JPH0638367A - Rush current preventing circuit - Google Patents
Rush current preventing circuitInfo
- Publication number
- JPH0638367A JPH0638367A JP4213746A JP21374692A JPH0638367A JP H0638367 A JPH0638367 A JP H0638367A JP 4213746 A JP4213746 A JP 4213746A JP 21374692 A JP21374692 A JP 21374692A JP H0638367 A JPH0638367 A JP H0638367A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- relay
- input
- charging
- resistor
- 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
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 238000009499 grossing Methods 0.000 claims abstract description 13
- 230000002265 prevention Effects 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Dc-Dc Converters (AREA)
- Direct Current Feeding And Distribution (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電源供給時の突入電流
から機能素子や機能回路等を保護する突入電流防止回路
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rush current prevention circuit for protecting functional elements, functional circuits and the like from a rush current when power is supplied.
【０００２】[0002]
【従来の技術】実開昭６１−１３８３３４号公報に、電
気自動車の補機バッテリー充電装置が開示されている。
この装置に用いられる突入電流防止回路は、主バッテリ
ーから入力電圧が完全に確立したことを検出し、その検
出出力によって突入電圧防止回路中の遅れ動作回路を始
動することにより、突入電流を防止している。2. Description of the Related Art Japanese Utility Model Laid-Open No. 61-138334 discloses an auxiliary battery charging device for an electric vehicle.
The inrush current prevention circuit used in this device prevents the inrush current by detecting that the input voltage is completely established from the main battery and starting the delay operation circuit in the inrush voltage prevention circuit by the detection output. ing.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記し
た突入電流防止回路は、入力電圧が確立したことを検出
する入力電圧検出回路及び遅れ動作回路を必要とし、回
路構成が複雑となるばかりでなく部品点数も多くなり、
コスト高となる等の問題点がある。本発明は上記した問
題点を解決するためになされたものであり、簡易な回路
構成により安価な突入電流防止回路を提供することを目
的とするものである。However, the above-mentioned inrush current prevention circuit requires an input voltage detection circuit and a delay operation circuit for detecting that the input voltage has been established, which not only complicates the circuit configuration but also makes it possible to reduce the number of parts. More points,
There are problems such as high cost. The present invention has been made to solve the above problems, and an object of the present invention is to provide an inexpensive inrush current prevention circuit with a simple circuit configuration.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
の具体的手段として、機能素子若しくは機能回路等の主
電源回路に、入力リレーと充電抵抗と入力電圧平滑用コ
ンデンサ及び前記充電抵抗を短絡する充電抵抗短絡用リ
レーとを介装し、補助電源により前記入力リレーを作動
し前記充電抵抗及び入力電圧平滑用コンデンサを介する
主電源からの電源供給を所定時間行った後、前記充電抵
抗短絡用リレーを作動するようにした突入電流防止回路
において、前記入力リレーの作動回路に並列結線した前
記充電抵抗短絡用リレーの作動回路に、スイッチングト
ランジスタを介装するとともに、該スイッチングトラン
ジスタのベースと前記入力リレーの作動回路間に抵抗及
びコンデンサとからなる遅延回路を結線したことを特徴
とする突入電流防止回路が提供される。As a concrete means for achieving the above object, a main power supply circuit such as a functional element or a functional circuit is short-circuited with an input relay, a charging resistor, an input voltage smoothing capacitor and the charging resistor. A charging resistance short circuit relay is installed, and the input relay is operated by an auxiliary power source to supply power from the main power source through the charging resistance and the input voltage smoothing capacitor for a predetermined time, and then the charging resistance short circuit is performed. In an inrush current prevention circuit for operating a relay, a switching transistor is provided in the operating circuit of the charging resistor short circuit relay connected in parallel to the operating circuit of the input relay, and the base of the switching transistor and the input Inrush current protection characterized by connecting a delay circuit consisting of a resistor and a capacitor between the relay operating circuits Circuit is provided.
