JP2007202320A - Current detector, and power converter for rail-car using the same - Google Patents

Current detector, and power converter for rail-car using the same Download PDF

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JP2007202320A
JP2007202320A JP2006018641A JP2006018641A JP2007202320A JP 2007202320 A JP2007202320 A JP 2007202320A JP 2006018641 A JP2006018641 A JP 2006018641A JP 2006018641 A JP2006018641 A JP 2006018641A JP 2007202320 A JP2007202320 A JP 2007202320A
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current detector
current
power converter
railway vehicle
main circuit
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Satoru Kurosawa
悟 黒澤
Hideyuki Shimizu
秀幸 清水
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Toshiba Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Abstract

<P>PROBLEM TO BE SOLVED: To provide a current detector in which influence of noise is reduced and which need not be increased in size, and a power converter for a rail-car using the same. <P>SOLUTION: The current detector comprises a current detecting means 1 which is fitted to a main circuit wiring and can detect current; and a shielding means 5 for reducing noises provided to the current detecting means which is vulnerable to the influence of noise, when the current detector is influenced by the noise from the main circuit wiring 2a fitted with the current detecting means or from the main circuit wiring 2b of other phase, in which the shielding means is grounded. The power converter for a rail-car uses this current detector. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、電流検出器及びそれを用いた鉄道車両用電力変換装置に関する。 The present invention relates to a current detector and a railway vehicle power converter using the current detector.

従来の電流検出器について図を参照し詳細に説明する。図６（ａ）は、電流検出器の正面図である。図６（ｂ）は、電流検出器の右側面図である。図６（ｃ）は、図６（ａ）のＡ−Ａ断面図である。図７は、電流検出器と主回路配線の構成図である。図８は、鉄道車両用電力変換装置の構成図である。   A conventional current detector will be described in detail with reference to the drawings. FIG. 6A is a front view of the current detector. FIG. 6B is a right side view of the current detector. FIG.6 (c) is AA sectional drawing of Fig.6 (a). FIG. 7 is a configuration diagram of the current detector and the main circuit wiring. FIG. 8 is a block diagram of a railway vehicle power converter.

従来の電流検出器は、図８に示すように鉄道車両用電力変換装置の筐体に接続されている。従来の電流検出器は、電流検出手段１と、コネクタ１１から主に構成される。電流検出手段１は、主回路配線を内部に貫通させるための孔を有し、上方側は直方体形状で下方側は半円形状となっており、電流値の検出が可能に構成されている。電流検出手段１の内部の基板には、オペアンプ３が設けら信号を増幅する。電流検出手段１に接続されたコネクタ１１は、シールド線を介して電力変換装置の制御部と接続され、電力変換装置の制御部に出力信号を出力する。（図６参照）。従来の電流検出器は、主回路配線を電流検出手段１の孔に貫通させ、電力変換装置の筐体フレーム４と接続することにより電力変換装置内に固定される（図７参照）。   A conventional current detector is connected to a casing of a railway vehicle power converter as shown in FIG. The conventional current detector is mainly composed of a current detection means 1 and a connector 11. The current detection means 1 has a hole for penetrating the main circuit wiring inside, has a rectangular parallelepiped shape on the upper side and a semicircular shape on the lower side, and is configured to detect a current value. An operational amplifier 3 is provided on the substrate inside the current detection means 1 to amplify the signal. The connector 11 connected to the current detection unit 1 is connected to the control unit of the power conversion device via the shield line, and outputs an output signal to the control unit of the power conversion device. (See FIG. 6). The conventional current detector is fixed in the power converter by passing the main circuit wiring through the hole of the current detector 1 and connecting it to the housing frame 4 of the power converter (see FIG. 7).

このように構成された従来の電流検出器は、主回路配線に流れる電流の電流値を検知し、電力変換装置の制御部に電流値を出力することが出来た。
特開平０２−３０３３６２号公報 The conventional current detector configured as described above can detect the current value of the current flowing through the main circuit wiring and output the current value to the control unit of the power converter.
Japanese Patent Laid-Open No. 02-303362

しかしながら、従来の電流検出器の取り付け構造は、主回路の配線インダクタンスを低減させるべく、主回路配線２ａの近傍に主回路配線２ｂを併走させるため、電流検出手段１が主回路配線２ｂのノイズの影響を受け、検出波形にノイズが乗りやすく、電力変換装置の制御部が、実際は正常な電流値であるにも関わらず、ノイズの影響で電流値が跳ね上がり過電流と判断し、保護動作をしてしまう場合があった。   However, the conventional current detector mounting structure causes the main circuit wiring 2b to run in the vicinity of the main circuit wiring 2a in order to reduce the wiring inductance of the main circuit. The detection waveform is easily affected by noise, and the control unit of the power converter determines that the current value jumps up due to the noise even though it is actually a normal current value, and performs a protective operation. There was a case.

