JP2011015192A - Leakage detection device for vehicle - Google Patents

Leakage detection device for vehicle Download PDF

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JP2011015192A
JP2011015192A JP2009157602A JP2009157602A JP2011015192A JP 2011015192 A JP2011015192 A JP 2011015192A JP 2009157602 A JP2009157602 A JP 2009157602A JP 2009157602 A JP2009157602 A JP 2009157602A JP 2011015192 A JP2011015192 A JP 2011015192A
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leakage
vehicle
unit
leakage detection
noise
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Norihiko Kobayashi
紀彦 小林
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Panasonic 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Electric Propulsion And Braking For Vehicles (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a leakage detection device for vehicles which removes a common mode noise generated by a load part or the like when leakage is detected and has high accuracy of leakage detection.SOLUTION: A noise filter part 17 removes the common mode noise which is generated by the load part 13 by being provided between a leakage detection part 16 which detects the leakage during charging in the vehicle and a leakage interruption part 18 which interrupts the leakage. A current detection part 19 of the leakage detection part 16 detects induced current. A microcomputer 20 monitors the induced current which is an output signal from the current detection part 19, determines that it is the leakage when the induced current is equal to or more than a threshold, and operates the leakage interruption part 18.

Description

本発明は、ノイズフィルタ部がコモンモードノイズを除去し、高精度の漏電検知を行う車両用漏電検知装置に関する。   The present invention relates to a vehicle leakage detection device in which a noise filter section removes common mode noise and performs leakage detection with high accuracy.

世界各国において様々な場所に電力供給を目的とした電力線が整備されている。近年では、この電力線を伝送路に用いた電力線搬送通信（Power Line Communication、以下PLCと略す）が様々な状況で利用されている。PLCは、既存の電力線網を利用した通信技術であり、日本国においては50Hzもしくは60Hzの交流電力に通信信号を重畳することで、電力線が敷設されてある場所であれば、双方向通信が可能になるものである。   There are power lines in various countries around the world for the purpose of supplying power. In recent years, power line communication using this power line as a transmission line (Power Line Communication, hereinafter abbreviated as PLC) has been used in various situations. PLC is a communication technology that uses existing power line networks. In Japan, two-way communication is possible where power lines are laid by superimposing communication signals on 50 Hz or 60 Hz AC power. It will be.

図６は、電力線２の漏電を検出する従来のＰＬＣモデム１の機能ブロック図である。制御部３は、信号を電力線２に送信する送信部４と電力線２から信号を受信する受信部５を制御する。漏電検出部６は、コモンモード検出器７が検出したコモンモード電流の値を入力信号として、強度を測定し、デジタルデータの値として、制御部３へ出力する。制御部３は漏電検出部６からの強度値データを時系列に記憶し、現在の強度値と過去の強度値を比較し、信号強度の変化を認識して漏電と判断する。（特許文献１参照）   FIG. 6 is a functional block diagram of a conventional PLC modem 1 that detects a leakage of the power line 2. The control unit 3 controls the transmission unit 4 that transmits signals to the power line 2 and the reception unit 5 that receives signals from the power line 2. The leakage detector 6 measures the intensity using the value of the common mode current detected by the common mode detector 7 as an input signal and outputs the measured value to the controller 3 as a value of digital data. The control unit 3 stores the intensity value data from the leakage detection unit 6 in time series, compares the current intensity value with the past intensity value, recognizes a change in the signal intensity, and determines that it is a leakage. (See Patent Document 1)

