JPH0524734B2 - - Google Patents
Info
- Publication number
- JPH0524734B2 JPH0524734B2 JP59169053A JP16905384A JPH0524734B2 JP H0524734 B2 JPH0524734 B2 JP H0524734B2 JP 59169053 A JP59169053 A JP 59169053A JP 16905384 A JP16905384 A JP 16905384A JP H0524734 B2 JPH0524734 B2 JP H0524734B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- resistor
- power supply
- stabilized power
- load
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 25
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 description 20
- 239000003990 capacitor Substances 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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- Power Sources (AREA)
- Direct Current Feeding And Distribution (AREA)
- Control Of Voltage And Current In General (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、データ処理装置に適する現用・予備
電源切換装置に関する。特に、この装置の現用電
源と予備電源との切換制御手段に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a working/standby power supply switching device suitable for a data processing device. In particular, the present invention relates to means for controlling switching between a working power source and a standby power source for this device.
従来例現用・予備電源切換装置は、第２図に示
すように構成されている。この図で直流安定化部
４および２４の端子８および２８は過不足電圧検
出用端子であり、これは直流安定化電源回路PU
１およびPU２の出力端子１０および３０にそれ
ぞれ接続され、また直流安定化部４および２４の
安定化用電圧検出端子９および２９は逆電流阻止
用ダイオードＤ４１およびＤ４２のカソードに接
続される。このように過不足電圧検出用端子８お
よび２８と安定化用電圧検出端子９および２９と
が同一点で接続されていない。この接続により直
流安定化電源回路PU１およびPU２のいずれの回
路で電圧異常が発生したかの判定が行われ、故障
側の回路が切り離される。
A conventional active/standby power supply switching device is constructed as shown in FIG. In this figure, terminals 8 and 28 of the DC stabilizing units 4 and 24 are terminals for detecting excess and insufficient voltages, and these are terminals for detecting excess and insufficient voltages in the DC stabilizing power supply circuit PU.
The stabilizing voltage detection terminals 9 and 29 of the DC stabilizing units 4 and 24 are connected to the cathodes of reverse current blocking diodes D41 and D42, respectively. In this way, the over/under voltage detection terminals 8 and 28 and the stabilizing voltage detection terminals 9 and 29 are not connected at the same point. Through this connection, it is determined in which circuit of the DC stabilizing power supply circuits PU1 and PU2 a voltage abnormality has occurred, and the faulty circuit is disconnected.
このような従来例現用・予備電圧切換装置で
は、ダイオードＤ４１およびＤ４２の順方向電圧
下降の変動および直流安定化電源回路PU１およ
びPU２と負荷４９間の配線に生ずる電圧降下の
変動などのために直流安定化電源回路PU１およ
びPU２の出力安定化精度が高くとも負荷４９の
両端電圧の安定度が変動することがある。
In such a conventional working/standby voltage switching device, the DC voltage is changed due to fluctuations in the forward voltage drop of the diodes D41 and D42 and fluctuations in the voltage drop that occurs in the wiring between the DC stabilized power supply circuits PU1 and PU2 and the load 49. Even if the output stabilization accuracy of the stabilized power supply circuits PU1 and PU2 is high, the stability of the voltage across the load 49 may fluctuate.
一方、従来例装置では、この負荷電圧を監視す
るための過不足電圧検出は現用機、予備機ともそ
の出力端で行つている。このため誤動作の危険を
避けるために負荷端との間に挿入されたダイオー
ドおよび配線に生ずる定常電圧下降ならびに過渡
電圧下降分だけ余裕度をもたせる必要があつた。
もし負荷４９が集積回路であつた場合にはその両
端電圧が5Vまたはそれ以外であり過不足電圧検
出に動作余裕に加えて雑音余裕をもたせるとその
余裕値の割合は負荷４９の両端電圧値に対して数
十％以上の値となる。 On the other hand, in conventional devices, excess/deficiency voltage detection for monitoring the load voltage is performed at the output terminals of both the active and standby devices. Therefore, in order to avoid the risk of malfunction, it is necessary to provide a margin for the steady voltage drop and transient voltage drop that occur in the diode and wiring inserted between the load terminal and the load end.
