JPH09274062A - Leak detector - Google Patents

Leak detector

Info

Publication number
JPH09274062A
JPH09274062A JP8085385A JP8538596A JPH09274062A JP H09274062 A JPH09274062 A JP H09274062A JP 8085385 A JP8085385 A JP 8085385A JP 8538596 A JP8538596 A JP 8538596A JP H09274062 A JPH09274062 A JP H09274062A
Authority
JP
Japan
Prior art keywords
voltage
leakage
detection
switches
resistors
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8085385A
Other languages
Japanese (ja)
Inventor
Yoichiro Tsuruta
田 陽 一 郎 鶴
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd, 松下電器産業株式会社 filed Critical Matsushita Electric Ind Co Ltd
Priority to JP8085385A priority Critical patent/JPH09274062A/en
Publication of JPH09274062A publication Critical patent/JPH09274062A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52Testing for short-circuits, leakage current or ground faults
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]

Abstract

PROBLEM TO BE SOLVED: To eliminate measuring errors caused by the fluctuation of a high- voltage DC power-supply voltage value by the floating capacitance of a vehicle. SOLUTION: Protecting resistors 4, 6, 5 and 7 and detecting resistors 10 and 11 are sequentially connected from both end sides of a high-voltage DC power supply 1, respectively, and the connecting parts of two detecting resistors 10 and 11 are earthed to a ground 17. At the same time, switches 8 and 9 are connected in parallel to two protecting resistors 6 and 7 on both sides of the detecting resistors 10 and 11, respectively. The opening and closing of these two switches 8 and 9 are controlled, and voltages Vs1 and Vs2 at both end parts of the detecting resistors 10 and 11 are measured. Thus, leak is judged by a leak detecting part 14. In the leak detecting part 14, a timer 14A, which waits the acceptance of data for specified time after the switching of the switches 8 and 9, is provided.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【発明の属する技術分野】本発明は、電気自動車、電
車、トロリーバス等の直流を動力とする車両等に利用す
る漏電検出装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth leakage detecting device used in vehicles such as electric vehicles, trains, trolleybuses, etc., which are powered by direct current.
【0002】[0002]
【従来の技術】図2は従来のこの種の漏電検出装置の構
成を示している。図2において、1は車両のボディーグ
ランドから分離された複数のバッテリー等からなる高圧
直流電源、2、3は高圧直流電源1のそれぞれプラス端
子、マイナス端子、4、5、6、7は大きい抵抗値を持
つ保護抵抗、8、9は保護抵抗6および7の両端を短絡
/開放するスイッチ、10、11は検出抵抗、12、1
3は増幅器、14は漏電検出部、15は漏電判定を出力
する出力端子、16は絶縁破壊抵抗、17は車両のボデ
ィーグランドである。
2. Description of the Related Art FIG. 2 shows the structure of a conventional leakage detecting device of this type. In FIG. 2, 1 is a high-voltage DC power supply including a plurality of batteries separated from the vehicle body ground, 2 and 3 are positive terminals and negative terminals of the high-voltage DC power supply 1, 4, 5, 6, and 7 are large resistances. Protective resistors with values, 8 and 9 are switches that short-circuit / open both ends of the protective resistors 6 and 7, 10 and 11 are detection resistors, 12, 1
Reference numeral 3 is an amplifier, 14 is a leakage detecting unit, 15 is an output terminal for outputting a leakage determination, 16 is a dielectric breakdown resistance, and 17 is a vehicle body ground.
【0003】次に上記従来例の動作について説明する。
図2において、絶縁破壊が複数のバッテリーで構成され
