JPS58179137A - Present and preliminary power source switching control circuit - Google Patents
Present and preliminary power source switching control circuitInfo
- Publication number
- JPS58179137A JPS58179137A JP57062209A JP6220982A JPS58179137A JP S58179137 A JPS58179137 A JP S58179137A JP 57062209 A JP57062209 A JP 57062209A JP 6220982 A JP6220982 A JP 6220982A JP S58179137 A JPS58179137 A JP S58179137A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- supply circuit
- stabilized power
- output
- voltage
- 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
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は高信頼度化のために現用と予備の電源を備えた
電源装置を制御する切換制御回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching control circuit for controlling a power supply device having a working power source and a standby power source in order to improve reliability.
鏝初に第１図を用いて従来の現用・予備電源の切換回路
を説明する。First, a conventional switching circuit for active and standby power sources will be explained using FIG.
第１図において、ＰＵＩは現用直流安定化′＠電源回路
ＰＵ２は予備直流安定化電源回路であシ、１および１ｉ
ｔ−ｊ非安定化直流電源、２お工び１２は主制御回路、
３および１３は誤差増幅回路、４および１４は基準゛電
圧発生回路、９は負荷、ＤｌおよびＤｌｌは逆電流阻止
用ダイオード、Ｃ１ハ平滑用コンデンサである。各電源
回路は誤差増幅器３．１３によって出力電圧と基準電圧
発生回路４，１４の電圧を比較し、その差分を主制碕［
田路２，１２で修正制御することにより目的の出力を得
ている。出力電圧の検出は負［９の端子間で行なわれて
おり、現用機ＰＵＩの出力電圧が予備機ＰＵ２よりも少
し高い出力電圧に設定されている。したがって常時はダ
イオードＤ１が順方向の導通状態にあって、現用機ＰＵ
１から負荷９に定電圧制ｍされた直流が供給されている
。この状態において、予備＠Ｐ Ｕ ２の誤差増幅回路
１３に与えられている検出電圧■３であって、これに誤
差増幅回路１３に与えられている基準電圧Ｖ１１より少
し高い電圧となつっているため、主制御回路１２は常に
出力電圧Ｖ１２を下げるような動作を行い、定常状態で
は出力電圧Ｖ１２の値はほぼ零ポル）Ｋなっている。In Figure 1, PUI is the active DC stabilization power supply circuit PU2 is the standby DC stabilization power supply circuit, 1 and 1i
t-j unregulated DC power supply, 2 workpiece 12 is the main control circuit,
3 and 13 are error amplifier circuits, 4 and 14 are reference voltage generation circuits, 9 is a load, Dl and Dll are reverse current blocking diodes, and C1 is a smoothing capacitor. Each power supply circuit compares the output voltage with the voltage of the reference voltage generation circuits 4 and 14 using an error amplifier 3.13, and calculates the difference between the output voltage and the voltage of the reference voltage generation circuits 4 and 14.
The target output is obtained by corrective control at Taji 2 and 12. The output voltage is detected between the negative terminals, and the output voltage of the active unit PUI is set to a slightly higher output voltage than that of the standby unit PU2. Therefore, the diode D1 is normally conductive in the forward direction, and the current device PU
1 to a load 9 is supplied with constant voltage controlled direct current. In this state, the detection voltage ■3 given to the error amplification circuit 13 of the standby @P U 2 is slightly higher than the reference voltage V11 given to the error amplification circuit 13. Therefore, the main control circuit 12 always operates to lower the output voltage V12, and in a steady state, the value of the output voltage V12 is approximately zero.
以上のように構成されている従来の電源切換回路は例え
ば現用機ＰＵＩが故障して停止した場合、予備機ＰＵ２
は出力電圧零ボルトｊ−ら立上って、現用機１のかわり
に負荷９に対して直流を供給しなくてはならないため、
切換時に大きな過渡電圧変動を伴う。また、現用機ＰＵ
Ｉの間欠的な出力低下の場合、ＰＵＩが回復したとき再
び現用機ＰＵＩから直流を供給してしまう。For example, in the conventional power supply switching circuit configured as described above, when the active machine PUI fails and stops, the standby machine PU2
rises from the output voltage of zero volts j-, and must supply direct current to the load 9 instead of the current machine 1.
Large transient voltage fluctuations occur during switching. In addition, the current machine PU
In the case of an intermittent decrease in the output of I, when the PUI recovers, direct current is again supplied from the PUI of the current machine.