If the load 49 is an integrated circuit, the voltage across it is 5V or something else, and if a noise margin is provided in addition to the operating margin for over/under voltage detection, the ratio of the margin value will be the voltage across the load 49. The value is several tens of percent or more.
この結果検出レベルが低すぎると誤動作頻度が
増大し、検出レベルが高すぎると負荷装置の早期
劣化または損傷を招く欠点があつた。 As a result, if the detection level is too low, the frequency of malfunctions increases, and if the detection level is too high, the load device may deteriorate or be damaged prematurely.
本発明は、この欠点を解決するもので、安定化
制御の機能を損なうことなく、高精度で現用・予
備の各々の直流安定化電源回路の出力電圧異常を
検出することができる手段を備えた現用・予備電
圧供給装置を提供することを目的とする。 The present invention solves this drawback by providing means that can detect output voltage abnormalities of each of the current and standby DC stabilizing power supply circuits with high precision without impairing the stabilization control function. The purpose is to provide working and standby voltage supply equipment.
本発明は、それぞれ直流安定化部を含む二つの
直流安定化電源回路を備え、その二つの直流安定
化電源回路にはそれぞれ、外部直流電源の非接地
側の端子に接続される入力端子と、この外部直流
電源の接地側の端子および外部負荷の接地側の端
子に接続される手打接続端子と、出力端子と、過
電圧および不足電圧を検出する第一の検出端子
と、安定化電圧を検出する第二の検出端子とを含
み、上記各出力端子と、上記外部負荷の非接地側
の端子との間にそれぞれ出力電流の方向に順方向
に接続されたダイオードを備えた電源切換装置
で、前述の問題点を解決するための手段として、
上記二つの直流安定化電源回路には、それぞれ、
上記第一の検出端子と上記第二の検出端子とがそ
のコレクタに接続され、上記出力端子にそのエミ
ツタが接続されたトランジスタと、このトランジ
スタのコレクタと上記接地端子との間に挿入さ
れ、直列接続された第一の抵抗器および第二の抵
抗器と、上記出力端子にその一端が接続された第
三の抵抗器と、上記トラジスタのベースにその一
端が接続された第五の抵抗器と、この第五の抵抗
器の他端と上記第三の抵抗器の他端との間に挿入
された第四の抵抗器と、上記第一の抵抗器と上記
第二の抵抗器との接続点がその非反転入力に接続
され、その出力が上記第四の抵抗器と上記第五の
抵抗器の接続点に接続された比較器とを備え、一
方の直流安定化電源回路の比較器の反転入力が他
方の直流安定化電源回路の第三の抵抗器と第四の
抵抗器との接続点に接続され、また、上記第一の
抵抗器と上記第二の抵抗器の接続点が上記負荷端
子の他方の端子に接続されたことを特徴とする。
The present invention includes two DC stabilized power supply circuits each including a DC stabilization section, and each of the two DC stabilized power supply circuits has an input terminal connected to a non-grounded terminal of an external DC power supply. A hand connection terminal connected to the ground side terminal of this external DC power supply and the ground side terminal of the external load, an output terminal, a first detection terminal for detecting overvoltage and undervoltage, and a stabilizing voltage detection terminal. a second detection terminal, and includes diodes connected in the forward direction in the direction of output current between each of the output terminals and the non-grounded terminal of the external load; As a means to solve the problems of
The above two DC stabilized power supply circuits each have the following:
A transistor whose collector is connected to the first detection terminal and the second detection terminal and whose emitter is connected to the output terminal is inserted between the collector of this transistor and the ground terminal, and is connected in series. a first resistor and a second resistor connected to each other; a third resistor having one end connected to the output terminal; and a fifth resistor having one end connected to the base of the transistor. , a fourth resistor inserted between the other end of this fifth resistor and the other end of the third resistor, and the connection between the first resistor and the second resistor. a comparator whose output is connected to the connection point of the fourth resistor and the fifth resistor; The inverting input is connected to the connection point between the third resistor and the fourth resistor of the other DC stabilized power supply circuit, and the connection point between the first resistor and the second resistor is connected to the connection point between the first resistor and the second resistor. It is characterized in that it is connected to the other terminal of the load terminal.