た高圧直流電源1の中で起きているものとする。この時
の絶縁破壊抵抗の抵抗値をRΩとし、絶縁破壊箇所が高
圧直流電源1の電圧値VM ボルトをV1 ボルトとV2
ルトで分割した点とする。ここで保護抵抗4、5の抵抗
値を630kΩ、スイッチ8、9に接続された保護抵抗
6、7の抵抗値を640kΩ、検出抵抗10、11の抵
抗値を10kΩ、検出抵抗10の両端電圧をV S1、検出
抵抗11の両端電圧をVS2とする。また、以下のように
条件を定義する。 (1)VS1M ,VS2M :スイッチ8および9が開の時の
S1とVS2の検出電圧 (2)VS1P ,VS2P :スイッチ8が閉、スイッチ9が
開の時のVS1とVS2の検出電圧 (3)VS1Q ,VS2Q :スイッチ8が開、スイッチ9が
閉の時のVS1とVS2の検出電圧 (4)PDEF =VS1P −VS2P (5)QDEF =VS1Q −VS2Q (6)PQDEF =PDEF −QDEF
Next, the operation of the above conventional example will be described.
In Figure 2, the dielectric breakdown consists of multiple batteries
It is assumed that it is occurring in the high voltage DC power supply 1. This time
The resistance value of the insulation breakdown resistance of is
Voltage value V of DC power supply 1MBolt to V1Bolt and VTwoBo
The points are divided by the lt. Here, the resistance of the protection resistors 4,
630kΩ value, protection resistor connected to switches 8 and 9
The resistance value of 6 and 7 is 640 kΩ, and the resistance value of the detection resistors 10 and 11 is
The resistance value is 10 kΩ, and the voltage across the detection resistor 10 is V S1,detection
The voltage across resistor 11 is VS2And Also, as below
Define the condition. (1) VS1M, VS2M: When switches 8 and 9 are open
VS1And VS2Detection voltage (2) VS1P, VS2P: Switch 8 is closed and switch 9 is
V when openS1And VS2Detection voltage (3) VS1Q, VS2Q: Switch 8 is open, switch 9 is
V when closedS1And VS2Detection voltage (4) PDEF = VS1P-VS2P (5) QDEF = VS1Q-VS2Q (6) PQDEF= PDEF−QDEF
【0004】次に漏電の検出方法について述べる。スイ
ッチ8および9を以下のように切り替えて検出抵抗1
0、11の両端電圧VS1、VS2を測定する。 (a)スイッチ8とスイッチ9が共に開 (b)スイッチ8が閉、スイッチ9が開 (c)スイッチ8が開、スイッチ9が閉 この3通りの場合における検出抵抗10、11の両端電
圧VS1、VS2から、高圧直流電源1の電圧値VM 、絶縁
破壊抵抗16のR、絶縁破壊箇所の電圧V2 、および漏
電電流Iが次式より求められる。 (7)VM =27 ×VS1M +27 ×VS2M =26 ×VS1P +27 ×VS2P =27 ×VS1Q +26 ×VS2Q (8)R =104 ×(VM −128PQDEF )/3PQDEF (9)V2 =2VM /3−27 ×PDEF /3−R×PDEF /104 =VM /3−27 ×QDEF /3−R×QDEF /104 (10)I=V1 /RまたはI=V2 /R 漏電電流IはV1 とV2 を比較して大きい方を選べば良
い。
Next, a method of detecting electric leakage will be described. Switch the switches 8 and 9 as follows to switch the detection resistor 1
The voltages V S1 and V S2 across 0 and 11 are measured. (A) Both switch 8 and switch 9 are open (b) Switch 8 is closed, switch 9 is open (c) Switch 8 is open, switch 9 is closed Voltage V across detection resistors 10 and 11 in these three cases from S1, V S2, the voltage value V M of the high-voltage DC power source 1, R breakdown resistor 16, the voltage V 2 of the breakdown point, and leakage current I is calculated from the following equation. (7) V M = 2 7 × V S1M +2 7 × V S2M = 2 6 × V S1P +2 7 × V S2P = 2 7 × V S1Q +2 6 × V S2Q (8) R = 10 4 × (V M − 128PQ DEF ) / 3PQ DEF (9) V 2 = 2V M -3-2 7 × P DEF / 3-R × P DEF / 10 4 = V M / 3-2 7 × Q DEF / 3-R × Q DEF / 10 4 (10) I = V 1 / R or I = V 2 / R The leakage current I may be selected by comparing V 1 and V 2 .
【0005】漏電検出部14は、スイッチ8および9の
開、閉を上記した(a)〜(c)のように制御して、そ
の時の検出抵抗10、11の両端電圧VS1とVS2の測定
値から、式(7)〜(10)に従って計算することによ
り、高圧直流電源電圧値、絶縁破壊抵抗値、絶縁破壊箇
所の電圧、漏電電流を求めることができ、この計算結果
から漏電判定を出力端子15へ出力する。
