JPH036728B2 - - Google Patents
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- Publication number
- JPH036728B2 JPH036728B2 JP59012237A JP1223784A JPH036728B2 JP H036728 B2 JPH036728 B2 JP H036728B2 JP 59012237 A JP59012237 A JP 59012237A JP 1223784 A JP1223784 A JP 1223784A JP H036728 B2 JPH036728 B2 JP H036728B2
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- Prior art keywords
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- turned
- relay
- time
- power supply
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- 238000001514 detection method Methods 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 230000003111 delayed effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- Supply And Distribution Of Alternating Current (AREA)
Description
【発明の詳細な説明】
〔技術分野〕
この発明は入力インピーダンスの小さい電気機
器に給電する電源回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a power supply circuit that supplies power to electrical equipment with low input impedance.
従来のこの種の電源回路は、第１図に示すよう
に、交流電源Ｅと負荷（電気機器）LDとの間に
電源スイツチSW1と突入電流制限用抵抗Ｒの直列
回路を介挿接続し、電源スイツチSW1と突入電流
制限用抵抗Ｒの直列回路の負荷LD側よりリレー
制御部CRに給電し、この制御部CRによつて開閉
制御される常開型のリレー接点ryを突入電流制限
用抵抗Ｒに並列に接続した構成であつた。
As shown in Figure 1, a conventional power supply circuit of this type has a series circuit of a power switch SW1 and an inrush current limiting resistor R inserted and connected between an AC power supply E and a load (electrical equipment) LD. , power is supplied to the relay control unit CR from the load LD side of the series circuit of the power switch SW 1 and the inrush current limiting resistor R, and the normally open relay contact RY, which is controlled to open and close by this control unit CR, limits the inrush current. The configuration was such that it was connected in parallel to the resistor R for use.
この電源回路は、第２図Ａに示すように、時刻
t1で電源スイツチSW1をオンにすると、この時は
まだリレー接点ryがオフであるので、交流電源Ｅ
から突入電流制限用抵抗Ｒを通して負荷LDへ給
電され、電源スイツチSW1のオン時よりリレー動
作遅れ時間tRONだけ遅れた時刻t2で第２図Ｂに示
すように、リレー接点ryがオンとなり、交流電源
Ｅから突入電流制限用抵抗Ｒを介さずにリレー接
点ryを通して負荷LDに給電される。このときの
リレー制御電圧VAは第２図Ｃに示すように変化
する。 This power supply circuit, as shown in Figure 2A,
When power switch SW 1 is turned on at t 1 , relay contact ry is still off at this time, so AC power supply E is turned on.
Power is supplied to the load LD through the inrush current limiting resistor R, and at time t2 , which is delayed by the relay operation delay time tRON from when the power switch SW1 is turned on, the relay contact ry turns on as shown in Figure 2B. , power is supplied from the AC power supply E to the load LD through the relay contact ry without passing through the inrush current limiting resistor R. At this time, the relay control voltage V A changes as shown in FIG. 2C.
その後の時刻t3で電源スイツチSW1をオフにす
ると負荷LDへの給電が停止する。この後リレー
制御電圧VAが第２図Ｃのように徐々に下降し、
リレー制御部CR固有の電源立下がり時間による
リレーオフ遅れ時間tdOFF（リレー制御電圧VAがリ
レー保持電圧VRまで下降するまでの時間）とリ
レーがもつ固有の復帰時間tROFFとの和だけ遅れた
時刻t4でリレー接点ryがオフとなる。 After that, when the power switch SW1 is turned off at time t3 , the power supply to the load LD is stopped. After this, the relay control voltage V A gradually decreases as shown in Figure 2C,
Delayed by the sum of the relay off delay time t dOFF (the time it takes for the relay control voltage V A to drop to the relay holding voltage V R ) due to the power supply fall time unique to the relay control unit CR and the relay's unique return time t ROFF At time t4 , relay contact ry turns off.