特開2008-92238号公報JP 2008-92238 A

一般的な電気回路において、回路を構成する負荷部の金属部の接地が不十分である場合などには大地の間に浮遊容量が形成され、この浮遊容量を介して電流経路が形成される。この大地間のループを流れるノイズをコモンモードノイズと呼ぶ。高速に回路内スイッチのON/OFFを切り替えることで所望の電圧値を出力するスイッチング回路を含む充電器では、接続される電力線には交流電力の周波数よりも高い周波数帯域に渡ってコモンモードノイズが伝送されてしまうという問題があり、特に車両用充電器など接地がされにくい高出力充電器では、回路から発生するノイズも強くかつ広い周波数に渡ることが懸念される。   In a general electric circuit, when the ground of the metal part of the load part constituting the circuit is insufficient, a stray capacitance is formed between the grounds, and a current path is formed through the stray capacitance. This noise flowing through the loop between the grounds is called common mode noise. In a charger that includes a switching circuit that outputs a desired voltage value by switching ON / OFF of an in-circuit switch at high speed, common mode noise is present in the connected power line over a frequency band higher than the frequency of AC power. In particular, in a high-power charger that is not easily grounded, such as a vehicle charger, there is a concern that noise generated from the circuit is strong and spreads over a wide frequency range.

しかしながら、従来のＰＬＣモデムは、コモンモードノイズを考慮して、漏電検出を行っていないので、漏電によるコモンモード電流そのものを検知するのではなく、商用交流電力周波数よりも高い周波数成分からなるコモンモードノイズの影響により、誤って漏電を検出してしまうという課題がある。   However, since the conventional PLC modem does not detect leakage due to common mode noise, it does not detect the common mode current itself due to leakage, but a common mode composed of higher frequency components than the commercial AC power frequency. There is a problem that a leakage current is erroneously detected due to the influence of noise.

本発明は、このような事情に鑑みてなされたものであり、負荷部が原因の漏電を検出する時に、検出したい漏電電流値には影響は与えずに負荷部などが発生するコモンモードノイズを除去することで、漏電検知の精度が高い車両用漏電検知装置を提供することを目的とする。   The present invention has been made in view of such circumstances, and when detecting a leakage caused by a load unit, common mode noise generated by the load unit without affecting the leakage current value to be detected is detected. An object of the present invention is to provide a vehicle leakage detection device with high accuracy of leakage detection by removing the leakage.

本発明に係る車両用充電装置は、漏電を検知する漏電検知部と、この漏電検知部に接続され、負荷部のノイズを除去するノイズフィルタ部と、このノイズフィルタ部に接続され、前記漏電検知部からの漏電検知信号により漏電を遮断する漏電遮断部とを備えたことを特徴とする。   The vehicle charging device according to the present invention includes a leakage detection unit that detects leakage, a noise filter unit that is connected to the leakage detection unit and removes noise from the load unit, and is connected to the noise filter unit, And an earth leakage interrupting section that interrupts the earth leakage by an earth leakage detection signal from the section.

このような車両用漏電検知装置は、漏電検知部と漏電遮断部の間に設けたノイズフィルタ部が、負荷部で発生するノイズを除去するので、漏電検知部が高精度に漏電を検知することができる。   In such a vehicle leakage detection device, since the noise filter unit provided between the leakage detection unit and the leakage blocking unit removes noise generated in the load unit, the leakage detection unit detects leakage with high accuracy. Can do.

本発明の実施の形態１に係る車両用漏電検知装置の構成を示すブロック図1 is a block diagram showing a configuration of a vehicle leakage detection apparatus according to Embodiment 1 of the present invention. 本発明の実施の形態１に係る車両用漏電検知装置の漏電遮断部の通常動作時の構成を示す構成図The block diagram which shows the structure at the time of normal operation | movement of the earth-leakage interrupting part of the earth-leakage detector for vehicles which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る車両用漏電検知装置の漏電遮断部の漏電検知時の構成を示す構成図The block diagram which shows the structure at the time of the earth-leakage detection of the earth-leakage interruption part of the earth-leakage detector for vehicles which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る車両用漏電検知装置のノイズフィルタ部を示す回路図The circuit diagram which shows the noise filter part of the electrical leakage detection apparatus for vehicles which concerns on Embodiment 1 of this invention. 本発明の実施の形態２に係る車両用漏電検知装置の構成を示すブロック図The block diagram which shows the structure of the electric leakage detection apparatus for vehicles which concerns on Embodiment 2 of this invention. 従来の漏電検出部を備えたＰＬＣモデムのブロック図Block diagram of a PLC modem with a conventional leakage detector