他相のノイズの影響を低減させるためには、コンデンサやバリスタ等のフィルタ類を電流検出器と電力変換装置の制御部との間に設ける方法も考えられるが、この方法の場合、電力変換装置の重量や寸法が大幅に増加してしまうので、近年小型軽量化を求められる鉄道車両用電力変換装置に採用することは出来ない。   In order to reduce the influence of noise of other phases, a method of providing filters such as capacitors and varistors between the current detector and the control unit of the power converter is also conceivable. In this method, the power converter Therefore, it cannot be used for a railway vehicle power conversion device that is required to be smaller and lighter in recent years.

そこで、本発明は、ノイズの影響を軽減しかつ装置を大型化する必要のない電流検出器及びそれを用いた鉄道車両用電力変換装置を提供することを目的とする。   Therefore, an object of the present invention is to provide a current detector that reduces the influence of noise and does not require an increase in the size of the apparatus, and a power conversion apparatus for a railway vehicle using the current detector.

上記課題は、主回路配線に取り付けられ電流を検出可能な電流検出手段と、前記電流検出手段が、前記電流検出手段に取り付けられている前記主回路配線又は他相の主回路配線から、前記電流検出手段がノイズの影響を受けないように、前記電流検出手段にノイズを軽減する遮蔽手段を設け、前記遮蔽手段は接地されていることにより達成することが出来る。 The problem is that current detection means attached to a main circuit wiring and capable of detecting a current, and the current detection means from the main circuit wiring attached to the current detection means or the main circuit wiring of another phase, the current This can be achieved by providing the current detection means with shielding means for reducing noise so that the detection means is not affected by noise, and the shielding means is grounded.

上記課題は、第１の主回路配線に取り付けられ電流を検出可能な第１の電流検出手段と、
第２の主回路配線に取り付けられ電流を検出可能な第２の電流検出手段と、少なくとも前記第１の電流検出手段と前記第２の電流検出手段のどちらかに、前記第１及び前記第２の主回路配線又は第３の主回路配線から、ノイズの影響を受けないように、ノイズを軽減する遮蔽手段を設け、前記遮蔽手段は接地されていることによって達成することが出来る。 The above-described problem includes first current detection means attached to the first main circuit wiring and capable of detecting current,
A second current detection means attached to a second main circuit wiring and capable of detecting a current; and at least one of the first current detection means and the second current detection means; This can be achieved by providing shielding means for reducing noise so that the main circuit wiring or the third main circuit wiring is not affected by noise, and the shielding means is grounded.

本発明により、ノイズの影響を軽減しかつ装置を大型化する必要のない電流検出器及びそれを用いた鉄道車両用電力変換装置を提供することができる。 INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a current detector that reduces the influence of noise and does not require an increase in the size of a device, and a railway vehicle power conversion device using the current detector.

（第１の実施の形態）
本発明に基づく第１の実施の形態の電流検出器及びそれを用いた鉄道車両用電力変換装置について図を参照し詳細に説明する。図１は、本発明に基づく第１の実施の形態の電流検出器の構成図である。図２は、本発明に基づく第１の実施の形態の電流検出器と筐体フレームの接続形態の一例である。図３は、本発明に基づく第１の実施の形態の電流検出器と筐体フレームの接続形態の一例である。 (First embodiment)
A current detector according to a first embodiment of the present invention and a railway vehicle power converter using the same will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram of a current detector according to a first embodiment based on the present invention. FIG. 2 is an example of a connection form between the current detector and the housing frame according to the first embodiment of the present invention. FIG. 3 is an example of a connection form between the current detector and the housing frame according to the first embodiment of the present invention.

