JP4712254B2 - Power receiving core and power supply system for moving body - Google Patents

Power receiving core and power supply system for moving body Download PDF

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JP4712254B2
JP4712254B2 JP2001300173A JP2001300173A JP4712254B2 JP 4712254 B2 JP4712254 B2 JP 4712254B2 JP 2001300173 A JP2001300173 A JP 2001300173A JP 2001300173 A JP2001300173 A JP 2001300173A JP 4712254 B2 JP4712254 B2 JP 4712254B2
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power receiving
receiving core
power
wall plate
opening groove
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JP2003109833A (en
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和史 大谷
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Itoki Corp
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Itoki Corp
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Description

【０００１】
【発明の属する技術分野】
この発明は、受電コアの構造及び、該受電コアを用いた受電部を有する移動体への給電システムに関するものであり、特に、倉庫等における物品の収納保管及び検索取出しを搬送車によって自動的に行う自動保管検索装置において、走行用の駆動電力を非接触で搬送車に供給する、搬送車への給電システムに関するものである。
【０００２】
【従来の技術】
倉庫等における物品の収納保管及び検索取出しを搬送車によって自動的に行う自動保管検索装置がある。このような自動保管検索装置において、走行用の駆動電力を搬送車に給電する方式として、非接触給電が行われている。
【０００３】
図１０は、従来の自動保管検索装置の構成を模式的に示す斜視図である。所望のストッカー１ａ，１ｂに物品２を収納するために、あるいは、所望のストッカー１ａ，１ｂから物品２を取り出すために、受電部１０５を備える搬送車４は、レール３ａ，３ｂ上を走行しながら物品２を搬送する。
【０００４】
図１１は、搬送車４の受電部１０５付近の構造をレール３ａとともに示す断面図である。搬送車４の車輪１０が、レール３ａの上面に接触している。受電部１０５は、二次側のコイル１１が巻装された、断面形状が略Ｅ字形の受電コア１０９を有している。受電コア１０９は、底壁板１０９ａと、側壁板１０９ｂ，１０９ｄと、内壁板１０９ｃとを有している。内壁板１０９ｃの高さは側壁板１０９ｂ，１０９ｄの高さにほぼ等しく、コイル１１は内壁板１０９ｃに巻装されている。また、内壁板１０９ｃの上端部には、側壁板１０９ｂ，１０９ｄに向かってそれぞれ突出した突出部１０９ｅ，１０９ｆが形成されている。側壁板１０９ｂの上端部と突出部１０９ｅとの間にはギャップＧ１０１が形成されており、側壁板１０９ｄの上端部と突出部１０９ｆとの間にはギャップＧ１０２が形成されている。図１１に示すように、ギャップＧ１０１とギャップＧ１０２とは、互いに離間しつつ同一直線上に形成されている。また、受電コア１０９は取付部材８上に取り付けられており、取付部材８は、搬送車４の本体部に固定されている。
【０００５】
一次側の給電線７ａ，７ｂは、取付部材６ａ，６ｂによって、レール３ａの底面にそれぞれ取り付けられている。実際には、複数の取付部材６ａ，６ｂがレール３ａに沿って等間隔に配設されている。取付部材６ａ，６ｂは、それぞれギャップＧ１０１，Ｇ１０２から受電コア１０９内に挿入されており、これにより、給電線７ａ，７ｂが受電コア１０９の内部空間Ａ１０１，Ａ１０２にそれぞれ配設されている。なお、内部空間Ａ１０１は、底壁板１０９ａ、側壁板１０９ｂ、及び内壁板１０９ｃによって規定される空間であり、内部空間Ａ１０２は、底壁板１０９ａ、側壁板１０９ｄ、及び内壁板１０９ｃによって規定される空間である。
【０００６】
【発明が解決しようとする課題】
図１２は、受電コア１０９を励磁させたときの磁束分布に関するシミュレーション結果を示す図である。図１２に示すように、従来の受電コア１０９では、ギャップＧ１０１，Ｇ１０２から外部への磁束の漏洩が大きい。そのため、従来の受電コア１０９によると、大きな磁束の漏洩によって受電部１０５の給電効率が低下するという問題があった。また、この漏洩磁束が受電コア１０９の周囲に与える影響も大きくなるため、鉄等の導電性磁性体を受電コア１０９に近い箇所に設置することが制約されるという問題もあった。
【０００７】
本発明はかかる問題を解決するために成されたものであり、外部への磁束の漏洩が抑制された受電コア、及び該受電コアを用いた受電部を有する移動体への給電システムを得ることを目的とするものである。
