニット）（図１参照）との間で非接触で電力を伝送するものである。 The ground side coil unit 12A shown in FIG. 2 is arranged on the ground and transmits electric power in a non-contact manner with a power receiving coil 22 (power receiving coil unit) (see FIG. 1) disposed on a vehicle.
　図２から図４に示すように、地上側コイルユニット１２Ａは、ベースプレート３１（図４参照）と、ベースプレート３１上に配置されるコイル３２（図２参照）と、コイル３２を上方から覆うコイルカバー３３とを有する。 As shown in FIGS. 2 to 4, the ground side coil unit 12 </ b> A includes a base plate 31 (see FIG. 4), a coil 32 (see FIG. 2) disposed on the base plate 31, and a coil cover that covers the coil 32 from above. 33.
　ベースプレート３１は、例えば、アルミニウム等の金属材料により構成され、アンカーボルト等の締結部材によって地面に締結される。 The base plate 31 is made of a metal material such as aluminum, and is fastened to the ground by a fastening member such as an anchor bolt.
　コイル３２は、巻線３４によって構成される。コイル３２の巻線３４は、導電線からなり、平面視において矩形渦巻き状に巻かれた状態で配置される（図２参照）。 The coil 32 includes a winding 34. The winding 34 of the coil 32 is made of a conductive wire, and is arranged in a state of being wound in a rectangular spiral shape in plan view (see FIG. 2).
　コイルカバー３３の材料は、射出成型による加工が可能であり、耐候性を有する材料を用いることが好ましい。コイルカバー３３は、例えば、ＰＰＳ（ポリフェニレンサルファイド）、ＰＢＴ（ポリブチレンテレフタレート）、ＰＡ（ポリアミド）、ＰＰ（ポリプロピレン）等の合成樹脂材料により構成される。 The material of the coil cover 33 can be processed by injection molding, and it is preferable to use a material having weather resistance. The coil cover 33 is made of, for example, a synthetic resin material such as PPS (polyphenylene sulfide), PBT (polybutylene terephthalate), PA (polyamide), or PP (polypropylene).
　コイルカバー３３の外表面は、光触媒等のコーティング材によりコーティングされることが好ましい。コイルカバー３３の外表面を光触媒等のコーティング材によりコーティングすることにより、光触媒作用によるセルフクリーニング効果をコイルカバー３３に付加することができる。 The outer surface of the coil cover 33 is preferably coated with a coating material such as a photocatalyst. By coating the outer surface of the coil cover 33 with a coating material such as a photocatalyst, a self-cleaning effect by the photocatalytic action can be added to the coil cover 33.
　コイルカバー３３の上面に、複数の溝３５が形成され、溝３５は、平面視において、巻線３４と直交する方向に対して所定の角度を持つ方向に延設される。溝３５は、例えば、所定角度θ１で傾斜して斜めに延びる（図２参照）。すなわち、溝３５は、平面視において、コイル３２により発生する磁束の磁束方向に対して所定角度θ１を持つ方向に延設される。この所定角度θ１は、４５°以上１３５°以下の角度であることが好ましい。コイルカバー３３の上面に、斜めの溝３５を設けることにより、釘、針金及びネジ等の異物（金属異物）が巻線３４と直交する方向（コイル３２により発生する磁束の磁束方向）と平行にはならず、異物の向きを溝３５に沿った方向に変更することができる。 A plurality of grooves 35 are formed on the upper surface of the coil cover 33, and the grooves 35 extend in a direction having a predetermined angle with respect to a direction orthogonal to the winding 34 in a plan view. For example, the groove 35 is inclined at a predetermined angle θ1 and extends obliquely (see FIG. 2). That is, the groove 35 extends in a direction having a predetermined angle θ1 with respect to the direction of the magnetic flux generated by the coil 32 in plan view. The predetermined angle θ1 is preferably an angle between 45 ° and 135 °. By providing an oblique groove 35 on the upper surface of the coil cover 33, foreign matter (metal foreign matter) such as nails, wires and screws is parallel to the direction perpendicular to the winding 34 (the magnetic flux direction of the magnetic flux generated by the coil 32). In other words, the direction of the foreign matter can be changed in the direction along the groove 35.