【０００５】[0005]
【作用】上記構成の突入電流防止回路は、補助電源によ
り入力リレーが作動すると、主電源回路が閉成し、充電
抵抗及び入力電圧平滑用コンデンサを介して主電源が供
給される。そして、補助電源により抵抗を介して充電さ
れる遅延回路のコンデンサの電位が上昇して、所定時間
後スイッチングトランジスタを導通させる。これによ
り、充電抵抗短絡用リレーの作動回路が閉成して充電抵
抗が短絡する。In the rush current prevention circuit having the above structure, when the input relay is operated by the auxiliary power source, the main power source circuit is closed and the main power source is supplied via the charging resistor and the input voltage smoothing capacitor. Then, the potential of the capacitor of the delay circuit, which is charged by the auxiliary power source through the resistor, rises, and the switching transistor becomes conductive after a predetermined time. As a result, the operating circuit of the charging resistance short-circuiting relay is closed and the charging resistance is short-circuited.
【０００６】[0006]
【実施例】以下、本発明の突入電流防止回路を電気自動
車の補機バッテリー充電装置に用いた態様で説明する。
図１はその概略回路図である。図１において、１はＤＣ
−ＤＣコンバータ５に電源を供給する主電源回路であ
り、高電圧の主バッテリー２、入力リレー３、充電抵抗
短絡用リレー４及びＤＣ−ＤＣコンバータ５を直列に介
装する。さらに、主電源回路１には充電抵抗短絡用リレ
ー４をバイパスする充電抵抗６を結線し、ＤＣ−ＤＣコ
ンバータ５の入力端子＋ＩＮと−ＩＮ間に入力電圧平滑
用コンデンサ７を介装する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An inrush current prevention circuit according to the present invention will be described below in the form of being used in an auxiliary battery charging device for an electric vehicle.
FIG. 1 is a schematic circuit diagram thereof. In FIG. 1, 1 is DC
A main power supply circuit for supplying power to the DC converter 5, which has a high-voltage main battery 2, an input relay 3, a charging resistance short-circuit relay 4 and a DC-DC converter 5 in series. Further, a charging resistor 6 that bypasses the charging resistor short circuit relay 4 is connected to the main power supply circuit 1, and an input voltage smoothing capacitor 7 is provided between the input terminals + IN and −IN of the DC-DC converter 5.
【０００７】ＤＣ−ＤＣコンバータ５の出力端子間に、
該ＤＣ−ＤＣコンバータ５の負荷である低電圧の補機バ
ッテリー８と、ランプ、ファンモータ等の補機９及びリ
レー作動回路１０を並列に結線する。リレー作動回路１
０には、キースイッチ１１を介装するとともに、前記入
力リレー３の作動回路１２と充電抵抗短絡用リレー４の
作動回路１３を並列に結線する。作動回路１２には、入
力リレー３のリレー接点３ａを吸引する励磁コイル３ｂ
と定電圧ダイオード１４を直列に介装する。また、作動
回路１３には、充電抵抗短絡用リレー４のリレー接点４
ａを吸引する励磁コイル４ｂとＭＯＳＦＥＴからなるス
イッチングトランジスタ１５を直列に介装する。Between the output terminals of the DC-DC converter 5,
A low-voltage auxiliary battery 8 as a load of the DC-DC converter 5, an auxiliary device 9 such as a lamp and a fan motor, and a relay operating circuit 10 are connected in parallel. Relay operating circuit 1
A key switch 11 is connected to 0, and an operating circuit 12 of the input relay 3 and an operating circuit 13 of the charging resistor short circuit relay 4 are connected in parallel. The operating circuit 12 includes an exciting coil 3b for attracting the relay contact 3a of the input relay 3.
And the constant voltage diode 14 are connected in series. Further, the operating circuit 13 includes a relay contact 4 of the charging resistance short-circuiting relay 4.
An exciting coil 4b for attracting a and a switching transistor 15 composed of a MOSFET are interposed in series.