以下、本発明に係る車両用漏電検知装置の実施の形態について図面に基づいて説明する。
（実施の形態１）
図１は、本発明の実施の形態１に係る車両用漏電検知装置の構成を示すブロック図である。車両側システム１１の構成は以下の通りである。負荷部13は漏電検知手段１２に接続される。漏電報知部１４は漏電検知手段１２からの信号を入力する。車両ＰＬＣ端末１５は、漏電報知部１４からの信号を入力し、電力線に接続される。漏電検知手段１２は、漏電を検知する漏電検知部１６と、この漏電検知部１６に接続されるノイズフィルタ部１７と、このノイズフィルタ部１７に接続される漏電遮断部１８から構成される。また、漏電検知部１６は、コモン電流を検出する電流検出部１９と、この電流検出部１９に接続されるマイコン２０から構成される。 DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a vehicle leakage detection apparatus according to the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a vehicle leakage detection apparatus according to Embodiment 1 of the present invention. The configuration of the vehicle side system 11 is as follows. The load unit 13 is connected to the leakage detection means 12. The leakage notification unit 14 inputs a signal from the leakage detection means 12. The vehicle PLC terminal 15 receives a signal from the leakage notification unit 14 and is connected to the power line. The leakage detection means 12 includes a leakage detection unit 16 that detects leakage, a noise filter unit 17 connected to the leakage detection unit 16, and a leakage blocking unit 18 connected to the noise filter unit 17. The leakage detection unit 16 includes a current detection unit 19 that detects a common current and a microcomputer 20 that is connected to the current detection unit 19.

宅内側システム３０の構成は、外部送電線変圧器３１を経由し配信される商用電力を、配電盤３２を介して宅内中に電力線網が張り巡らされ、いくつかの箇所で電力線ソケットコンセント３３、３４によって接続口が提供される。宅内PLC端末３５は、コンセント３４に接続される。   The configuration of the in-home system 30 is that commercial power distributed via an external power line transformer 31 is spread through a power line network in the house via a distribution board 32, and power line socket outlets 33, 34 are provided at several points. Provides a connection port. The home PLC terminal 35 is connected to the outlet 34.

次に、本実施の形態１の車両用漏電検知装置の動作について説明する。   Next, the operation of the vehicle leakage detection apparatus of the first embodiment will be described.

車両側システム１１のコンセント２１がソケット３３に接続されると、漏電検知手段１２は、充電中に漏電があるか否かの検知を開始する。漏電検知手段１２のノイズフィルタ部１７は、モーターなどの負荷部１３が発生するコモンモードノイズを除去する。漏電検知部１６の電流検出部１９は、フェライトコアなどで構成され、電力線にコモンモード電流が流れる場合、コア磁束による誘導電流を検出する。マイコン２０は、電流検出部１９からの出力信号である誘導電流を監視し、誘導電流がしきい値以上の場合、漏電であると判断し、漏電遮断部１８を動作させ、負荷部１３へ電流を送らないようにすると共に、漏電報知部１４へ漏電信号を出力する。漏電報知部１４は車両ＰＬＣ端末１５へ信号を出力し、車両ＰＬＣ端末１５は電力線を介して、宅内ＰＬＣ端末３５へ信号を送信する。宅内ＰＬＣ端末３５の保有者は、車両システム１１で漏電が発生したことを知ることができる。なお、宅内PLC端末３５は、必ずしも宅内に設置する必要性は無く、車両外、例えば庭先やガレージのコンセントなどに設置されていてもよく、車両外に漏電が発生したことを通知できれば良い。   When the outlet 21 of the vehicle-side system 11 is connected to the socket 33, the leakage detection means 12 starts detecting whether or not there is a leakage during charging. The noise filter unit 17 of the leakage detecting means 12 removes common mode noise generated by the load unit 13 such as a motor. The current detection unit 19 of the leakage detection unit 16 is configured with a ferrite core or the like, and detects an induced current caused by the core magnetic flux when a common mode current flows through the power line. The microcomputer 20 monitors the induced current, which is an output signal from the current detection unit 19, and if the induced current is equal to or greater than the threshold value, determines that there is a leakage, operates the leakage breaker 18, and supplies the current to the load unit 13. The leakage signal is output to the leakage notification unit 14. Leakage notification unit 14 outputs a signal to vehicle PLC terminal 15, and vehicle PLC terminal 15 transmits the signal to home PLC terminal 35 via the power line. The owner of the home PLC terminal 35 can know that a leakage has occurred in the vehicle system 11. The home PLC terminal 35 is not necessarily installed in the home, and may be installed outside the vehicle, for example, in a garden or a garage outlet, as long as it can notify that a leakage has occurred outside the vehicle.

