WO2023218626A1 - Magnetic detection device - Google Patents

Magnetic detection device Download PDF

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Publication number
WO2023218626A1
WO2023218626A1 PCT/JP2022/020164 JP2022020164W WO2023218626A1 WO 2023218626 A1 WO2023218626 A1 WO 2023218626A1 JP 2022020164 W JP2022020164 W JP 2022020164W WO 2023218626 A1 WO2023218626 A1 WO 2023218626A1
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Prior art keywords
conductor
magnetic
section
conductor portion
magnetic flux
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PCT/JP2022/020164
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French (fr)
Japanese (ja)
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捷仁 鴫田
幸貴 内田
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株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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Priority to PCT/JP2022/020164 priority Critical patent/WO2023218626A1/en
Publication of WO2023218626A1 publication Critical patent/WO2023218626A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass

Definitions

  • the present disclosure relates to a magnetic sensing device.
  • Patent Document 1 discloses a current detection device that uses magnetic detection. This current detection device detects currents flowing through a plurality of conductors arranged adjacent to each other. This current detection device includes a detection element for detecting a current flowing through a conductor to be detected among a plurality of conductors via a magnetic field generated due to the current.
  • the detection element can detect the flow through the conductor not to be detected. It is affected by the magnetic field caused by the current.
  • a correction value in advance for correction based on the positional relationship between the detection element and the conductor other than the detection target, and use the correction value to correct the detected value.
  • the positional relationship between the detection element and the conductor other than the detection target may deviate from the expected position, and in this case, a detection error may occur due to the positional deviation.
  • the present disclosure discloses that in a configuration where the magnetic sensing part is affected by a magnetic field caused by a current flowing through a conductor part that is not a detection target, the magnetic field detection part is affected by a magnetic field that is generated due to a current flowing through a conductor part that is not a detection target.
  • the magnetic field detection part is affected by a magnetic field that is generated due to a current flowing through a conductor part that is not a detection target.
  • the magnetic sensing device of the present disclosure includes: A magnetic detection device installed in a vehicle between a battery and a load, A casing and a conductive path provided within the housing and supplying power supplied from the battery to the load side; Equipped with a magnetic detection section that outputs a signal according to the magnetic flux density of the magnetic flux passing through it,
  • the conductive path is a first conductor section that is a detection target of the magnetic detection section and extends along the Z direction; a second conductor portion arranged at intervals in a direction perpendicular to the Z direction with respect to the first conductor portion and extending along the Z direction;
  • the magnetic flux density in the magnetic sensing section caused by the current flowing through the first conductor section is N1
  • the magnetic flux density in the magnetic sensing part caused by the current flowing through the second conductor part is N2, Assuming that the second conductor part is moved to four locations shifted by 1.5 mm in the X direction and Y direction perpendicular to the Z direction, the magnetic flux density at which the error from N
  • the technology according to the present disclosure is directed to a configuration in which the magnetic detection unit is affected by a magnetic field caused by a current flowing through a conductor part that is not a detection target, and in which the magnetic detection unit is affected by a magnetic field generated due to a current flowing through a conductor part that is not a detection target. It is easy to suppress the effects of detection errors caused by
  • FIG. 1 is a configuration diagram schematically illustrating a magnetic detection device according to a first embodiment.
  • FIG. 2 is a cross-sectional view taken along line AA in FIG.
  • a magnetic detection device installed in a vehicle between a battery and a load, A casing and a conductive path provided within the housing and supplying power supplied from the battery to the load side; Equipped with a magnetic detection section that outputs a signal according to the magnetic flux density of the magnetic flux passing through it,
  • the conductive path is a first conductor section that is a detection target of the magnetic detection section and extends along the Z direction; a second conductor portion arranged at intervals in a direction perpendicular to the Z direction with respect to the first conductor portion and extending along the Z direction;
  • the magnetic flux density in the magnetic sensing section caused by the current flowing through the first conductor section is N1
  • the magnetic flux density in the magnetic sensing part caused by the current flowing through the second conductor part is N2, Assuming that the second conductor part is moved to four locations shifted by 1.5 mm in the X direction and Y direction perpendicular to the Z direction, the magnetic flux density at which the error from N2 is maximum is set as N3.
  • the degree of influence compared to the expected position is -7 It falls within a range greater than .00% and less than 7.00%. Therefore, according to this configuration, although the magnetic sensing part is placed in a position where it is affected by the magnetic flux generated due to the current flowing through the second conductor part, the positional relationship between the magnetic sensing part and the second conductor part is It is easy to suppress the effects of detection errors caused by
  • N2 is a total value of magnetic flux densities caused by each of the plurality of second conductor parts
  • N3 is the sum of magnetic flux densities at which the error from N2 is maximum when it is assumed that each of the plurality of second conductor parts is moved to four locations shifted by 1.5 mm in the X direction and the Y direction.
  • the magnetic detection device 10 shown in FIG. 1 is installed in a vehicle 1.
  • the magnetic detection device 10 is provided between the battery 2 and the load 3 and is electrically connected to the battery 2 and the load 3.
  • the magnetic detection device 10 is a so-called junction box.
  • the magnetic detection device 10 supplies power supplied from the battery 2 to the load 3 side.
  • the magnetic detection device 10 includes a housing 11, a conductive path 12, a magnetic detection section 13, and a control section 14.
  • the conductive path 12 is provided within the housing 11.
  • the conductive path 12 includes a first conductor portion 21 , a second conductor portion 22 , a first connecting conductor portion 24 , and a second connecting conductor portion 25 .
  • the first conductor part 21, the second conductor part 22, the first connecting conductor part 24, and the second connecting conductor part 25 are made of different members.
  • the first conductor section 21, the second conductor section 22, the first connecting conductor section 24, and the second connecting conductor section 25 are configured as a bus bar.
  • the first conductor portion 21 extends along the Z direction.
  • the first conductor portion 21 has a rectangular parallelepiped shape.
  • the length of the first conductor portion 21 in the X direction is longer than the length in the Y direction.
  • the X direction is a direction perpendicular to the Z direction.
  • the Y direction is a direction perpendicular to the Z direction and the X direction.
  • the second conductor portion 22 extends along the Z direction.
  • the second conductor portion 22 has a rectangular parallelepiped shape.
  • the length of the second conductor portion 22 in the X direction is longer than the length in the Y direction.
  • the second conductor section 22 is arranged at intervals from the first conductor section 21 in a direction perpendicular to the Z direction.
  • a plurality of second conductor portions 22 are provided.
  • the plurality of second conductor parts 22 include second conductor parts 22A and 22B.
  • the second conductor part 22A is arranged on one side in the X direction than the first conductor part 21, and on one side in the Y direction than the first conductor part 21 (see FIG. 2).
  • the second conductor portion 22B is disposed on the other side of the first conductor portion 21 in the X direction, and is disposed on one side of the first conductor portion 21 in the Y direction.
  • the second conductor portion 22B is arranged on the other side in the Y direction than the second conductor portion 22A (see FIG. 2).
  • the first connecting conductor section 24 connects the first conductor section 21 and the second conductor section 22A.
  • the first connecting conductor portion 24 is connected to the first conductor portion 21 and the second conductor portion 22A by, for example, a bolt 30.
  • the first connecting conductor section 24 is electrically connected to the first conductor section 21 and the second conductor section 22A.
  • the first connecting conductor portion 24 extends along the X direction.
  • the first connecting conductor portion 24 has a rectangular parallelepiped shape.
  • the first connecting conductor part 24 has a first connecting part 24A connected to the first conductor part 21 and a second connecting part 24B connected to the second conductor part 22A.
  • the first connecting portion 24A is provided at one end side of the first connecting conductor portion 24.
  • the first connecting portion 24A is connected to one end side of the first conductor portion 21.
  • the first connecting portion 24A is connected to the first conductor portion 21 by, for example, a bolt 30.
  • the second connecting portion 24B is provided on the other end side of the first connecting conductor portion 24.
  • the second connecting portion 24B is connected to one end side of the second conductor portion 22A.
  • the second connecting portion 24B is connected to the second conductor portion 22A by, for example, a bolt 30.
  • the first connecting conductor portion 24 has a first step portion 24C provided between the first connecting portion 24A and the second connecting portion 24B.
  • the first step portion 24C forms a step in the Y direction.
  • the second connecting conductor portion 25 connects the first conductor portion 21 and the second conductor portion 22B.
  • the second connecting conductor portion 25 is connected to the first conductor portion 21 and the second conductor portion 22B by, for example, a bolt 30.
  • the second connecting conductor section 25 is electrically connected to the first conductor section 21 and the second conductor section 22B.
  • the second connecting conductor portion 25 extends along the X direction.
  • the second connecting conductor portion 25 has a rectangular parallelepiped shape.
  • the second connecting conductor part 25 has a third connecting part 25A connected to the first conductor part 21 and a fourth connecting part 25B connected to the second conductor part 22B.
  • the third connecting portion 25A is provided on one end side of the second connecting conductor portion 25.