過不足電圧検出および安定化制御用電圧検出
を、半導体スイツチの動作により、現用機では負
荷端で行い、また、予備機では直流安定化電源回
路の出力端で行うように作動する。
Excess/deficiency voltage detection and stabilization control voltage detection are performed at the load end in the active unit, and at the output end of the DC stabilized power supply circuit in the standby unit, by the operation of the semiconductor switch.
以下、本発明実施例装置を図面を用いて説明す
る。
DESCRIPTION OF THE PREFERRED EMBODIMENTS A device according to an embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明実施例装置の構成を示す回路図
である。 FIG. 1 is a circuit diagram showing the configuration of an apparatus according to an embodiment of the present invention.
まず、本発明実施例装置の構成を第１図に基づ
いて説明する。この実施例装置５０は、第一の直
流安定化電源回路PU１およびPU２と、ダイオー
ドオア回路DU１とを備える。ここで、第一の直
流安定化電源回路PU１には、直流安定化部４と
切換制御部１５を備え、さらに切換制御部１５に
は、比較器Ｚ１と、PNPトランジスタＱ１と抵
抗器Ｒ１〜Ｒ５とを備える。また、第二の直流安
定化電源回路PU２には、比較器Ｚ２１と、PNP
トランジスタＱ２１と、抵抗器Ｒ２１〜Ｒ２５を
備える。 First, the configuration of an apparatus according to an embodiment of the present invention will be explained based on FIG. This embodiment device 50 includes first DC stabilized power supply circuits PU1 and PU2 and a diode OR circuit DU1. Here, the first DC stabilized power supply circuit PU1 includes a DC stabilizing section 4 and a switching control section 15, and the switching control section 15 further includes a comparator Z1, a PNP transistor Q1, and resistors R1 to R5. Equipped with. In addition, the second DC stabilized power supply circuit PU2 includes a comparator Z21 and a PNP
It includes a transistor Q21 and resistors R21 to R25.
外部の非安定化電源１は直流安定化電源回路
PU１の端子２と３の間に挿入され端子３は共通
電位に接続され、非安定化電源２１は直流安定化
電源回路PU２に端子２２と２３との間に挿入さ
れ端子２３は共通電位に接続される。また、直流
安定化電源回路PU１内では、端子２と直流安定
化部４の端子５とが接続され、端子３、端子１２
および直流安定化部４の端子６とが接続され、端
子１０と直流安定化部４の端子７とが接続され
る。また、直流安定化部４は安定化用電圧検出端
子８および過不足電圧検出用端子９を有し、本発
明の特徴とする切換制御部１５は端子１１に抵抗
器Ｐ１の一端が接続され、抵抗器Ｒ１の他端に
PNPトランジスタＱ１のコレクタが接続され、
端子１０にPNPトランジスタＱ１のエミツタが
接続され、抵抗器Ｒ２は端子１１と端子１２との
間に挿入され、抵抗器Ｒ３は端子１０と端子１４
との間に挿入され、端子１４に抵抗器Ｒ４の一端
が接続され、抵抗器Ｒ５は抵抗器Ｒ４の他端と
PNPトランジスタＱ１のベースとの間に挿入さ
れ、抵抗器Ｒ４の他端に比較器Ｚ１の出力が接続
され、端子１１に比較器Ｚ１の非反転入力が接続
され、端子１３に比較器Ｚ１の反転入力が接続さ
れ、端子８および９はPNPトランジスタＱ１の
コレクタに接続される。直流安定化電源回路PU
２の構成は前述の直流安定化電源回路PU１の構
成と同一である。また、ダイオードオア回路DU
１では、端子４１にダイオードーＤ４１のアノー
ドが接続され、端子４２，４３および４７にダイ
オード４１のカソードが接続され、端子４４にダ
イオードＤ４２のアーノードが接続され、端子４
２のダイオードＤ４２のカソードが接続され、端
子４７と端子４５，４６および４８との間にコン
デンサＣ４１が挿入される回路PU１、PU2およ
びDU１間は端子１０と端子４１、端子１１と端
子４２、端子１２と端子４５、端子１３と端子３
４、端子１４と端子３３、端子３０と端子４４、
端子３１と端子４３、端子３２と端子４６とがそ
れぞれ接続される。 External unregulated power supply 1 is a DC stabilized power supply circuit
The unregulated power supply 21 is inserted between the terminals 2 and 3 of the PU1, and the terminal 3 is connected to the common potential, and the unregulated power supply 21 is inserted between the terminals 22 and 23 of the DC stabilized power supply circuit PU2, and the terminal 23 is connected to the common potential. be done. Further, in the DC stabilizing power supply circuit PU1, the terminal 2 and the terminal 5 of the DC stabilizing section 4 are connected, and the terminal 3 and the terminal 12 are connected to each other.