本発明に基づく第１の実施の形態の電流検出器を用いた電力変換装置では、主回路配線を内部に貫通する２つの電流検出器（第１、第２の電流検出器）とが並べられ、ひとつの筐体フレーム４に接続される構成となっており、２つの電流検出器の間に他相の主回路配線２ｂが配置されている。 In the power converter using the current detector according to the first embodiment of the present invention, two current detectors (first and second current detectors) penetrating the main circuit wiring are arranged. The main circuit wiring 2b of the other phase is arranged between the two current detectors.

本発明に基づく第１の実施の形態の電流検出器は、電流検出手段１と、コネクタ１１と、遮蔽手段５から主に構成される。   The current detector according to the first embodiment of the present invention is mainly composed of a current detection means 1, a connector 11, and a shielding means 5.

このように構成された電流検出器において、電流検出手段１は、主回路配線を内部に貫通させるための孔を中央に有し、上方側は直方体形状で下方側に半円が突き出た形状となっており、電流値の検出が可能に構成されている。電流検出手段１の内部の基板には、オペアンプ３が設けられ信号を増幅する。 In the current detector configured as described above, the current detection means 1 has a hole in the center for penetrating the main circuit wiring inside, a shape in which the upper side is a rectangular parallelepiped shape and a semicircle protrudes to the lower side. The current value can be detected. An operational amplifier 3 is provided on the substrate inside the current detection means 1 to amplify the signal.

このように構成された電流検出器においてコネクタ１１は、電流検出手段１の上方側に設けられ、信号線７（シールド線）を介して電力変換装置の制御部と接続される。コネクタ１１は、信号線７を介して電力変換装置の制御部に電流検出値を出力する（図１参照）。 In the current detector configured as described above, the connector 11 is provided on the upper side of the current detection means 1 and is connected to the control unit of the power converter via the signal line 7 (shield line). The connector 11 outputs a current detection value to the control unit of the power conversion device via the signal line 7 (see FIG. 1).

このように構成された電流検出器において、遮蔽手段であるアルミ製の遮蔽板５は、電流検出手段１ｂの内部に設けられ主回路配線２ｂの影響を受けやすいオペアンプ３の周囲に設けられている。本実施の形態の電流検出器においては、主回路配線２ｂが電流検出手段１ｂの左下を通っているので、遮蔽手段５は、電流検出手段の下面、左側面、前面、後面に設け設置されてる。尚、遮蔽板の材料としては、アルミ、銅、鉄が考えられる。 In the current detector thus configured, the aluminum shielding plate 5 as the shielding means is provided around the operational amplifier 3 which is provided inside the current detection means 1b and is easily influenced by the main circuit wiring 2b. . In the current detector of the present embodiment, since the main circuit wiring 2b passes through the lower left of the current detection means 1b, the shielding means 5 is provided and installed on the lower surface, left side surface, front surface, and rear surface of the current detection means. . In addition, aluminum, copper, and iron can be considered as the material of the shielding plate.

このように構成された電流検出器は、主回路配線２ｂによるノイズの影響を受けやすい電流検出手段１ｂのオペアンプ３の近傍、すなわち下面、左側面、前面、後面にノイズの遮蔽板５を設け接地したため、ノイズの影響を軽減することができる。しかも遮蔽板５を設けただけであるので、従来の電流検出器に必要であったフィルタ回路等の部品が不要となり、装置を複雑化する必要がない。 The current detector configured in this way is provided with a noise shielding plate 5 in the vicinity of the operational amplifier 3 of the current detection means 1b that is susceptible to noise by the main circuit wiring 2b, that is, the lower surface, the left side surface, the front surface, and the rear surface. Therefore, the influence of noise can be reduced. In addition, since only the shielding plate 5 is provided, parts such as a filter circuit necessary for the conventional current detector are not required, and the apparatus need not be complicated.

このように構成された電流検出器は、主回路配線に流れる電流の電流値を適切に検知し、電力変換装置の制御部に電流値を出力することが出来る。 The current detector configured as described above can appropriately detect the current value of the current flowing through the main circuit wiring and output the current value to the control unit of the power converter.