図２および図３は、車両用漏電検知装置の漏電遮断部１８の構成図である。漏電遮断部１８は、リレースイッチ５０と遮断抵抗５１から構成される。図２に示すように、リレースイッチ５０は、マイコン２０からの信号が無い場合は、端子aと端子c、端子bと端子dが接続されるように動作する。また、図3に示すように、マイコン２０から漏電検知信号を受けた場合には、端子aと端子e、端子bと端子fが接続されるように動作する。従って、図２で示される漏電検知されない通常状態では、ＡＣ電力入力側から負荷部側へ電力が流れ、図３で示される漏電検知された場合は、遮断抵抗５１を経由して電力は電力入力側へ戻り、負荷部側への電力供給は遮断される。このとき、負荷部側への電力供給は遮断されるが、PLCモデム１５には電力が供給されるため、漏電遮断後であっても、PLC通信が可能になる。遮断抵抗５１は例えば１Mオーム程度の大きな抵抗を設定することで、漏電遮断部１８の発熱量を抑えることができる。本実施の形態では、電子信号によるスイッチ切り替えでの遮断機構を例に示したが、スイッチ５０と遮断抵抗５１の代わりに誘導起電力を用いた電磁式バネによるスイッチ遮断方式であっても良く、同様の機能を有するものであれば本構成に限定するものではない。   FIG. 2 and FIG. 3 are block diagrams of the leakage breaker 18 of the vehicle leakage detector. The earth leakage interrupter 18 includes a relay switch 50 and an interrupt resistor 51. As shown in FIG. 2, when there is no signal from the microcomputer 20, the relay switch 50 operates so that the terminal a and the terminal c and the terminal b and the terminal d are connected. Further, as shown in FIG. 3, when a leakage detection signal is received from the microcomputer 20, the terminal a and the terminal e and the terminal b and the terminal f are connected. Therefore, in the normal state where leakage detection is not performed as shown in FIG. 2, power flows from the AC power input side to the load unit side, and when leakage detection is detected as shown in FIG. The power supply to the load unit side is cut off. At this time, power supply to the load unit side is cut off, but since power is supplied to the PLC modem 15, PLC communication is possible even after the leakage is cut off. For example, by setting a large resistance of about 1 M ohm as the breaking resistance 51, the amount of heat generated by the leakage breaker 18 can be suppressed. In the present embodiment, an example of a shut-off mechanism by switch switching by an electronic signal is shown as an example, but a switch shut-off method by an electromagnetic spring using an induced electromotive force instead of the switch 50 and the shut-off resistor 51 may be used. The present invention is not limited to this configuration as long as it has a similar function.