  • the third connecting portion 25A is connected to the other end side of the first conductor portion 21.
  • the third connecting portion 25A is connected to the first conductor portion 21 by, for example, a bolt 30.
  • the fourth connecting portion 25B is provided on the other end side of the second connecting conductor portion 25.
  • the fourth connecting portion 25B is connected to one end side of the second conductor portion 22B.
  • the fourth connecting portion 25B is connected to the second conductor portion 22B by, for example, a bolt 30.
  • the second connecting conductor portion 25 has a second step portion 25C provided between the third connecting portion 25A and the fourth connecting portion 25B.
  • the second step portion 25C forms a step in the Y direction.
  • the solid arrow shown in FIG. 1 indicates the direction in which the current flows from the battery 2 side to the load 3 side. Specifically, a current flows from the battery 2 side to the second conductor portion 22B, and then flows through the second connecting conductor portion 25, the first conductor portion 21, the first connecting conductor portion 24, and the second conductor portion 22A in this order.
  • the second conductor portion 22B current flows from one side to the other side in the Z direction.
  • the second connecting conductor portion 25 current flows from the other side to the one side in the X direction.
  • the first connecting conductor portion 24 current flows from the other side to the one side in the X direction.
  • the second conductor portion 22A current flows from one side to the other side in the Z direction.
  • the same current flows through the second conductor portion 22B, the second connecting conductor portion 25, the first conductor portion 21, the first connecting conductor portion 24, and the second conductor portion 22A.
  • the direction of the current flowing through the second conductor portions 22A, 22B is opposite to the direction of the current flowing through the first conductor portion 21. In other words, if the magnetic flux density in the magnetic sensing section 13 caused by the current flowing through the first conductor section 21 is positive, the magnetic flux density in the magnetic sensing section 13 due to the current flowing through the second conductor sections 22A and 22B is negative. .
  • the magnetic detection section 13 functions as a current sensor for detecting the current flowing through the first conductor section 21.
  • the magnetic detection section 13 is provided in the first conductor section 21 .
  • the magnetic detection section 13 is provided between the first connecting conductor section 24 and the second connecting conductor section 25 in the Z direction.
  • the magnetic detection section 13 is installed on the other surface of the first conductor section 21 in the Y direction.
  • the magnetic detection section 13 is fixed to the first conductor section 21 with adhesive, for example.
  • the first conductor portion 21 is fixed to the first conductor portion 21 via, for example, a substrate (not shown).
  • the substrate has insulating properties and is made of resin, for example.
  • the magnetic detection section 13 is, for example, a Hall element.
  • the magnetic detection section 13 outputs a signal according to the magnetic flux density of the magnetic flux passing through itself in the Y direction. This signal is input to the control section 14.
  • the control unit 14 is configured as, for example, an MCU (Micro Controller Unit).
  • the control section 14 specifies the value of the current flowing through the first conductor section 21 based on the signal output from the magnetic detection section 13.
  • the output value of the magnetic detection section 13 is influenced not only by the current flowing through the first conductor section 21 but also by the current flowing through the second conductor section 22. For this reason, the control unit 14 stores in advance a correction value that takes into account the positional relationship between the magnetic detection unit 13 and the second conductor unit 22, and uses this correction value to correct the output value of the magnetic detection unit 13. .
  • the correction value is, for example, a theoretical value of the magnetic flux density in the magnetic detection section 13 due to the current flowing through the second conductor section 22.
  • the control unit 14 corrects the output value of the magnetic detection unit 13 by subtracting the correction value.
  • the theoretical value of the magnetic flux density in the magnetic detection unit 13 is calculated as follows, for example. Below, the magnetic flux density in the magnetic sensing part 13 resulting from the current flowing through the first conductor part 21 will be explained as an example.
  • I[A] is the expected current value flowing through the first conductor portion 21.
  • A[m] is a value that is half the length of the cross section of the first conductor portion 21 in the X direction.
  • the cross-sectional area refers to a cross section cut along a virtual plane that passes through the detection position of the magnetic detection unit 13 and is perpendicular to the Z direction.
  • B[m] is a value that is half the length of the cross section of the first conductor portion 21 in the Y direction.
  • C1 to C4 are calculated using the following formulas (B), (C), (D), and (E).
  • C1 A+X...Formula (B)
  • C2 AX...Formula (C)
  • C3 B+Y...Formula (D)
  • C4 BY...Formula (E)
  • F1 to F8 are calculated by the following equations (F1) (F2) (F3) (F4) (F5) (F6) (F7) (F8).
  • F71 and F72 in formula (F7) are calculated by the following formulas (F71) and (F72).
  • F81 and F82 in formula (F8) are calculated by the following formulas (F81) and (F82).
  • Magnetic flux density ⁇ ⁇ (F1 + F2 + F3 + F4 + F5 + F6 + F7 + F8) / 2 ...
  • the first conductor portion 21 and the second conductor portion 22 are configured as separate members. Therefore, the positional relationship between the magnetic sensing section 13 provided in the first conductor section 21 and the second conductor section 22 may deviate from the expected position. Furthermore, the installation position of the magnetic detection unit 13 may deviate from the expected position. In these cases, detection errors may occur due to positional deviation.
  • the magnetic detection device 10 is configured as follows in order to suppress the influence of such detection errors.
  • the magnetic detection device 10 is configured such that the degree of influence determined by the following equation (1) satisfies the condition of the following equation (2).
  • Influence degree [%] (((N1+N3)/(N1+N2))-1) ⁇ 100...Formula (1) -7.00[%] ⁇ Influence [%] ⁇ 7.00[%] ...Formula (2)
  • N1 is the magnetic flux density in the magnetic sensing section 13 caused by the current flowing through the first conductor section 21.
  • N2 is the magnetic flux density in the magnetic sensing section 13 caused by the current flowing through the second conductor section 22.
  • N3 is the magnetic flux density at which the error from N2 is maximum when it is assumed that the second conductor portion 22 is moved to four locations shifted by 1.5 mm in the X direction and the Y direction. Specifically, the above four locations are a position where the second conductor part 22 is shifted by 1.5 mm to one side in the X direction, a position where the second conductor part 22 is shifted by 1.5 mm to one side in the Y direction, and a position where the second conductor part 22 is shifted to one side in the X direction.
  • the method for calculating the magnetic flux density is as described above.
  • N2 is the sum of the magnetic flux densities caused by each of the second conductor portions 22A and 22B.
  • N3 is the sum of magnetic flux densities at which the error from N2 is maximum when it is assumed that each of the second conductor parts 22A and 22B is moved to four locations shifted by 1.5 mm in the X direction and the Y direction. .
  • N3 is the sum value of the magnetic flux densities in the combination that gives the maximum error when summed.
  • this magnetic sensing device 10 is also applicable to a configuration in which a plurality of second conductor portions 22A and 22B exist.
  • the magnetic sensing device 10 includes a first connecting conductor section 24 that is arranged at a distance from the magnetic sensing section 13 in the Z direction and connects the first conductor section 21 and the second conductor section 22A.
  • a first connecting conductor section 24 that is arranged at a distance from the magnetic sensing section 13 in the Z direction and connects the first conductor section 21 and the second conductor section 22A.
  • the magnetic sensing device 10 includes a second connecting conductor section 25 that is spaced apart from the magnetic sensing section 13 in the Z direction and connects the first conductor section 21 and the second conductor section 22B.
  • the magnetic detection part 13 and the second conductor part 22B are It is easy to suppress the effects of detection errors.
  • the same current flows through the first conductor portion 21 and the second conductor portion 22A via the first connecting conductor portion 24.
  • the positional relationship between the magnetic sensing section 13 and the second conductor section 22A is It is easy to suppress the effects of detection errors caused by misalignment.
  • the same current flows through the first conductor portion 21 and the second conductor portion 22B via the second connecting conductor portion 25.
  • the positional relationship between the magnetic sensing portion 13 and the second conductor portion 22B is It is easy to suppress the effects of detection errors caused by misalignment.
  • the configuration is such that two second conductor parts are provided, but the configuration may be such that only one second conductor part is provided, or the configuration may be such that three or more second conductor parts are provided.
  • the first conductor part and the second conductor part are connected, but they may be unconnected.
  • the same current flows through the first conductor portion and the second conductor portion, but a configuration may be adopted where different currents flow through the first conductor portion and the second conductor portion.

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  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
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Abstract

In a magnetic detection device (10), an influence rate determined in accordance with Expression (1) shown below satisfies a condition represented by Expression (2) shown below.　Expression (1): Influence rate [%] = (((N1 + N3)/(N1 + N2)) − 1) × 100 Expression (2): −7.00 [%] < Influence rate [%] < 7.00 [%] N1 represents a magnetic flux density in a magnetic detection unit (13) due to a current flowing through a first conductor unit (21). N2 represents a magnetic flux density in the magnetic detection unit (13) due to a current flowing through a second conductor unit (22). N3 represents a magnetic flux density where an error between N3 and N2 is maximum, assuming that the second conductor unit (22) is moved to four different locations each with a 1.5 mm shift in X and Y directions.