次に、筐体フレーム４と電流検出手段１との接地方法について説明する。電流検出手段１と筐体フレーム４との接地方法としては、図２に記載しているように遮蔽板５を電流検出手段１の取付ネジ６にて筐体フレーム４に接地する方法と、図３に記載しているように電流検出手段１を筐体フレーム４と接続した後に遮蔽板５とコネクタ１１と接続される信号線７の接地線８を接続する方法が考えられる。   Next, a method for grounding the housing frame 4 and the current detection means 1 will be described. As a method for grounding the current detection means 1 and the housing frame 4, as shown in FIG. 2, a method of grounding the shielding plate 5 to the housing frame 4 with the mounting screw 6 of the current detection means 1, 3, a method of connecting the grounding wire 8 of the signal wire 7 connected to the shielding plate 5 and the connector 11 after connecting the current detecting means 1 to the housing frame 4 is conceivable.

尚、本実施の形態の電流検出器において、遮蔽手段としては、遮蔽板５と記載したが、アルミテープ（鉄板テープ、銅板テープ）でもノイズの遮断効果を得ることが可能である。   In the current detector of the present embodiment, the shielding means 5 is described as the shielding means, but it is possible to obtain a noise shielding effect even with an aluminum tape (iron plate tape, copper plate tape).

アルミテープの場合は、電流検出手段に貼り付けることが出来、更に通常の板部材よりも大幅に軽いため、遮蔽手段としては好ましい。 In the case of an aluminum tape, it can be affixed to the current detection means, and is much lighter than a normal plate member, so it is preferable as a shielding means.

（第２の実施の形態）
本発明に基づく第２の実施の形態の電流検出器及びそれを用いた鉄道車両用電力変換装置について、図を参照し詳細に説明する。尚、図１乃至図３に記載したものと同一の構造のものについては、同符号を付して説明を省略する。 (Second Embodiment)
A current detector according to a second embodiment of the present invention and a railway vehicle power converter using the same will be described in detail with reference to the drawings. In addition, about the thing of the same structure as what was described in FIG. 1 thru | or FIG. 3, the same code | symbol is attached | subjected and description is abbreviate | omitted.

本発明に基づく第２の実施の形態の電流検出器は、直方体形状の遮蔽箱５ａに電流検出器を内蔵したことを特徴のひとつとしている（図４参照）。図４に記載のものでは、２つの電流検出器を同じ遮蔽箱５ａに入れ、他の主回路配線を遮蔽箱の外に通しているが、電流検出器をそれぞれひとつの遮蔽箱５ａに入れても良い。   The current detector according to the second embodiment of the present invention is characterized in that the current detector is built in the rectangular parallelepiped shielding box 5a (see FIG. 4). In the case shown in FIG. 4, two current detectors are put in the same shielding box 5a and other main circuit wirings are passed outside the shielding box. However, each current detector is put in one shielding box 5a. Also good.

このように構成された電流検出器及びそれを用いた鉄道車両用電力変換装置は、ノイズの影響を軽減しかつ装置を大型化することを防止することが出来る。   The current detector configured as described above and the railway vehicle power converter using the current detector can reduce the influence of noise and prevent the apparatus from being enlarged.

本実施の形態の電流検出器及びそれを用いた鉄道車両用電力変換装置は、電流検出手段そのものを遮蔽箱５ａにて覆うため、第１の実施の形態の電流検出器及びそれを用いた鉄道車両用電力変換装置よりも、ノイズの遮蔽性能が高くなる。   The current detector according to the present embodiment and the railroad vehicle power conversion apparatus using the current detector cover the current detection means itself with the shielding box 5a, so that the current detector according to the first embodiment and the railroad using the current detector are used. Noise shielding performance is higher than that of a vehicle power converter.

また、本実施の形態の電流検出器では、遮蔽箱５にて電流検出器を覆っているが、電流検出手段１の外部にシール遮蔽材料として導電塗料を塗布し、導電塗料を筐体接地電位とし、ノイズの影響を低減するという構成でも良い。   In the current detector of the present embodiment, the current detector is covered by the shielding box 5, but a conductive paint is applied as a seal shielding material to the outside of the current detection means 1, and the conductive paint is applied to the housing ground potential. It is also possible to adopt a configuration that reduces the influence of noise.

