JPH05313766A - Power introducing circuit - Google Patents

Power introducing circuit

Info

Publication number
JPH05313766A
JPH05313766A JP11785192A JP11785192A JPH05313766A JP H05313766 A JPH05313766 A JP H05313766A JP 11785192 A JP11785192 A JP 11785192A JP 11785192 A JP11785192 A JP 11785192A JP H05313766 A JPH05313766 A JP H05313766A
Authority
JP
Japan
Prior art keywords
voltage
power supply
unit
internal power
power source
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.)
Withdrawn
Application number
JP11785192A
Other languages
Japanese (ja)
Inventor
Riyuuji Kayayama
隆二 萱山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP11785192A priority Critical patent/JPH05313766A/en
Publication of JPH05313766A publication Critical patent/JPH05313766A/en
Withdrawn legal-status Critical Current

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  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

PURPOSE:To prevent the operation error of already prepared units due to the power noise at the time of unit insertion/extraction without using coils in power introducing parts of units and independently of capacitance components of units with respect to power introducing circuits mounted on units of an electronic device consisting of plural insertable/extractable units. CONSTITUTION:This power introducing circuit is provided with a voltage rise rate setting part 1 which outputs a set voltage Vs which rises up to an external supply voltage Vo at a prescribed speed at the time of connection to an external constant voltage power source, a comparator 2 which compares the set voltage Vs of the voltage rise rate setting part 1 and an internal supply voltage Vu of a unit internal power source with each other, and an internal power source control part 3 which is connected between the external constant voltage power source and the unit internal power source and controls the current flowing to the unit internal power source based on an output Vc of the comparator 2 so that the internal power source voltage Vu is equal to the set voltage Vs, and this circuit is provided in the unit.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、挿抜可能な複数のユニ
ットから構成される電子装置のユニットに実装される電
源導入回路に関する。このような電子装置では、装置の
電源を切ることなくユニットの増設や交換を行う場合が
あり、その際のユニット挿抜時に他の既設ユニットの誤
動作を防止する機能を電源導入回路に持たせる必要があ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply introducing circuit mounted in a unit of an electronic device composed of a plurality of units which can be inserted and removed. In such an electronic device, a unit may be added or replaced without turning off the power of the device, and it is necessary to provide the power supply introduction circuit with a function of preventing malfunction of other existing units at the time of inserting / removing the unit. is there.

【0002】[0002]

【従来の技術】通常、大型の電子装置は複数のユニット
(プリント板パッケージ)をシェルフやラックに実装し
て構成される。装置には共通の電源部が設けられてお
り、ユニットをラックに挿入することによって、ユニッ
ト内部電源系が装置の共通電源部に接続されて電力の供
給を受ける。
2. Description of the Related Art Generally, a large electronic device is constructed by mounting a plurality of units (printed board packages) on a shelf or a rack. The device is provided with a common power supply unit, and by inserting the unit into the rack, the unit internal power supply system is connected to the common power supply unit of the device to receive power supply.

【0003】従来の電子装置では、図3に示す如く、電
源コネクタ41、アースコネクタ42の直後のユニットの電
源導入部に、コイル51, コンデンサ52、抵抗53とからな
るノイズフィルタ5を設けた電源導入回路が用いられて
いた。このノイズフルタ5は、他のユニットが挿抜され
るときに発生する装置電源側の電源ノイズ、特に他のユ
ニットが挿入されたときに該他のユニットの内部電源系
のキャパシタンス成分への突入電流により発生する電源
ノイズをカットする。また、ノイズフイルタのコイルの
インダクタンス成分により、自ユニットが挿入されたと
きの突入電流を抑圧することで、装置電源に発生する電
源ノイズを防止するようになっている。
In a conventional electronic device, as shown in FIG. 3, a power source is provided with a noise filter 5 including a coil 51, a capacitor 52 and a resistor 53 at a power source introducing portion of a unit immediately after a power source connector 41 and a ground connector 42. An introductory circuit was used. This noise filter 5 is generated by power supply noise on the power supply side of the device which occurs when another unit is inserted or removed, and in particular due to an inrush current to the capacitance component of the internal power supply system of the other unit when the other unit is inserted. Turn off the power noise. Further, the inductance component of the coil of the noise filter suppresses the inrush current when the self unit is inserted, so that the power source noise generated in the power source of the apparatus is prevented.