Description

磁気検知装置magnetic detection device
　本開示は、磁気検知装置に関する。 The present disclosure relates to a magnetic sensing device.
　特許文献１には、磁気検知を利用した電流検出装置が開示されている。この電流検出装置は、互いに隣り合って配置された複数の導体を流れる電流を検出する。この電流検出装置は、複数の導体のうち検出対象の導体を流れる電流を、当該電流に起因して生じた磁界を介して検出するための検出素子を備える。 Patent Document 1 discloses a current detection device that uses magnetic detection. This current detection device detects currents flowing through a plurality of conductors arranged adjacent to each other. This current detection device includes a detection element for detecting a current flowing through a conductor to be detected among a plurality of conductors via a magnetic field generated due to the current.
特表２０２１－５１５１９４号公報Special Publication No. 2021-515194 特開２０１３－９０４７４号公報Japanese Patent Application Publication No. 2013-90474
　特許文献１の装置のように、複数の導体が隣り合って配置される構成では、検出対象の導体と検出対象外の導体との間隔を狭くすると、検出素子が、検出対象外の導体を流れる電流に起因して生じた磁界の影響を受けてしまう。その対策として、検出素子と検出対象外の導体との位置関係に基づいて補正するための補正値を予め設定しておき、その補正値を用いて検出値を補正することが考えられる。しかし、実際に導体を設置したとき、検出素子と検出対象外の導体との位置関係が想定とずれることもあり、この場合、位置ずれに起因した検知誤差が生じうる。 In a configuration in which a plurality of conductors are arranged next to each other, as in the device of Patent Document 1, when the distance between the conductor to be detected and the conductor not to be detected is narrowed, the detection element can detect the flow through the conductor not to be detected. It is affected by the magnetic field caused by the current. As a countermeasure, it is possible to set a correction value in advance for correction based on the positional relationship between the detection element and the conductor other than the detection target, and use the correction value to correct the detected value. However, when the conductor is actually installed, the positional relationship between the detection element and the conductor other than the detection target may deviate from the expected position, and in this case, a detection error may occur due to the positional deviation.
　本開示は、磁気検知部が検知対象外の導体部を流れる電流に起因して生じた磁界の影響を受ける構成において、磁気検知部と検知対象外の導体部との位置関係のずれに起因した検知誤差の影響を抑えやすい技術を提供する。 The present disclosure discloses that in a configuration where the magnetic sensing part is affected by a magnetic field caused by a current flowing through a conductor part that is not a detection target, the magnetic field detection part is affected by a magnetic field that is generated due to a current flowing through a conductor part that is not a detection target. Provide technology that easily suppresses the effects of detection errors.
　本開示の磁気検知装置は、
　車両に設置され、バッテリと負荷との間に設けられる磁気検知装置であって、
　筐体と、
　前記筐体内に設けられ、前記バッテリから供給される電力を前記負荷側に供給する導電路と、
　自身を通る磁束の磁束密度に応じた信号を出力する磁気検知部と、を備え、
　前記導電路は、
　前記磁気検知部の検知対象とされ、Ｚ方向に沿って延びる第１導体部と、
　前記第１導体部に対し前記Ｚ方向に直交する方向に間隔をあけて配置され、前記Ｚ方向に沿って延びる第２導体部と、を有し、
　前記第１導体部を流れる電流に起因した前記磁気検知部における磁束密度をＮ１とし、
　前記第２導体部を流れる電流に起因した前記磁気検知部における磁束密度をＮ２とし、
　前記第２導体部を前記Ｚ方向に直交するＸ方向及びＹ方向に１．５ｍｍずつずれた４カ所に移動させたと仮定したときにＮ２との誤差が最大となる磁束密度をＮ３とした場合に、
　以下の式（１）によって求められる影響度が、以下の式（２）の条件を満たす。
　　　影響度［％］＝（（（Ｎ１＋Ｎ３）／（Ｎ１＋Ｎ２））－１）×１００　・・・式（１）
　　　－７．００［％］＜影響度［％］＜７．００［％］　・・・式（２） The magnetic sensing device of the present disclosure includes:
A magnetic detection device installed in a vehicle between a battery and a load,
A casing and
a conductive path provided within the housing and supplying power supplied from the battery to the load side;
Equipped with a magnetic detection section that outputs a signal according to the magnetic flux density of the magnetic flux passing through it,
The conductive path is
a first conductor section that is a detection target of the magnetic detection section and extends along the Z direction;
a second conductor portion arranged at intervals in a direction perpendicular to the Z direction with respect to the first conductor portion and extending along the Z direction;
The magnetic flux density in the magnetic sensing section caused by the current flowing through the first conductor section is N1,
The magnetic flux density in the magnetic sensing part caused by the current flowing through the second conductor part is N2,
Assuming that the second conductor part is moved to four locations shifted by 1.5 mm in the X direction and Y direction perpendicular to the Z direction, the magnetic flux density at which the error from N2 is maximum is set as N3. ,
The degree of influence determined by the following equation (1) satisfies the condition of the following equation (2).
Influence degree [%] = (((N1+N3)/(N1+N2))-1)×100...Formula (1)
-7.00[%]<Influence [%]<7.00[%] ...Formula (2)
　本開示に係る技術は、磁気検知部が検知対象外の導体部を流れる電流に起因して生じた磁界の影響を受ける構成において、磁気検知部と検知対象外の導体部との位置関係のずれに起因した検知誤差の影響を抑えやすい。 The technology according to the present disclosure is directed to a configuration in which the magnetic detection unit is affected by a magnetic field caused by a current flowing through a conductor part that is not a detection target, and in which the magnetic detection unit is affected by a magnetic field generated due to a current flowing through a conductor part that is not a detection target. It is easy to suppress the effects of detection errors caused by
図１は、第１実施形態に係る磁気検知装置を概略的に例示する構成図である。FIG. 1 is a configuration diagram schematically illustrating a magnetic detection device according to a first embodiment. 図２は、図１のＡ－Ａ線断面図である。FIG. 2 is a cross-sectional view taken along line AA in FIG.
　以下では、本開示の実施形態が列記されて例示される。 Below, embodiments of the present disclosure are listed and illustrated.
　〔１〕車両に設置され、バッテリと負荷との間に設けられる磁気検知装置であって、
　筐体と、
　前記筐体内に設けられ、前記バッテリから供給される電力を前記負荷側に供給する導電路と、
　自身を通る磁束の磁束密度に応じた信号を出力する磁気検知部と、を備え、
　前記導電路は、
　前記磁気検知部の検知対象とされ、Ｚ方向に沿って延びる第１導体部と、
　前記第１導体部に対し前記Ｚ方向に直交する方向に間隔をあけて配置され、前記Ｚ方向に沿って延びる第２導体部と、を有し、
　前記第１導体部を流れる電流に起因した前記磁気検知部における磁束密度をＮ１とし、
　前記第２導体部を流れる電流に起因した前記磁気検知部における磁束密度をＮ２とし、
　前記第２導体部を前記Ｚ方向に直交するＸ方向及びＹ方向に１．５ｍｍずつずれた４カ所に移動させたと仮定したときにＮ２との誤差が最大となる磁束密度をＮ３とした場合に、
　以下の式（１）によって求められる影響度が、以下の式（２）の条件を満たす磁気検知装置。
　　　影響度［％］＝（（（Ｎ１＋Ｎ３）／（Ｎ１＋Ｎ２））－１）×１００　・・・式（１）
　　　－７．００［％］＜影響度［％］＜７．００［％］　・・・式（２） [1] A magnetic detection device installed in a vehicle between a battery and a load,
A casing and
a conductive path provided within the housing and supplying power supplied from the battery to the load side;
Equipped with a magnetic detection section that outputs a signal according to the magnetic flux density of the magnetic flux passing through it,
The conductive path is
a first conductor section that is a detection target of the magnetic detection section and extends along the Z direction;
a second conductor portion arranged at intervals in a direction perpendicular to the Z direction with respect to the first conductor portion and extending along the Z direction;
The magnetic flux density in the magnetic sensing section caused by the current flowing through the first conductor section is N1,
The magnetic flux density in the magnetic sensing part caused by the current flowing through the second conductor part is N2,
Assuming that the second conductor part is moved to four locations shifted by 1.5 mm in the X direction and Y direction perpendicular to the Z direction, the magnetic flux density at which the error from N2 is maximum is set as N3. ,
A magnetic sensing device in which the degree of influence determined by the following equation (1) satisfies the condition of the following equation (2).