and the terminal 6 of the DC stabilizing section 4 are connected, and the terminal 10 and the terminal 7 of the DC stabilizing section 4 are connected. Further, the DC stabilizing section 4 has a stabilizing voltage detection terminal 8 and an over/under voltage detection terminal 9, and the switching control section 15, which is a feature of the present invention, has one end of the resistor P1 connected to the terminal 11, At the other end of resistor R1
The collector of PNP transistor Q1 is connected to
The emitter of PNP transistor Q1 is connected to terminal 10, resistor R2 is inserted between terminal 11 and terminal 12, and resistor R3 is connected between terminal 10 and terminal 14.
, one end of resistor R4 is connected to terminal 14, and resistor R5 is connected to the other end of resistor R4.
The output of the comparator Z1 is connected to the other end of the resistor R4, the non-inverting input of the comparator Z1 is connected to the terminal 11, and the inverting input of the comparator Z1 is connected to the terminal 13. The inputs are connected, and terminals 8 and 9 are connected to the collector of PNP transistor Q1. DC stabilized power supply circuit PU
The configuration of 2 is the same as the configuration of the DC stabilized power supply circuit PU1 described above. Also, diode OR circuit DU
1, the anode of the diode D41 is connected to the terminal 41, the cathode of the diode 41 is connected to the terminals 42, 43 and 47, the anode of the diode D42 is connected to the terminal 44, and the terminal 4
The circuit in which the cathode of diode D42 of No. 2 is connected, and a capacitor C41 is inserted between terminal 47 and terminals 45, 46, and 48, is connected between terminal 10 and terminal 41, terminal 11 and terminal 42, and terminal 11 and terminal 42. 12 and terminal 45, terminal 13 and terminal 3
4, terminal 14 and terminal 33, terminal 30 and terminal 44,
Terminal 31 and terminal 43, and terminal 32 and terminal 46 are connected, respectively.
次に、この実施例装置の動作を第１図に基づい
て説明する。 Next, the operation of this embodiment device will be explained based on FIG.
直流安定化電源回路PU１およびPU２のダイオ
ード通過後電圧はそれぞれ単独に予めほぼ同じ電
圧値Ｖ、に設定されている。ここで、非安定化電
源１および２１がほぼ同時に直流安定化電源回路
PU１およびPU２に与えられると、直流安定化電
源回路PU１の出力電圧の立上がり時間が直流安
定化電源回路PU２の出力電圧の立上がり時間よ
り早ければ、ダイオードＤ４１が先に順バイアス
になつて、比較的Ｚ２１の反転入力の電位が非反
転入力より高くなるので、トランジスタQ21は導
通状態になり、したがつて直流安定化電源回路
PU２はダイオードＤ４２のアノード電位がカソ
ードとほぼ同電位となるように動作し、負荷４９
に対し直流供給が行われない。このときには、直
流安定化部２４の過不足電圧検出端子２９は直流
安定化電源回路PU２の出力端子３０の電位に接
続されている。一方、比較器Ｚ１の反転入力は比
較器Ｚ２１の出力により抵抗器Ｒ２４を介して低
レベルにもたらされるので、抵抗器Ｒ２３の抵抗
値を適切に選ぶと非反転入力よりもやや低くな
る。ここで、トランジスタＱ１は導通状態である
ので、直流安定化電源回路PU１はダイオードＤ
４１のカソードの電位が電圧値V3に一致するよ
うに動作し、負荷４９に対して直流を供給し現用
機となる。このときには、直流安定化部４の過不
足電圧検出端子９は抵抗器Ｒ２を通してダイオー
ドＤ４１のカソードすなわち負荷端に接続されて
いる。 The voltages after passing through the diodes of the DC stabilized power supply circuits PU1 and PU2 are independently set in advance to substantially the same voltage value V, respectively. Here, the unregulated power supplies 1 and 21 are almost simultaneously connected to the DC stabilized power supply circuit.