【0004】[0004]

【発明が解決しようとする課題】ノイズフィルタを使用
する上記従来の方法では、ユニット内電源系のキャパシ
タンス成分が大きくなった場合にも所定のノイズ抑圧性
能を維持するためには、コイルのインダクタンスをキャ
パシタンス成分の増加に見合って増加させる必要があ
る。しかし、近時のユニットの高機能化、高密度実装化
に対処するため、コイルを出来だけ小さくしたいという
要望があり、キャパシタンス成分の増加に対応してイン
ダクタンス成分を増加できず、ノイズ防止性能が低下し
ているという問題が発生してきている。
In the above-mentioned conventional method using the noise filter, in order to maintain the predetermined noise suppression performance even when the capacitance component of the power supply system in the unit becomes large, the inductance of the coil is changed. It is necessary to increase in proportion to the increase in capacitance component. However, there is a demand to make the coil as small as possible in order to cope with the recent high functionality and high density mounting of the unit, and the inductance component cannot be increased in response to the increase of the capacitance component, and the noise prevention performance is improved. The problem of decreasing is occurring.

【0005】本発明は上記問題点に鑑み創出されたもの
で、ユニットの電源導入部にコイルを使用することな
く、またユニットのキャパシタンス成分の大小には無関
係にユニット挿抜時の電源ノイズによる既設ユニットの
動作エラーを防止できる電源導入回路を提供することを
目的とする。
The present invention has been made in view of the above problems, and does not use a coil in the power source introduction portion of the unit, and is independent of the magnitude of the capacitance component of the unit regardless of the magnitude of the capacitance component of the unit. It is an object of the present invention to provide a power supply introducing circuit capable of preventing the operation error of

【0006】[0006]

【課題を解決するための手段】図1は、本発明の電源導
入回路の原理図である。上記問題点は、図1 に示すよう
に、外部定電圧電源とユニット内部電源との間に設けら
れる電源導入回路であって、外部定電圧電源に接続され
たときに外部電源電圧Voまで所定の速度で上昇する設定
電圧Vsを出力する電圧上昇率設定部1と、該電圧上昇率
設定部1の設定電圧Vsとユニット内部電源の内部電源電
圧Vuとを比較する比較器2と、外部定電圧電源とユニッ
ト内部電源との間に接続され、該比較器2の出力Vcに基
づいて、内部電源電圧Vuが設定電圧Vsに等しくなるよう
にユニット内部電源に流入する電流を制御する内部電源
制御部3とからなり、ユニット内に設けられていること
を特徴とする本発明の電源導入回路により解決される。
FIG. 1 is a principle diagram of a power supply introducing circuit according to the present invention. As shown in Fig. 1, the above problem is the power supply introduction circuit that is provided between the external constant voltage power supply and the unit internal power supply. A voltage rise rate setting unit 1 that outputs a set voltage Vs that rises at a speed, a comparator 2 that compares the set voltage Vs of the voltage rise rate setting unit 1 with the internal power supply voltage Vu of the unit internal power supply, and an external constant voltage. An internal power supply control unit that is connected between the power supply and the unit internal power supply, and controls the current flowing into the unit internal power supply so that the internal power supply voltage Vu becomes equal to the set voltage Vs based on the output Vc of the comparator 2. It is solved by the power supply introducing circuit of the present invention, which is characterized in that it is provided in the unit.

【0007】[0007]

【作用】電圧上昇率設定部1に設定される電圧と、ユニ
ット内部の電源電圧を常時比較し、その結果によって内
部電源制御部3がユニットの内部電源電圧が設定電圧に
等しくなるように制御する。電圧上昇率設定部の電圧上
昇速度を適切に設定することにより、ユニット内部電源
系のキャパシタンス成分は該電圧上昇速度で徐々に充電
されるので、ユニット挿入時の突入電流が減少し、突入
電流に起因して装置電源側に発生する電源ノイズが低減
する。従って、既設の他のユニットに悪影響を及ぼすこ
とがない。
The voltage set in the voltage rise rate setting section 1 is constantly compared with the power supply voltage inside the unit, and the internal power supply control section 3 controls the internal power supply voltage of the unit to be equal to the set voltage according to the result. .. By properly setting the voltage rise rate of the voltage rise rate setting unit, the capacitance component of the unit internal power supply system is gradually charged at the voltage rise rate, so the inrush current at the time of unit insertion is reduced and the inrush current is reduced. Power supply noise generated on the power supply side of the device is reduced. Therefore, it does not adversely affect other existing units.