このように、この電源回路は、第３図Ａに示す
電源スイツチSW1のオンより第３図Ｂに示すリレ
ー接点ryがリレー動作遅れ時間tRONだけ遅れてオ
ンとなるため、このときに負荷LDに流れ込む入
力電流は例えば第３図Ｃのようになり、突入電流
制限用抵抗Ｒで突入電流がレベルL1に制限され、
電源投入時の突入電流を少なく抑えることができ
る。 In this way, in this power supply circuit, the relay contact ry shown in Figure 3B is turned on after the relay operation delay time t RON is turned on after the power switch SW 1 shown in Figure 3A is turned on. The input current flowing into the LD is as shown in Figure 3C, for example, and the inrush current is limited to level L1 by the inrush current limiting resistor R.
Inrush current when the power is turned on can be suppressed to a low level.
しかしながら、交流電源Ｅの瞬時停電があつた
場合や電源スイツチSW1を瞬時的にオフにした場
合などにおいて、給電停止時間txが（tdOFF＋
tROFF）より短いものであり、かつ負荷電源の立上
がりが速い場合に、リレー接点ryがオフとなる前
に電源復帰が行われ（突入電源制限が全く行われ
ない）、電源復帰後負荷LDに大きな突入電流（レ
ベルL2）が流入し、負荷LDの電子部品を破壊し
たり、また電源スイツチSW1の接点の摩耗を早め
るという問題があつた。 However, in cases such as when there is a momentary power outage of AC power supply E or when power switch SW 1 is momentarily turned off, the power supply stop time t x becomes (t dOFF +
t ROFF ) and the load power rises quickly, the power is restored before the relay contact ry turns off (no inrush power limitation is performed), and after the power is restored, the load LD There was a problem that a large inrush current (level L 2 ) flows in, destroying the electronic components of the load LD and accelerating the wear of the contacts of the power switch SW1 .
この発明は電源瞬時オフ時においても突入電流
を確実に制限することができる電源回路を提供す
ることを目的とする。
An object of the present invention is to provide a power supply circuit that can reliably limit rush current even when the power supply is momentarily turned off.
この発明の電源回路は、電源と、この電源と負
荷との間に介挿接続した電源スイツチおよび突入
電流制限用抵抗の直列回路と、この突入電流制限
用抵抗に並列接続した短絡スイツチと、前記電源
スイツチの負荷側より給電され給電開始後一定時
間経過して前記短絡スイツチをオフからオンに切
換える制御部と、前記負荷への給電停止を検出し
て少くとも一定時間前記短絡スイツチを強制的に
オフにするように前記制御部に信号を与える瞬時
停電検出部とを備える構成にしたことを特徴とす
る。
The power supply circuit of the present invention includes a power supply, a series circuit of a power switch and an inrush current limiting resistor interposed and connected between the power supply and a load, a shorting switch connected in parallel to the inrush current limiting resistor, and the short circuit switch connected in parallel to the inrush current limiting resistor. A control unit that is supplied with power from the load side of the power switch and switches the shorting switch from off to on after a predetermined period of time has elapsed after the start of power supply; The present invention is characterized in that it is configured to include a momentary power failure detection section that gives a signal to the control section to turn off the control section.
この発明の一実施例を第４図および第５図に基
づいて説明する。この電源回路は、第４図に示す
ように、交流電源Ｅに電源スイツチSW1および突
入電流制限用抵抗Ｒの直列回路を介して負荷LD
を接続し、電源スイツチSW1および突入電流制限
用抵抗Ｒの直列回路の負荷LD側よりリレー制御
部CTおよび瞬時停電検出部DTに給電し、リレ
ー制御部CTによつてオンオフ制御される常開型
のリレー接点ryを突入電流制限用抵抗Ｒに並列に
接続し、瞬時停電検出部DTによつてリレー制御
部CTを制御するようにしている。 An embodiment of the present invention will be described based on FIGS. 4 and 5. As shown in Fig. 4, this power supply circuit connects a load LD to an AC power supply E through a series circuit of a power switch SW1 and an inrush current limiting resistor R.
is connected, power is supplied from the load LD side of the series circuit of power switch SW 1 and inrush current limiting resistor R to the relay control unit CT and instantaneous power failure detection unit DT, and the normally open state is controlled on and off by the relay control unit CT. The type relay contact ry is connected in parallel to the inrush current limiting resistor R, and the instantaneous power failure detection section DT controls the relay control section CT.