【０００８】そして、抵抗１６とコンデンサ１７を直列
に結線した遅延回路１８を、前記定電圧ダイオード１４
をバイパスさせて作動回路１２に結線する。遅延回路１
８の抵抗１６とコンデンサ１７間と、前記スイッチング
トランジスタ１５のベースとを結線する。さらに、遅延
回路１８には抵抗１９を結線する。その他、２０，２１
はフライホイールダイオードである。尚、キースイッチ
１１をオフしたときコンデンサ１７の電荷は、抵抗１６
及び抵抗１９を介して放電される。The delay circuit 18 in which the resistor 16 and the capacitor 17 are connected in series is connected to the constant voltage diode 14
Is bypassed and connected to the operating circuit 12. Delay circuit 1
8 is connected between the resistor 16 and the capacitor 17, and the base of the switching transistor 15. Further, a resistor 19 is connected to the delay circuit 18. Others 20, 21
Is a flywheel diode. When the key switch 11 is turned off, the electric charge of the capacitor 17 is
And is discharged through the resistor 19.
【０００９】上記実施例の作動を説明する。キースイッ
チ１１を投入すると、まずリレー作動回路１０の中の作
動回路１２が閉成される。入力リレー３には、補機バッ
テリー８の電圧ＶBと定電圧ダイオード１４のツェナー
電圧ＶZとの差である(ＶB−ＶZ)の電圧が印加される。
その結果、入力リレー３が作動してリレー接点３ａが励
磁コイル３ｂに吸引される。入力リレー３が作動すると
により、主バッテリー２→リレー接点３ａ→充電抵抗６
→ＤＣ−ＤＣコンバータ５の入力端子＋ＩＮ→入力電圧
平滑用コンデンサ７→ＤＣ−ＤＣコンバータ５の入力端
子−ＩＮの主電源回路１が閉成され、小電流による入力
電圧平滑用コンデンサ７の充電が開始される。The operation of the above embodiment will be described. When the key switch 11 is turned on, the operation circuit 12 in the relay operation circuit 10 is first closed. A voltage of (V B −V Z ) which is the difference between the voltage V B of the auxiliary battery 8 and the Zener voltage V Z of the constant voltage diode 14 is applied to the input relay 3.
As a result, the input relay 3 operates and the relay contact 3a is attracted to the exciting coil 3b. When the input relay 3 operates, the main battery 2 → relay contact 3a → charging resistor 6
→ DC-DC converter 5 input terminal + IN → input voltage smoothing capacitor 7 → DC-DC converter 5 input terminal -IN main power supply circuit 1 is closed, and input voltage smoothing capacitor 7 is charged by a small current. Be started.
【００１０】また、作動回路１２の閉成により遅延回路
１８のコンデンサ１７は、励磁コイル３ｂ及び抵抗１６
を流れる電流により充電され、次第に電位が上昇する。
コンデンサ１７の電位が上昇してスイッチングトランジ
スタ１５のスレッシュホールド電圧に達すると、スイッ
チングトランジスタ１５が導通し作動回路１３が閉成す
る。その結果、充電抵抗短絡用リレー４が作動して、リ
レー接点４ａが励磁コイル４ｂに吸引され、充電抵抗６
が短絡される。充電抵抗６の短絡により、主バッテリー
２の高電圧がＤＣ−ＤＣコンバータ５の入力端子＋ＩＮ
と−ＩＮ間に印加される。Further, due to the closing of the operating circuit 12, the capacitor 17 of the delay circuit 18 becomes the exciting coil 3b and the resistor 16.
It is charged by the current flowing through it and the potential gradually rises.
When the potential of the capacitor 17 rises and reaches the threshold voltage of the switching transistor 15, the switching transistor 15 becomes conductive and the operating circuit 13 is closed. As a result, the charging resistor short circuit relay 4 operates, the relay contact 4a is attracted to the exciting coil 4b, and the charging resistor 6a
Are short-circuited. Due to the short circuit of the charging resistor 6, the high voltage of the main battery 2 causes the input terminal + IN of the DC-DC converter 5 to rise.
And -IN.
【００１１】尚、前記スイッチングトランジスタ１５の
導通のタイミングは、充電抵抗６を介する入力電圧平滑
用コンデンサ７の充電が完了した後のタイミングとなる
ように、遅延回路１８の時定数を調整する。The time constant of the delay circuit 18 is adjusted so that the conduction timing of the switching transistor 15 is the timing after the charging of the input voltage smoothing capacitor 7 via the charging resistor 6 is completed.