【０００８】
【課題を解決するための手段】
この発明のうち請求項１に記載の受電コアは、互いに対向する第１及び第２の開口側面と、第１の開口側面と第２の開口側面とを繋ぐ開口溝とを有する、中空柱状の外壁枠体と、開口溝が延在する方向に延在して形成され、かつ、開口溝に対向する部分の外壁枠体の内面から、頂面が開口溝に到達しないように開口溝に向かって形成された内壁板とを備え、開口溝は、外壁枠体の互いに対向する第１端面及び第２端面によって規定され、外壁枠体の第１端面と内壁板の頂面とによって規定される第１のギャップと、外壁枠体の第２端面と内壁板の頂面とによって規定される第２のギャップとが形成されていることを特徴とするものである。
【０００９】
また、この発明のうち請求項２に記載の受電コアは、請求項１に記載の受電コアであって、開口溝が延在する方向に延在して内壁板の頂面上に形成され、頂面よりも幅広の、磁化等方性の磁性部材をさらに備えることを特徴とするものである。
【００１０】
また、この発明のうち請求項３に記載の移動体への給電システムは、移動体が走行する軌道に沿って給電線を配設し、移動体が備える受電部に対して、給電線から非接触で電力を供給する、移動体への給電システムであって、給電線は、保持部材によって軌道に沿って保持された、第１及び第２の給電線を含み、受電部は、請求項１又は２に記載の受電コアを有し、保持部材が開口溝並びに第１及び第２のギャップから受電コア内に挿入されることにより、第１及び第２の給電線が受電コアの内部空間に配設されていることを特徴とするものである。
【００１１】
【発明の実施の形態】
実施の形態１．
図１は、本発明の実施の形態１に係る自動保管検索装置の構成を模式的に示す斜視図である。所望のストッカー１ａ，１ｂに物品２を収納するために、あるいは、所望のストッカー１ａ，１ｂから物品２を取り出すために、受電部５を備える搬送車４は、レール３ａ，３ｂ上を走行しながら物品２を搬送する。
【００１２】
図２は、本実施の形態１に係る自動保管検索装置に関して、搬送車４の受電部５付近の構造をレール３ａとともに示す断面図である。搬送車４の車輪１０が、レール３ａの上面に接触している。受電部５は、二次側のコイル１１が巻装された受電コア９を有している。受電コア９は取付部材８上に取り付けられており、取付部材８は、搬送車４の本体部に固定されている。
【００１３】
図３は、受電コア９の構造を取付部材８とともに示す斜視図である。図３を参照して、受電コア９は、互いに対向する第１及び第２の開口側面（ＹＺ平面内に存在する側面）と、第１の開口側面と第２の開口側面とを繋ぐ幅狭の開口溝５０とを有する、中空柱状の外壁枠体を備えている。外壁枠体は、底壁板９ａと、側壁板９ｂ，９ｄと、上壁板９ｅ，９ｆとを有している。側壁板９ｂは底壁板９ａに繋がり、上壁板９ｅは側壁板９ｂに繋がっている。また、側壁板９ｄは底壁板９ａに繋がり、上壁板９ｆは側壁板９ｄに繋がっている。開口溝５０は、互いに対向する上壁板９ｅの端面５１と上壁板９ｆの端面５２との間に規定されている。また、受電コア９は内壁板９ｃを備えており、内壁板９ｃは、開口溝５０が延在する方向（Ｘ方向）に延在して、かつ、開口溝５０に対向する部分の底壁板９ａの内面から、頂面５３が開口溝５０に到達しないように開口溝５０に向かって形成されている。内壁板９ｃの高さは側壁板９ｂ，９ｄの高さよりも低い。
【００１４】
かかる構成により、図２に示すように受電コア９には、上壁板９ｅの端面５１と内壁板９ｃの頂面５３とによって規定されるギャップＧ１と、上壁板９ｆの端面５２と内壁板９ｃの頂面５３とによって規定されるギャップＧ２とが形成されている。ギャップＧ１及びギャップＧ２は、内壁板９ｃの頂面５３を共通の一端として、略Ｖ字状に対向して形成されている。なお、図３には、中空四角柱状の外壁枠体を示したが、例えば中空円柱状の外壁枠体等であってもよい。
【００１５】
図２を参照して、コイル１１は内壁板９ｃに巻装されている。一次側の給電線７ａ，７ｂは保持部材６によって保持されており、保持部材６はレール３ａの底面に取り付けられている。実際には、複数の保持部材６がレール３ａに沿って等間隔に配設されている。保持部材６は、開口溝５０から受電コア９内に挿入された後、ギャップＧ１，Ｇ２の方向に枝分かれしており、これにより、給電線７ａ，７ｂが受電コア９の内部空間Ａ１，Ａ２にそれぞれ配設されている。なお、内部空間Ａ１は、底壁板９ａ、側壁板９ｂ、上壁板９ｅ、及び内壁板９ｃによって規定される空間であり、内部空間Ａ２は、底壁板９ａ、側壁板９ｄ、上壁板９ｆ、及び内壁板９ｃによって規定される空間である。
【００１６】
図４は、本実施の形態１に係る受電コア９の構造を示す断面図である。受電コア９は、厚みが数１０μｍ程度のアモルファスの薄膜９１〜９５が、図４に示すように複数（図４では図面の簡略化のため５層のみ示している）積層されて構成されている。上壁板９ｅ，９ｆの端面５１，５２部分において、上壁板９ｅ，９ｆの各底面には、薄膜９１〜９５がそれぞれ露出している。
【００１７】
図５は、本実施の形態１に係る受電コア９を励磁させたときの磁束分布に関するシミュレーション結果を示す図である。図５と図１２とを比較すると分かるように、本実施の形態１に係る受電コア９は、従来の受電コア１０９と比較して、ギャップＧ１，Ｇ２から外部への磁束の漏洩が抑制されている。その理由の一つは以下の通りである。図２を参照して、給電線７ａには紙面の手前から奥に向かって電流が流れ、給電線７ｂには紙面の奥から手前に向かって電流が流れているとする。すると、端面５１部分及び端面５２部分がＮ極となり、頂面５３部分がＳ極となる。ギャップＧ１に着目すると、ギャップＧ１の両端には一対のＮ極（端面５１）及びＳ極（頂面５３）が存在するのに加えて、磁束が漏れようとする方向に、もう一つのＮ極（端面５２）が存在する。従って、従来の受電コア１０９ではＮ極とＳ極とが引き合うだけだったのに対して、本実施の形態１に係る受電コア９では、Ｎ極（端面５１）とＳ極（頂面５３）とが引き合うことに加えて、もう一つのＮ極（端面５２）によって磁束の漏れを反発する作用が生じる。その結果、反発された磁束はＳ極へと戻るため、外部への磁束の漏洩が抑制されるのである。