この場合、リレー制御部CTは、交流電源Ｅの
投入後または瞬時停電回復後一定時間（負荷LD
への入力電流が安定するのに必要な時間）遅れて
常開型のリレー接点ryをオンにして突入電流を制
限するようになつている。 In this case, the relay control unit CT operates for a certain period of time (load LD
After a delay (the time required for the input current to stabilize), the normally open relay contact RY is turned on to limit the inrush current.
また、瞬時停電検出回路DTは、交流電源Ｅの
瞬時停電（電源スイツチSW1の瞬時オフも含む）
を検出してリレー制御部CTに信号を与えること
によりリレー接点ryを電源オフ後一定時間ｔだけ
強制的にOFFにさせるようになつている。この
時間ｔは、瞬時停電発生後リレー制御部CTが動
作できなくなるまでの時間txに設定している。 In addition, the instantaneous power failure detection circuit DT detects instantaneous power failure of AC power supply E (including instantaneous off of power switch SW 1 ).
By detecting this and giving a signal to the relay control unit CT, the relay contact ry is forcibly turned off for a certain period of time t after the power is turned off. This time t is set to the time t x from when the instantaneous power outage occurs until the relay control unit CT becomes inoperable.
第５図は第４図の回路におけるリレー制御部
CTと瞬時停電検出部DTの具体回路図を示して
いる。第５図において、TRはトランス、DBは
全波整流器、C1，C2はコンデンサ、R1〜R6は抵
抗、ZDはツエナーダイオード、OPは比較器、Di
はダイオード、Ｑはトランジスタ、RYはリレー
である。 Figure 5 shows the relay control section in the circuit shown in Figure 4.
A specific circuit diagram of the CT and instantaneous power failure detection unit DT is shown. In Figure 5, TR is a transformer, DB is a full-wave rectifier, C 1 and C 2 are capacitors, R 1 to R 6 are resistors, ZD is a Zener diode, OP is a comparator, and D i
is a diode, Q is a transistor, and RY is a relay.
つぎに、この回路の動作を説明する。電源投入
されると、トランスTRおよび全波整流器DBを
通してコンデンサC1が充電され、このコンデン
サC1が比較器OPおよびリレーRYの駆動電源と
なる。コンデンサC1の充電が進んでその電圧VC1
が上昇し、電圧VC1を抵抗R1，R2で分圧した電圧
R1／R1＋R2VC1がツエナーダイオードZDの電圧VZD
に対し、
VZD＜R2／R1＋R2VC1
となると、比較器OPの出力が低レベルから高レ
ベルに変化してトランジスタＱがオンとなり、リ
レーRYが励磁されてリレー接点ryがオフからオ
ンに切換わる。また、電源遮断されると、電圧
VC1が徐々に降下し、
VZD＞R2／R1＋R2VC1
となつたときに比較器OPの出力が高レベルから
低レベルに変化してトランジスタＱがオフとな
り、リレーRYが励磁が停止し、リレー接点ryが
オフとなる。なお、上記動作はコンデンサC2、
ダイオードDi、抵抗R4，R5よりなる瞬時停電検
出部DTがない場合のリレー制御部CTのみの動
作である。 Next, the operation of this circuit will be explained. When the power is turned on, capacitor C1 is charged through transformer TR and full-wave rectifier DB, and this capacitor C1 becomes the driving power source for comparator OP and relay RY. As capacitor C1 is charged, its voltage V C1
increases, and the voltage obtained by dividing the voltage V C1 by resistors R 1 and R 2
When R 1 /R 1 +R 2 V C1 becomes V ZD <R 2 /R 1 +R 2 V C1 with respect to the voltage V ZD of the Zener diode ZD, the output of the comparator OP changes from low level to high level. Transistor Q turns on, relay RY is energized, and relay contact ry switches from off to on. Also, when the power is cut off, the voltage
When V C1 gradually drops and becomes V ZD > R 2 / R 1 + R 2 V C1 , the output of comparator OP changes from high level to low level, transistor Q turns off, and relay RY is energized. stops, and relay contact ry turns off. Note that the above operation is performed using capacitor C 2 ,
This is the operation of only the relay control unit CT when there is no instantaneous power failure detection unit DT consisting of a diode D i and resistors R 4 and R 5 .