The leakage detection unit 14 controls the opening and closing of the switches 8 and 9 as described in (a) to (c) above, and detects the voltages V S1 and V S2 across the detection resistors 10 and 11 at that time. By calculating according to the equations (7) to (10) from the measured values, it is possible to obtain the high-voltage DC power supply voltage value, the insulation breakdown resistance value, the voltage at the breakdown point, and the leakage current. Output to the output terminal 15.
【0006】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来の漏電検出装置では、例えば電気自動車の場合、高圧
直流電源は図3のように表される。図3において、18
は車両のボディーグランドから分離された複数のバッテ
リー等からなる高圧直流電源、19、20は高圧直流電
源1のそれぞれプラス端子、マイナス端子、21はボデ
ィーグランド、22、23、24は等価的に示した浮遊
容量である。図3に示すように、車両自体が浮遊容量を
持っていることが多いため、検出抵抗10、11に接続
されるスイッチ8、9の状態を、例えばスイッチ8を閉
から開に、スイッチ9を開から閉に同時に切り替えた瞬
間、VS1に値は下がるはずであるが、浮遊容量にはスイ
ッチの状態を切り替える以前の電圧が保持されているた
め、この保持分の放電が済むまで正確なVS1の値を読み
込むことができなくなってしまう。同様にVS2の値は上
がるはずであるが、浮遊容量への充電が済むまで正確な
S2の値を読み込むことができなくなってしまう。この
ため、従来の漏電検出装置では正確な漏電の判定ができ
ないという問題を有していた。また、実走行時において
は、負荷の変動により高圧直流電源電圧値が激しく変動
したり、インバータ制御による負荷モータのノイズや高
圧直流電源からボディーをグランドとする電源をつくる
ためのインバータのノイズ等の影響により、ボディーグ
ランドから見た高圧直流電源電圧が一定の周期で変動し
てしまい、正確な漏電の判定ができないという問題も有
していた。
However, in the above-mentioned conventional leakage detection device, for example, in the case of an electric vehicle, the high voltage DC power supply is represented as shown in FIG. In FIG. 3, 18
Is a high-voltage DC power supply including a plurality of batteries separated from the vehicle body ground, 19 and 20 are positive and negative terminals of the high-voltage DC power supply 1, 21 is a body ground, and 22, 23 and 24 are equivalent. Stray capacitance. As shown in FIG. 3, since the vehicle itself often has a stray capacitance, the states of the switches 8 and 9 connected to the detection resistors 10 and 11 are set to, for example, switch 8 from closed to open, and switch 9 to At the moment of switching from open to closed at the same time, the value should drop to V S1 , but since the voltage before switching the state of the switch is held in the stray capacitance, accurate V is maintained until this holding is completely discharged. The value of S1 cannot be read. Similarly, although the value of V S2 should rise, it becomes impossible to read the accurate value of V S2 until the stray capacitance is charged. For this reason, there is a problem that the conventional leakage detection device cannot accurately determine the leakage. During actual driving, the voltage value of the high-voltage DC power supply fluctuates drastically due to load fluctuations, noise of the load motor due to inverter control, and noise of the inverter used to create a power supply whose body is grounded from the high-voltage DC power supply. Due to the influence, the high-voltage DC power supply voltage viewed from the body ground fluctuates in a constant cycle, and there is also a problem that an accurate leakage determination cannot be performed.
【0007】本発明は、このような従来の問題を解決す
るものであり、漏電判定を正確に行なうことのできる漏
電検出装置を提供することを目的とする。
The present invention solves such a conventional problem, and an object of the present invention is to provide a leakage detecting device capable of accurately determining leakage.
【0008】[0008]
【課題を解決するための手段】本発明は、上記目的を達
成するために、スイッチ切り替え後、VS1、VS2データ
を取り込むまでに待ち時間を設けるタイマー手段を備
え、電圧変動および一定周期のノイズを避けてデータを
読み込むために待ち時間を一定範囲内で変化させてい
き、スイッチの異なる状態で読み込んだデータを漏電検
出部で取捨選択するようにしたものである。したがっ
て、本発明によれば、上記構成を備えることにより、実
車両においても正確な漏電の検出、漏電箇所の検出、お
よび高圧直流電源の電圧値を計算することができる。