　溝３５は、底面３５ａと、底面３５ａの両側から上方に延びる一対の側壁面３５ｂとを有する（図３参照）。 The groove 35 has a bottom surface 35a and a pair of side wall surfaces 35b extending upward from both sides of the bottom surface 35a (see FIG. 3).
　溝３５の底面３５ａは、コイルカバー３３の中央側から外方側へ向かって下方に所定角度θ０で傾斜している（図４Ａ参照）。この所定角度θ０は、例えば、５°程度である。溝３５の底面３５ａが中央側から外方側へ向かって下方に傾斜していることにより、雨水等によりゴミ、泥及び埃等の付着物を効果的に溝３５から除去することができ、付着物が溝３５に溜まることを抑制することができる。 The bottom surface 35a of the groove 35 is inclined downward at a predetermined angle θ0 from the center side to the outer side of the coil cover 33 (see FIG. 4A). The predetermined angle θ0 is, for example, about 5 °. Since the bottom surface 35a of the groove 35 is inclined downward from the center side toward the outer side, deposits such as dust, mud and dust can be effectively removed from the groove 35 by rainwater or the like. It can suppress that a kimono accumulates in the groove | channel 35. FIG.
　溝３５の底面３５ａは、一部がサイクロイド曲線によって形成される（図３及び図４参照）。サイクロイド曲線によって形成される溝３５の最大深さＤｍａｘ（図４Ｃ参照）は、例えば、５ｍｍ程度である。溝３５の底面３５ａの一部がサイクロイド曲線によって形成されることにより、付着物をより効果的に溝３５から除去することができ、付着物が溝３５に溜まることを抑制することができる。 A part of the bottom surface 35a of the groove 35 is formed by a cycloid curve (see FIGS. 3 and 4). The maximum depth Dmax (see FIG. 4C) of the groove 35 formed by the cycloid curve is, for example, about 5 mm. Since a part of the bottom surface 35a of the groove 35 is formed by a cycloid curve, the deposit can be more effectively removed from the groove 35, and the deposit can be prevented from accumulating in the groove 35.
　溝３５同士の間には、平坦な面を設けずに、先細り形状の山３６を設けている（図３及び図４参照）。図４Ａから図４Ｄに示されるように、山３６の頂上部（先端部）は、針状（尖った形状）とされている。しかしながら、山３６の頂上部は、針状には限定はされず、例えば、ドーム状（丸められた形状）とされていてもよい。溝３５同士の間に、先細り形状の山３６を設けることにより、異物が溝３５同士の間に置かれることを抑制することができる。 A tapered crest 36 is provided between the grooves 35 without providing a flat surface (see FIGS. 3 and 4). As shown in FIGS. 4A to 4D, the top (tip) of the mountain 36 has a needle shape (pointed shape). However, the top of the mountain 36 is not limited to a needle shape, and may be a dome shape (rounded shape), for example. By providing the tapered crest 36 between the grooves 35, it is possible to prevent foreign matter from being placed between the grooves 35.
　溝３５同士の間隔Ｇ（図２のＸ方向成分、Ｙ方向成分）は、所定長さに設定される。この所定長さ（間隔Ｇ）は、異物検知（Ｆｏｒｅｉｇｎ　Ｏｂｊｅｃｔ　Ｄｅｔｅｃｔｉｏｎ）により検知できない異物の長さ以上とすることが好ましく、例えば、２０ｍｍ～３０ｍｍ程度である。溝３５同士の間隔Ｇを前述のように設定することにより、異物検知により検知できない異物が山３６と山３６とに跨って置かれることを抑制することができる。 The gap G between the grooves 35 (X-direction component and Y-direction component in FIG. 2) is set to a predetermined length. The predetermined length (interval G) is preferably greater than or equal to the length of foreign matter that cannot be detected by foreign matter detection (Foreign Object Detection), and is, for example, about 20 mm to 30 mm. By setting the gap G between the grooves 35 as described above, it is possible to suppress the foreign matter that cannot be detected by the foreign matter detection from being placed across the mountain 36 and the mountain 36.
　以下に、本実施形態による作用効果を説明する。 Hereinafter, the function and effect of this embodiment will be described.