上記コンデンサC2、ダイオードDi、抵抗R4，
R5よりなる瞬時停電検出部DTが接続され、かつ
抵抗R5の値を大きく、かつ抵抗R4の値およびコ
ンデンサC2の容量を小さく設定しているとする
と、Ａ点の電位VAは、電源オン時にゆるやかに
上昇し、電源オフ後VZD＜VAとなるまでの期間
（負荷LDへの入力電流が安定するまでの期間）ト
ランジスタＱがオンとはならず、したがつてリレ
ーRYも励磁されず、リレー接点ryがオフとなつ
ているので、負荷LDへの入力電流は突入電流制
限用抵抗Ｒを通して流れ、電源オン時の突入電流
は十分抑制される。その後、コンデンサC2の充
電が進み、VZD＜VAとなると、トランジスタＱが
オンとなつてリレーRYが励磁され、リレー接点
ryがオンとなり、負荷LDへの入力電流がリレー
接点ryを通して流れることになる。 Above capacitor C 2 , diode D i , resistor R 4 ,
Assuming that the instantaneous power failure detection unit DT consisting of R5 is connected, and the value of resistor R5 is set large and the value of resistor R4 and the capacitance of capacitor C2 are set small, the potential V A at point A is , rises slowly when the power is turned on, and after the power is turned off until V ZD < V A (the period until the input current to the load LD stabilizes), the transistor Q does not turn on, and therefore the relay RY is not excited and the relay contact ry is off, so the input current to the load LD flows through the inrush current limiting resistor R, and the inrush current when the power is turned on is sufficiently suppressed. After that, charging of capacitor C 2 progresses and when V ZD < V A , transistor Q is turned on and relay RY is energized, and the relay contact
ry turns on, and the input current to the load LD flows through the relay contact ry.
一方、電源オフとなると、コンデンサC2の電
荷が急激に放電され、電圧VAが急激に降下し、
電源オフ後ただちにトランジスタＱがオフとなつ
てリレーRYの励磁が停止し、リレー接点ryが強
制的にオフとなる。 On the other hand, when the power is turned off, the charge in capacitor C 2 is rapidly discharged, and the voltage V A drops rapidly.
Immediately after the power is turned off, transistor Q is turned off, excitation of relay RY is stopped, and relay contact ry is forcibly turned off.
このように構成した結果、交流電源Ｅの瞬時停
電や電源スイツチSW1の瞬時オフによる電源瞬時
オフがあつても、電源オフ後ただちにリレー接点
ryがオフとなり、電源回復後一定時間経過してリ
レー接点ryがオンとなるため、負荷LDへ流れ込
む突入電流を確実に抑制することができる。その
結果、負荷LDの電子部品の破壊や電源スイツチ
SW1の接点消耗を少くできる。 As a result of this configuration, even if the power is momentarily turned off due to a momentary power outage of AC power supply E or momentary turning off of power switch SW 1 , the relay contact will be connected immediately after the power is turned off.
ry is turned off, and the relay contact ry is turned on after a certain period of time after the power is restored, making it possible to reliably suppress the inrush current flowing into the load LD. As a result, the electronic components of the load LD may be damaged or the power switch may be damaged.
SW 1 contact wear can be reduced.