【００１８】
このように本実施の形態１に係る受電コア９によれば、従来の受電コア１０９と比較して、ギャップＧ１，Ｇ２から外部への磁束の漏洩を抑制することができる。その結果、受電部５の給電効率が向上するため、同じ入力電力（一次側）に対して大きな出力電力（二次側）を得ることができる。また、漏洩磁束が受電コア９の周囲に与える影響を抑制できるため、受電コア９に近い箇所に鉄等の導電性磁性体を設置することが可能となり、設計の自由度を高めることができる。
【００１９】
図６は、受電コア９の形状の変形例を示す図である。図６に示すような形状の受電コアであっても、ギャップから外部への磁束の漏洩が抑制され、上記と同様の効果が得られる。
【００２０】
実施の形態２．
図７は、本発明の実施の形態２に係る自動保管検索装置に関して、搬送車４の受電部５付近の構造をレール３ａとともに示す断面図であり、図８は、本実施の形態２に係る受電コア９の構造を示す断面図である。内壁板９ｃの頂面５３上には、開口溝５０が延在する方向（Ｘ方向）に延在して、磁性体１２が形成されている。Ｙ方向に関する磁性体１２の幅は、Ｙ方向に関する内壁板９ｃの幅よりも広く、Ｚ方向から眺めた場合、上壁板９ｅ，９ｆと磁性体１２とは一部が重複する。また、磁性体１２は、フェライトの粉末を焼き固めて一体成形された、磁化等方性の磁性体である。本明細書において「磁化等方性」とは、成形された形状において磁気異方性が低く、どの方向へも比較的均等に磁化されやすい性質を意味する。本実施の形態２に係る受電部５のその他の構造は、上記実施の形態１に係る受電部５の構造と同様である。
【００２１】
図９は、本実施の形態２に係る受電コア９を励磁させたときの磁束分布に関するシミュレーション結果を示す図である。図５のシミュレーション結果に示されているように、上記実施の形態１に係る受電コア９では、内壁板９ｃの頂面５３付近で磁束が集中する傾向にあり、この部分が早く飽和するため、受電コア９の能力を最大限に活用できない可能性があった。これに対して、図９のシミュレーション結果に示されているように、本実施の形態２に係る受電コア９では、内壁板９ｃの頂面５３付近に集中していた磁束が、磁性体１２の幅方向（Ｙ方向）に均一に分散されている。
【００２２】
このように本実施の形態２に係る受電コア９によれば、内壁板９ｃの頂面５３上に幅広かつ磁化等方性の磁性体１２を設けたため、局所的に集中した磁束の飽和によって受電コア９の能力が抑制されることを回避することができる。
【００２３】
【発明の効果】
この発明のうち請求項１に係るものによれば、第１及び第２のギャップから受電コアの外部への磁束の漏洩を抑制することができる。
【００２４】
また、この発明のうち請求項２に係るものによれば、局所的に集中した磁束の飽和によって受電コアの能力が抑制されることを回避することができる。
【００２５】
また、この発明のうち請求項３に係るものによれば、受電部の給電効率が向上するため、同じ入力電力（一次側）に対して大きな出力電力（二次側）を得ることができる。また、漏洩磁束が受電コアの周囲に与える影響を抑制できるため、受電コアに近い箇所に鉄等の導電性磁性体を設置することが可能となり、設計の自由度を高めることができる。
【図面の簡単な説明】
【図１】 本発明の実施の形態１に係る自動保管検索装置の構成を模式的に示す斜視図である。
【図２】 本発明の実施の形態１に係る自動保管検索装置に関して、搬送車の受電部付近の構造をレールとともに示す断面図である。
【図３】 受電コアの構造を取付部材とともに示す斜視図である。
【図４】 本発明の実施の形態１に係る受電コアの構造を示す断面図である。
【図５】 本実施の形態１に係る受電コアを励磁させたときの磁束分布に関するシミュレーション結果を示す図である。
【図６】 受電コアの形状の変形例を示す図である。
【図７】 本発明の実施の形態２に係る自動保管検索装置に関して、搬送車の受電部付近の構造をレールとともに示す断面図である。
【図８】 本発明の実施の形態２に係る受電コアの構造を示す断面図である。
【図９】 本発明の実施の形態２に係る受電コアを励磁させたときの磁束分布に関するシミュレーション結果を示す図である。
【図１０】 従来の自動保管検索装置の構成を模式的に示す斜視図である。
【図１１】 従来の搬送車の受電部付近の構造をレールとともに示す断面図である。
【図１２】 従来の受電コアを励磁させたときの磁束分布に関するシミュレーション結果を示す図である。
【符号の説明】
３ａ，３ｂ レール
４ 搬送車
５ 受電部
６ 保持部材
７ａ，７ｂ 給電線
９ 受電コア
１２ 磁性体