さらに、あらかじめ予備ｍＰＵ２出力電圧をやや低めに
設定して現用機を固定しているため、低出力電圧で安定
に使用しようとすると、所定の電圧変動率を満すのが困
難となる等の欠点があった。Furthermore, since the preliminary mPU2 output voltage is set in advance to a slightly lower value and the current unit is fixed, there are disadvantages such as difficulty in meeting the specified voltage fluctuation rate if you try to use it stably at a low output voltage. was there.
本発明の目的は並列接続された２つの直流安定化電源の
出力電圧會全く同じ値に設定して所定の切替動作により
一方は現用機に、他方は予備機に指定できるようにする
ことＫより上記欠点を除去し、安定に、かつ高精度の直
流電圧を現用機または予備機から出力することができる
ようにした現用・予備電源切換制御回路を提供すること
にある。The purpose of the present invention is to set the output voltages of two DC stabilized power supplies connected in parallel to exactly the same value so that one can be designated as a working unit and the other as a standby unit by a predetermined switching operation. It is an object of the present invention to provide a current/standby power supply switching control circuit which eliminates the above-mentioned drawbacks and allows a stable and highly accurate DC voltage to be output from a working machine or a standby machine.
前記目的を達成するために、本発明による現用・予備電
源切換制御回路は負荷に対して２台の直流安定化電源回
路の出力を夫々ダイオード金介して並列接続する形式の
現用・予備電源回路において、各直流安定化電源回路毎
に、前記ダイオード出力電圧と他方の直流安定化電源回
路の一部の出力であってその直流安定化電源回路の出力
が規定電圧から下がった場合、前記ダイオード出力電圧
の降下速度より速く降下する所定電圧との大小を比較す
るコンパレータと、主制御回路出力と誤差増幅器入力間
に接続され、前記コンパレータ出力を制御電圧とするス
イッチング素子とを設け、さらに前記２つのコンパレー
タの所定電圧が入力される端子のいずれか一方金選択し
、その選択端子を電源回路の負側に接続するスイッチと
を設け、前記スイッチによ抄いずれか一方を選択するこ
とによシ、選択された側の直流安定化電源回路のスイッ
チング素子をオフしその手制御回路の出力と誤差増幅器
の入力を切離してその選択された側の直流安定化電源回
路を現用とする一方、他方の直流安定化電源回路のスイ
ッチング素子をオンしその主制御回路の出力と誤差増幅
器の入力を同一電位にしてその他方の直流安定化電源回
路を待機状態とし、前記境用直流安定化電源回路の出力
が所定値より低下した場合、待機している直流安定化電
源回路・側のスイッチング素子をオフしてその直流安定
化電源回路の電圧を出力させ、前記スイッチが切換えら
れることによ）前記出力が低下した直流安定化電源回路
のスイッチング素子をオンしてその動作を止め待機状態
にするように構成しである。In order to achieve the above object, the present invention provides a current/standby power supply switching control circuit for a current/standby power supply circuit in which the outputs of two DC stabilized power supply circuits are connected in parallel to the load through respective diodes. , for each DC stabilized power supply circuit, if the diode output voltage and the output of a part of the other DC stabilized power supply circuit drop from the specified voltage, the diode output voltage and a switching element connected between the main control circuit output and the error amplifier input and using the comparator output as a control voltage. A switch is provided that selects one of the terminals to which a predetermined voltage is input, and connects the selected terminal to the negative side of the power supply circuit, and selects one of the terminals by using the switch. The switching element of the DC stabilized power supply circuit on the selected side is turned off, and the output of the control circuit and the input of the error amplifier are disconnected to make the DC stabilized power supply circuit on the selected side active. The switching element of the boundary DC power supply circuit is turned on, and the output of the main control circuit and the input of the error amplifier are set to the same potential, and the other DC stabilized power supply circuit is placed in a standby state, and the output of the boundary DC stabilized power supply circuit is set to a predetermined level. When the voltage drops below the value, the switching element on the standby DC stabilized power supply circuit is turned off to output the voltage of that DC stabilized power supply circuit, and the output is decreased by switching the switch. It is configured to turn on the switching element of the DC stabilized power supply circuit, stop its operation, and enter a standby state.
前記構成によれば現用機の電圧が異常に低下した場合で
も大きな電圧変動を伴なわずに予備機に切換可能となυ
、一旦予備１１１に切換われば現用であった電源回路の
出力が間欠的に回復しても予備機がそのまま現用機に保
持されるようになり、本発明の目的は完全に達成される
。According to the above configuration, even if the voltage of the working machine drops abnormally, it is possible to switch to the standby machine without large voltage fluctuations.