なお、上記実施例では機械式のリレーRYおよ
びリレー接点ryを用いたが、これに代えて半導体
スイツチを用いてもよい。また、電源オフの検出
は電源電圧の変動によつて検出したが、電源スイ
ツチSW1に連動する補助スイツチによつて検出す
るようにしてもよい。 Note that in the above embodiment, a mechanical relay RY and a relay contact ry are used, but a semiconductor switch may be used instead. Further, although the power off is detected by the fluctuation of the power supply voltage, it may be detected by an auxiliary switch linked to the power switch SW1 .
この発明の他の実施例を第６図および第７図に
基づいて説明する。この電源回路は、第６図に示
すように第５図におけるコンデンサC2、抵抗R4，
R5に代えて、瞬時停電検出回路Ｂおよび信号保
持回路Ｃを用いたものである。瞬時停電検出回路
Ｂは電源電圧の変動により電源瞬時オフを検出す
るか、または電源スイツチSW1のオンオフによつ
て電源瞬時オフを検出するようになつている。信
号保持回路Ｃは瞬時停電検出回路Ｂからの瞬時停
電検出信号を受けてそれを時間ｔだけ保持するも
ので、例えば単安定マルチバイブレータで構成さ
れる。 Another embodiment of the invention will be described based on FIGS. 6 and 7. As shown in FIG. 6, this power supply circuit includes the capacitor C 2 , resistor R 4 ,
In place of R5 , a momentary power failure detection circuit B and a signal holding circuit C are used. The instantaneous power failure detection circuit B is designed to detect instantaneous OFF of the power supply based on fluctuations in the power supply voltage or to detect instantaneous OFF of the power supply by turning the power switch SW1 on and off. The signal holding circuit C receives the momentary power failure detection signal from the momentary power failure detection circuit B and holds it for a time t, and is composed of, for example, a monostable multivibrator.
つぎに、この回路の動作を説明する。電源投入
すると、トランスTRおよび全波整流器DBを通
してコンデンサC1が充電され、
VZD＜R2／R1＋R2VC1
となつたときに、比較器OPの出力が高レベルと
なつてトランジスタＱがオンとなり、リレーRY
が励磁されてリレー接点ryがオンとなる。この場
合、電源投入後リレー接点ryがオンとなるまでの
時間が負荷LDへの入力電流が安定するまでの時
間より長くなるように回路の時定数を設定する。
このように構成すると、電源投入直後はリレー接
点ryがオフで入力電流が突入電流制限用抵抗Ｒを
通して流れ、入力電流が安定するとリレー接点ry
を通して入力電流が流れることになり、電源投入
時の突入電流を低減することができる。なお、比
較器OPの出力が高レベルとなる時期はコンデン
サC1の電圧VC1がリレーRYの動作電圧V1を越え
る時期より遅れるように設定している。 Next, the operation of this circuit will be explained. When the power is turned on, capacitor C 1 is charged through transformer TR and full-wave rectifier DB, and when V ZD < R 2 /R 1 + R 2 V C1 , the output of comparator OP becomes high level and transistor Q turns on and relay RY
is excited and relay contact ry turns on. In this case, the time constant of the circuit is set so that the time it takes for relay contact ry to turn on after the power is turned on is longer than the time it takes for the input current to the load LD to stabilize.
With this configuration, immediately after the power is turned on, relay contact ry is off and the input current flows through the inrush current limiting resistor R, and when the input current stabilizes, relay contact ry is off.
The input current will flow through the capacitor, reducing inrush current when the power is turned on. Note that the timing at which the output of the comparator OP becomes high level is set to be delayed from the timing at which the voltage V C1 of the capacitor C 1 exceeds the operating voltage V 1 of the relay RY.
つぎに、電源の瞬時オフが生じた場合について
説明する。電源の瞬時オフが生じると、瞬時停電
検出回路Ｂがそれを検出して信号保持回路Ｃに伝
える。信号保持回路Ｃはそれを受けて、電源があ
る限り時間ｔだけトランジスタＱのベースを強制
的に低レベルとしてトランジスタＱを強制遮断
し、リレーRYの励磁を停止してリレー接点ryを
オフにする。 Next, a case where the power supply is momentarily turned off will be explained. When the power is momentarily turned off, the momentary power failure detection circuit B detects it and transmits it to the signal holding circuit C. In response to this, the signal holding circuit C forcibly sets the base of the transistor Q to a low level for a time t as long as the power is available, forcibly shuts off the transistor Q, stops excitation of the relay RY, and turns off the relay contact ry. .