５０ 開口溝[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a power receiving core and a power feeding system to a mobile body having a power receiving unit using the power receiving core, and in particular, storage and retrieval of articles in a warehouse or the like are automatically performed by a transport vehicle. The present invention relates to a power supply system for a transport vehicle that supplies driving power for traveling to the transport vehicle in a non-contact manner in an automatic storage search device to be performed.
[0002]
[Prior art]
There is an automatic storage retrieval device that automatically stores and retrieves articles in a warehouse or the like by a transport vehicle. In such an automatic storage / retrieval apparatus, non-contact power feeding is performed as a method of feeding driving power for traveling to a transport vehicle.
[0003]
FIG. 10 is a perspective view schematically showing a configuration of a conventional automatic storage / retrieval apparatus. In order to store the articles 2 in the desired stockers 1a and 1b, or to take out the articles 2 from the desired stockers 1a and 1b, the transport vehicle 4 including the power receiving unit 105 travels on the rails 3a and 3b. The article 2 is conveyed.
[0004]
FIG. 11 is a cross-sectional view showing the structure near the power receiving unit 105 of the transport vehicle 4 together with the rail 3a. The wheel 10 of the transport vehicle 4 is in contact with the upper surface of the rail 3a. The power receiving unit 105 includes a power receiving core 109 having a substantially E-shaped cross section around which the secondary coil 11 is wound. The power receiving core 109 includes a bottom wall plate 109a, side wall plates 109b and 109d, and an inner wall plate 109c. The height of the inner wall plate 109c is substantially equal to the height of the side wall plates 109b and 109d, and the coil 11 is wound around the inner wall plate 109c. In addition, projecting portions 109e and 109f projecting toward the side wall plates 109b and 109d are formed at the upper end portion of the inner wall plate 109c. A gap G101 is formed between the upper end portion of the side wall plate 109b and the protruding portion 109e, and a gap G102 is formed between the upper end portion of the side wall plate 109d and the protruding portion 109f. As shown in FIG. 11, the gap G101 and the gap G102 are formed on the same straight line while being separated from each other. The power receiving core 109 is mounted on the mounting member 8, and the mounting member 8 is fixed to the main body of the transport vehicle 4.