Once switched to the standby unit 111, even if the output of the current power supply circuit is intermittently restored, the standby unit is maintained as the active unit, and the object of the present invention is completely achieved.
以下、図面を参照して本発明をさらに詳しく説明する。Hereinafter, the present invention will be explained in more detail with reference to the drawings.
第２図は本発明による現用・予備電源切換回路を示す回
路図である。第２図において、現用・予備直流安定化電
源回路ＰＵＩ、ＰＵ２は過電圧検出ショート回路５，１
５が付加されていることを除けば第１図の回路構成と同
じである。FIG. 2 is a circuit diagram showing a current/standby power supply switching circuit according to the present invention. In FIG. 2, the active/standby DC stabilizing power supply circuits PUI and PU2 are overvoltage detection short circuits 5 and 1.
The circuit configuration is the same as that of FIG. 1 except that 5 is added.
直流安定化、電源回路ＰＵＩ側において、ダイオードＤ
１のアノードは電源出力端子６に、カソードに負荷９に
それぞれ接続されている。ＰＮＰトランジスタＱ１のエ
ミッタはダイオードＤ１のアノードに、コレクタは検出
４８号入力端子７にそれぞれ接続されている。さらＫＰ
ＮＰ ）ランジスタＱ１のコレクタは抵抗器Ｒ２を介し
てダイオードＤ１のカソードにも接Ｍされている。Direct current stabilization, on the power supply circuit PUI side, diode D
The anode of No. 1 is connected to the power output terminal 6, and the cathode of No. 1 is connected to the load 9. The emitter of the PNP transistor Q1 is connected to the anode of the diode D1, and the collector is connected to the detection No. 48 input terminal 7. Sara KP
NP) The collector of transistor Q1 is also connected to the cathode of diode D1 via resistor R2.
コンパレータ２１の出力は抵抗器ａｌｔ介してＰＮＰ
）ランジスタＱｌのベースに、非反転側入力端子はダイ
オードＤ１のカソードに、反転入力端子に直流安定化電
源回路ＰＵＩの電源出力端チェ６と共通帰線端子間に挿
入された直列回路を形成する可変抵抗器Ｒ１４と抵抗器
Ｒ１３の接続点にそれぞれ接続されている。The output of comparator 21 is PNP via resistor alt.
) A series circuit is formed in the base of the transistor Ql, the non-inverting side input terminal is inserted in the cathode of the diode D1, and the inverting input terminal is inserted between the power output terminal check 6 of the DC stabilized power supply circuit PUI and the common return terminal. Each is connected to a connection point between variable resistor R14 and resistor R13.
以上の直流安定化電源回路ＰＵＩの構成はＰＯ２におい
ても同様で、ダイオードＤ１のアノードＵｍ源出力端子
１６に、カソードは負荷にそれぞれ接続されている。Ｐ
ＮＰ ）ランジスタＱｌｌのエミッタにダイオードＤｌ
ｌのアノードに、コレクタは検出信号入力端子１７にそ
れぞれ接続されている。The configuration of the DC stabilized power supply circuit PUI described above is the same in PO2, and the anode and cathode of the diode D1 are connected to the Um source output terminal 16 and the load, respectively. P
NP) Diode Dl is connected to the emitter of transistor Qll.
The anode and collector of 1 are connected to a detection signal input terminal 17, respectively.
さらにＰＮＰ）う／ジスーＱｌｌのコレクタは抵抗器Ｒ
１２を介してダイオードＤｌｌのカソードにも接続され
ている。コンパレータＺｌｌの出力は抵抗器１’Ｌ１１
を介してＰＮＰ ）ランジスタＱｌｌのベースに、非反
転側入力端子はダイオードＤ１１のカソードＫ、反転入
力端子は直流安定化電源回路ＰＵＩの′Ｉｊｉ源出力端
子６と共通帰線端子に挿入された直列回路を形成する可
変抵抗器Ｒ４と抵抗器Ｒ３の接続点にそれぞれ接続され
ている。直流安定化電源回路ＰＵＩ、ＰＵ２のいずれか
を現用、他方を予備に選択するためのトグルスイッチＳ
Ｗｌの接点１ＦｉコンパレータＺｌの反転入力端子に、
接点ｂｔｊコンパレーメＺｌｌの反転入力端子に、共通
端子は共通帰線端子にそれぞれ接続されている。Furthermore, the collector of PNP) U/JIQll is resistor R.