図４は、車両用漏電検知装置のノイズフィルタ部１７の回路図である。ノイズフィルタ部１７は、コモンモードチョークコイル４１と2つのYコンデンサ４２およびコンデンサの放電対策として設置される抵抗器４３から構成される。本回路は異方向に流れる電流(端子aから端子b、端子cから端子dへ流れる電流：ノーマルモード電流)に対してはコモンモードチョークコイル４１に発生する磁束が互いに打ち消しあうため、何も作用しない。しかし、同方向に流れる電流（端子aから端子b、端子dから端子cへ流れる電流：コモンモード電流）に対してはコモンモードチョークコイル４１に発生する磁束が強め合うため、大きなインピーダンスが発生しインダクタとして機能する。そのため、同方向に流れるコモンモードノイズの低減に効果がある。また、Yコンデンサ４２も2つのコンデンサの中間が接地されているため、大地間ループを形成するコモンモードノイズのバイパス効果が得られ、結果として、コモンモードノイズの低減に効果のある回路となる。例えば4700pFのコンデンサをYコンデンサ４２として用いると、回路のインピーダンスを50Ωとした場合、カットオフ周波数がおよそ0.67MHzのローパスフィルタとして機能するため、周波数0.67MHz以上のコモンモードノイズを低減できる。そのため、本構成のノイズフィルタ１７を設置することにより、0.67MHz以上のコモンモードノイズが電力線へ漏洩することを低減できるため、本周波数以上のコモンモードノイズによる漏電誤検知が避けられる、という効果が得られる。   FIG. 4 is a circuit diagram of the noise filter unit 17 of the vehicle leakage detection device. The noise filter unit 17 includes a common mode choke coil 41, two Y capacitors 42, and a resistor 43 that is installed as a countermeasure against discharge of the capacitors. This circuit has no effect on the current flowing in different directions (current flowing from terminal a to terminal b and terminal c to terminal d: normal mode current) because the magnetic fluxes generated in the common mode choke coil 41 cancel each other. do not do. However, since the magnetic flux generated in the common mode choke coil 41 reinforces the current flowing in the same direction (current flowing from the terminal a to the terminal b and from the terminal d to the terminal c: common mode current), a large impedance is generated. Functions as an inductor. This is effective in reducing common mode noise flowing in the same direction. Further, since the Y capacitor 42 is grounded between the two capacitors, a bypass effect of the common mode noise forming a loop between the grounds can be obtained. As a result, the circuit is effective in reducing the common mode noise. For example, when a 4700 pF capacitor is used as the Y capacitor 42, when the impedance of the circuit is 50Ω, it functions as a low-pass filter with a cutoff frequency of about 0.67 MHz, so that common mode noise with a frequency of 0.67 MHz or more can be reduced. For this reason, by installing the noise filter 17 of this configuration, it is possible to reduce leakage of common mode noise of 0.67 MHz or higher to the power line, so that it is possible to avoid erroneous detection of leakage due to common mode noise of this frequency or higher. can get.

コモンモードチョークコイル４１は通常、フェライトコアなどの円形磁性体に巻線をほどこしたものであり、同方向に巻線をした2つのコイルを合わせた形状である。つまりラインチョークコイルを2つ利用することで等価回路となるので、ラインチョークコイルを用いても良い。また、本回路はコモンモードノイズを低減するため、電力線へのコモン電流漏洩低減効果を有し、漏洩電界強度の低減に繋がる。なお、本回路図はノイズフィルタ部１７の一例であり、コンデンサ、コモンモードチョークコイルを少なくとも1つずつ含む回路であって、例えば抵抗器とコンデンサからなるスナバ回路やチップビーズなどノイズを低減する回路、素子を含んでいても良く、同様の機能を有するものであれば本回路図の構成に限定するものではない。   The common mode choke coil 41 is usually formed by winding a circular magnetic body such as a ferrite core, and has a shape in which two coils wound in the same direction are combined. That is, since an equivalent circuit is obtained by using two line choke coils, a line choke coil may be used. Moreover, since this circuit reduces common mode noise, it has an effect of reducing common current leakage to the power line, leading to a reduction in leakage electric field strength. This circuit diagram is an example of the noise filter unit 17 and is a circuit including at least one capacitor and a common mode choke coil, for example, a snubber circuit including a resistor and a capacitor, or a circuit for reducing noise such as chip beads. However, the present invention is not limited to the configuration of this circuit diagram as long as it has the same function.