　（１）地上側コイルユニット１２Ａは、巻線３４によって構成されるコイル３２と、コイル３２を上方から覆うコイルカバー３３と、を備える。コイルカバー３３の上面に、複数の溝３５が形成され、溝３５は、平面視において、巻線３４と直交する方向に対して所定の角度を持つ方向に延設される。 (1) The ground side coil unit 12A includes a coil 32 constituted by the winding 34 and a coil cover 33 that covers the coil 32 from above. A plurality of grooves 35 are formed on the upper surface of the coil cover 33, and the grooves 35 extend in a direction having a predetermined angle with respect to a direction orthogonal to the winding 34 in a plan view.
　コイルカバー３３の上面に、斜めの溝３５を設けることにより、釘、針金及びネジ等の異物（金属異物）が巻線３４と直交する方向（コイル３２により発生する磁束の磁束方向）と平行にはならず、異物の向きを溝３５に沿った方向に変更することができる。 By providing an oblique groove 35 on the upper surface of the coil cover 33, foreign matter (metal foreign matter) such as nails, wires and screws is parallel to the direction perpendicular to the winding 34 (the magnetic flux direction of the magnetic flux generated by the coil 32). In other words, the direction of the foreign matter can be changed in the direction along the groove 35.
　したがって、本実施形態に係る地上側コイルユニット１２Ａによれば、コイルカバー３３の上面に、異物が巻線３４と直交する方向に沿って置かれることを抑制することができ、コイルカバー３３の上面上の異物の加熱を抑制することが可能になる。 Therefore, according to the ground side coil unit 12A according to the present embodiment, it is possible to prevent foreign matter from being placed on the upper surface of the coil cover 33 along the direction orthogonal to the winding 34, and the upper surface of the coil cover 33. It becomes possible to suppress the heating of the foreign matter on the top.
　金属異物の温度上昇のシミュレーションを行った結果、異物を磁束方向と平行に置いた場合と比較して、異物を磁束方向に対して４５°傾けて置いた場合は温度上昇が３５％低減し、異物を磁束方向に対して９０°傾けて置いた場合は温度上昇が９０％低減した。コイル３２に関する温度制限が同一であれば、異物を磁束方向と平行に置いた場合と比較して、異物を磁束方向に対して４５°以上１３５°以下の角度で傾けて置いた場合は、コイル３２により発生する磁束の磁束密度を向上させることができる。また、コイル３２のコイル電流も向上させることができるため、コイル３２のコイル電流と比例に近い関係にあるコイル３２の出力を向上させることが可能になる。 As a result of the simulation of the temperature rise of the metal foreign matter, the temperature rise is reduced by 35% when the foreign matter is inclined at 45 ° with respect to the magnetic flux direction, compared to the case where the foreign matter is placed parallel to the magnetic flux direction. When the foreign object was placed at an angle of 90 ° with respect to the magnetic flux direction, the temperature rise was reduced by 90%. If the temperature restriction on the coil 32 is the same, when the foreign object is inclined at an angle of 45 ° or more and 135 ° or less with respect to the magnetic flux direction as compared with the case where the foreign material is placed parallel to the magnetic flux direction, the coil The magnetic flux density of the magnetic flux generated by 32 can be improved. Moreover, since the coil current of the coil 32 can also be improved, it becomes possible to improve the output of the coil 32 that is in a proportional relationship with the coil current of the coil 32.
　（２）溝３５の底面３５ａは、コイルカバー３３の中央側から外方側へ向かって下方に傾斜している。 (2) The bottom surface 35a of the groove 35 is inclined downward from the center side of the coil cover 33 toward the outer side.
　溝３５の底面３５ａが中央側から外方側へ向かって下方に傾斜していることにより、雨水等によりゴミ、泥及び埃等の付着物を効果的に溝３５から除去することができ、付着物が溝３５に溜まることを抑制することができる。 Since the bottom surface 35a of the groove 35 is inclined downward from the center side toward the outer side, deposits such as dust, mud and dust can be effectively removed from the groove 35 by rainwater or the like. It can suppress that a kimono accumulates in the groove | channel 35. FIG.