It is also connected to the cathode of the diode Dll via 12. The output of comparator Zll is connected to resistor 1'L11
The non-inverting side input terminal is the cathode K of the diode D11, and the inverting input terminal is a series terminal connected to the base of the transistor Qll (PNP) inserted to the base of the transistor Qll, and the inverting input terminal is connected to the source output terminal 6 of the DC stabilized power supply circuit PUI and the common retrace terminal. They are respectively connected to the connection points of variable resistor R4 and resistor R3 forming a circuit. Toggle switch S for selecting either DC stabilized power supply circuit PUI or PU2 for active use and the other for backup
Wl contact 1Fi to the inverting input terminal of the comparator Zl,
The contact btj is connected to the inverting input terminal of the comparator Zll, and the common terminal is connected to the common return terminal.
次に回路動作について説明する。前記公知の直流安定化
電源回路ＰＵ１およびＰＯ２のダイオード通過後の電圧
に、はぼ同じ電圧■３になるように設定されており、図
示のようにトグルスイッチＳＷ１の接点ａとＣがメーク
されているとすると、コンパレータＺｌの反転側入力端
子は、コンパレータｚ１の非反転側入力端子よ抄必ず電
位が低くなるため、ＰＮＰ）ランジスタＱｌはオフとな
り、直流安定化電源回路ＰＵＩはダイオード通過後の電
圧■３が■１とほぼ等しい値になる↓うに動作し、した
がって負荷９に対して直流を供給する現用機となる。こ
の状態において可変抵抗器Ｒ４を操作してコンパレータ
Ｚｌｌの反転側端子の電位を、ダイオードＤ１１のカソ
ード電位よりも少し高く設定しておけば、トランジスタ
Ｑｌｌはオンとなシ、直流安定化ｔＥＪ１回路ＰＵ２ｄ
、ｆイオ−ドＤ１１の７／−ド電位がＶｌｌすなわちほ
ぼ■３と同電位になるように動作し、したがって負荷９
に対し直流の供給は行なわず予備機となる。Next, the circuit operation will be explained. The voltage after passing through the diodes of the known DC stabilized power supply circuits PU1 and PO2 is set to be approximately the same voltage (3), and the contacts a and C of the toggle switch SW1 are made as shown in the figure. Assuming that the inverting input terminal of the comparator Zl has a lower potential than the non-inverting input terminal of the comparator z1, the PNP transistor Ql is turned off, and the DC stabilizing power supply circuit PUI has a voltage after passing through the diode. ■3 becomes approximately equal to ■1 ↓ It operates as follows, and therefore becomes a working machine that supplies DC to load 9. In this state, if the variable resistor R4 is operated to set the potential of the inverting terminal of the comparator Zll to be a little higher than the cathode potential of the diode D11, the transistor Qll will not be turned on and the DC stabilization tEJ1 circuit PU2d will be turned on.
, operates so that the 7/- potential of the f-ion D11 becomes Vll, that is, approximately the same potential as 3, and therefore the load 9
However, it will not be supplied with direct current and will be used as a standby unit.
次に現用機ＰＵＩが何らかの故障により負荷９に対して
直流を供給できなくなると、ダイオードＤ１のアノード
の電位に急速に下るがダイオードＤＩのカソードの電位
はコンデンサｃ１の蓄積電荷のためにゆっくりと低下す
る。このためコンパレータＺｉｌの反転側入力電位が非
反転側入力電位より低くなり、Ｚｌｌの出力か−・イレ
ベルとなってトランジスタＱｌｌＦｉオフとなり、直流
安定化ｉｉ源回路ＰＵ２１ｄダイオード通過後の電圧ｖ
３がＶｌｌとほぼ等しい値になるように動作し、したが
って負荷９に対して直流を供給するようになる。このよ
うな状態でトグルスイッチ８Ｗ１を接点すとＣがメーク
されるように手動により切換えれば直流安定化電源回路
ＰＵ２が現用機となり、直流安定化電源回路ＰＵｌｉ容
易にかつ安全に保守交換することが可能となる。なお、
可変抵抗器Ｒ１４Ｆｉ、 トグルスイッチ８Ｗｌによ
りＰＵＩを予備機の状態にして、可変抵抗器Ｒ４と同様
にして操作調整する。Next, when the current machine PUI is unable to supply DC to the load 9 due to some kind of failure, the potential of the anode of the diode D1 will drop rapidly, but the potential of the cathode of the diode DI will slowly drop due to the accumulated charge in the capacitor c1. do. Therefore, the input potential on the inverting side of the comparator Zil becomes lower than the input potential on the non-inverting side, and the output of Zll becomes low level, turning off the transistor QllFi, and the voltage v after passing through the diode of the DC stabilization ii source circuit PU21d
3 is approximately equal to Vll, and therefore direct current is supplied to the load 9. In such a state, when the toggle switch 8W1 is contacted, C is made, so if the switch is manually switched, the DC stabilized power supply circuit PU2 becomes the working device, and the DC stabilized power supply circuit PUli can be maintained and replaced easily and safely. becomes possible. In addition,
Variable resistor R14Fi and toggle switch 8Wl put PUI in a standby state and are operated and adjusted in the same manner as variable resistor R4.