【0008】また、既実装のユニットにおいては、装置
電源からの電源ノイズに対しては、内部電源制御部2で
電流がユニット内部から共通電源側に電流が逆流しない
ように構成することが容易なので、他ユニットの挿抜に
よる電源ノイズに対しても動作が安定する。さらにま
た、電圧上昇率設定部を高い周波数の電源ノイズの入力
に対して出力電圧(設定電圧)が変動を受けにくい構成
にすることも容易であり、これによって外部定電圧電源
として用いるスイッチングレギュレータ電源に現れるリ
ップルノイズ等の高周波ノイズに対して内部電源を安定
化させることができる。
Further, in the already mounted unit, it is easy to configure the internal power supply control unit 2 so that the current does not flow backward from the inside of the unit to the common power supply side with respect to the power supply noise from the device power supply. , Operation is stable against power supply noise caused by insertion / removal of other units. Furthermore, it is easy to configure the voltage rise rate setting unit so that the output voltage (setting voltage) is less susceptible to the input of high-frequency power supply noise, which allows a switching regulator power supply used as an external constant voltage power supply. It is possible to stabilize the internal power supply against high-frequency noise such as ripple noise appearing in.

【0009】[0009]

【実施例】以下添付図面により本発明の実施例を説明す
る。図2は本発明の実施例の構成図である。なお、図1
で示したものの同一のものは同一の符号で示してある。
Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 2 is a block diagram of an embodiment of the present invention. Note that FIG.
The same things as those indicated by are indicated by the same reference numerals.

【0010】図2の実施例では、定格電源電圧が+5V
で動作するユニットの例を示している。図において、1
は電圧上昇率設定部で、抵抗11とコンデンサ12の直列回
路よりなり、装置電源バスに接続するコネクタ41に抵抗
11が、アースに接続するコネクタ42にコンデンサ12が接
続している。そして、抵抗11とコンデンサ12との接続点
の電圧を設定電圧Vs として出力する。2はオペアンプ
等からなる比較器で、反転入力には設定電圧Vsが、非
反転入力にはユニット内部電源電圧Vu が入力し、両入
力の差電圧に比例した比較電圧を出力する。3は内部電
圧制御部で、トランジスタ31、ツエナーダイオード32、
抵抗33とからなり、ユニットの内部電源系とユニット外
の定電圧供給部との間に流れる電流を制御する。トラン
ジスタ31はエミッタが外部電源側のコネクタ41に、コレ
クタがユニット内部電源系に、ベースがツエナーダイオ
ード32と抵抗33を介して比較器2の出力に接続されてい
る。
In the embodiment shown in FIG. 2, the rated power supply voltage is + 5V.
Shows an example of a unit that operates in. In the figure, 1
Is a voltage rise rate setting unit, which is composed of a series circuit of a resistor 11 and a capacitor 12, and has a resistor 41
11, the capacitor 12 is connected to the connector 42 which is connected to the ground. Then, the voltage at the connection point between the resistor 11 and the capacitor 12 is output as the set voltage Vs. Reference numeral 2 is a comparator formed of an operational amplifier or the like. The set voltage Vs is input to the inverting input and the unit internal power supply voltage Vu is input to the non-inverting input, and a comparison voltage proportional to the difference voltage between both inputs is output. 3 is an internal voltage control unit, which includes a transistor 31, a Zener diode 32,
A resistor 33 controls the current flowing between the internal power supply system of the unit and the constant voltage supply unit outside the unit. The transistor 31 has an emitter connected to the connector 41 on the external power supply side, a collector connected to the unit internal power supply system, and a base connected to the output of the comparator 2 via a zener diode 32 and a resistor 33.

【0011】次に以上の構成になる本発明の電源導入回
路の動作を説明する。ユニットがラックに挿入され、コ
ネクタ41に+5Vが印加されると、抵抗11を介してコン
デンサ12の充電が始まる。抵抗11の抵抗値をR、コンデ
ンサ12のキャパシタンスをCとすると、時間t後の設定
電圧Vs は Vs =[ 5×(1−exp(−t ÷(RC)))] (V) の如く、0Vから+5Vに向かって所定のカーブで上昇
する。
Next, the operation of the power supply introducing circuit of the present invention having the above configuration will be described. When the unit is inserted into the rack and +5 V is applied to the connector 41, charging of the capacitor 12 via the resistor 11 starts. Assuming that the resistance value of the resistor 11 is R and the capacitance of the capacitor 12 is C, the set voltage Vs after the time t is Vs = [5 × (1−exp (−t ÷ (RC)))] (V) It rises in a predetermined curve from 0V to + 5V.