本実施の形態で説明したように、ノイズフィルタ部１７は負荷部１３を稼動させた場合に発生するノイズを低減し、漏電検知部１６の漏電を検知する精度を高くすることができるという効果が得られる。また、漏電遮断部１８により負荷作動中に発生した漏電を検知後瞬時に給電遮断することで、安全性を高めることができる。また、車両PLC端末１５は車両外に設置される宅内PLC端末３５へ漏電が発生したことを報知することができ、かつ漏電遮断後も車両PLC端末１５には電力が供給され続けるため、PLC通信が継続できるとい
う効果が得られる。 As described in the present embodiment, the noise filter unit 17 has an effect of reducing noise generated when the load unit 13 is operated and increasing the accuracy of detecting the leakage of the leakage detection unit 16. can get. Moreover, safety can be improved by interrupting power supply instantaneously after detection of a leakage occurring during load operation by the leakage breaker 18. In addition, the vehicle PLC terminal 15 can notify the in-home PLC terminal 35 installed outside the vehicle that a leakage has occurred, and power is continuously supplied to the vehicle PLC terminal 15 even after the leakage is interrupted. Can be maintained.

また、上記実施の形態１では、負荷部１３としてモーターを例に挙げて説明を行ったが、ノイズの発生源となる負荷部であればモーターでなくてもノイズフィルタ部１７を接続することにより同様の効果が得られる。例えば、冷蔵庫、エアコン、照明器具などは高ノイズ発生源負荷部として知られているが、ノイズフィルタ部１７によるノイズ低減効果が得られる。
（実施の形態２）
図５は、本発明の実施の形態２に係る車両用漏電検知装置のブロック図であり、図１における漏電検知手段２１以外の構成は同じであるため、図１と同じ構成要素の説明は省略する。図５の漏電検知手段２１の構成を説明する。 In the first embodiment, the motor is used as an example of the load unit 13. However, if the load unit is a noise generation source, the noise filter unit 17 may be connected even if the motor is not a motor. Similar effects can be obtained. For example, a refrigerator, an air conditioner, a lighting fixture, and the like are known as high noise generation source load units, but the noise reduction effect by the noise filter unit 17 can be obtained.
(Embodiment 2)
FIG. 5 is a block diagram of a vehicle leakage detection device according to Embodiment 2 of the present invention. Since the configuration other than leakage detection means 21 in FIG. 1 is the same, description of the same components as those in FIG. 1 is omitted. To do. The structure of the electric leakage detection means 21 of FIG. 5 is demonstrated.

漏電検知手段２１は、漏電検知部１６に接続されるノイズフィルタ部１７と、ノイズフィルタ部１７へ接続される漏電遮断部１８と、漏電遮断部１８へ接続される充電器２２により構成される。負荷部１３は、充電器２２に接続される。   The leakage detection means 21 includes a noise filter unit 17 connected to the leakage detection unit 16, a leakage blocking unit 18 connected to the noise filter unit 17, and a charger 22 connected to the leakage blocking unit 18. The load unit 13 is connected to the charger 22.

次に、本実施の形態２の車両用漏電検知装置の動作を説明する。   Next, the operation of the vehicle leakage detection apparatus of the second embodiment will be described.