可変抵抗器Ｒ４およびＲ１４ＫよるコンパレータＺ１お
よびＺｌｌの反転側端子の電位の副！Ｉは、ダイオード
ＤｌｌたｆｌＤ２のカソード電位に極めて近い値にすれ
ば現用から予備への切換時の亀圧変勧が小さくなるが、
逆に現用・予備の切換の確実性がノイズ等のため減少す
るので、安定化電源の回路タイプに合せて適切に行う必
要がある。Subtraction of the potential of the inverting side terminals of comparators Z1 and Zll by variable resistors R4 and R14K! If I is set to a value very close to the cathode potential of the diodes Dll and flD2, the tortoise pressure change when switching from active to standby will be reduced, but
On the other hand, the reliability of switching between active and standby power sources is reduced due to noise, etc., so it is necessary to do this appropriately depending on the circuit type of the stabilized power supply.
このよう圧して、各回路定数を適切な値に選ぶことＫよ
り、負荷９に対する現用機から予備機への切換時の負荷
９での過渡電圧変動を非常に小さくできる。また、一旦
現用機が出力供給不可能となり、前述のシーケンスで予
備機の運転に切替った後、現用機の出力供給能力が回復
しても現用とはならないため保守性においても優れてい
る。By applying this pressure and selecting appropriate values for each circuit constant, the transient voltage fluctuation in the load 9 when switching from the working machine to the standby machine can be made very small. Furthermore, once the active machine becomes unable to supply output and switches to operation of the standby machine in the above-described sequence, even if the active machine regains its output supply capacity, it does not become active, which is excellent in maintainability.
さらに現用機、予備機いずれにおいても負荷９に印加さ
れる定常電圧■３ｒｉはぼ同じ値にすることができ、そ
れだけ電圧安定度が向上する。Furthermore, the steady voltage 3ri applied to the load 9 can be made to be approximately the same value in both the active machine and the standby machine, and the voltage stability is improved accordingly.
以上、詳しく説明したように本発明によれば現用・予備
切換時の負荷に対する過渡電圧の変動や定常電圧変動を
非常に小さくできるという効果がある。As described in detail above, according to the present invention, there is an effect that transient voltage fluctuations and steady voltage fluctuations with respect to the load at the time of switching between working and standby can be extremely reduced.
第１Ｉ２３に従来例の回路図、第２図は本発明による現
用・予を電源切換回路の一実施例を示す回路図である。
ＰＵＩ 、ＰＯ２・・・直流安定化電源回路１．１１・
・・非安定化直流ｌｉｔ源
２．１２ｖ・主制御回路 ３，１３・・・誤差増幅回
路４．１４・・・＆準電圧発生回路
５．１５・・・過゛罐圧検出ショート回路６．１６・・
・電源出力端子
７．１７・・・検出信号入力端子
８．１８・・共通帰線端子 ９・・・負荷Ｒ１〜３．
Ｒ１１〜Ｒ１３・・・抵抗器Ｚｌ、Ｚｌｌ・・・コンパ
レータ
Ｑｌ、Ｑｌｌ・・・トランジスタ
ＤＩ、Ｄｌｌ・・・ダイオード ＣＩ・・・コンデンサ
ｓｗ１・・・トグルスイッチ
Ｒ４，Ｒ１４・・・＝１変抵抗器
特許出願人 日本亀気株式会社
代理人 弁理士 井ノ ロ 縛
”Ｂ”″）1I23 is a circuit diagram of a conventional example, and FIG. 2 is a circuit diagram showing an embodiment of a current/preliminary power source switching circuit according to the present invention. PUI, PO2...DC stabilized power supply circuit 1.11.