When applied to PU1 and PU2, if the rise time of the output voltage of the DC stabilized power supply circuit PU1 is earlier than the rise time of the output voltage of the DC stabilized power supply circuit PU2, the diode D41 becomes forward biased first, and the Since the potential of the inverting input of Z21 is higher than the non-inverting input, the transistor Q21 becomes conductive and therefore the DC stabilized power supply circuit
PU2 operates so that the anode potential of the diode D42 is approximately the same potential as the cathode, and the load 49
There is no direct current supply. At this time, the excess/deficiency voltage detection terminal 29 of the DC stabilizing section 24 is connected to the potential of the output terminal 30 of the DC stabilizing power supply circuit PU2. On the other hand, the inverting input of comparator Z1 is brought to a low level by the output of comparator Z21 via resistor R24, so that if the resistance value of resistor R23 is chosen appropriately, it will be slightly lower than the non-inverting input. Here, since the transistor Q1 is in a conductive state, the DC stabilized power supply circuit PU1 is connected to the diode D.
It operates so that the potential of the cathode 41 matches the voltage value V3, supplies direct current to the load 49, and becomes an active machine. At this time, the over/under voltage detection terminal 9 of the DC stabilizing section 4 is connected to the cathode of the diode D41, that is, the load end, through the resistor R2.
次に、現用機が何らかの故障により、負荷４９
に過電圧または不足電圧を与える状態になると直
流安定化部４はこれを検出し、直流安定化電源回
路PU１の電源出力を停止させる。これによりダ
イオードＤ４１のアノード電位は急速に降下する
が、ダイオードＤ４１のカソード電位はコンデン
サＣ１の蓄積する電荷の影響で徐々に降下する。
したがつて比較器Ｚ２１の反転入力電位が非反転
入力電位より低くなり、比較器Ｚ２１の出力がハ
イレベルになり、またトランジスタＱ２１は非導
通状態になり、直流安定化電源回路PU２はダイ
オードＤ４１のカソードの電位がＶ３となるよう
に動作を開始して、負荷４９に直接供給を行うと
もに、直流安定化部２４の過不足電圧検出端子２
９は抵抗器Ｒ２１を介して、ダイオードＤ４２の
カソードすなわち負荷端に接続される。 Next, due to some kind of failure in the current machine, a load of 49
When an overvoltage or an undervoltage is applied to the DC stabilizer 4, the DC stabilizing unit 4 detects this and stops the power output of the DC stabilized power supply circuit PU1. As a result, the anode potential of the diode D41 drops rapidly, but the cathode potential of the diode D41 gradually drops due to the influence of the charge accumulated in the capacitor C1.
Therefore, the inverting input potential of comparator Z21 becomes lower than the non-inverting input potential, the output of comparator Z21 becomes high level, transistor Q21 becomes non-conductive, and DC stabilized power supply circuit PU2 becomes lower than the non-inverting input potential. The operation is started so that the potential of the cathode becomes V3, and the load 49 is directly supplied.
9 is connected to the cathode, ie, the load end, of the diode D42 via the resistor R21.