（第３の実施の形態）
本発明に基づく第３の実施の形態の電流検出器及びそれを用いた鉄道車両用電力変換装置について、図を参照し詳細に説明する。尚、図１乃至図４に記載したものと同一の構造のものについては、同符号を付して説明を省略する。 (Third embodiment)
A current detector according to a third embodiment of the present invention and a railway vehicle power converter using the same will be described in detail with reference to the drawings. In addition, about the thing of the same structure as what was described in FIG. 1 thru | or FIG. 4, the same code | symbol is attached | subjected and description is abbreviate | omitted.

本発明に基づく第３の実施の形態の電流検出器は、電流検出手段１のケース９をモールド構造として、モールド内遮蔽材１０を接地電位として、電流検出手段の外部とモールド内接地電位を容易に接続できる構造としたことを特徴としている。   In the current detector according to the third embodiment of the present invention, the case 9 of the current detecting means 1 has a mold structure, the in-mold shielding member 10 has a ground potential, and the outside of the current detecting means and the in-mold ground potential can be easily obtained. It is characterized by having a structure that can be connected to.

このように構成された電流検出器及びそれを用いた鉄道車両用電力変換装置は、ノイズの影響を軽減しかつ装置を大型化することを防止することが出来る。 The current detector configured as described above and the railway vehicle power converter using the current detector can reduce the influence of noise and prevent the apparatus from being enlarged.

本実施の形態の電流検出器及びそれを用いた鉄道車両用電力変換装置は、電流検出手段そのものを遮蔽材１０にて覆うため、第１の実施の形態の電流検出器及びそれを用いた鉄道車両用電力変換装置よりも、ノイズの遮蔽性能が高くなる。   Since the current detector according to the present embodiment and the power conversion apparatus for a railway vehicle using the same cover the current detection means itself with the shielding material 10, the current detector according to the first embodiment and the railway using the current detector. Noise shielding performance is higher than that of a vehicle power converter.

本発明に基づく第１の実施の形態の電流検出器の構成図である。It is a block diagram of the current detector of 1st Embodiment based on this invention. 本発明に基づく第１の実施の形態の電流検出器と筐体フレームの接続形態の一例である。It is an example of the connection form of the electric current detector and housing | casing frame of 1st Embodiment based on this invention. 本発明に基づく第１の実施の形態の電流検出器と筐体フレームの接続形態の一例である。It is an example of the connection form of the electric current detector and housing | casing frame of 1st Embodiment based on this invention. 本発明に基づく第２の実施の形態の電流検出器の構成図である。It is a block diagram of the current detector of 2nd Embodiment based on this invention. 本発明に基づく第３の実施の形態の電流検出器の構成図である。It is a block diagram of the current detector of 3rd Embodiment based on this invention. 従来の電流検出器の構成図である。It is a block diagram of the conventional current detector. 従来の電流検出器の構成図である。It is a block diagram of the conventional current detector. 鉄道車両用電力変換装置の構成図である。It is a block diagram of the power converter device for rail vehicles.

符号の説明Explanation of symbols

１ 電流検出手段
２ａ 主回路配線
２ｂ 併走された他相の主回路配線
３ オペアンプ
４ 電力変換装置の筐体フレーム
５ 遮蔽手段
６ 電流検出器取付ネジ
７ 電流検出器信号線（シールド線）
８ 接地線
９ 電流検出器ケース
１０ 電流検出器ケース遮蔽材
１１ 電流検出器のコネクタ DESCRIPTION OF SYMBOLS 1 Current detection means 2a Main circuit wiring 2b The main circuit wiring of the other phase side-by-side 3 Operational amplifier 4 Housing frame of power converter 5 Shielding means 6 Current detector mounting screw 7 Current detector signal line (shield line)
8 Grounding wire 9 Current detector case 10 Current detector case shielding material 11 Current detector connector

Claims (8)