　（３）溝３５の底面３５ａは、少なくとも一部がサイクロイド曲線によって形成される。 (3) At least a part of the bottom surface 35a of the groove 35 is formed by a cycloid curve.
　溝３５の底面３５ａの一部がサイクロイド曲線によって形成されることにより、付着物をより効果的に溝３５から除去することができ、付着物が溝３５に溜まることを抑制することができる。 By forming a part of the bottom surface 35a of the groove 35 by the cycloid curve, the deposit can be more effectively removed from the groove 35, and the deposit can be prevented from accumulating in the groove 35.
　（送電コイルの他の構成例）
　図５及び図６を参照して、地上側コイルユニット１２Ｂについて説明する。なお、図２から図４に示す地上側コイルユニット１２Ａと同一の構成要素については同一の符号を付して詳細な説明を省略し、相違する部分についてのみ説明する。 (Other configuration examples of power transmission coil)
The ground side coil unit 12B is demonstrated with reference to FIG.5 and FIG.6. The same components as those of the ground side coil unit 12A shown in FIGS. 2 to 4 are denoted by the same reference numerals, detailed description thereof is omitted, and only different portions will be described.
　コイルカバー３３の上面に、溝３５と交差する第２の溝４５が形成され、第２の溝４５は、平面視において、巻線３４と直交する方向に対して所定角度θ２で傾斜して斜めに延びる（図５参照）。すなわち、第２の溝４５は、平面視において、コイル３２により発生する磁束の磁束方向に対して所定角度θ２で傾斜して斜めに延びる。この所定角度θ２は、４５°以上１３５°以下の角度であることが好ましい。 A second groove 45 intersecting with the groove 35 is formed on the upper surface of the coil cover 33, and the second groove 45 is inclined at a predetermined angle θ2 with respect to a direction orthogonal to the winding 34 in plan view. (See FIG. 5). In other words, the second groove 45 extends obliquely at a predetermined angle θ2 with respect to the direction of the magnetic flux generated by the coil 32 in plan view. The predetermined angle θ2 is preferably an angle between 45 ° and 135 °.
　コイルカバー３３の上面に、溝３５とは逆方向に斜めの第２の溝４５がさらに設けられる。このようにすることにより、釘、針金及びネジ等の異物（金属異物）が巻線３４と直交する方向（コイル３２により発生する磁束の磁束方向）と平行にはならず、異物の向きを溝３５又は第２の溝４５に沿った方向に変更することができる。 The upper surface of the coil cover 33 is further provided with a second groove 45 oblique to the direction opposite to the groove 35. By doing so, foreign matter (metal foreign matter) such as nails, wires and screws is not parallel to the direction orthogonal to the winding 34 (the direction of the magnetic flux generated by the coil 32), and the direction of the foreign matter is grooved. 35 or the direction along the second groove 45 can be changed.
　したがって、本実施形態に係る地上側コイルユニット１２Ｂによれば、コイルカバー３３の上面に、異物が巻線３４と直交する方向に沿って置かれることを抑制することができ、コイルカバー３３の上面上の異物の加熱を抑制することが可能になる。 Therefore, according to the ground side coil unit 12B according to the present embodiment, foreign matter can be prevented from being placed on the upper surface of the coil cover 33 along the direction orthogonal to the winding 34, and the upper surface of the coil cover 33 can be prevented. It becomes possible to suppress the heating of the foreign matter on the top.
　次に、図７及び図８を参照して、地上側コイルユニット１２Ｃについて説明する。なお、図５及び図６に示す地上側コイルユニット１２Ｂと同一の構成要素については同一の符号を付して詳細な説明を省略し、特徴的な部分についてのみ説明する。 Next, the ground side coil unit 12C will be described with reference to FIGS. The same components as those of the ground side coil unit 12B shown in FIGS. 5 and 6 are denoted by the same reference numerals, detailed description thereof is omitted, and only characteristic portions will be described.
　なお、図７においては、図示する便宜上、地上側コイルユニット１２Ｃのコイルカバー３３の上面における突起４６が形成される箇所に点ハッチングを付している。 In FIG. 7, for convenience of illustration, points where the protrusions 46 are formed on the upper surface of the coil cover 33 of the ground side coil unit 12 </ b> C are indicated by point hatching.