Influence degree [%] = (((N1+N3)/(N1+N2))-1)×100...Formula (1)
-7.00[%]<Influence [%]<7.00[%] ...Formula (2)
　この磁気検知装置は、磁気検知部と第２導体部とのＸ方向及びＹ方向の位置関係がそれぞれ想定位置よりも１．５ｍｍずれていたとしても、想定位置と比較した影響度が、－７．００％よりも大きく且つ７．００％よりも小さい範囲内に収まる。したがって、この構成によれば、磁気検知部を、第２導体部を流れる電流に起因して生じる磁束の影響を受ける位置に置きつつも、磁気検知部と第２導体部との位置関係のずれに起因した検知誤差の影響を抑えやすい。 In this magnetic sensing device, even if the positional relationship between the magnetic sensing part and the second conductor part in the X direction and the Y direction is deviated from the expected position by 1.5 mm, the degree of influence compared to the expected position is -7 It falls within a range greater than .00% and less than 7.00%. Therefore, according to this configuration, although the magnetic sensing part is placed in a position where it is affected by the magnetic flux generated due to the current flowing through the second conductor part, the positional relationship between the magnetic sensing part and the second conductor part is It is easy to suppress the effects of detection errors caused by
　〔２〕前記第２導体部は、複数設けられ、
　Ｎ２は、複数の前記第２導体部の各々に起因した磁束密度の合算値であり、
　Ｎ３は、複数の前記第２導体部の各々を前記Ｘ方向及び前記Ｙ方向に１．５ｍｍずつずれた４カ所に移動させたと仮定したときにＮ２との誤差が最大となる磁束密度の合算値である〔１〕に記載の磁気検知装置。 [2] A plurality of the second conductor portions are provided,
N2 is a total value of magnetic flux densities caused by each of the plurality of second conductor parts,
N3 is the sum of magnetic flux densities at which the error from N2 is maximum when it is assumed that each of the plurality of second conductor parts is moved to four locations shifted by 1.5 mm in the X direction and the Y direction. The magnetic detection device according to [1].
　この構成によれば、第２導体部が複数存在する構成においても、磁気検知部と第２導体部との位置関係のずれに起因した検知誤差の影響を抑えやすい。 According to this configuration, even in a configuration in which there are a plurality of second conductor parts, it is easy to suppress the influence of detection errors caused by misalignment of the positional relationship between the magnetic sensing part and the second conductor part.
　〔３〕前記磁気検知部とは前記Ｚ方向に間隔をあけて配置され、前記第１導体部と前記第２導体部とをつなぐ連結導体部を備える〔１〕又は〔２〕に記載の磁気検知装置。 [3] The magnetic sensing unit according to [1] or [2], which is arranged at intervals in the Z direction and includes a connecting conductor part that connects the first conductor part and the second conductor part. Detection device.
　この構成によれば、第１導体部と第２導体部とが連結導体部によって繋がれる構成において、磁気検知部と第２導体部との位置関係のずれに起因した検知誤差の影響を抑えやすい。 According to this configuration, in a configuration in which the first conductor part and the second conductor part are connected by the connecting conductor part, it is easy to suppress the influence of detection errors caused by misalignment of the positional relationship between the magnetic sensing part and the second conductor part. .
　〔４〕前記連結導体部を介して、前記第１導体部と前記第２導体部とに同じ電流が流れる〔３〕に記載の磁気検知装置。 [4] The magnetic sensing device according to [3], wherein the same current flows through the first conductor part and the second conductor part via the connecting conductor part.
　この構成によれば、連結導体部を介して第１導体部と第２導体部とに同じ電流が流れる構成において、磁気検知部と第２導体部との位置関係のずれに起因した検知誤差の影響を抑えやすい。 According to this configuration, in a configuration in which the same current flows through the first conductor part and the second conductor part via the connecting conductor part, a detection error due to a misalignment in the positional relationship between the magnetic sensing part and the second conductor part is reduced. It is easy to suppress the impact.
　＜第１実施形態＞
　１．磁気検知装置１０の構成
　図１に示す磁気検知装置１０は、車両１に設置される。磁気検知装置１０は、バッテリ２と負荷３との間に設けられ、バッテリ２と負荷３とに電気的に接続される。磁気検知装置１０は、いわゆるジャンクションボックスである。磁気検知装置１０は、バッテリ２から供給される電力を負荷３側に供給する。磁気検知装置１０は、筐体１１と、導電路１２と、磁気検知部１３と、制御部１４と、を備えている。 <First embodiment>
1. Configuration of Magnetic Detection Device 10 The magnetic detection device 10 shown in FIG. 1 is installed in a vehicle 1. The magnetic detection device 10 is provided between the battery 2 and the load 3 and is electrically connected to the battery 2 and the load 3. The magnetic detection device 10 is a so-called junction box. The magnetic detection device 10 supplies power supplied from the battery 2 to the load 3 side. The magnetic detection device 10 includes a housing 11, a conductive path 12, a magnetic detection section 13, and a control section 14.
　導電路１２は、筐体１１内に設けられる。導電路１２は、第１導体部２１と、第２導体部２２と、第１連結導体部２４と、第２連結導体部２５と、を有している。 The conductive path 12 is provided within the housing 11. The conductive path 12 includes a first conductor portion 21 , a second conductor portion 22 , a first connecting conductor portion 24 , and a second connecting conductor portion 25 .
　第１導体部２１、第２導体部２２、第１連結導体部２４、及び第２連結導体部２５は、互いに異なる部材によって構成されている。第１導体部２１、第２導体部２２、第１連結導体部２４、及び第２連結導体部２５は、バスバーとして構成されている。 The first conductor part 21, the second conductor part 22, the first connecting conductor part 24, and the second connecting conductor part 25 are made of different members. The first conductor section 21, the second conductor section 22, the first connecting conductor section 24, and the second connecting conductor section 25 are configured as a bus bar.
　第１導体部２１は、Ｚ方向に沿って延びている。第１導体部２１は、直方体状をなしている。第１導体部２１のＸ方向の長さは、Ｙ方向の長さよりも長い。Ｘ方向は、Ｚ方向に直交する方向である。Ｙ方向は、Ｚ方向及びＸ方向に直交する方向である。 The first conductor portion 21 extends along the Z direction. The first conductor portion 21 has a rectangular parallelepiped shape. The length of the first conductor portion 21 in the X direction is longer than the length in the Y direction. The X direction is a direction perpendicular to the Z direction. The Y direction is a direction perpendicular to the Z direction and the X direction.
　第２導体部２２は、Ｚ方向に沿って延びている。第２導体部２２は、直方体状をなしている。第２導体部２２のＸ方向の長さは、Ｙ方向の長さよりも長い。第２導体部２２は、第１導体部２１に対しＺ方向に直交する方向に間隔をあけて配置されている。 The second conductor portion 22 extends along the Z direction. The second conductor portion 22 has a rectangular parallelepiped shape. The length of the second conductor portion 22 in the X direction is longer than the length in the Y direction. The second conductor section 22 is arranged at intervals from the first conductor section 21 in a direction perpendicular to the Z direction.
　第２導体部２２は、複数設けられている。複数の第２導体部２２は、第２導体部２２Ａ，２２Ｂを含む。第２導体部２２Ａは、第１導体部２１よりもＸ方向の一方側に配置されており、第１導体部２１よりもＹ方向の一方側に配置されている（図２参照）。第２導体部２２Ｂは、第１導体部２１よりもＸ方向の他方側に配置されており、第１導体部２１よりもＹ方向の一方側に配置されている。第２導体部２２Ｂは、第２導体部２２ＡよりもＹ方向の他方側に配置されている（図２参照）。 A plurality of second conductor portions 22 are provided. The plurality of second conductor parts 22 include second conductor parts 22A and 22B. The second conductor part 22A is arranged on one side in the X direction than the first conductor part 21, and on one side in the Y direction than the first conductor part 21 (see FIG. 2). The second conductor portion 22B is disposed on the other side of the first conductor portion 21 in the X direction, and is disposed on one side of the first conductor portion 21 in the Y direction. The second conductor portion 22B is arranged on the other side in the Y direction than the second conductor portion 22A (see FIG. 2).
　第１連結導体部２４は、第１導体部２１と第２導体部２２Ａとを連結している。第１連結導体部２４は、例えばボルト３０によって第１導体部２１と第２導体部２２Ａとに連結されている。第１連結導体部２４は、第１導体部２１と第２導体部２２Ａとに電気的に接続されている。第１連結導体部２４は、Ｘ方向に沿って延びている。第１連結導体部２４は、直方体状をなしている。 The first connecting conductor section 24 connects the first conductor section 21 and the second conductor section 22A. The first connecting conductor portion 24 is connected to the first conductor portion 21 and the second conductor portion 22A by, for example, a bolt 30. The first connecting conductor section 24 is electrically connected to the first conductor section 21 and the second conductor section 22A. The first connecting conductor portion 24 extends along the X direction. The first connecting conductor portion 24 has a rectangular parallelepiped shape.