車両側システム１１のコンセント２１がソケット３３に接続されると、漏電検知手段２１は、充電中に漏電があるか否かの検知を開始する。スイッチングレギュレータ方式の充電器２２は、AC電力をDCへ変換する整流平滑回路と高速にON/OFF切り替えを実行するスイッチング回路にて、高周波のノイズが発生しやすく、また高電圧を扱う充電器２２では特にそのノイズレベルが大きくなるため、その対策が必要となる。漏電検知手段２１のノイズフィルタ部１７は、モーターなどの負荷部１３や充電器２２が発生するコモンモードノイズを除去する。漏電検知部１６の電流検出部１９は、フェライトコアなどで構成され、電力線にコモンモード電流が流れる場合、コア磁束による誘導電流を検出する。マイコン２０は、電流検出部１９からの出力信号である誘導電流を監視し、誘導電流がしきい値以上の場合、漏電であると判断し、漏電遮断部１８を動作させ、負荷部１３へ電流を送らないようにすると共に、漏電報知部１４へ漏電信号を出力する。漏電報知部１４は車両ＰＬＣ端末１５へ信号を出力し、車両ＰＬＣ端末１５は電力線を介して、宅内ＰＬＣ端末３５へ信号を送付する。宅内ＰＬＣ端末３５の保有者は、車両システム１１で漏電が発生したことを知ることができる。   When the outlet 21 of the vehicle side system 11 is connected to the socket 33, the leakage detection means 21 starts detecting whether or not there is a leakage during charging. The switching regulator type charger 22 is a rectifying / smoothing circuit that converts AC power into DC and a switching circuit that performs high-speed ON / OFF switching, and high-frequency noise is likely to occur, and the charger 22 handles high voltage. However, since the noise level becomes particularly large, countermeasures are required. The noise filter unit 17 of the leakage detection means 21 removes common mode noise generated by the load unit 13 such as a motor and the charger 22. The current detection unit 19 of the leakage detection unit 16 is configured with a ferrite core or the like, and detects an induced current caused by the core magnetic flux when a common mode current flows through the power line. The microcomputer 20 monitors the induced current, which is an output signal from the current detection unit 19, and if the induced current is equal to or greater than the threshold value, determines that there is a leakage, operates the leakage breaker 18, and supplies the current to the load unit 13. The leakage signal is output to the leakage notification unit 14. Leakage notification unit 14 outputs a signal to vehicle PLC terminal 15, and vehicle PLC terminal 15 sends the signal to in-home PLC terminal 35 via the power line. The owner of the home PLC terminal 35 can know that a leakage has occurred in the vehicle system 11.

本実施の形態で説明したように、ノイズフィルタ部１７は負荷部１３や充電器２２を稼動させた場合に発生するノイズを低減し、漏電検知部１６の漏電を検知する精度を高くすることができるという効果が得られる。また、漏電遮断部１８により充電器作動中に発生した漏電を検知後瞬時に給電遮断することで、安全性を高めることができる。また、車両PLC端末１５は車両外に設置される宅内PLC端末３５へ漏電が発生したことを報知することができ、かつ漏電遮断後も車両PLC端末１５には電力が供給され続けるため、PLC通信が継続できるという効果が得られる。   As described in the present embodiment, the noise filter unit 17 can reduce noise generated when the load unit 13 and the charger 22 are operated, and can increase the accuracy of detecting leakage in the leakage detection unit 16. The effect that it can be obtained. In addition, safety can be improved by interrupting power supply instantaneously after detection of leakage occurring during the operation of the charger by the leakage breaker 18. Further, the vehicle PLC terminal 15 can notify the in-home PLC terminal 35 installed outside the vehicle that a leakage has occurred, and power is continuously supplied to the vehicle PLC terminal 15 even after the leakage is interrupted. Can be maintained.

本発明に係る車両用漏電検知装置は、ノイズフィルタ部がコモンモードノイズを除去するので、高精度に漏電を検知でき、車両に搭載される車両用漏電検知装置に適用される。   Since the noise filter unit removes common mode noise, the vehicle leakage detection device according to the present invention can detect leakage with high accuracy and is applied to a vehicle leakage detection device mounted on a vehicle.