[0005]
The primary power supply lines 7a and 7b are attached to the bottom surface of the rail 3a by attachment members 6a and 6b, respectively. Actually, a plurality of mounting members 6a and 6b are arranged at equal intervals along the rail 3a. The attachment members 6a and 6b are inserted into the power receiving core 109 from the gaps G101 and G102, respectively, whereby the feeder lines 7a and 7b are disposed in the internal spaces A101 and A102 of the power receiving core 109, respectively. The internal space A101 is a space defined by the bottom wall plate 109a, the side wall plate 109b, and the inner wall plate 109c, and the internal space A102 is defined by the bottom wall plate 109a, the side wall plate 109d, and the inner wall plate 109c. It is space.
[0006]
[Problems to be solved by the invention]
FIG. 12 is a diagram illustrating a simulation result regarding the magnetic flux distribution when the power receiving core 109 is excited. As shown in FIG. 12, in the conventional power receiving core 109, leakage of magnetic flux from the gaps G101 and G102 to the outside is large. Therefore, according to the conventional power receiving core 109, there is a problem that the power feeding efficiency of the power receiving unit 105 is reduced due to leakage of a large magnetic flux. In addition, since the influence of the leakage magnetic flux on the periphery of the power receiving core 109 is increased, there is a problem that it is restricted to install a conductive magnetic material such as iron near the power receiving core 109.
[0007]
The present invention has been made to solve such a problem, and obtains a power receiving core in which leakage of magnetic flux to the outside is suppressed, and a power feeding system to a moving body having a power receiving unit using the power receiving core. It is intended.
[0008]
[Means for Solving the Problems]
According to a first aspect of the present invention, the power receiving core according to the first aspect has a hollow columnar shape having first and second opening side surfaces facing each other, and an opening groove connecting the first opening side surface and the second opening side surface. The outer wall frame is formed so as to extend in the direction in which the opening groove extends, and from the inner surface of the outer wall frame at a portion facing the opening groove, so that the top surface does not reach the opening groove. And the opening groove is defined by the first end surface and the second end surface facing each other of the outer wall frame, and is defined by the first end surface of the outer wall frame and the top surface of the inner wall plate. A first gap and a second gap defined by the second end face of the outer wall frame and the top face of the inner wall plate are formed.
[0009]
The power receiving core according to claim 2 of the present invention is the power receiving core according to claim 1, wherein the power receiving core is formed on the top surface of the inner wall plate extending in a direction in which the opening groove extends, A magnetic isotropic magnetic member wider than the top surface is further provided.
[0010]
According to a third aspect of the present invention, there is provided a power feeding system for a moving body according to a third aspect of the present invention, wherein a power feeding line is disposed along a trajectory along which the moving body travels, and the power receiving section provided in the moving body is not connected to the power receiving section. A power supply system for a moving body that supplies electric power by contact, wherein the power supply line includes first and second power supply lines held along a track by a holding member, and the power receiving unit includes: Alternatively, the power receiving core according to claim 2 is provided, and the holding member is inserted into the power receiving core through the opening groove and the first and second gaps, whereby the first and second feeders are placed in the internal space of the power receiving core. It is characterized by being arranged.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a perspective view schematically showing a configuration of an automatic storage search device according to Embodiment 1 of the present invention. In order to store the articles 2 in the desired stockers 1a and 1b, or to take out the articles 2 from the desired stockers 1a and 1b, the transport vehicle 4 including the power receiving unit 5 travels on the rails 3a and 3b. The article 2 is conveyed.
[0012]
FIG. 2 is a cross-sectional view showing the structure in the vicinity of the power receiving unit 5 of the transport vehicle 4 together with the rail 3a with respect to the automatic storage search device according to the first embodiment. The wheel 10 of the transport vehicle 4 is in contact with the upper surface of the rail 3a. The power receiving unit 5 includes a power receiving core 9 around which a secondary coil 11 is wound. The power receiving core 9 is mounted on the mounting member 8, and the mounting member 8 is fixed to the main body of the transport vehicle 4.