　第１連結導体部２４は、第１導体部２１に連結される第１連結部２４Ａと、第２導体部２２Ａに連結される第２連結部２４Ｂと、を有している。第１連結部２４Ａは、第１連結導体部２４の一端側に設けられている。第１連結部２４Ａは、第１導体部２１の一端側に連結されている。第１連結部２４Ａは、例えばボルト３０によって第１導体部２１に連結されている。第２連結部２４Ｂは、第１連結導体部２４の他端側に設けられている。第２連結部２４Ｂは、第２導体部２２Ａの一端側に連結されている。第２連結部２４Ｂは、例えばボルト３０によって第２導体部２２Ａに連結されている。 The first connecting conductor part 24 has a first connecting part 24A connected to the first conductor part 21 and a second connecting part 24B connected to the second conductor part 22A. The first connecting portion 24A is provided at one end side of the first connecting conductor portion 24. The first connecting portion 24A is connected to one end side of the first conductor portion 21. The first connecting portion 24A is connected to the first conductor portion 21 by, for example, a bolt 30. The second connecting portion 24B is provided on the other end side of the first connecting conductor portion 24. The second connecting portion 24B is connected to one end side of the second conductor portion 22A. The second connecting portion 24B is connected to the second conductor portion 22A by, for example, a bolt 30.
　第１連結導体部２４は、第１連結部２４Ａと第２連結部２４Ｂとの間に設けられた第１段差部２４Ｃを有している。第１段差部２４Ｃは、Ｙ方向に段差を形成している。 The first connecting conductor portion 24 has a first step portion 24C provided between the first connecting portion 24A and the second connecting portion 24B. The first step portion 24C forms a step in the Y direction.
　第２連結導体部２５は、第１導体部２１と第２導体部２２Ｂとを連結している。第２連結導体部２５は、例えばボルト３０によって第１導体部２１と第２導体部２２Ｂとに連結されている。第２連結導体部２５は、第１導体部２１と第２導体部２２Ｂとに電気的に接続されている。第２連結導体部２５は、Ｘ方向に沿って延びている。第２連結導体部２５は、直方体状をなしている。 The second connecting conductor portion 25 connects the first conductor portion 21 and the second conductor portion 22B. The second connecting conductor portion 25 is connected to the first conductor portion 21 and the second conductor portion 22B by, for example, a bolt 30. The second connecting conductor section 25 is electrically connected to the first conductor section 21 and the second conductor section 22B. The second connecting conductor portion 25 extends along the X direction. The second connecting conductor portion 25 has a rectangular parallelepiped shape.
　第２連結導体部２５は、第１導体部２１に連結される第３連結部２５Ａと、第２導体部２２Ｂに連結される第４連結部２５Ｂと、を有している。第３連結部２５Ａは、第２連結導体部２５の一端側に設けられている。第３連結部２５Ａは、第１導体部２１の他端側に連結されている。第３連結部２５Ａは、例えばボルト３０によって第１導体部２１に連結されている。第４連結部２５Ｂは、第２連結導体部２５の他端側に設けられている。第４連結部２５Ｂは、第２導体部２２Ｂの一端側に連結されている。第４連結部２５Ｂは、例えばボルト３０によって第２導体部２２Ｂに連結されている。 The second connecting conductor part 25 has a third connecting part 25A connected to the first conductor part 21 and a fourth connecting part 25B connected to the second conductor part 22B. The third connecting portion 25A is provided on one end side of the second connecting conductor portion 25. The third connecting portion 25A is connected to the other end side of the first conductor portion 21. The third connecting portion 25A is connected to the first conductor portion 21 by, for example, a bolt 30. The fourth connecting portion 25B is provided on the other end side of the second connecting conductor portion 25. The fourth connecting portion 25B is connected to one end side of the second conductor portion 22B. The fourth connecting portion 25B is connected to the second conductor portion 22B by, for example, a bolt 30.
　第２連結導体部２５は、第３連結部２５Ａと第４連結部２５Ｂとの間に設けられた第２段差部２５Ｃを有している。第２段差部２５Ｃは、Ｙ方向に段差を形成している。 The second connecting conductor portion 25 has a second step portion 25C provided between the third connecting portion 25A and the fourth connecting portion 25B. The second step portion 25C forms a step in the Y direction.
　図１に示す実線の矢印は、バッテリ２側から負荷３側に電流が流れるときの電流が流れる向きを示している。具体的には、バッテリ２側から第２導体部２２Ｂに電流が流れ、第２連結導体部２５、第１導体部２１、第１連結導体部２４、第２導体部２２Ａの順に電流が流れる。第２導体部２２Ｂにおいて、電流は、Ｚ方向の一方側から他方側に流れる。第２連結導体部２５において、電流は、Ｘ方向の他方側から一方側に流れる。第１導体部２１において、電流は、Ｚ方向の他方側から一方側に流れる。第１連結導体部２４において、電流は、Ｘ方向の他方側から一方側に流れる。第２導体部２２Ａにおいて、電流は、Ｚ方向の一方側から他方側に流れる。第２導体部２２Ｂ、第２連結導体部２５、第１導体部２１、第１連結導体部２４、第２導体部２２Ａには、同じ電流が流れる。第２導体部２２Ａ，２２Ｂを流れる電流の向きは、第１導体部２１を流れる電流の向きと逆向きである。つまり、第１導体部２１を流れる電流に起因した磁気検知部１３における磁束密度を正とした場合、第２導体部２２Ａ，２２Ｂを流れる電流に起因した磁気検知部１３における磁束密度は負となる。 The solid arrow shown in FIG. 1 indicates the direction in which the current flows from the battery 2 side to the load 3 side. Specifically, a current flows from the battery 2 side to the second conductor portion 22B, and then flows through the second connecting conductor portion 25, the first conductor portion 21, the first connecting conductor portion 24, and the second conductor portion 22A in this order. In the second conductor portion 22B, current flows from one side to the other side in the Z direction. In the second connecting conductor portion 25, current flows from the other side to the one side in the X direction. In the first conductor portion 21, current flows from the other side to the one side in the Z direction. In the first connecting conductor portion 24, current flows from the other side to the one side in the X direction. In the second conductor portion 22A, current flows from one side to the other side in the Z direction. The same current flows through the second conductor portion 22B, the second connecting conductor portion 25, the first conductor portion 21, the first connecting conductor portion 24, and the second conductor portion 22A. The direction of the current flowing through the second conductor portions 22A, 22B is opposite to the direction of the current flowing through the first conductor portion 21. In other words, if the magnetic flux density in the magnetic sensing section 13 caused by the current flowing through the first conductor section 21 is positive, the magnetic flux density in the magnetic sensing section 13 due to the current flowing through the second conductor sections 22A and 22B is negative. .
　磁気検知部１３は、第１導体部２１を流れる電流を検出するための電流センサとして機能する。磁気検知部１３は、第１導体部２１に設けられている。磁気検知部１３は、Ｚ方向において、第１連結導体部２４と第２連結導体部２５との間に設けられている。磁気検知部１３は、第１導体部２１のＹ方向の他方側の面に設置されている。磁気検知部１３は、例えば接着剤によって第１導体部２１に固定されている。第１導体部２１は、例えば基板（図示省略）を介して第１導体部２１に固定されている。基板は、絶縁性を有し、例えば樹脂製である。 The magnetic detection section 13 functions as a current sensor for detecting the current flowing through the first conductor section 21. The magnetic detection section 13 is provided in the first conductor section 21 . The magnetic detection section 13 is provided between the first connecting conductor section 24 and the second connecting conductor section 25 in the Z direction. The magnetic detection section 13 is installed on the other surface of the first conductor section 21 in the Y direction. The magnetic detection section 13 is fixed to the first conductor section 21 with adhesive, for example. The first conductor portion 21 is fixed to the first conductor portion 21 via, for example, a substrate (not shown). The substrate has insulating properties and is made of resin, for example.
　磁気検知部１３は、例えばホール素子である。磁気検知部１３は、自身をＹ方向に通る磁束の磁束密度に応じて信号を出力する。この信号は、制御部１４に入力される。 The magnetic detection section 13 is, for example, a Hall element. The magnetic detection section 13 outputs a signal according to the magnetic flux density of the magnetic flux passing through itself in the Y direction. This signal is input to the control section 14.
　制御部１４は、例えばＭＣＵ（Ｍｉｃｒｏ　Ｃｏｎｔｒｏｌｌｅｒ　Ｕｎｉｔ）として構成されている。制御部１４は、磁気検知部１３から出力された信号に基づいて、第１導体部２１を流れる電流値を特定する。磁気検知部１３の出力値は、第１導体部２１を流れる電流だけでなく、第２導体部２２を流れる電流にも影響される。このため、制御部１４は、磁気検知部１３と第２導体部２２との位置関係を考慮した補正値を予め記憶しており、この補正値を用いて磁気検知部１３の出力値を補正する。補正値は、例えば、第２導体部２２を流れる電流に起因した磁気検知部１３における磁束密度の理論値である。制御部１４は、磁気検知部１３の出力値から補正値を差し引くことで、補正する。 The control unit 14 is configured as, for example, an MCU (Micro Controller Unit). The control section 14 specifies the value of the current flowing through the first conductor section 21 based on the signal output from the magnetic detection section 13. The output value of the magnetic detection section 13 is influenced not only by the current flowing through the first conductor section 21 but also by the current flowing through the second conductor section 22. For this reason, the control unit 14 stores in advance a correction value that takes into account the positional relationship between the magnetic detection unit 13 and the second conductor unit 22, and uses this correction value to correct the output value of the magnetic detection unit 13. . The correction value is, for example, a theoretical value of the magnetic flux density in the magnetic detection section 13 due to the current flowing through the second conductor section 22. The control unit 14 corrects the output value of the magnetic detection unit 13 by subtracting the correction value.