１１ 車両側システム
１２、２１ 漏電検知手段
１３ 負荷部
１４ 漏電報知部
１５ 車両ＰＬＣ端末
１６ 漏電検知部
１７ ノイズフィルタ部
１８ 漏電遮断部
２２ 充電器
３５ 宅内ＰＬＣ端末 DESCRIPTION OF SYMBOLS 11 Vehicle side system 12, 21 Earth leakage detection means 13 Load part 14 Earth leakage notification part 15 Vehicle PLC terminal 16 Earth leakage detection part 17 Noise filter part 18 Earth leakage interruption part 22 Battery charger 35 Home PLC terminal

Claims (2)

車両で充電中に漏電を検知する漏電検知部と、この漏電検知部に接続され、負荷部のノイズを除去するノイズフィルタ部と、このノイズフィルタ部に接続され、前記漏電検知部からの漏電検知信号により漏電を遮断する漏電遮断部とを備えた車両用漏電検知装置。   A leakage detection unit that detects leakage during charging in the vehicle, a noise filter unit that is connected to the leakage detection unit and removes noise from the load unit, and is connected to the noise filter unit and detects leakage from the leakage detection unit. An electric leakage detector for a vehicle comprising an electric leakage interrupting unit that interrupts electric leakage by a signal. 前記漏電検知部からの信号を入力する漏電報知部と、この漏電報知部からの信号を入力し、車外のＰＬＣ端末と通信を行う車両ＰＬＣ端末とを備えた請求項１記載の車両用漏電検知装置。
2. The vehicle leakage detection device according to claim 1, further comprising: a leakage notification unit that inputs a signal from the leakage detection unit; and a vehicle PLC terminal that inputs a signal from the leakage notification unit and communicates with a PLC terminal outside the vehicle. apparatus.
JP2009157602A 2009-07-02 2009-07-02 Leakage detection device for vehicle Pending JP2011015192A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5234212B1 (en) * 2012-08-17 2013-07-10 株式会社日立アドバンストデジタル Multiple access communication system and photovoltaic power generation system
DE102013100246A1 (en) * 2013-01-11 2014-07-17 Refusol Gmbh Current sensor and radio noise filter arrangement for use in transformerless photovoltaic inverter of e.g. power plant, has throttles provided with windings whose winding wire is connected around primary conductors by through-holes
RU2636405C2 (en) * 2012-10-04 2017-11-23 Син-Эцу Кемикал Ко., Лтд. Method of producing solar cell
DE102018206686A1 (en) 2017-06-27 2018-12-27 Denso Corporation ELECTRONIC UNIT
CN109753669A (en) * 2017-11-03 2019-05-14 上海汽车集团股份有限公司 A kind of analysis method, device and the electronic equipment of vehicle grounding point interference free performance

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5234212B1 (en) * 2012-08-17 2013-07-10 株式会社日立アドバンストデジタル Multiple access communication system and photovoltaic power generation system
RU2636405C2 (en) * 2012-10-04 2017-11-23 Син-Эцу Кемикал Ко., Лтд. Method of producing solar cell
DE102013100246A1 (en) * 2013-01-11 2014-07-17 Refusol Gmbh Current sensor and radio noise filter arrangement for use in transformerless photovoltaic inverter of e.g. power plant, has throttles provided with windings whose winding wire is connected around primary conductors by through-holes
DE102018206686A1 (en) 2017-06-27 2018-12-27 Denso Corporation ELECTRONIC UNIT
DE102018206686B4 (en) 2017-06-27 2024-06-13 Denso Corporation ELECTRONICS UNIT
CN109753669A (en) * 2017-11-03 2019-05-14 上海汽车集团股份有限公司 A kind of analysis method, device and the electronic equipment of vehicle grounding point interference free performance
CN109753669B (en) * 2017-11-03 2023-05-23 上海汽车集团股份有限公司 Method and device for analyzing anti-interference performance of grounding point of whole vehicle and electronic equipment

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