[0013]
FIG. 3 is a perspective view showing the structure of the power receiving core 9 together with the attachment member 8. Referring to FIG. 3, the power receiving core 9 has a narrow width connecting the first and second opening side surfaces (side surfaces existing in the YZ plane) facing each other, and the first opening side surface and the second opening side surface. And a hollow columnar outer wall frame having an open groove 50. The outer wall frame has a bottom wall plate 9a, side wall plates 9b and 9d, and upper wall plates 9e and 9f. The side wall plate 9b is connected to the bottom wall plate 9a, and the upper wall plate 9e is connected to the side wall plate 9b. The side wall plate 9d is connected to the bottom wall plate 9a, and the upper wall plate 9f is connected to the side wall plate 9d. The opening groove 50 is defined between the end surface 51 of the upper wall plate 9e and the end surface 52 of the upper wall plate 9f facing each other. The power receiving core 9 includes an inner wall plate 9c. The inner wall plate 9c extends in the direction (X direction) in which the opening groove 50 extends and is a bottom wall plate at a portion facing the opening groove 50. The top surface 53 is formed from the inner surface of 9 a toward the opening groove 50 so as not to reach the opening groove 50. The height of the inner wall plate 9c is lower than the height of the side wall plates 9b and 9d.
[0014]
2, the power receiving core 9 has a gap G1 defined by the end surface 51 of the upper wall plate 9e and the top surface 53 of the inner wall plate 9c, and the end surface 52 and inner wall plate of the upper wall plate 9f. A gap G2 defined by the top surface 53 of 9c is formed. The gap G1 and the gap G2 are formed to face each other in a substantially V shape with the top surface 53 of the inner wall plate 9c as one common end. In addition, although the hollow square column-shaped outer wall frame was shown in FIG. 3, a hollow cylindrical outer wall frame etc. may be sufficient, for example.
[0015]
Referring to FIG. 2, coil 11 is wound around inner wall plate 9c. The primary power supply lines 7a and 7b are held by a holding member 6, and the holding member 6 is attached to the bottom surface of the rail 3a. In practice, a plurality of holding members 6 are arranged at equal intervals along the rail 3a. The holding member 6 is inserted into the power receiving core 9 from the opening groove 50 and then branches in the direction of the gaps G1 and G2. As a result, the feeder lines 7a and 7b are connected to the internal spaces A1 and A2 of the power receiving core 9. Each is arranged. The internal space A1 is a space defined by the bottom wall plate 9a, the side wall plate 9b, the upper wall plate 9e, and the inner wall plate 9c, and the internal space A2 is the bottom wall plate 9a, the side wall plate 9d, and the upper wall plate. 9f and a space defined by the inner wall plate 9c.
[0016]
FIG. 4 is a cross-sectional view showing the structure of the power receiving core 9 according to the first embodiment. The power receiving core 9 is formed by laminating a plurality of amorphous thin films 91 to 95 having a thickness of about several tens of μm (only five layers are shown in FIG. 4 for simplification of the drawing) as shown in FIG. . The thin films 91 to 95 are exposed at the bottom surfaces of the upper wall plates 9e and 9f at the end surfaces 51 and 52 of the upper wall plates 9e and 9f, respectively.
[0017]
FIG. 5 is a diagram illustrating a simulation result regarding the magnetic flux distribution when the power receiving core 9 according to the first embodiment is excited. As can be seen from a comparison between FIG. 5 and FIG. 12, the power receiving core 9 according to the first embodiment has a reduced leakage of magnetic flux from the gaps G 1 and G 2 to the outside as compared with the conventional power receiving core 109. Yes. One of the reasons is as follows. Referring to FIG. 2, it is assumed that a current flows from the front side to the back side of the paper in the power supply line 7a, and a current flows from the back side of the paper to the front side in the power supply line 7b. Then, the end surface 51 portion and the end surface 52 portion become the N pole, and the top surface 53 portion becomes the S pole. Focusing on the gap G1, in addition to the presence of a pair of N poles (end face 51) and S pole (top face 53) at both ends of the gap G1, another N pole is provided in the direction in which the magnetic flux leaks. (End face 52) exists. Therefore, in the conventional power receiving core 109, only the N pole and the S pole attract each other, whereas in the power receiving core 9 according to the first embodiment, the N pole (end face 51) and the S pole (top face 53). In addition to attracting each other, another N pole (end face 52) acts to repel magnetic flux leakage. As a result, since the repelled magnetic flux returns to the S pole, leakage of the magnetic flux to the outside is suppressed.