　磁気検知部１３における磁束密度の理論値は、例えば以下のように算出される。
　以下では、第１導体部２１を流れる電流に起因した磁気検知部１３における磁束密度を例に説明する。まず、式（Ａ）によって係数αが算出される。
　　　α＝（μ０×Ｉ）／（８π×Ａ×Ｂ）　・・・式（Ａ）
　μ０は、真空の透磁率である。
　Ｉ［Ａ］は、第１導体部２１を流れる想定の電流値である。
　Ａ［ｍ］は、第１導体部２１の断面のＸ方向を長さの半分の値である。なお、本明細書において、断面積とは、磁気検知部１３の検知位置を通り且つＺ方向に直交する仮想平面で切断した断面のことを意味する。
　Ｂ［ｍ］は、第１導体部２１の断面のＹ方向を長さの半分の値である。 The theoretical value of the magnetic flux density in the magnetic detection unit 13 is calculated as follows, for example.
Below, the magnetic flux density in the magnetic sensing part 13 resulting from the current flowing through the first conductor part 21 will be explained as an example. First, the coefficient α is calculated using equation (A).
α=(μ0×I)/(8π×A×B) ...Formula (A)
μ0 is the magnetic permeability of vacuum.
I[A] is the expected current value flowing through the first conductor portion 21.
A[m] is a value that is half the length of the cross section of the first conductor portion 21 in the X direction. Note that in this specification, the cross-sectional area refers to a cross section cut along a virtual plane that passes through the detection position of the magnetic detection unit 13 and is perpendicular to the Z direction.
B[m] is a value that is half the length of the cross section of the first conductor portion 21 in the Y direction.
　続いて、第１導体部２１の断面の中心から磁気検知部１３の検知位置までのＸ方向の長さをＸ［ｍ］とし、Ｙ方向の長さをＹ［ｍ］とする。なお、Ｘ［ｍ］は、Ｘ方向の一方側を正とし、他方側を負とする。また、Ｙ［ｍ］は、Ｙ方向の他方側を正とし、一方側を負とする。 Subsequently, let the length in the X direction from the center of the cross section of the first conductor part 21 to the detection position of the magnetic sensing part 13 be X [m], and let the length in the Y direction be Y [m]. Note that for X[m], one side in the X direction is positive and the other side is negative. Further, for Y[m], the other side in the Y direction is positive and the one side is negative.
　以下の式（Ｂ）（Ｃ）（Ｄ）（Ｅ）によって、Ｃ１～Ｃ４が算出される。
　　　Ｃ１＝Ａ＋Ｘ　・・・式（Ｂ）
　　　Ｃ２＝Ａ－Ｘ　・・・式（Ｃ）
　　　Ｃ３＝Ｂ＋Ｙ　・・・式（Ｄ）
　　　Ｃ４＝Ｂ－Ｙ　・・・式（Ｅ） C1 to C4 are calculated using the following formulas (B), (C), (D), and (E).
C1=A+X...Formula (B)
C2=AX...Formula (C)
C3=B+Y...Formula (D)
C4=BY...Formula (E)
　以下の式（Ｆ１）（Ｆ２）（Ｆ３）（Ｆ４）（Ｆ５）（Ｆ６）（Ｆ７）（Ｆ８）によって、Ｆ１～Ｆ８が算出される。式（Ｆ７）のＦ７１，Ｆ７２は、以下の式（Ｆ７１），（Ｆ７２）によって算出される。式（Ｆ８）のＦ８１，Ｆ８２は、以下の式（Ｆ８１），（Ｆ８２）によって算出される。
　　　Ｆ１＝Ｃ２×（－（２×Ｃ４２）／（Ｃ２２＋Ｃ４２）－ｌｏｇ（Ｃ２２＋Ｃ４２））　・・・式（Ｆ１）
　　　Ｆ２＝Ｃ１×（－（２×Ｃ４２）／（Ｃ１２＋Ｃ４２）－ｌｏｇ（Ｃ１２＋Ｃ４２））　・・・式（Ｆ２）
　　　Ｆ３＝Ｃ１×（－（２×Ｃ３２）／（Ｃ１２＋Ｃ３２）－ｌｏｇ（Ｃ１２＋Ｃ３２））　・・・式（Ｆ３）
　　　Ｆ４＝Ｃ２×（－（２×Ｃ３２）／（Ｃ２２＋Ｃ３２）－ｌｏｇ（Ｃ２２＋Ｃ３２））　・・・式（Ｆ４）
　　　Ｆ５＝（４×Ｂ×Ｙ×Ｃ２３）／（Ａ２－２×Ａ×Ｘ＋Ｂ２－２×Ｂ×Ｙ＋Ｘ２＋Ｙ２）×（Ａ２－２×Ａ×Ｘ＋Ｂ２＋２×Ｂ×Ｙ＋Ｘ２＋Ｙ２）　・・・式（Ｆ５）
　　　Ｆ６＝（４×Ｂ×Ｙ×Ｃ１３）／（Ａ２＋２×Ａ×Ｘ＋Ｂ２－２×Ｂ×Ｙ＋Ｘ２＋Ｙ２）×（Ａ２＋２×Ａ×Ｘ＋Ｂ２＋２×Ｂ×Ｙ＋Ｘ２＋Ｙ２）　・・・式（Ｆ６）
　　　Ｆ７＝Ｃ４×（Ｆ７１－Ｆ７２）　・・・式（Ｆ７）
　　　Ｆ７１＝（（Ｃ２／（Ｃ２２／Ｃ４２＋１））＋（Ｃ１／（Ｃ１２／Ｃ４２＋１）））／Ｃ４　・・・式（Ｆ７１）
　　　Ｆ７２＝２×（ａｃｔａｎ（Ｃ２／Ｃ４）＋ａｃｔａｎ（Ｃ１／Ｃ４））　・・・式（Ｆ７２）
　　　Ｆ８＝Ｃ３×（Ｆ８２－Ｆ８１）　・・・式（Ｆ８）
　　　Ｆ７１＝（（Ｃ２／（Ｃ２２／Ｃ３２＋１））＋（Ｃ１／（Ｃ１２／Ｃ３２＋１）））／Ｃ３　・・・式（Ｆ８１）
　　　Ｆ７２＝２×（ａｃｔａｎ（Ｃ２／Ｃ３）＋ａｃｔａｎ（Ｃ１／Ｃ３））　・・・式（Ｆ８２） F1 to F8 are calculated by the following equations (F1) (F2) (F3) (F4) (F5) (F6) (F7) (F8). F71 and F72 in formula (F7) are calculated by the following formulas (F71) and (F72). F81 and F82 in formula (F8) are calculated by the following formulas (F81) and (F82).
F1=C2×(-(2×C4 2 )/(C2 2 +C4 2 )-log(C2 2 +C4 2 )) ...Formula (F1)
F2=C1×(-(2×C4 2 )/(C1 2 +C4 2 )-log(C1 2 +C4 2 )) ...Formula (F2)
F3=C1×(-(2×C3 2 )/(C1 2 +C3 2 )-log(C1 2 +C3 2 )) ...Formula (F3)
F4=C2×(-(2×C3 2 )/(C2 2 +C3 2 )-log(C2 2 +C3 2 )) ...Formula (F4)
F5=(4×B×Y×C2 3 )/(A 2 −2×A×X+B 2 −2×B×Y+X 2 +Y 2 )×(A 2 −2×A×X+B 2 +2×B×Y+X 2 +Y 2 ) ...Formula (F5)
F6=(4×B×Y×C1 3 )/(A 2 +2×A×X+B 2 −2×B×Y+X 2 +Y 2 )×(A 2 +2×A×X+B 2 +2×B×Y+X 2 +Y 2 ) ...Formula (F6)
F7=C4×(F71-F72) ...Formula (F7)
F71=((C2/(C2 2 /C4 2 +1))+(C1/(C1 2 /C4 2 +1)))/C4...Formula (F71)
F72=2×(actan(C2/C4)+actan(C1/C4))...Formula (F72)
F8=C3×(F82-F81) ...Formula (F8)
F71=((C2/(C2 2 /C3 2 +1))+(C1/(C1 2 /C3 2 +1)))/C3...Formula (F81)
F72=2×(actan(C2/C3)+actan(C1/C3))...Formula (F82)
　以下の式（Ｇ）によって磁束密度の理論値が算出される。
　磁束密度＝α×（Ｆ１＋Ｆ２＋Ｆ３＋Ｆ４＋Ｆ５＋Ｆ６＋Ｆ７＋Ｆ８）／２　・・・式（Ｇ） The theoretical value of the magnetic flux density is calculated by the following equation (G).