今、瞬時停電時間をtyとすると、ｔ＜tyのとき
は、電源復帰時は明らかにリレー接点ryがオフと
なつており、突入電流は低減される。 Now, assuming that the instantaneous power outage time is t y , when t<t y , the relay contact ry is clearly off when the power is restored, and the inrush current is reduced.
ｔ＝tyのときは、電源復帰時はリレー接点ryが
オフとなつており、突入電流は低減できる。 When t=t y , the relay contact ry is off when the power is restored, and the inrush current can be reduced.
ｔ＞tyのときは、VZD＜R2／R1＋R2VC1となるまで
に入力電流は安定しており、突入電流は低減でき
る。 When t>t y , the input current is stable by the time V ZD <R 2 /R 1 +R 2 V C1 , and the rush current can be reduced.
すなわち、強制的にリレー接点ryをオフにする
時間ｔを電源オフ後電圧VC1が信号保持回路Ｃが
動作可能下限電圧まで低下するに必要な時間とす
ることにより、電源の瞬時的なオン−オフ−オン
が生じても突入電流が確実に低減される。 That is, by setting the time t for forcibly turning off the relay contact ry to the time required for the voltage V C1 after the power is turned off to drop to the lower limit voltage at which the signal holding circuit C can operate, the power can be turned on instantaneously. Even if off-on occurs, inrush current is reliably reduced.
第７図は瞬時停電時間tyとリレー接点ryの遮断
時間ｔとが等しいときのタイムチヤートを示して
いる。同図Ａは電源スイツチSW1のオンオフ状態
を示し、同図ＢはコンデンサC1の電圧VC1（制御
部電源）を示し、同図Ｃはリレー接点ryのオンオ
フ状態を示している。 FIG. 7 shows a time chart when the instantaneous power outage time t y and the cut-off time t of the relay contact ry are equal. Figure A shows the on/off state of the power switch SW1 , Figure B shows the voltage V C1 (control unit power supply) of the capacitor C1 , and Figure C shows the on/off state of the relay contact ry.
図において、時刻t1で電源投入すると、電圧
VC1が徐々に上昇し、リレーRYの動作電圧V1を
越え、さらにVZD＜R2／R1＋R2VC1となる電圧V2を
越えると（時刻t2）、リレー接点ryがオンとなる。
その後、時刻t3で瞬時停電が起こると、電圧VC1
が徐々に低下し、動作可能下限電圧V3による時
刻t4までの時間ｔの間信号保持回路Ｃがリレー接
点ryを強制的にオフにする。時刻t4で電源が回復
すると電圧VC1が徐々に上昇し、電圧VC1がVZD＜
R2／R1＋R2VC1となる時刻t5でリレー接点ryがオン
となる。この場合に、時間t5−t4が負荷LDへの入
力電流が安定するのに必要な時間より長くなるよ
うに電圧VC1の上昇時定数を定めている。 In the figure, when the power is turned on at time t 1 , the voltage
When V C1 gradually increases and exceeds the operating voltage V 1 of the relay RY, and further exceeds the voltage V 2 such that V ZD < R 2 / R 1 + R 2 V C1 (time t 2 ), the relay contact ry turns on. becomes.
Then, when a momentary power failure occurs at time t3 , the voltage V C1
gradually decreases, and the signal holding circuit C forcibly turns off the relay contact ry for a time t until time t 4 based on the lower limit voltage V 3 for operation. When the power is restored at time t4 , the voltage V C1 gradually increases until the voltage V C1 becomes V ZD <
Relay contact ry turns on at time t5 when R 2 /R 1 +R 2 V C1 . In this case, the rise time constant of the voltage V C1 is determined so that the time t 5 −t 4 is longer than the time required for the input current to the load LD to stabilize.