In order to achieve the above object, the present invention comprises a timer means for providing a waiting time until the V S1 and V S2 data is fetched after the switch is switched, and is provided with a voltage fluctuation and a constant period. In order to avoid noise and to read data, the waiting time is changed within a certain range, and the data read with different switches are selected by the leakage detection unit. Therefore, according to the present invention, by providing the above configuration, it is possible to accurately detect the leakage, detect the leakage point, and calculate the voltage value of the high-voltage DC power supply even in the actual vehicle.
【0009】[0009]
【発明の実施の形態】本発明の請求項1に記載の発明
は、高圧直流電源の両端側からそれぞれ保護抵抗と検出
抵抗を順番に接続して2つの検出抵抗の接続部をグラン
ドに接地するとともに、それぞれの検出抵抗の両側の2
つの保護抵抗にそれぞれ並列にスイッチを接続し、これ
ら2つのスイッチの開閉を制御して検出抵抗の両端部の
電圧を測定することにより漏電を判定する漏電検出部を
備えた漏電検出装置において、漏電検出部が、スイッチ
を切り替えた後に一定時間だけデータを取り込むのを待
機するタイマー手段を備えたものであり、漏電判定を正
確に行うことができる。
The invention according to claim 1 of the present invention is such that a protection resistor and a detection resistor are sequentially connected from both ends of a high-voltage DC power supply, and a connection portion of two detection resistors is grounded. With 2 on each side of each sensing resistor
In a leakage detection device equipped with a leakage detection unit, in which a switch is connected in parallel to each of the two protection resistors, the opening and closing of these two switches are controlled, and the voltage at both ends of the detection resistor is measured to determine the leakage. The detection unit is provided with a timer unit that waits for the data to be taken in for a certain period of time after the switch is switched, and it is possible to accurately make the leakage determination.
【0010】本発明の請求項2に記載の発明は、請求項
1記載の漏電検出装置において、データを取り込むのを
待機する時間を可変にしたことを特徴とするものであ
り、実走行時における負荷の変動により高圧直流電源電
圧値が変動しても対処することができる。
The invention according to claim 2 of the present invention is characterized in that, in the earth leakage detection device according to claim 1, the time to wait for the data to be fetched is variable, and it is during actual traveling. Even if the high-voltage DC power supply voltage value fluctuates due to the fluctuation of the load, it can be dealt with.
【0011】本発明の請求項3に記載の発明は、請求項
1または2記載の漏電検出装置において、2つのスイッ
チを開成した状態で測定した電圧値を基準値として、ど
ちらか一方を閉成した状態で測定した電圧値が基準値に
対して設定誤差範囲内に入らなかった場合にそれらのデ
ータを無効にすることを特徴とするものであり、漏電判
定をより正確に行うことができる。
According to a third aspect of the present invention, in the leakage detecting device according to the first or second aspect, one of the two switches is closed with the voltage value measured with the two switches opened as a reference value. When the voltage value measured in the above state does not fall within the setting error range with respect to the reference value, those data are invalidated, and the leakage determination can be performed more accurately.
【0012】本発明の請求項4に記載の発明は、請求項
1から3のいずれかに記載の漏電検出装置において、漏
電が複数回連続して検出された場合に初めて漏電と判定
することを特徴とするものであり、漏電判定をより正確
に行うことができる。
According to a fourth aspect of the present invention, in the leakage detecting device according to any one of the first to third aspects, when the leakage is detected a plurality of times consecutively, it is determined that the leakage is the first time. This is a feature, and it is possible to more accurately determine the electric leakage.