　コイルカバー３３の上面に、複数の突起４６が形成され、溝３５及び第２の溝４５は、突起４６同士の間に形成されている。本実施形態では、突起４６は、円錐形状に形成されている。この突起４６の高さＨ（図８Ｂ参照）は、例えば、５ｍｍ程度である。 A plurality of protrusions 46 are formed on the upper surface of the coil cover 33, and the groove 35 and the second groove 45 are formed between the protrusions 46. In the present embodiment, the protrusion 46 is formed in a conical shape. The height H (see FIG. 8B) of the protrusion 46 is, for example, about 5 mm.
　円錐形状の突起４６の底辺長さ（底辺径）Ｌは、所定長さに設定される。この所定長さ（底辺長さＬ）は、異物検知（Ｆｏｒｅｉｇｎ　Ｏｂｊｅｃｔ　Ｄｅｔｅｃｔｉｏｎ）により検知できない異物の長さと同程度であることが好ましく、例えば、２０ｍｍ～３０ｍｍ程度である。突起４６の底辺長さＬを前述のように設定することにより、異物検知により検知できない異物が突起４６と突起４６とに跨って置かれることを抑制することができる。 The base length (base diameter) L of the conical protrusion 46 is set to a predetermined length. This predetermined length (base length L) is preferably about the same as the length of a foreign object that cannot be detected by foreign object detection (Foreign Object Detection), for example, about 20 mm to 30 mm. By setting the base length L of the protrusion 46 as described above, it is possible to suppress the foreign object that cannot be detected by the foreign object detection from being placed across the protrusion 46 and the protrusion 46.
　図８Ａから図８Ｂに示されるように、突起４６の頂上部（先端部）は、針状（尖った形状）とされている。しかしながら、突起４６の頂上部は、針状には限定はされず、例えば、ドーム状（丸められた形状）とされていてもよい。突起４６の頂上部（先端部）を針状又はドーム状とすることにより、異物が突起４６同士の間又は突起４６の上に置かれることを抑制することができる。 As shown in FIG. 8A to FIG. 8B, the top (tip) of the protrusion 46 has a needle shape (pointed shape). However, the top of the protrusion 46 is not limited to a needle shape, and may be, for example, a dome shape (rounded shape). By making the top part (tip part) of the protrusion 46 into a needle shape or a dome shape, it is possible to prevent foreign matter from being placed between the protrusions 46 or on the protrusion 46.
　コイルカバー３３の上面における複数の突起４６によって、溝３５及び第２の溝４５が形成される。このようにすることにより、釘、針金及びネジ等の異物（金属異物）が巻線３４と直交する方向（コイル３２により発生する磁束の磁束方向）と平行にはならず、異物の向きを溝３５又は第２の溝４５に沿った方向に変更することができる。 The groove 35 and the second groove 45 are formed by the plurality of protrusions 46 on the upper surface of the coil cover 33. By doing so, foreign matter (metal foreign matter) such as nails, wires and screws is not parallel to the direction orthogonal to the winding 34 (the direction of the magnetic flux generated by the coil 32), and the direction of the foreign matter is grooved. 35 or the direction along the second groove 45 can be changed.
　したがって、本実施形態に係る地上側コイルユニット１２Ｃによれば、コイルカバー３３の上面に、異物が巻線３４と直交する方向に沿って置かれることを抑制することができ、コイルカバー３３の上面上の異物の加熱を抑制することが可能になる。 Therefore, according to the ground side coil unit 12 </ b> C according to the present embodiment, it is possible to prevent foreign matter from being placed on the upper surface of the coil cover 33 along the direction orthogonal to the winding 34, and the upper surface of the coil cover 33. It becomes possible to suppress the heating of the foreign matter on the top.
　以上、実施例に沿って本発明の内容を説明したが、本発明はこれらの記載に限定されるものではなく、種々の変形及び改良が可能であることは、当業者には自明である。 As mentioned above, although the content of the present invention has been described according to the embodiments, the present invention is not limited to these descriptions, and it is obvious to those skilled in the art that various modifications and improvements are possible.