以上説明したように、コンデンサＣ４１、抵抗
器Ｒ１，Ｒ２，Ｒ３，Ｒ４，Ｒ２１，Ｒ２２，Ｒ
２３およびＲ２４の値を適切に選ぶことにより、
負荷４９に対する現用機から予備機への切換え時
の過渡現象を抑制するとともに、過不足電圧検出
が現用機では負荷端で行われ、また、予備機では
その出力端で行える。なお、抵抗器Ｒ２およびＲ
２２は端子１１と端子４２または端子３１と端子
４３の間の接続が外れた場合でも比較器Ｚ１また
はＺ２１の非反転入力を低レベルにし、かつトラ
ンジスタＱ１またはＱ２１を導通状態にして直流
安定化電源回路PU１またはPU２の出力電圧の異
常上昇を阻止するもので抵抗器Ｒ２およびＲ２２
の抵抗器Ｒ１およびＲ２１の抵抗値よりも十分に
大きく設定される。 As explained above, capacitor C41, resistors R1, R2, R3, R4, R21, R22, R
By appropriately choosing the values of 23 and R24,
In addition to suppressing transient phenomena when switching from the working machine to the standby machine with respect to the load 49, over/under voltage detection is performed at the load end in the working machine, and at its output end in the standby machine. Note that resistors R2 and R
22 is a DC stabilized power supply that keeps the non-inverting input of the comparator Z1 or Z21 at a low level and makes the transistor Q1 or Q21 conductive even if the connection between the terminal 11 and the terminal 42 or the terminal 31 and the terminal 43 is disconnected. Resistors R2 and R22 are used to prevent an abnormal rise in the output voltage of circuit PU1 or PU2.
The resistance value of the resistors R1 and R21 is set to be sufficiently larger than that of the resistors R1 and R21.
この実施例装置ではトランジスタＱ１およびＱ
２１にPNP形トランジスタを用いているが非安
定化電源１の端子２および２１の端子２２が接地
される場合にはNPN形トランジスタを用いても
本発明を実施することができる。 In this embodiment device, transistors Q1 and Q
Although a PNP type transistor is used for 21, the present invention can also be implemented using an NPN type transistor if terminal 2 of unregulated power supply 1 and terminal 22 of 21 are grounded.
本発明は、以上説明したように、過不足電圧検
出および安定化制御用電圧検出を現用機は負荷端
で行い、予備機はその出力端で行つているため、
従来のように出力端と負荷端との間に挿入される
ダイオードおよび配線のための必要な動作余裕度
を小さくすることができる。ことため、動作余裕
度を大きくとることに起因する誤動作頻度の増加
や負荷装置の早期劣化あるいは損傷の発生を防止
できる。そして現用・予備切換時の負荷に対する
過渡変動を抑圧し、現用・予備のそれぞれの直流
安定化電源回路の出力電圧を正しく監視すること
ができるので電源異常時の負荷への影響を最少限
に止める効果がある。
As explained above, in the present invention, excess/deficiency voltage detection and stabilization control voltage detection are performed at the load end of the active machine, and at the output end of the standby machine.
The required operating margin for the diode and wiring inserted between the output end and the load end as in the conventional case can be reduced. Therefore, it is possible to prevent an increase in the frequency of malfunctions and early deterioration or damage to the load device due to a large operating margin. It also suppresses transient fluctuations in the load when switching between working and standby, and can accurately monitor the output voltage of the DC stabilized power supply circuits for both working and standby, minimizing the impact on the load when power supply abnormalities occur. effective.
第１図は本発明実施例装置の構成を示す接続
図。第２図は従来例装置の構成を示す接続図。
Ｃ４１……コンデンサ、Ｄ４１，Ｄ４２……ダ
イオード、DU１……ダイオードオア回路、PU
１，PU２……直流安定化電源回路、Ｑ１，Ｑ２
１……PNPトランジスタ、Ｒ１〜Ｒ５、Ｒ２１
〜Ｒ２５……抵抗器、Ｚ１，Ｚ２１……比較器、
１，２１……非安定化電源、２，３，５〜１４，
２２，２３，２５〜３４，４１〜４８……端子、
４，２４……直流安定化部、１５，３５……切換
制御部、４９……負荷。
FIG. 1 is a connection diagram showing the configuration of an apparatus according to an embodiment of the present invention. FIG. 2 is a connection diagram showing the configuration of a conventional device. C41...Capacitor, D41, D42...Diode, DU1...Diode OR circuit, PU
1, PU2...DC stabilized power supply circuit, Q1, Q2
1...PNP transistor, R1 to R5, R21
~R25...Resistor, Z1, Z21...Comparator,
1, 21...unregulated power supply, 2, 3, 5 to 14,
22, 23, 25-34, 41-48...terminals,
4, 24... DC stabilizing section, 15, 35... Switching control section, 49... Load.