このように、電源投入時および電源瞬時オフ時
に突入電流を確実に低減することができるので、
電子部品の破壊や電源スイツチSW1の接点消耗を
防止することができる。 In this way, inrush current can be reliably reduced when the power is turned on and when the power is momentarily turned off.
This can prevent destruction of electronic components and wear out of the contacts of power switch SW1 .
〔発明の効果〕
この発明の電源回路によれば、電源投入時およ
び電源瞬時オフ時に突入電流を確実に低減するこ
とができ、電子部品の破壊や電源スイツチの接点
消耗を防止できる。[Effects of the Invention] According to the power supply circuit of the present invention, inrush current can be reliably reduced when the power is turned on and instantaneously turned off, and damage to electronic components and wear and tear of the contacts of the power switch can be prevented.
第１図は従来の電源回路のブロツク図、第２図
および第３図はその動作説明のたの波形図、第４
図はこの発明の一実施例のブロツク図、第５図は
その具体回路図、第６図はこの発明の他の実施例
の回路図、第７図はその動作説明のための波形図
である。
Ｅ……交流電源、SW1……電源スイツチ、Ｒ…
…突入電流制限用抵抗、ry……リレー接点、CT
……リレー制御部、DT……瞬時停電検出部。
Figure 1 is a block diagram of a conventional power supply circuit, Figures 2 and 3 are waveform diagrams for explaining its operation, and Figure 4 is a block diagram of a conventional power supply circuit.
The figure is a block diagram of one embodiment of this invention, FIG. 5 is a specific circuit diagram thereof, FIG. 6 is a circuit diagram of another embodiment of this invention, and FIG. 7 is a waveform diagram for explaining its operation. . E...AC power supply, SW 1 ...Power switch, R...
...Inrush current limiting resistor, ry...Relay contact, CT
...Relay control section, DT...Momentary power failure detection section.
Claims (1)
た電源スイツチおよび突入電流制限用抵抗の直列
回路と、この突入電流制限用抵抗に並列接続した
短絡スイツチと、前記電源スイツチの負荷側より
給電され給電開始後一定時間経過して前記短絡ス
イツチをオフからオンに切換える制御部と、前記
負荷への給電停止を検出して少くとも一定時間前
記短絡スイツチを強制的にオフにするように前記
制御部に信号を与える瞬時停電検出部とを備えた
電源回路。1. A series circuit of a power switch and an inrush current limiting resistor interposed and connected between a power source and the load of this power source, a short circuit switch connected in parallel to this inrush current limiting resistor, and a series circuit from the load side of the power source switch. a control unit that switches the shorting switch from off to on after a predetermined period of time has elapsed after power is supplied; A power supply circuit equipped with an instantaneous power failure detection section that provides a signal to a control section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59012237A JPS60156225A (en) | 1984-01-25 | 1984-01-25 | Power source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59012237A JPS60156225A (en) | 1984-01-25 | 1984-01-25 | Power source circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60156225A JPS60156225A (en) | 1985-08-16 |
| JPH036728B2 true JPH036728B2 (en) | 1991-01-30 |
Family
ID=11799759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59012237A Granted JPS60156225A (en) | 1984-01-25 | 1984-01-25 | Power source circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60156225A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02231922A (en) * | 1989-03-02 | 1990-09-13 | Fanuc Ltd | Inrush current prevention system for motor driver upon recovery from instantaneous power interruption |
| JP2009159400A (en) * | 2007-12-27 | 2009-07-16 | Aiphone Co Ltd | Intercom device |
| US10418915B2 (en) | 2015-03-31 | 2019-09-17 | Mitsubishi Electric Corporation | Refrigeration cycle apparatus |
| JP7228760B2 (en) * | 2019-01-10 | 2023-02-27 | パナソニックＩｐマネジメント株式会社 | Transmitting device, receiving device, transmission system and transmission method |
-
1984
- 1984-01-25 JP JP59012237A patent/JPS60156225A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60156225A (en) | 1985-08-16 |
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