【００１２】上記のように入力電圧平滑用コンデンサ７
の充電完了後に、主バッテリー２の高電圧がＤＣ−ＤＣ
コンバータ５の入力端子＋ＩＮと−ＩＮ間に印加される
から、始動時の過大な突入電流の発生が防止できる。従
って、突入電流によるリレー接点の溶着や入力ヒューズ
(図示せず)の溶断、入力コンデンサの劣化等の不具合を
防止できる。また、遅延回路１８のコンデンサ１７は、
入力リレー３の作動回路１２が閉成したとき、励磁コイ
ル３ｂに流れる電流により充電される。このため、入力
リレー３の作動後に充電抵抗短絡用リレー４が作動する
ことになり、この作動順序が逆になることはない。As described above, the input voltage smoothing capacitor 7
After the completion of charging, the high voltage of the main battery 2 becomes DC-DC.
Since it is applied between the input terminals + IN and -IN of the converter 5, it is possible to prevent the generation of an excessive inrush current at the time of starting. Therefore, welding of relay contacts due to inrush current and input fuse
It is possible to prevent problems such as fusing (not shown) and deterioration of the input capacitor. Further, the capacitor 17 of the delay circuit 18 is
When the operating circuit 12 of the input relay 3 is closed, it is charged by the current flowing through the exciting coil 3b. Therefore, the charging resistor short circuit relay 4 is activated after the input relay 3 is activated, and the operation sequence is not reversed.
【００１３】図２図示の回路は、入力リレー３と充電抵
抗短絡用リレー４との間の結線を変えたもので、構成及
び作動は図１図示の前記実施例と異なるところはない。
また、図３に示すようにキースイッチ１１のオフ時、コ
ンデンサ１７の電荷の放電スピードを高めるため、遅延
回路１８の抵抗１６をバイパスするダイオード２２を結
線することもできる。The circuit shown in FIG. 2 is different from the embodiment shown in FIG. 1 in that the connection between the input relay 3 and the charging resistance short circuit relay 4 is changed.
Further, as shown in FIG. 3, when the key switch 11 is off, the diode 22 bypassing the resistor 16 of the delay circuit 18 can be connected in order to increase the discharging speed of the electric charge of the capacitor 17.
【００１４】[0014]
【発明の効果】本発明の突入電流防止回路は上記したよ
うに、遅延回路とスイッチングトランジスタとを用い
て、入力リレーの作動後に充電抵抗短絡用リレーを作動
させるようにして突入電流を防止するようにしたから、
回路構成が簡易となり安価に提供できる等の優れた効果
がある。As described above, the inrush current prevention circuit of the present invention uses the delay circuit and the switching transistor to activate the charging resistor short circuit relay after the input relay is activated to prevent the inrush current. Because I chose
There are excellent effects such as a simple circuit configuration and low cost.
【図１】本発明の突入電流防止回路を用いた電気自動車
の補機バッテリー充電装置の概略回路図である。FIG. 1 is a schematic circuit diagram of an auxiliary battery charging device for an electric vehicle using the inrush current prevention circuit of the present invention.
【図２】変形実施例を示す概略回路図である。FIG. 2 is a schematic circuit diagram showing a modified example.
【図３】遅延回路の変形例を示す回路図である。FIG. 3 is a circuit diagram showing a modified example of a delay circuit.