主回路配線に取り付けられ電流を検出可能な電流検出手段と、
前記電流検出手段が、前記電流検出手段に取り付けられている前記主回路配線又は他相の主回路配線から、前記電流検出手段がノイズの影響を受けないように、前記電流検出手段にノイズを軽減する遮蔽手段を設け、前記遮蔽手段は接地されていることを特徴とする電流検出器及びそれを用いた鉄道車両用電力変換装置。 Current detection means attached to the main circuit wiring and capable of detecting current;
The current detection means reduces noise to the current detection means so that the current detection means is not affected by noise from the main circuit wiring attached to the current detection means or the main circuit wiring of another phase. A current detector, and a power conversion apparatus for a railway vehicle using the current detector, wherein the shielding means is grounded. 前記請求項１記載の電流検出器及びそれを用いた鉄道車両用電力変換装置において、
前記電流検出手段は、信号を増幅させるオペアンプを有し、
前記遮蔽手段は、前記電流検出手段の前記オペアンプの周囲に設けられていることを特徴とする電流検出器及びそれを用いた鉄道車両用電力変換装置。 In the current detector according to claim 1 and a railway vehicle power converter using the current detector,
The current detection means has an operational amplifier for amplifying a signal,
The shield means is provided around the operational amplifier of the current detection means, and a current detector and a railway vehicle power converter using the current detector. 前記請求項１及び請求項２記載の電流検出器及びそれを用いた鉄道車両用電力変換装置において、前記遮蔽手段はアルミ板であることを特徴とする電流検出器及びそれを用いた鉄道車両用電力変換装置。   3. The current detector according to claim 1 and claim 2 and a railway vehicle power converter using the current detector, wherein the shielding means is an aluminum plate, and a railway vehicle using the current detector. Power conversion device. 前記請求項１及び請求項２記載の電流検出器及びそれを用いた鉄道車両用電力変換装置において、前記遮蔽手段は、電流検出器を収納できる箱形状をしていることを特徴とする電流検出器及びそれを用いた鉄道車両用電力変換装置。   3. The current detector according to claim 1, wherein the shielding means has a box shape that can accommodate the current detector. And a railway vehicle power converter using the same. 前記請求項１及び請求項２記載の電流検出器及びそれを用いた鉄道車両用電力変換装置において、前記遮蔽手段はテープであることを特徴とする電流検出器及びそれを用いた鉄道車両用電力変換装置。   3. The current detector according to claim 1 and claim 2 and a railway vehicle power converter using the current detector, wherein the shielding means is a tape and the railway vehicle power using the current detector. Conversion device. 前記請求項１及び請求項２記載の電流検出器及びそれを用いた鉄道車両用電力変換装置において、前記遮蔽手段は導電塗料であることを特徴とする電流検出器及びそれを用いた鉄道車両用電力変換装置。   3. The current detector according to claim 1 and claim 2 and a power conversion apparatus for a railway vehicle using the current detector, wherein the shielding means is a conductive paint, and for a railway vehicle using the current detector. Power conversion device. 前記請求項１及び請求項２記載の電流検出器及びそれを用いた鉄道車両用電力変換装置において、前記遮蔽手段は、前記電流検出器のケース内に設けられたことを特徴とする電流検出器及びそれを用いた鉄道車両用電力変換装置。   3. The current detector according to claim 1 and claim 2 and a railway vehicle power converter using the current detector, wherein the shielding means is provided in a case of the current detector. And a railway vehicle power converter using the same. 第１の主回路配線に取り付けられ電流を検出可能な第１の電流検出手段と、
第２の主回路配線に取り付けられ電流を検出可能な第２の電流検出手段と、
少なくとも前記第１の電流検出手段と前記第２の電流検出手段のどちらかに、前記第１及び前記第２の主回路配線又は第３の主回路配線から、ノイズの影響を受けないように、ノイズを軽減する遮蔽手段を設け、前記遮蔽手段は接地されていることを特徴とする電流検出器及びそれを用いた鉄道車両用電力変換装置。 First current detection means attached to the first main circuit wiring and capable of detecting current;
Second current detection means attached to the second main circuit wiring and capable of detecting current;
At least one of the first current detection unit and the second current detection unit is not affected by noise from the first and second main circuit wirings or the third main circuit wirings. A current detector provided with shielding means for reducing noise, and the shielding means is grounded, and a railway vehicle power converter using the current detector.
JP2006018641A 2006-01-27 2006-01-27 Current detector, and power converter for rail-car using the same Pending JP2007202320A (en)

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JPH01130597A (en) * 1987-11-17 1989-05-23 Sanyo Electric Co Ltd Substrate positioning equipment
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Publication number Priority date Publication date Assignee Title
EP2546660A1 (en) * 2011-07-13 2013-01-16 LEM Intellectual Property SA Electrical current sensor with grounded magnetic core
WO2013008205A3 (en) * 2011-07-13 2013-03-07 Lem Intellectual Property S.A. Electrical current sensor with grounded magnetic core
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