【0013】(実施の形態)以下、本発明の実施の形態
について説明する。本実施の形態における漏電検出装置
の構成は図2に示した従来例とほぼ同様であり、異なる
のは、漏電検出部14にタイマー14Aを備えているこ
とと、漏電検出部14に新たに別の機能を追加したこと
である。図1において、1は車両のボディーグランドか
ら分離された複数のバッテリー等からなる高圧直流電
源、2、3は高圧直流電源1のそれぞれプラス端子、マ
イナス端子、4、5、6、7は大きい抵抗値を持つ保護
抵抗、8、9は保護抵抗6および7の両端を短絡/解放
するスイッチ、10、11は検出抵抗、12、13は増
幅器、14は漏電検出部、15は漏電判定を出力する出
力端子、16は絶縁破壊抵抗、17は車両のボディーグ
ランドである。そして14Aは漏電検出部14内に設け
られたタイマーである。
(Embodiment) An embodiment of the present invention will be described below. The configuration of the leakage detecting device according to the present embodiment is almost the same as that of the conventional example shown in FIG. 2, except that the leakage detecting unit 14 is provided with a timer 14A and that the leakage detecting unit 14 is newly provided. Is that the function of is added. In FIG. 1, 1 is a high-voltage DC power supply composed of a plurality of batteries or the like separated from the vehicle body ground, 2 and 3 are positive and negative terminals of the high-voltage DC power supply 1, respectively, and 4, 5, 6, and 7 are large resistances. A protective resistance having a value, 8 and 9 are switches that short-circuit / release both ends of the protective resistances 6 and 7, 10 and 11 are detection resistances, 12 and 13 are amplifiers, 14 is a leakage detection unit, and 15 outputs a leakage judgment. An output terminal, 16 is a dielectric breakdown resistance, and 17 is a vehicle body ground. And 14A is a timer provided in the leakage detection unit 14.
【0014】次に、本実施の形態における動作について
説明する。まず、スイッチの状態がスイッチ8と9が開
の時にVS1M およびVS2M の値を取り込む。その後、ス
イッチの状態をスイッチ8が閉、スイッチ9が開に切り
替える。その後、車両の持つ浮遊容量からの放電および
浮遊容量への充電が終わり、タイマー14Aにより設定
されたVS1P およびVS2P の電圧値が一定値に落ち着く
までの待機時間終了後にVS1P およびVS2P を取り込
む。この待機時間は実験的に定められる。その後、スイ
ッチの状態をスイッチ8が開、スイッチ9が閉に切り替
える。その後、同様に待機時間終了後にVS1Q およびV
S2Q を取り込む。以下同様にスイッチの状態を切り替え
る毎に待機時間をリセットし、この待機時間終了後にV
S1およびV S2の値を取り込んでいくようにする。
Next, the operation in the present embodiment
explain. First of all, the switch status is that switches 8 and 9 are open.
At the time of VS1MAnd VS2MCapture the value of. Then
Switch 8 is closed and switch 9 is open.
Replace. After that, discharge from the stray capacitance of the vehicle and
Charging to the floating capacitance is over, set by timer 14A
The VS1PAnd VS2PVoltage value settles down to a constant value
After the waiting time untilS1PAnd VS2PCapture
No. This waiting time is experimentally determined. After that,
Switch 8 switch to open and switch 9 to closed
I can. After that, similarly after the end of the waiting time, VS1QAnd V
S2QTake in. Switch the state of the switch in the same way
The standby time is reset each time
S1And V S2The value of is taken in.
【0015】このように、本実施の形態によれば、スイ
ッチを切り替えた後に一定時間経過したからデータを取
り込むようにしたので、車両の高圧直流電源とボディー
との間の浮遊容量による測定誤差をなくすことができ、
実車両においても正確な高圧直流電源電圧値、漏電の検
出、絶縁破壊箇所の検出を行なうことができる。
As described above, according to the present embodiment, since the data is taken in after a lapse of a fixed time after the switch is switched, the measurement error due to the stray capacitance between the high voltage DC power supply of the vehicle and the body is eliminated. Can be lost,
Even in an actual vehicle, it is possible to accurately detect a high-voltage DC power supply voltage value, an electric leakage, and a dielectric breakdown point.