１...主電源回路 ２...主バッテリー ３...入力リレ
ー ４...充電抵抗短絡用リレー ５...ＤＣ−ＤＣコン
バータ ６...充電抵抗 ７...入力電圧平滑用コンデン
サ ８...補機バッテリー ９...補機 １０...リレー
作動回路 １２，１３...作動回路 １５...スイッチン
グトランジスタ １６...抵抗 １７...コンデンサ １
８...遅延回路1 ... Main power supply circuit 2 ... Main battery 3 ... Input relay 4 ... Charging resistance short circuit relay 5 ... DC-DC converter 6 ... Charging resistance 7 ... Input voltage smoothing Capacitor 8 ... Auxiliary machine battery 9 ... Auxiliary machine 10 ... Relay operating circuit 12,13 ... Operating circuit 15 ... Switching transistor 16 ... Resistance 17 ... Capacitor 1
8 ... Delay circuit
Claims (1)
路に、入力リレーと充電抵抗と入力電圧平滑用コンデン
サ及び前記充電抵抗を短絡する充電抵抗短絡用リレーと
を介装し、補助電源により前記入力リレーを作動し前記
充電抵抗及び入力電圧平滑用コンデンサを介する主電源
からの電源供給を所定時間行った後、前記充電抵抗短絡
用リレーを作動するようにした突入電流防止回路におい
て、 前記入力リレーの作動回路に並列結線した前記充電抵抗
短絡用リレーの作動回路に、スイッチングトランジスタ
を介装するとともに、該スイッチングトランジスタのベ
ースと前記入力リレーの作動回路間に抵抗及びコンデン
サとからなる遅延回路を結線したことを特徴とする突入
電流防止回路。1. A main power supply circuit such as a functional element or a functional circuit is provided with an input relay, a charging resistor, an input voltage smoothing capacitor, and a charging resistor short circuit relay for short-circuiting the charging resistor. In the inrush current prevention circuit, which activates the input relay and supplies the power from the main power source through the charging resistor and the input voltage smoothing capacitor for a predetermined time, and then activates the charging resistor short circuit relay. A switching circuit is interposed in the operating circuit of the charging resistor short circuit relay connected in parallel with the operating circuit of the above, and a delay circuit consisting of a resistor and a capacitor is connected between the base of the switching transistor and the operating circuit of the input relay. The inrush current prevention circuit characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4213746A JPH0638367A (en) | 1992-07-17 | 1992-07-17 | Rush current preventing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4213746A JPH0638367A (en) | 1992-07-17 | 1992-07-17 | Rush current preventing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0638367A true JPH0638367A (en) | 1994-02-10 |
Family
ID=16644335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4213746A Pending JPH0638367A (en) | 1992-07-17 | 1992-07-17 | Rush current preventing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638367A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100744387B1 (en) * | 2005-03-29 | 2007-07-30 | 미츠비시 후소 트럭 앤드 버스 코포레이션 | Voltage converting circuit for electric vehicle |
| JP2009058483A (en) * | 2007-09-03 | 2009-03-19 | Hitachi Chem Co Ltd | Method and sensor for detecting substance adsorption |
| JP2009201266A (en) * | 2008-02-21 | 2009-09-03 | Sanyo Electric Co Ltd | Car power source apparatus |
| CN102711306A (en) * | 2012-06-14 | 2012-10-03 | 矽力杰半导体技术(杭州)有限公司 | Impact current eliminating circuit |
| JP2013038871A (en) * | 2011-08-05 | 2013-02-21 | Sanyo Electric Co Ltd | Switching device |
| JP2014158367A (en) * | 2013-02-15 | 2014-08-28 | Japan Radio Co Ltd | Dc power feeding system |
| JP2015208068A (en) * | 2014-04-18 | 2015-11-19 | ユニキャリア株式会社 | Industrial vehicle |
| JP2016032190A (en) * | 2014-07-29 | 2016-03-07 | ニチコン株式会社 | Switch device |
-
1992
- 1992-07-17 JP JP4213746A patent/JPH0638367A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100744387B1 (en) * | 2005-03-29 | 2007-07-30 | 미츠비시 후소 트럭 앤드 버스 코포레이션 | Voltage converting circuit for electric vehicle |
| JP2009058483A (en) * | 2007-09-03 | 2009-03-19 | Hitachi Chem Co Ltd | Method and sensor for detecting substance adsorption |
| JP2009201266A (en) * | 2008-02-21 | 2009-09-03 | Sanyo Electric Co Ltd | Car power source apparatus |
| JP2013038871A (en) * | 2011-08-05 | 2013-02-21 | Sanyo Electric Co Ltd | Switching device |
| CN102711306A (en) * | 2012-06-14 | 2012-10-03 | 矽力杰半导体技术(杭州)有限公司 | Impact current eliminating circuit |
| JP2014158367A (en) * | 2013-02-15 | 2014-08-28 | Japan Radio Co Ltd | Dc power feeding system |
| JP2015208068A (en) * | 2014-04-18 | 2015-11-19 | ユニキャリア株式会社 | Industrial vehicle |
| JP2016032190A (en) * | 2014-07-29 | 2016-03-07 | ニチコン株式会社 | Switch device |
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