・・Unregulated DC light source 2.12V・Main control circuit 3, 13 ・・Error amplification circuit 4.14 ・・Quasi voltage generation circuit 5.15 ・・Overcapacity detection short circuit 6. 16...
- Power output terminal 7.17...Detection signal input terminal 8.18...Common return terminal 9...Load R1 to 3.
R11-R13...Resistor Zl, Zll...Comparator Ql, Qll...Transistor DI, Dll...Diode CI...Capacitor sw1...Toggle switch R4, R14...=1 variable resistor Device patent applicant: Nippon Kameki Co., Ltd. Agent: Patent attorney: Inoro Taku “B””)
Claims (1)
イオードを介して並列接続する形式の現用・予備電源回
路において、各直流安定化電源回路毎に、前記ダイオー
ド出力電圧と他方の直流安定化電源回路の一部の出力で
あってその直流安定化電源回路の出力が規定電圧から下
がった場合、前記ダイオード出力電圧の降下速に工９速
く降下する所定電圧との大小を比較するコンパレータと
、主制御回路出力と誤差増幅器入力間に接続され、前記
コンパレータ出力を制匂゛峨圧とするスイッチング素子
とを設け、さらに前記２つのコンパレータの所定電圧が
入力される端子のいずれか一方を選択し、その選択端子
を電源回路の負側に接続するスイッチとを設け、前記ス
イッチによりいずれか一方を通訳することにより、選択
された側の直流安定化電源回路のスイッチング素子をオ
フしその主制御回路の出力と誤差増幅器の入力を切離し
てその選択された側の直流安定化電源回路を現用とする
一方、他方の直流安定化電源回路のスイッチング素子を
オンしその主制御回路の出力と誤差増幅器の入力を同一
゛鑞位にしてその他方の直流安定化電源回路を待機状態
とし、前記現用直流安定化電源回路の出力が所定値エフ
低下した場合、待機している直流安定化電源回路側のス
イッチング素子をオフしてその直流安定化電源回路の電
圧を出力させ前記スイッチが切換えられることＫより前
記出力が低下した直流安定化電源回路側のスイッチング
素子をオンしてその動作を止め待機状態にするように構
成したことを特徴とする現用・予備電源切換制御回路。In a working/standby power supply circuit in which the outputs of two DC stabilized power supply circuits are connected in parallel to a load via diodes, each DC stabilized power supply circuit has a voltage difference between the diode output voltage and the other DC stabilized power supply circuit. a comparator that compares the magnitude with a predetermined voltage that drops faster than the rate of drop of the diode output voltage when the output of the DC stabilized power supply circuit drops from a specified voltage; , a switching element connected between the main control circuit output and the error amplifier input and using the comparator output as a limiting pressure, and further selecting one of the terminals to which a predetermined voltage of the two comparators is input. and a switch that connects the selection terminal to the negative side of the power supply circuit, and by interpreting either one with the switch, the switching element of the DC stabilized power supply circuit on the selected side is turned off and its main control is performed. The output of the circuit and the input of the error amplifier are separated, and the DC stabilized power supply circuit on the selected side is made active, while the switching element of the other DC stabilized power supply circuit is turned on to connect the output of its main control circuit and the error amplifier. When the input of the DC stabilized power supply circuit is set to the same level and the other DC stabilized power supply circuit is put into a standby state, and the output of the working DC stabilized power supply circuit drops by a predetermined value, the DC stabilized power supply circuit that is on standby is The switching element is turned off to output the voltage of the DC stabilized power supply circuit and the switch is switched.The switching element on the side of the DC stabilized power supply circuit whose output has decreased due to K is turned on to stop its operation and enter a standby state. A current/standby power supply switching control circuit characterized in that it is configured to:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57062209A JPS58179137A (en) | 1982-04-13 | 1982-04-13 | Present and preliminary power source switching control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57062209A JPS58179137A (en) | 1982-04-13 | 1982-04-13 | Present and preliminary power source switching control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58179137A true JPS58179137A (en) | 1983-10-20 |
Family
ID=13193512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57062209A Pending JPS58179137A (en) | 1982-04-13 | 1982-04-13 | Present and preliminary power source switching control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58179137A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6260436A (en) * | 1985-09-10 | 1987-03-17 | ウエスチングハウス エレクトリック コ−ポレ−ション | Redundancy power source |
-
1982
- 1982-04-13 JP JP57062209A patent/JPS58179137A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6260436A (en) * | 1985-09-10 | 1987-03-17 | ウエスチングハウス エレクトリック コ−ポレ−ション | Redundancy power source |
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