[0018]
As described above, according to the power receiving core 9 according to the first embodiment, it is possible to suppress leakage of magnetic flux from the gaps G1 and G2 to the outside as compared with the conventional power receiving core 109. As a result, since the power feeding efficiency of the power receiving unit 5 is improved, a large output power (secondary side) can be obtained with respect to the same input power (primary side). Moreover, since the influence which leakage magnetic flux has on the circumference | surroundings of the receiving core 9 can be suppressed, it becomes possible to install electroconductive magnetic bodies, such as iron, in the location near the receiving core 9, and can raise the freedom degree of design.
[0019]
FIG. 6 is a diagram illustrating a modification of the shape of the power receiving core 9. Even in the power receiving core having the shape as shown in FIG. 6, leakage of magnetic flux from the gap to the outside is suppressed, and the same effect as described above can be obtained.
[0020]
Embodiment 2. FIG.
FIG. 7 is a cross-sectional view showing the structure near the power receiving unit 5 of the transport vehicle 4 together with the rail 3a in the automatic storage and retrieval apparatus according to the second embodiment of the present invention, and FIG. 8 relates to the second embodiment. 3 is a cross-sectional view showing a structure of a power receiving core 9. FIG. On the top surface 53 of the inner wall plate 9c, the magnetic body 12 is formed extending in the direction (X direction) in which the opening groove 50 extends. The width of the magnetic body 12 in the Y direction is wider than the width of the inner wall plate 9c in the Y direction, and the upper wall plates 9e and 9f and the magnetic body 12 partially overlap when viewed from the Z direction. The magnetic body 12 is a magnetic isotropic magnetic body integrally formed by baking and solidifying ferrite powder. In this specification, “magnetization isotropic” means a property in which a molded shape has low magnetic anisotropy and is easily magnetized relatively uniformly in any direction. The other structure of the power receiving unit 5 according to the second embodiment is the same as the structure of the power receiving unit 5 according to the first embodiment.
[0021]
FIG. 9 is a diagram illustrating a simulation result regarding the magnetic flux distribution when the power receiving core 9 according to the second embodiment is excited. As shown in the simulation result of FIG. 5, in the power receiving core 9 according to the first embodiment, the magnetic flux tends to concentrate near the top surface 53 of the inner wall plate 9c, and this portion is saturated quickly. There was a possibility that the power receiving core 9 could not be fully utilized. On the other hand, as shown in the simulation result of FIG. 9, in the power receiving core 9 according to the second embodiment, the magnetic flux concentrated near the top surface 53 of the inner wall plate 9 c It is uniformly distributed in the width direction (Y direction).
[0022]
As described above, according to the power receiving core 9 according to the second embodiment, since the wide and magnetized isotropic magnetic body 12 is provided on the top surface 53 of the inner wall plate 9c, the power is received by locally concentrated magnetic flux saturation. It can be avoided that the capability of the core 9 is suppressed.
[0023]
【The invention's effect】
According to the first aspect of the present invention, leakage of magnetic flux from the first and second gaps to the outside of the power receiving core can be suppressed.
[0024]
According to the second aspect of the present invention, it is possible to avoid the capability of the power receiving core from being suppressed by saturation of magnetic flux concentrated locally.
[0025]
According to the third aspect of the present invention, since the power feeding efficiency of the power receiving unit is improved, a large output power (secondary side) can be obtained with respect to the same input power (primary side). Moreover, since the influence which leakage magnetic flux has on the circumference | surroundings of a receiving core can be suppressed, it becomes possible to install electroconductive magnetic bodies, such as iron, in the location close | similar to a receiving core, and can raise the freedom degree of design.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing a configuration of an automatic storage and retrieval apparatus according to Embodiment 1 of the present invention.
FIG. 2 is a cross-sectional view showing a structure in the vicinity of a power receiving unit of a transport vehicle together with rails, with respect to the automatic storage search device according to Embodiment 1 of the present invention.
FIG. 3 is a perspective view showing a structure of a power receiving core together with an attachment member.
FIG. 4 is a cross-sectional view showing a structure of a power receiving core according to the first embodiment of the present invention.
FIG. 5 is a diagram showing a simulation result regarding a magnetic flux distribution when the power receiving core according to the first embodiment is excited.
FIG. 6 is a diagram showing a modification of the shape of the power receiving core.
FIG. 7 is a cross-sectional view showing a structure in the vicinity of a power receiving unit of a transport vehicle together with rails, with respect to the automatic storage search device according to Embodiment 2 of the present invention.
FIG. 8 is a sectional view showing a structure of a power receiving core according to a second embodiment of the present invention.
FIG. 9 is a diagram showing a simulation result regarding a magnetic flux distribution when the power receiving core according to the second embodiment of the present invention is excited.