Magnetic flux density = α × (F1 + F2 + F3 + F4 + F5 + F6 + F7 + F8) / 2 ... Formula (G)
　第１導体部２１と第２導体部２２とは互いに別部材として構成されている。このため、第１導体部２１に設けられる磁気検知部１３と第２導体部２２との位置関係は、想定とずれるおそれがある。また、磁気検知部１３の設置位置が、想定の位置からずれる可能性もある。これらの場合、位置ずれに起因した検知誤差が生じうる。磁気検知装置１０は、こうした検知誤差の影響を抑えるべく、以下のように構成されている。 The first conductor portion 21 and the second conductor portion 22 are configured as separate members. Therefore, the positional relationship between the magnetic sensing section 13 provided in the first conductor section 21 and the second conductor section 22 may deviate from the expected position. Furthermore, the installation position of the magnetic detection unit 13 may deviate from the expected position. In these cases, detection errors may occur due to positional deviation. The magnetic detection device 10 is configured as follows in order to suppress the influence of such detection errors.
　磁気検知装置１０は、以下の式（１）によって求められる影響度が、以下の式（２）の条件を満たすように構成されている。
　　　影響度［％］＝（（（Ｎ１＋Ｎ３）／（Ｎ１＋Ｎ２））－１）×１００　・・・式（１）
　　　－７．００［％］＜影響度［％］＜７．００［％］　・・・式（２） The magnetic detection device 10 is configured such that the degree of influence determined by the following equation (1) satisfies the condition of the following equation (2).
Influence degree [%] = (((N1+N3)/(N1+N2))-1)×100...Formula (1)
-7.00[%]<Influence [%]<7.00[%] ...Formula (2)
　Ｎ１は、第１導体部２１を流れる電流に起因した磁気検知部１３における磁束密度である。Ｎ２は、第２導体部２２を流れる電流に起因した磁気検知部１３における磁束密度である。Ｎ３は、第２導体部２２をＸ方向及びＹ方向に１．５ｍｍずつずれた４カ所に移動させたと仮定したときにＮ２との誤差が最大となる磁束密度である。上記４カ所は、具体的には、第２導体部２２をＸ方向の一方側に１．５ｍｍ、Ｙ方向の一方側に１．５ｍｍずらした位置と、第２導体部２２をＸ方向の一方側に１．５ｍｍ、Ｙ方向の他方側に１．５ｍｍずらした位置と、第２導体部２２をＸ方向の他方側に１．５ｍｍ、Ｙ方向の一方側に１．５ｍｍずらした位置と、第２導体部２２をＸ方向の他方側に１．５ｍｍ、Ｙ方向の他方側に１．５ｍｍずらした位置である。磁束密度の算出方法は、上述した通りである。 N1 is the magnetic flux density in the magnetic sensing section 13 caused by the current flowing through the first conductor section 21. N2 is the magnetic flux density in the magnetic sensing section 13 caused by the current flowing through the second conductor section 22. N3 is the magnetic flux density at which the error from N2 is maximum when it is assumed that the second conductor portion 22 is moved to four locations shifted by 1.5 mm in the X direction and the Y direction. Specifically, the above four locations are a position where the second conductor part 22 is shifted by 1.5 mm to one side in the X direction, a position where the second conductor part 22 is shifted by 1.5 mm to one side in the Y direction, and a position where the second conductor part 22 is shifted to one side in the X direction. A position where the second conductor portion 22 is shifted by 1.5 mm to the other side in the X direction and 1.5 mm to the other side in the Y direction, and a position where the second conductor portion 22 is shifted by 1.5 mm to the other side in the This is a position where the second conductor portion 22 is shifted by 1.5 mm to the other side in the X direction and by 1.5 mm to the other side in the Y direction. The method for calculating the magnetic flux density is as described above.
　本実施形態では、複数の第２導体部２２Ａ，２２Ｂが設けられている。このため、Ｎ２は、第２導体部２２Ａ，２２Ｂの各々に起因した磁束密度の合算値である。Ｎ３は、第２導体部２２Ａ，２２Ｂの各々をＸ方向及びＹ方向に１．５ｍｍずつずれた４カ所に移動させたと仮定したときにＮ２との誤差が最大となる磁束密度の合算値である。換言すると、Ｎ３は、合算したときの誤差が最大となる組み合わせでの磁束密度の合算値である。 In this embodiment, a plurality of second conductor portions 22A, 22B are provided. Therefore, N2 is the sum of the magnetic flux densities caused by each of the second conductor portions 22A and 22B. N3 is the sum of magnetic flux densities at which the error from N2 is maximum when it is assumed that each of the second conductor parts 22A and 22B is moved to four locations shifted by 1.5 mm in the X direction and the Y direction. . In other words, N3 is the sum value of the magnetic flux densities in the combination that gives the maximum error when summed.
　この磁気検知装置１０は、磁気検知部１３と第２導体部２２とのＸ方向及びＹ方向の位置関係がそれぞれ想定位置よりも１．５ｍｍずれていたとしても、想定位置と比較した影響度が、－７．００％よりも大きく且つ７．００％よりも小さい範囲内に収まる。したがって、この構成によれば、磁気検知部１３を、第２導体部２２を流れる電流に起因して生じる磁束の影響を受ける位置に置きつつも、磁気検知部１３と第２導体部２２との位置関係のずれに起因した検知誤差の影響を抑えやすい。 In this magnetic sensing device 10, even if the positional relationship between the magnetic sensing section 13 and the second conductor section 22 in the X direction and the Y direction is shifted by 1.5 mm from the assumed position, the degree of influence compared to the assumed position is still small. , -7.00% and less than 7.00%. Therefore, according to this configuration, although the magnetic sensing section 13 is placed in a position where it is affected by the magnetic flux generated due to the current flowing through the second conductor section 22, the magnetic sensing section 13 and the second conductor section 22 are It is easy to suppress the effects of detection errors caused by positional deviations.
　更に、この磁気検知装置１０は、第２導体部２２Ａ，２２Ｂが複数存在する構成においても適用可能である。 Furthermore, this magnetic sensing device 10 is also applicable to a configuration in which a plurality of second conductor portions 22A and 22B exist.
　更に、磁気検知装置１０は、磁気検知部１３とはＺ方向に間隔をあけて配置され、第１導体部２１と第２導体部２２Ａとをつなぐ第１連結導体部２４を備えている。この構成によれば、第１導体部２１と第２導体部２２Ａとが第１連結導体部２４によって繋がれる構成において、磁気検知部１３と第２導体部２２Ａとの位置関係のずれに起因した検知誤差の影響を抑えやすい。 Further, the magnetic sensing device 10 includes a first connecting conductor section 24 that is arranged at a distance from the magnetic sensing section 13 in the Z direction and connects the first conductor section 21 and the second conductor section 22A. According to this configuration, in the configuration in which the first conductor part 21 and the second conductor part 22A are connected by the first connecting conductor part 24, the magnetic detection part 13 and the second conductor part 22A are It is easy to suppress the effects of detection errors.
　また、磁気検知装置１０は、磁気検知部１３とはＺ方向に間隔をあけて配置され、第１導体部２１と第２導体部２２Ｂとをつなぐ第２連結導体部２５を備えている。この構成によれば、第１導体部２１と第２導体部２２Ｂとが第２連結導体部２５によって繋がれる構成において、磁気検知部１３と第２導体部２２Ｂとの位置関係のずれに起因した検知誤差の影響を抑えやすい。 Furthermore, the magnetic sensing device 10 includes a second connecting conductor section 25 that is spaced apart from the magnetic sensing section 13 in the Z direction and connects the first conductor section 21 and the second conductor section 22B. According to this configuration, in the configuration in which the first conductor part 21 and the second conductor part 22B are connected by the second connecting conductor part 25, the magnetic detection part 13 and the second conductor part 22B are It is easy to suppress the effects of detection errors.
　更に、磁気検知装置１０は、第１連結導体部２４を介して、第１導体部２１と第２導体部２２Ａとに同じ電流が流れる。この構成によれば、第１連結導体部２４を介して第１導体部２１と第２導体部２２Ａとに同じ電流が流れる構成において、磁気検知部１３と第２導体部２２Ａとの位置関係のずれに起因した検知誤差の影響を抑えやすい。 Further, in the magnetic sensing device 10, the same current flows through the first conductor portion 21 and the second conductor portion 22A via the first connecting conductor portion 24. According to this configuration, in a configuration in which the same current flows through the first conductor section 21 and the second conductor section 22A via the first connecting conductor section 24, the positional relationship between the magnetic sensing section 13 and the second conductor section 22A is It is easy to suppress the effects of detection errors caused by misalignment.