【0016】なお、待機時間を一定範囲内で可変できる
ようにしておき、データ取り込みのタイミング毎に変化
させることにより、実走行時における負荷の変動により
高圧直流電源電圧値が変動しても対処することができ
る。
It should be noted that the standby time is made variable within a certain range, and is changed at each data fetching timing, so that the high-voltage DC power supply voltage value fluctuates due to load fluctuations during actual traveling. be able to.
【0017】また、高圧直流電源電圧値は式(7)に示
すように3つの式で表されるので、VS1M およびVS2M
の値を用いて算出したVM 値を基準値とし、VS1P およ
びV S2P を用いて算出したVM 値、またはVS1Q および
S2Q を用いて算出したVM値が、基準値に対して設定
誤差範囲内に入らなかった場合、これら全てのデータを
無効データとして扱い、全て排除することにより、漏電
判定をより正確に行なうことができる。設定誤差範囲内
に入った場合は、これらのデータを有効データとして扱
い、高圧直流電源電圧値、絶縁破壊抵抗値、絶縁破壊箇
所の電圧値を算出する。
The high-voltage DC power supply voltage value is shown in equation (7).
Is expressed by three equations,S1MAnd VS2M
V calculated using the value ofMUsing the value as the reference value, VS1PAnd
And V S2PV calculated usingMValue or VS1Qand
VS2QV calculated usingMValue is set to the reference value
If it does not fall within the error range, all these data are
Leakage caused by treating as invalid data and eliminating all
The determination can be made more accurately. Within the setting error range
If you enter, treat these data as valid data
High voltage DC power supply voltage value, dielectric breakdown resistance value, dielectric breakdown
Calculate the voltage value of the place.
【0018】さらに、漏電判定が複数回連続して初めて
漏電と判定することにより、漏電判定をより正確に行な
うことができる。
Further, the leakage judgment can be made more accurately by determining the leakage only after the leakage judgment is repeated a plurality of times.
【0019】[0019]
【発明の効果】本発明は、上記実施の形態から明らかな
ように、スイッチを切り替えた後に一定時間経過したか
らデータを取り込むようにしたので、車両の高圧直流電
源とボディーとの間の浮遊容量による測定誤差をなくす
ことができ、実車両においても正確な高圧直流電源電圧
値、漏電の検出、絶縁破壊箇所の検出を行なうことがで
きる。
According to the present invention, as is apparent from the above-mentioned embodiment, data is taken in after a lapse of a certain time after switching the switch, so that the stray capacitance between the high voltage DC power supply of the vehicle and the body is obtained. It is possible to eliminate the measurement error due to, and it is possible to accurately detect the voltage value of the high-voltage DC power supply, the leakage current, and the location of the dielectric breakdown even in the actual vehicle.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明の実施の形態における漏電検出装置の概
略回路図
FIG. 1 is a schematic circuit diagram of an earth leakage detection device according to an embodiment of the present invention.
【図2】従来例における漏電検出装置の概略回路図FIG. 2 is a schematic circuit diagram of a leakage detection device in a conventional example.
【図3】実車における高圧直流電源の等価図[Fig. 3] Equivalent diagram of high-voltage DC power supply in actual vehicle
【符号の説明】[Explanation of symbols]
1 高圧直流電源 2 高圧直流電源のプラス端子 3 高圧直流電源のマイナス端子 4、5 保護抵抗 6、7 保護抵抗 8、9 スイッチ 10、11 検出抵抗 12、13 増幅器 14 漏電検出器 14A タイマー 15 漏電判定出力端子 16 絶縁破壊抵抗 17 ボディーグランド 1 High voltage DC power supply 2 Positive terminal of high voltage DC power supply 3 Negative terminal of high voltage DC power supply 4, 5 Protection resistance 6, 7 Protection resistance 8, 9 Switch 10, 11 Detection resistance 12, 13 Amplifier 14 Earth leakage detector 14A Timer 15 Electric leakage judgment Output terminal 16 Dielectric breakdown resistance 17 Body ground