１２　地上側コイルユニット（送電コイル）
２２　受電コイルユニット（受電コイル）
３２　コイル
３３　コイルカバー
３４　巻線
３５　溝
４５　第２の溝
４６　突起 12 Ground side coil unit (power transmission coil)
22 Receiving coil unit (receiving coil)
32 Coil 33 Coil cover 34 Winding 35 Groove 45 Second groove 46 Projection

Claims (5)

  1. 　車両に配置される受電コイルユニットとの間で非接触で電力を伝送する、地上側に配置される地上側コイルユニットであって、
    　巻線によって構成されるコイルと、
    　前記コイルを上方から覆うコイルカバーと、を備え、
    　前記コイルカバーの上面に、複数の溝が形成され、
    　前記溝は、平面視において、前記巻線と直交する方向に対して所定の角度を持つ方向に延設されることを特徴とする地上側コイルユニット。     A ground-side coil unit disposed on the ground side that transmits power in a non-contact manner with a receiving coil unit disposed in a vehicle,
    A coil constituted by windings;
    A coil cover that covers the coil from above,
    A plurality of grooves are formed on the upper surface of the coil cover,
    The groove is extended in a direction having a predetermined angle with respect to a direction orthogonal to the winding in a plan view.
  2. 　前記溝の底面は、前記コイルカバーの中央側から外方側へ向かって下方に傾斜していることを特徴とする請求項１に記載の地上側コイルユニット。 The ground side coil unit according to claim 1, wherein the bottom surface of the groove is inclined downward from the center side of the coil cover toward the outer side.
  3. 　前記溝の底面は、少なくとも一部がサイクロイド曲線によって形成されることを特徴とする請求項１又は２に記載の地上側コイルユニット。 The ground-side coil unit according to claim 1 or 2, wherein at least a part of the bottom surface of the groove is formed by a cycloid curve.
  4. 　前記コイルカバーの上面に、前記溝と交差する第２の溝が形成され、
    　前記第２の溝は、平面視において、前記巻線と直交する方向に対して所定の角度を持つ方向に延設されることを特徴とする請求項１から３の何れか一項に記載の地上側コイルユニット。     A second groove intersecting the groove is formed on the upper surface of the coil cover;
    The said 2nd groove | channel is extended in the direction which has a predetermined angle with respect to the direction orthogonal to the said coil | winding in planar view, The Claim 1 characterized by the above-mentioned. Ground side coil unit.
  5. 　前記コイルカバーの上面に、複数の突起が形成され、
    　前記溝は、前記突起同士の間に形成されていることを特徴とする請求項１から３の何れか一項に記載の地上側コイルユニット。     A plurality of protrusions are formed on the upper surface of the coil cover,
    The ground side coil unit according to any one of claims 1 to 3, wherein the groove is formed between the protrusions.
PCT/JP2018/020292 2018-05-28 2018-05-28 Ground-side coil unit WO2019229790A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015164363A (en) * 2014-02-28 2015-09-10 矢崎総業株式会社 Power feeding unit and power feeding system
WO2016002619A1 (en) * 2014-06-30 2016-01-07 株式会社Ihi Foreign-material-removing device, ground equipment for contactless electricity-supplying system, and contactless electricity-supplying system
JP2016171687A (en) * 2015-03-13 2016-09-23 株式会社Ihi Foreign matter detection device and coil device
JP2018057194A (en) * 2016-09-30 2018-04-05 パナソニックＩｐマネジメント株式会社 Controller of non-contact power transmission system, power transmission unit, power reception unit and non-contact power transmission system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015164363A (en) * 2014-02-28 2015-09-10 矢崎総業株式会社 Power feeding unit and power feeding system
WO2016002619A1 (en) * 2014-06-30 2016-01-07 株式会社Ihi Foreign-material-removing device, ground equipment for contactless electricity-supplying system, and contactless electricity-supplying system
JP2016171687A (en) * 2015-03-13 2016-09-23 株式会社Ihi Foreign matter detection device and coil device
JP2018057194A (en) * 2016-09-30 2018-04-05 パナソニックＩｐマネジメント株式会社 Controller of non-contact power transmission system, power transmission unit, power reception unit and non-contact power transmission system

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