　また、磁気検知装置１０は、第２連結導体部２５を介して、第１導体部２１と第２導体部２２Ｂとに同じ電流が流れる。この構成によれば、第２連結導体部２５を介して第１導体部２１と第２導体部２２Ｂとに同じ電流が流れる構成において、磁気検知部１３と第２導体部２２Ｂとの位置関係のずれに起因した検知誤差の影響を抑えやすい。 Furthermore, in the magnetic sensing device 10, the same current flows through the first conductor portion 21 and the second conductor portion 22B via the second connecting conductor portion 25. According to this configuration, in a configuration in which the same current flows through the first conductor portion 21 and the second conductor portion 22B via the second connecting conductor portion 25, the positional relationship between the magnetic sensing portion 13 and the second conductor portion 22B is It is easy to suppress the effects of detection errors caused by misalignment.
　＜他の実施形態＞
　本開示は、上記記述及び図面によって説明した実施形態に限定されるものではない。例えば、上述又は後述の実施形態の特徴は、矛盾しない範囲であらゆる組み合わせが可能である。また、上述又は後述の実施形態のいずれの特徴も、必須のものとして明示されていなければ省略することもできる。更に、上述した実施形態は、次のように変更されてもよい。 <Other embodiments>
The present disclosure is not limited to the embodiments described above and illustrated in the drawings. For example, the features of the embodiments described above or below can be combined in any combination without contradicting each other. Furthermore, any feature of the embodiments described above or below may be omitted unless explicitly stated as essential. Furthermore, the embodiment described above may be modified as follows.
　上記実施形態では、第２導体部が、２つ設けられる構成であったが、１つのみ設けられる構成であってもよいし、３つ以上設けられる構成であってもよい。 In the above embodiment, the configuration is such that two second conductor parts are provided, but the configuration may be such that only one second conductor part is provided, or the configuration may be such that three or more second conductor parts are provided.
　上記実施形態では、第１導体部と第２導体部とがつながれた構成であったが、つながれていない構成であってもよい。 In the above embodiment, the first conductor part and the second conductor part are connected, but they may be unconnected.
　上記実施形態では、第１導体部と第２導体部とに同じ電流が流れる構成であったが、異なる電流が流れる構成であってもよい。 In the above embodiment, the same current flows through the first conductor portion and the second conductor portion, but a configuration may be adopted where different currents flow through the first conductor portion and the second conductor portion.
　なお、今回開示された実施の形態は全ての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、今回開示された実施の形態に限定されるものではなく、請求の範囲によって示された範囲内又は請求の範囲と均等の範囲内での全ての変更が含まれることが意図される。 It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered restrictive. The scope of the present invention is not limited to the embodiments disclosed herein, and is intended to include all modifications within the scope indicated by the claims or within the range equivalent to the claims. be done.
１　　　：車両
２　　　：バッテリ
３　　　：負荷
１０　　：磁気検知装置
１１　　：筐体
１２　　：導電路
１３　　：磁気検知部
１４　　：制御部
２１　　：第１導体部
２２　　：第２導体部
２２Ａ　：第２導体部
２２Ｂ　：第２導体部
２４　　：第１連結導体部（連結導体部）
２４Ａ　：第１連結部
２４Ｂ　：第２連結部
２４Ｃ　：第１段差部
２５　　：第２連結導体部（連結導体部）
２５Ａ　：第３連結部
２５Ｂ　：第４連結部
２５Ｃ　：第２段差部
３０　　：ボルト 1: Vehicle 2: Battery 3: Load 10: Magnetic detection device 11: Housing 12: Conductive path 13: Magnetic detection section 14: Control section 21: First conductor section 22: Second conductor section 22A: Second conductor section 22B : Second conductor part 24 : First connecting conductor part (connecting conductor part)
24A: First connecting portion 24B: Second connecting portion 24C: First step portion 25: Second connecting conductor portion (connecting conductor portion)
25A: Third connecting portion 25B: Fourth connecting portion 25C: Second step portion 30: Bolt

Claims (4)

  1. 　車両に設置され、バッテリと負荷との間に設けられる磁気検知装置であって、
    　筐体と、
    　前記筐体内に設けられ、前記バッテリから供給される電力を前記負荷側に供給する導電路と、
    　自身を通る磁束の磁束密度に応じた信号を出力する磁気検知部と、を備え、
    　前記導電路は、
    　前記磁気検知部の検知対象とされ、Ｚ方向に沿って延びる第１導体部と、
    　前記第１導体部に対し前記Ｚ方向に直交する方向に間隔をあけて配置され、前記Ｚ方向に沿って延びる第２導体部と、を有し、
    　前記第１導体部を流れる電流に起因した前記磁気検知部における磁束密度をＮ１とし、
    　前記第２導体部を流れる電流に起因した前記磁気検知部における磁束密度をＮ２とし、
    　前記第２導体部を前記Ｚ方向に直交するＸ方向及びＹ方向に１．５ｍｍずつずれた４カ所に移動させたと仮定したときにＮ２との誤差が最大となる磁束密度をＮ３とした場合に、
    　以下の式（１）によって求められる影響度が、以下の式（２）の条件を満たす磁気検知装置。
    　　　影響度［％］＝（（（Ｎ１＋Ｎ３）／（Ｎ１＋Ｎ２））－１）×１００　・・・式（１）
    　　　－７．００［％］＜影響度［％］＜７．００［％］　・・・式（２）     A magnetic detection device installed in a vehicle between a battery and a load,
    A casing and
    a conductive path provided within the housing and supplying power supplied from the battery to the load side;
    Equipped with a magnetic detection section that outputs a signal according to the magnetic flux density of the magnetic flux passing through it,
    The conductive path is
    a first conductor section that is a detection target of the magnetic detection section and extends along the Z direction;
    a second conductor portion arranged at intervals in a direction perpendicular to the Z direction with respect to the first conductor portion and extending along the Z direction;
    The magnetic flux density in the magnetic sensing section caused by the current flowing through the first conductor section is N1,
    The magnetic flux density in the magnetic sensing part caused by the current flowing through the second conductor part is N2,
    Assuming that the second conductor part is moved to four locations shifted by 1.5 mm in the X direction and Y direction perpendicular to the Z direction, the magnetic flux density at which the error from N2 is maximum is set as N3. ,
    A magnetic sensing device in which the degree of influence determined by the following equation (1) satisfies the condition of the following equation (2).
    Influence degree [%] = (((N1+N3)/(N1+N2))-1)×100...Formula (1)
    -7.00[%]<Influence [%]<7.00[%] ...Formula (2)
  2. 　前記第２導体部は、複数設けられ、
    　Ｎ２は、複数の前記第２導体部の各々に起因した磁束密度の合算値であり、
    　Ｎ３は、複数の前記第２導体部の各々を前記Ｘ方向及び前記Ｙ方向に１．５ｍｍずつずれた４カ所に移動させたと仮定したときにＮ２との誤差が最大となる磁束密度の合算値である請求項１に記載の磁気検知装置。     The second conductor portion is provided in plurality,
    N2 is a total value of magnetic flux densities caused by each of the plurality of second conductor parts,
    N3 is the sum of magnetic flux densities at which the error from N2 is maximum when it is assumed that each of the plurality of second conductor parts is moved to four locations shifted by 1.5 mm in the X direction and the Y direction. The magnetic sensing device according to claim 1.
  3. 　前記磁気検知部とは前記Ｚ方向に間隔をあけて配置され、前記第１導体部と前記第２導体部とをつなぐ連結導体部を備える請求項１又は請求項２に記載の磁気検知装置。 The magnetic sensing device according to claim 1 or 2, wherein the magnetic sensing portion includes a connecting conductor portion that is arranged at intervals in the Z direction and connects the first conductor portion and the second conductor portion.
  4. 　前記連結導体部を介して、前記第１導体部と前記第２導体部とに同じ電流が流れる請求項３に記載の磁気検知装置。 The magnetic sensing device according to claim 3, wherein the same current flows through the first conductor part and the second conductor part via the connecting conductor part.
PCT/JP2022/020164 2022-05-13 2022-05-13 Magnetic detection device WO2023218626A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1151976A (en) * 1997-08-06 1999-02-26 Toyo Commun Equip Co Ltd Photo-current sensor
JP2005061940A (en) * 2003-08-11 2005-03-10 Jfe Steel Kk Method and device for calibrating array-type magnetometric sensor
JP2009276359A (en) * 2009-08-27 2009-11-26 Toyota Motor Corp Current detecting device
JP2013024571A (en) * 2011-07-15 2013-02-04 Sumitomo Wiring Syst Ltd Bus bar
JP2020173152A (en) * 2019-04-10 2020-10-22 Tdk株式会社 Current sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1151976A (en) * 1997-08-06 1999-02-26 Toyo Commun Equip Co Ltd Photo-current sensor
JP2005061940A (en) * 2003-08-11 2005-03-10 Jfe Steel Kk Method and device for calibrating array-type magnetometric sensor
JP2009276359A (en) * 2009-08-27 2009-11-26 Toyota Motor Corp Current detecting device
JP2013024571A (en) * 2011-07-15 2013-02-04 Sumitomo Wiring Syst Ltd Bus bar
JP2020173152A (en) * 2019-04-10 2020-10-22 Tdk株式会社 Current sensor

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