Claims (4)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 高圧直流電源の両端側からそれぞれ保護
    抵抗と検出抵抗を順番に接続して2つの検出抵抗の接続
    部をグランドに接地するとともに、それぞれの検出抵抗
    の両側の2つの保護抵抗にそれぞれ並列にスイッチを接
    続し、これら2つのスイッチの開閉を制御して検出抵抗
    の両端部の電圧を測定することにより漏電を判定する漏
    電検出部を備えた漏電検出装置において、漏電検出部
    が、スイッチを切り替えた後に一定時間だけデータを取
    り込むのを待機するタイマー手段を備えた漏電検出装
    置。
    1. A protection resistor and a detection resistor are sequentially connected from both ends of a high-voltage DC power supply to ground the connection portion of the two detection resistors to ground, and two protection resistors on both sides of each detection resistor are connected. In the leakage detection device including the leakage detection unit that connects the switches in parallel and controls the opening and closing of these two switches to measure the voltage across the detection resistor to determine the leakage, the leakage detection unit is An electric leakage detection device comprising timer means for waiting for data to be taken in for a certain period of time after switching the switch.
  2. 【請求項2】 データを取り込むのを待機する時間を可
    変にしたことを特徴とする請求項1記載の漏電検出装
    置。
    2. The earth leakage detection device according to claim 1, wherein a waiting time for capturing data is variable.
  3. 【請求項3】 2つのスイッチを開成した状態で測定し
    た電圧値を基準値として、どちらか一方を閉成した状態
    で測定した電圧値が基準値に対して設定誤差範囲内に入
    らなかった場合にそれらのデータを無効にすることを特
    徴とする請求項1または2記載の漏電検出装置。
    3. When the voltage value measured with the two switches opened is the reference value, and the voltage value measured with one of the switches closed is not within the setting error range with respect to the reference value. 3. The leakage detection device according to claim 1, wherein the data is invalidated.
  4. 【請求項4】 漏電が複数回連続して検出された場合に
    初めて漏電と判定することを特徴とする請求項1から3
    のいずれかに記載の漏電検出装置。
    4. The leak is first determined when the leak is detected a plurality of times in succession.
    The leakage detection device according to any one of 1.
JP8085385A 1996-04-08 1996-04-08 Leak detector Pending JPH09274062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8085385A JPH09274062A (en) 1996-04-08 1996-04-08 Leak detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8085385A JPH09274062A (en) 1996-04-08 1996-04-08 Leak detector