【0012】比較器2は、設定電圧Vs と内部電源電圧
Vu とを比較し、内部電源電圧Vuが低い場合には、出
力Vc の電圧を下げる。電圧Vc が下がり、コネクタ41
に印加されている外部定電圧源の電圧Vo との差がトラ
ンジスタ31のエミッタ・ベース電圧Vebとツエナーダイ
オードのツエナー電圧との和を越えると、抵抗33の値で
決まるベース電流が流れ、トランジスタ31はオンとなり
ユニット内部への電流供給が開始される。
The comparator 2 compares the set voltage Vs with the internal power supply voltage Vu, and when the internal power supply voltage Vu is low, lowers the voltage of the output Vc. The voltage Vc drops and the connector 41
When the difference between the voltage Vo of the external constant voltage source applied to the transistor 31 exceeds the sum of the emitter-base voltage Veb of the transistor 31 and the zener voltage of the zener diode, the base current determined by the value of the resistor 33 flows and the transistor 31 Turns on, and current supply to the inside of the unit starts.

【0013】この電源電流によってユニット内部電源系
に含まれるキャパシタンス成分5が充電されて内部電圧
電源が上昇する。ユニットの内部電源電圧Vu が、設定
電圧Vsより高くなると、比較器2の出力電圧Vc は上
昇し、外部電源電圧Vo との差が、トランジスタ31のエ
ミッタ・ベース電圧Vebとツエナーダイオードのツエナ
ー電圧との和を下回るとトランジスタ31はオフし、ユニ
ット内部への電流供給が停止する。
This power supply current charges the capacitance component 5 included in the unit internal power supply system to raise the internal voltage power supply. When the internal power supply voltage Vu of the unit becomes higher than the set voltage Vs, the output voltage Vc of the comparator 2 rises, and the difference between it and the external power supply voltage Vo becomes the emitter-base voltage Veb of the transistor 31 and the zener voltage of the zener diode. Is less than the sum of the above, the transistor 31 is turned off, and the current supply to the inside of the unit is stopped.

【0014】このように、内部電源制御部3は、内部電
源電圧Vu が設定電圧Vs に等しくなるように、外部電
源から内部電源への流入電流を制御するので、ユニット
挿入時には内部電源電圧Vu は設定電圧Vs の上昇率で
上昇する。従って、上昇率設定部1のCR時定数を適切
に定めれば、ユニット内部の電源系のキャパシタンス成
分5を急速に充電するこための突入電流が制限されるの
で、外部電源に発生する電源ノイズを低減でき、動作中
の既設他ユニットでの動作障害発生が防止される。
In this way, the internal power supply control unit 3 controls the inflow current from the external power supply to the internal power supply so that the internal power supply voltage Vu becomes equal to the set voltage Vs. It rises at the rate of rise of the set voltage Vs. Therefore, if the CR time constant of the rate of rise setting unit 1 is set appropriately, the inrush current for rapidly charging the capacitance component 5 of the power supply system inside the unit is limited, so that the power supply noise generated in the external power supply is reduced. Can be reduced, and the occurrence of operation failure in the existing other unit in operation can be prevented.

【0015】また、このユニットが既設ユニットとして
動作中に外部電源に電源ノイズが発生した場合には、内
部電源制御部3にトランジスタ31を用いていており、逆
方向( ユニット内部から外部電源側へ) に電流が流れな
いため、負性ノイズはユニット内部に伝達されないこ
と、及び、上昇率設定部1にRC積分回路を用いている
ためRC時定数より早い周波数の外部電源電圧変動には
追従できないことにより、ユニット外部からの電源ノイ
ズに対して、さらに動作が安定する。
If power supply noise occurs in the external power supply while this unit is operating as an existing unit, the transistor 31 is used in the internal power supply control unit 3 and the reverse direction (from the inside of the unit to the external power supply side) is used. ), No negative current is transmitted to the inside of the unit, and because the RC integrating circuit is used in the rise rate setting unit 1, it is not possible to follow the fluctuation of the external power supply voltage at a frequency faster than the RC time constant. This further stabilizes the operation against power supply noise from the outside of the unit.