FIG. 10 is a perspective view schematically showing a configuration of a conventional automatic storage / retrieval apparatus.
FIG. 11 is a cross-sectional view showing a structure near a power receiving unit of a conventional transport vehicle together with a rail.
FIG. 12 is a diagram showing a simulation result regarding a magnetic flux distribution when a conventional power receiving core is excited.
[Explanation of symbols]
3a, 3b Rail 4 Carrier vehicle 5 Power receiving unit 6 Holding member 7a, 7b Feed line 9 Power receiving core 12 Magnetic body 50 Opening groove

Claims (3)

互いに対向する第１及び第２の開口側面と、前記第１の開口側面と前記第２の開口側面とを繋ぐ開口溝とを有する、中空柱状の外壁枠体と、
前記開口溝が延在する方向に延在して形成され、かつ、前記開口溝に対向する部分の前記外壁枠体の内面から、頂面が前記開口溝に到達しないように前記開口溝に向かって形成された内壁板と
を備え、
前記開口溝は、前記外壁枠体の互いに対向する第１端面及び第２端面によって規定され、
前記外壁枠体の前記第１端面と前記内壁板の前記頂面とによって規定される第１のギャップと、前記外壁枠体の前記第２端面と前記内壁板の前記頂面とによって規定される第２のギャップとが形成されていることを特徴とする受電コア。A hollow columnar outer wall frame having first and second opening side surfaces facing each other, and an opening groove connecting the first opening side surface and the second opening side surface;
From the inner surface of the outer wall frame at the portion facing the opening groove, the top surface extends from the inner surface of the outer wall frame so as not to reach the opening groove. And an inner wall plate formed by
The opening groove is defined by a first end surface and a second end surface facing each other of the outer wall frame,
Defined by the first gap defined by the first end surface of the outer wall frame and the top surface of the inner wall plate, and by the second end surface of the outer wall frame and the top surface of the inner wall plate. A power receiving core, wherein a second gap is formed. 前記開口溝が延在する方向に延在して前記内壁板の前記頂面上に形成され、前記頂面よりも幅広の、磁化等方性の磁性部材をさらに備える、請求項１に記載の受電コア。2. The apparatus according to claim 1, further comprising a magnetic isotropic magnetic member that extends in a direction in which the opening groove extends and is formed on the top surface of the inner wall plate and is wider than the top surface. Power receiving core. 移動体が走行する軌道に沿って給電線を配設し、前記移動体が備える受電部に対して、前記給電線から非接触で電力を供給する、移動体への給電システムであって、
前記給電線は、保持部材によって前記軌道に沿って保持された、第１及び第２の給電線を含み、
前記受電部は、請求項１又は２に記載の受電コアを有し、
前記保持部材が前記開口溝並びに前記第１及び第２のギャップから前記受電コア内に挿入されることにより、前記第１及び第２の給電線が前記受電コアの内部空間に配設されている、移動体への給電システム。A power feeding system for a moving body, wherein a feeding line is disposed along a trajectory along which the moving body travels, and power is supplied in a non-contact manner from the power feeding line to a power receiving unit provided in the moving body,
The power supply line includes first and second power supply lines held along the track by a holding member;
The power reception unit includes the power reception core according to claim 1 or 2,
The holding member is inserted into the power receiving core from the opening groove and the first and second gaps, whereby the first and second power supply lines are disposed in the internal space of the power receiving core. , Power supply system for moving objects.
JP2001300173A 2001-09-28 2001-09-28 Power receiving core and power supply system for moving body Expired - Fee Related JP4712254B2 (en)

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JP2005186842A (en) 2003-12-26 2005-07-14 Murata Mach Ltd Track carriage system
EP2266123B1 (en) 2008-03-17 2018-10-10 Powermat Technologies Ltd. Inductive transmission system
US8981598B2 (en) 2008-07-02 2015-03-17 Powermat Technologies Ltd. Energy efficient inductive power transmission system and method
US11979201B2 (en) 2008-07-02 2024-05-07 Powermat Technologies Ltd. System and method for coded communication signals regulating inductive power transmissions
JP5297129B2 (en) * 2008-09-22 2013-09-25 パナソニック株式会社 Non-contact power feeding device
JP5276393B2 (en) * 2008-09-22 2013-08-28 パナソニック株式会社 Non-contact power feeding device
JP5635729B2 (en) * 2008-09-22 2014-12-03 パナソニック株式会社 Non-contact power feeding device
CN108599401B (en) * 2018-07-10 2024-06-11 中惠创智（深圳）无线供电技术有限公司 Wireless power supply device for track

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