Publications (1)

Publication Number Publication Date
JPH09274062A true JPH09274062A (en) 1997-10-21

Family

ID=13857283

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8085385A Pending JPH09274062A (en) 1996-04-08 1996-04-08 Leak detector

Country Status (1)

Country Link
JP (1) JPH09274062A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1437600A1 (en) * 2003-01-09 2004-07-14 DaimlerChrysler AG Circuit and method for ground fault detection
WO2008088448A1 (en) * 2006-12-27 2008-07-24 Caterpillar Inc. Systems and methods for electrical leakage detection and compensation
JP2008289234A (en) * 2007-05-16 2008-11-27 Hitachi Vehicle Energy Ltd Cell controller, battery module and power supply system
JP2010019603A (en) * 2008-07-08 2010-01-28 Hitachi Ltd Power supply
EP2322945A2 (en) * 2008-08-11 2011-05-18 LG Chem, Ltd. Apparatus and method for sensing battery leakage current, and battery driving apparatus and battery pack comprising the apparatus
JP2012068023A (en) * 2010-09-21 2012-04-05 Hioki Ee Corp Ground resistance meter
WO2013041929A1 (en) 2011-09-20 2013-03-28 Toyota Jidosha Kabushiki Kaisha Abnormality detection circuit for electric storage unit and abnormality detecting method for electric storage unit
US8624611B2 (en) 2009-01-23 2014-01-07 Convion Oy Arrangement and method for monitoring galvanic isolation of fuel cell device
CN103674454A (en) * 2012-09-24 2014-03-26 微宏动力系统(湖州)有限公司 Battery-pack leakage-liquid detection system
JP2014522628A (en) * 2011-06-01 2014-09-04 コミサリア ア レネルジ アトミク エ オウ エネルジ アルタナティヴ Power supply
US8890365B2 (en) 2008-12-09 2014-11-18 Convion Oy Fuel cell device and method for feeding electrical current to electrical network
CN109228871A (en) * 2017-07-10 2019-01-18 比亚迪股份有限公司 Power supply system of train and its detection of electrical leakage recovery device, method and train
CN109228872A (en) * 2017-07-10 2019-01-18 比亚迪股份有限公司 Power supply system of train and its detection of electrical leakage positioning device, method and train
US10775441B2 (en) 2017-08-29 2020-09-15 Contemporary Amperex Technology Co., Limited Insulation detection circuit, detection method, and battery management system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06308185A (en) * 1993-04-23 1994-11-04 Matsushita Electric Ind Co Ltd Leakage detecting apparatus
JPH07199800A (en) * 1993-12-28 1995-08-04 Suzuki Motor Corp Processor for switch signal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06308185A (en) * 1993-04-23 1994-11-04 Matsushita Electric Ind Co Ltd Leakage detecting apparatus
JPH07199800A (en) * 1993-12-28 1995-08-04 Suzuki Motor Corp Processor for switch signal

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1437600A1 (en) * 2003-01-09 2004-07-14 DaimlerChrysler AG Circuit and method for ground fault detection
US7626396B2 (en) 2006-12-27 2009-12-01 Caterpillar Inc. Systems and methods for electrical leakage detection and compensation
WO2008088448A1 (en) * 2006-12-27 2008-07-24 Caterpillar Inc. Systems and methods for electrical leakage detection and compensation
JP2008289234A (en) * 2007-05-16 2008-11-27 Hitachi Vehicle Energy Ltd Cell controller, battery module and power supply system
JP2010019603A (en) * 2008-07-08 2010-01-28 Hitachi Ltd Power supply
EP2322945A4 (en) * 2008-08-11 2013-10-30 Lg Chemical Ltd Apparatus and method for sensing battery leakage current, and battery driving apparatus and battery pack comprising the apparatus
EP2322945A2 (en) * 2008-08-11 2011-05-18 LG Chem, Ltd. Apparatus and method for sensing battery leakage current, and battery driving apparatus and battery pack comprising the apparatus
US8890365B2 (en) 2008-12-09 2014-11-18 Convion Oy Fuel cell device and method for feeding electrical current to electrical network
US8624611B2 (en) 2009-01-23 2014-01-07 Convion Oy Arrangement and method for monitoring galvanic isolation of fuel cell device
JP2012068023A (en) * 2010-09-21 2012-04-05 Hioki Ee Corp Ground resistance meter
JP2014522628A (en) * 2011-06-01 2014-09-04 コミサリア ア レネルジ アトミク エ オウ エネルジ アルタナティヴ Power supply
WO2013041929A1 (en) 2011-09-20 2013-03-28 Toyota Jidosha Kabushiki Kaisha Abnormality detection circuit for electric storage unit and abnormality detecting method for electric storage unit
CN103674454A (en) * 2012-09-24 2014-03-26 微宏动力系统(湖州)有限公司 Battery-pack leakage-liquid detection system
CN109228871A (en) * 2017-07-10 2019-01-18 比亚迪股份有限公司 Power supply system of train and its detection of electrical leakage recovery device, method and train
CN109228872A (en) * 2017-07-10 2019-01-18 比亚迪股份有限公司 Power supply system of train and its detection of electrical leakage positioning device, method and train
CN109228871B (en) * 2017-07-10 2020-08-07 比亚迪股份有限公司 Train power supply system, leakage detection and recovery device and method thereof, and train
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EP3451005B1 (en) * 2017-08-29 2021-01-20 Contemporary Amperex Technology Co., Limited Insulation detection circuit, detection method, and battery management system

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