【0016】なお、上記実施例では、電圧上昇率設定部
1に、RC積分回路を用いた例を示したが、電圧上昇率
を所定速度以下に出来るものであれば、LRC過渡減衰
回路やローパスフイルタでも同じ効果が得られることは
勿論である。
In the above embodiment, the example in which the RC integrator circuit is used in the voltage increase rate setting unit 1 is shown. However, if the voltage increase rate can be set to a predetermined speed or less, the LRC transient attenuating circuit or the low-pass filter can be used. Of course, the same effect can be obtained with a filter.

【0017】[0017]

【発明の効果】以上説明した如く本発明によれば、複数
のユニットからなる電子装置において、活線保守等で電
源を切断せずにユニットを挿抜する際に、既設ユニット
の誤動作を防止でき、装置の信頼性向上に寄与するとこ
ろが大きい。
As described above, according to the present invention, it is possible to prevent an erroneous operation of an existing unit when inserting or removing the unit in an electronic device including a plurality of units without disconnecting the power source for hot line maintenance or the like. It greatly contributes to the improvement of the reliability of the device.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本発明の電源導入回路の原理図FIG. 1 is a principle diagram of a power supply introducing circuit of the present invention.

【図2】 本発明の実施例の回路図FIG. 2 is a circuit diagram of an embodiment of the present invention.

【図3】 従来の電源導入回路の回路図FIG. 3 is a circuit diagram of a conventional power supply introduction circuit.

【符号の説明】[Explanation of symbols]

1…電圧上昇率設定部、11…抵抗、12…コンデンサ、2
…比較器、3…内部電源制御部、31…トランジスタ、41
…電源コネクタ、42…アースコネクタ
1 ... Voltage rise rate setting unit, 11 ... Resistor, 12 ... Capacitor, 2
Comparator, 3 Internal power supply control unit, 31 Transistor, 41
… Power connector, 42… Ground connector

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 外部定電圧電源とユニット内部電源との
間に設けられる電源導入回路であって、 外部定電圧電源に接続されたときに外部電源電圧(Vo)ま
で所定の速度で上昇する設定電圧(Vs)を出力する電圧上
昇率設定部(1) と、 該電圧上昇率設定部(1) の設定電圧(Vs)とユニット内部
電源の内部電源電圧(Vu)とを比較する比較器(2) と、 外部定電圧電源とユニット内部電源との間に接続され、
該比較器(2) の出力(Vc)に基づいて、内部電源電圧(V
u) が設定電圧(Vs)に等しくなるようにユニット内部電
源に流入する電流を制御する内部電源制御部(3) とから
なり、 ユニット内に設けられるていることを特徴とする電源導
入回路。
1. A power supply introducing circuit provided between an external constant voltage power supply and a unit internal power supply, wherein the setting is such that when connected to the external constant voltage power supply, the external power supply voltage (Vo) rises at a predetermined speed. A voltage rise rate setting unit (1) that outputs a voltage (Vs), and a comparator that compares the set voltage (Vs) of the voltage rise rate setting unit (1) with the internal power supply voltage (Vu) of the unit internal power supply ( 2) is connected between the external constant voltage power supply and the unit internal power supply,
Based on the output (Vc) of the comparator (2), the internal power supply voltage (V
The power supply introduction circuit is characterized in that it is provided in the unit, and comprises an internal power supply control section (3) for controlling the current flowing into the unit internal power supply so that u) becomes equal to the set voltage (Vs).
JP11785192A 1992-05-12 1992-05-12 Power introducing circuit Withdrawn JPH05313766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11785192A JPH05313766A (en) 1992-05-12 1992-05-12 Power introducing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11785192A JPH05313766A (en) 1992-05-12 1992-05-12 Power introducing circuit

Publications (1)

Publication Number Publication Date
JPH05313766A true JPH05313766A (en) 1993-11-26

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ID=14721859

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11785192A Withdrawn JPH05313766A (en) 1992-05-12 1992-05-12 Power introducing circuit

Country Status (1)

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JP (1) JPH05313766A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012085510A (en) * 2010-06-25 2012-04-26 Valeo Systemes De Controle Moteur Charging device for power storage means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012085510A (en) * 2010-06-25 2012-04-26 Valeo Systemes De Controle Moteur Charging device for power storage means

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A300 Withdrawal of application because of no request for examination

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Effective date: 19990803