JP5695196B2 - 電流センサ用基板及び電流センサ - Google Patents
電流センサ用基板及び電流センサ Download PDFInfo
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- JP5695196B2 JP5695196B2 JP2013523835A JP2013523835A JP5695196B2 JP 5695196 B2 JP5695196 B2 JP 5695196B2 JP 2013523835 A JP2013523835 A JP 2013523835A JP 2013523835 A JP2013523835 A JP 2013523835A JP 5695196 B2 JP5695196 B2 JP 5695196B2
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- 239000000758 substrate Substances 0.000 title claims description 19
- 239000004020 conductor Substances 0.000 claims description 39
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 230000004907 flux Effects 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910000673 Indium arsenide Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical compound [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 description 1
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
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- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
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Description
本発明の第4の態様は、第3の態様において、前記磁電変換素子は、平面視において前記電流経路の前記U字形の内側に配置された化合物半導体磁気センサであるようにしてもよい。
本発明の第5の態様は、第3又は4の態様において、前記磁電変換素子は、ホール素子であるようにしてもよい。
本発明の第6の態様は、第3から5のいずれかの態様において、前記第1の支持部には段差が設けられ、前記磁電変換素子は前記段差に配置されているようにしてもよい。
本発明の第7の態様は、第3から6のいずれかの態様において、前記電流センサ用基板の前記支持部には段差が設けられており、前記磁電変換素子の感磁面は、前記一次導体の高さと略等しくなるように設けられているようにしてもよい。
本発明の第8の態様は、第3から7のいずれかの態様において、前記第1の支持部には段差が設けられており、前記段差は前記磁電変換素子の感磁面の高さを低くする方向の段差であるようにしてもよい。
(第1の実施形態)
図2に、第1の実施形態に係る電流センサを示す。電流センサ200は、U字形の電流経路210A及び一次導体端子210Bを有する一次導体210と、ホール素子等の磁電変換素子230Aを支持するための支持部220A、及びリード端子220B_1,220B_2を有する信号端子側部材220(以下、単に「部材220」と略記する。)と、支持部220Aに配置された、電流経路210Aを流れる電流から生じる磁束を検出する磁電変換素子230Aを有するICチップ230とを備える。一次導体210、部材220、及びICチップ230を樹脂240でモールドして、電流センサ200が形成される。ICチップ230及び樹脂240を除いた部分が電流センサ用基板である。
リード端子220B_1は支持部220Aに接続されているリード端子を表し、リード端子220B_2は支持部220Aに接続されていないリード端子を表してある。なお、リード端子220B_1,220B_2に共通の説明では各リード端子が単にリード端子220Bとして参照される。
支持部220Aは、被測定電流が流れるU字形の電流経路210Aに電気的に接続されておらず、このように構成することによって、一次導体210とICチップ230との間の高い絶縁耐圧を確保することができる。
支持部220Aとリード端子220B_1とは、別個の部材ではなく、金属材で一体形成されている。すなわち、支持部220Aとリード端子220B_1とは物理的に一体となっており、物理的にも電気的にも接続されている。
図3に、第2の実施形態に係る電流センサを示す。電流センサ300が第1の実施形態の電流センサ200と異なるのは、ホール素子等の磁電変換素子330AがICチップ330に含まれておらず、別個に設けられている点である。
図5Aは平面図、図5Bは正面図、図5Cは右側面図である。
210 一次導体
210A 電流経路
210B 一次導体端子
210C 開口部
220 信号端子側部材
220A 支持部
220A’第1の支持部
220A” 第2の支持部
220B,220B_1,220B_2 リード端子
230 ICチップ
230A 磁電変換素子
330 ICチップ
330A 磁電変換素子
Claims (8)
- 被測定電流が流れるU字形の電流経路を有する一次導体と、
前記U字形の開口部に配置される、磁電変換素子を支持するための支持部と、
前記支持部に接続するリード端子と、を備え、
前記支持部は、前記U字形の電流経路と電気的に接続せず、かつ前記U字形の前記開口部に配置された第1の支持部と、前記第1の支持部に隣接し、かつ前記開口部に配置されていない第2の支持部と
を有することを特徴とする電流センサ用基板。 - 前記一次導体は、前記U字形の電流経路に接続する一次導体端子を有し、
前記一次導体端子は、前記電流経路の前記U字形の開口方向とは逆方向に延在しており、
前記リード端子は、前記一次導体端子が延在する方向とは逆方向に延在することを特徴とする請求項1に記載の電流センサ用基板。 - 請求項1又は2に記載の電流センサ用基板と、
前記電流センサ用基板の前記第1の支持部に配置された、前記電流センサ用基板の前記電流経路を流れる電流から生じる磁束を検出する磁電変換素子と、
前記電流センサ用基板の前記第2の支持部に配置された、前記磁電変換素子からの出力信号を処理するためのICチップと
を備えることを特徴とする電流センサ。 - 前記磁電変換素子は、平面視において前記電流経路の前記U字形の内側に配置された化合物半導体磁気センサであることを特徴とする請求項3に記載の電流センサ。
- 前記磁電変換素子は、ホール素子であることを特徴とする請求項3又は4に記載の電流センサ。
- 前記第1の支持部には段差が設けられ、前記磁電変換素子は前記段差に配置されていることを特徴とする請求項3〜5のいずれか一項に記載の電流センサ。
- 前記磁電変換素子の感磁面は、前記一次導体の高さと略等しくなるように設けられていることを特徴とする請求項3〜6のいずれか一項に記載の電流センサ。
- 前記電流センサ用基板の前記第1の支持部には段差が設けられており、前記段差は前記磁電変換素子の感磁面の高さを低くする方向の段差であることを特徴とする請求項3から7のいずれか一項に記載の電流センサ。
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