Claims (1)
化電源回路を備え、 その二つの直流安定化電源回路にはそれぞれ、
外部直流電源の非接地側の端子に接続される入力
端子と、 この外部直流電源の接地側の端子および外部負
荷の接地側の端子に接続される接地端子と、 出力端子と、 過電圧および不足電圧を検出する第一の検出端
子と、 安定化電圧を検出する第二の検出端子と を含み、 上記各出力端子と、上記外部負荷の非接地側の
端子との間にそれぞれ出力電流の方向に順方向に
接続されたダイオード を備えた電源切換装置において、 上記二つの直流安定化電源回路には、それぞ
れ、上記第一の検出端子と上記第二の検出端子と
がそのコレクタに接続され、上記出力端子にその
エミツタが接続されたトランジスタと、 このトランジスタのコレクタと上記接地端子と
の間に挿入され、直列接続された第一の抵抗器お
よび第二の抵抗器と、 上記出力端子にその一端が接続された第三の抵
抗器と、 上記トランジスタのベースにその一端が接続さ
れた第五の抵抗器と、 この第五の抵抗器の他端と上記第三の抵抗器の
他端との間に挿入された第四の抵抗器と、 上記第一の抵抗器と上記第二の抵抗器との接続
点がその非反転入力に接続され、その出力が上記
第四の抵抗器と上記第五の抵抗器の接続点に接続
された比較器と を備え、 一方の直流安定化電源回路の比較器の反転入力
が他方の直流安定化電源回路の第三の抵抗器と第
四の抵抗器との接続点に接続され、 また、上記第一の抵抗器と上記第二の抵抗器の
接続点が上記負荷端子の他方の端子に接続された
ことを特徴とする電源切換装置。[Scope of Claims] 1. Two DC stabilized power supply circuits each including a DC stabilization section, each of the two DC stabilized power supply circuits having:
An input terminal connected to the non-grounded terminal of the external DC power supply, a grounding terminal connected to the grounded terminal of this external DC power supply and the grounded terminal of the external load, an output terminal, and overvoltage and undervoltage. a first detection terminal for detecting the stabilized voltage, and a second detection terminal for detecting the stabilized voltage; In a power switching device equipped with forward-connected diodes, each of the two DC stabilized power supply circuits has the first detection terminal and the second detection terminal connected to their collectors, and a transistor whose emitter is connected to the output terminal; a first resistor and a second resistor inserted in series between the collector of this transistor and the ground terminal; and one end of which is connected to the output terminal. a fifth resistor, one end of which is connected to the base of the transistor, and the other end of the fifth resistor connected to the other end of the third resistor. A fourth resistor inserted between the fourth resistor and the connection point between the first resistor and the second resistor are connected to its non-inverting input, and its output is connected to the fourth resistor and the second resistor. and a comparator connected to the connection point of the fifth resistor, and the inverting input of the comparator of one DC stabilized power supply circuit connects to the third resistor and fourth resistor of the other DC stabilized power supply circuit. A power supply switching device characterized in that the connection point between the first resistor and the second resistor is connected to the other terminal of the load terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59169053A JPS6149619A (en) | 1984-08-13 | 1984-08-13 | Power source switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59169053A JPS6149619A (en) | 1984-08-13 | 1984-08-13 | Power source switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6149619A JPS6149619A (en) | 1986-03-11 |
| JPH0524734B2 true JPH0524734B2 (en) | 1993-04-08 |
Family
ID=15879457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59169053A Granted JPS6149619A (en) | 1984-08-13 | 1984-08-13 | Power source switching device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6149619A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0468443U (en) * | 1990-10-22 | 1992-06-17 |
-
1984
- 1984-08-13 JP JP59169053A patent/JPS6149619A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6149619A (en) | 1986-03-11 |
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