JPH0735236Y2 - Inrush current prevention circuit - Google Patents
Inrush current prevention circuitInfo
- Publication number
- JPH0735236Y2 JPH0735236Y2 JP1986190287U JP19028786U JPH0735236Y2 JP H0735236 Y2 JPH0735236 Y2 JP H0735236Y2 JP 1986190287 U JP1986190287 U JP 1986190287U JP 19028786 U JP19028786 U JP 19028786U JP H0735236 Y2 JPH0735236 Y2 JP H0735236Y2
- Authority
- JP
- Japan
- Prior art keywords
- contact
- resistor
- circuit
- capacitor
- inrush current
- 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
- 230000002265 prevention Effects 0.000 title claims description 13
- 239000003990 capacitor Substances 0.000 claims description 24
- 238000010586 diagram Methods 0.000 description 3
- 101710187795 60S ribosomal protein L15 Proteins 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Keying Circuit Devices (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、電源入力回路の突入電流防止回路に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a rush current prevention circuit for a power input circuit.
［従来の技術］ 従来の突入電流防止回路の一例を第２図に示す。第２図
において、サーキットブレーカ10が投入されると、コン
デンサC10は電流制限用の抵抗R10によって突入電流を制
限されながら入力電源電圧Einまで充電される。同時
に、コンデンサC20も抵抗R20を介して充電され、コンデ
ンサC20の両端電圧VC2がトランジスタ20のベース・エミ
ッタ間電圧VBEと定電圧ダイオード30のツエナー電圧VZ
の和よりも大きくなると、トランジスタ20がオンにな
り、それにより継電器RL10が動作し、電流制限用抵抗R1
0を短絡する。ここで、C20の充電時間はC10の充電時間
に比較して十分長くとる。[Prior Art] An example of a conventional inrush current prevention circuit is shown in FIG. In FIG. 2, when the circuit breaker 10 is turned on, the capacitor C10 is charged to the input power supply voltage E in while limiting the inrush current by the current limiting resistor R10. At the same time, the capacitor C20 is also charged through the resistor R20, and the voltage V C2 across the capacitor C20 becomes the base-emitter voltage V BE of the transistor 20 and the zener voltage V Z of the constant voltage diode 30.
Transistor 20 turns on, which causes relay RL10 to operate and current limiting resistor R1
Short 0. Here, the charging time of C20 is set to be sufficiently longer than the charging time of C10.
［解決すべき問題点］ しかしながら、上述した従来の突入電流防止回路は、サ
ーキットブレーカ10が投入されている間コンデンサC20
は充電されたままであり、サーキットブレーカ10を断と
してもその放電時定数とコンデンサC10の電荷によりト
ランジスタ20がオフとなるのに時間を要し、その間継電
器RL10の接点は閉じたままであり、接点が開放になる以
前にサーキットブレーカ10が再投入された場合、突入電
流防止回路が役目を果さないという欠点がある。[Problems to be solved] However, the above-described conventional inrush current prevention circuit is configured so that the capacitor C20 is provided while the circuit breaker 10 is turned on.
Is still charged, and even if the circuit breaker 10 is disconnected, it takes time for the transistor 20 to turn off due to its discharge time constant and the charge of the capacitor C10, while the contact of the relay RL10 remains closed and the contact If the circuit breaker 10 is turned on again before it is opened, the inrush current prevention circuit does not work.
［問題点の解決手段］ 上記従来の問題点を解決する本考案は、入力電源の一端
がサーキットブレーカと第１の抵抗を介してコンデンサ
に印加される電源入力回路の突入電流防止回路におい
て、該サーキットブレーカの補助接点の一端が該抵抗の
結合点に接続され、他端が継電器、トランジスタの直列
回路および２つの抵抗の直列回路を介して上記入力電源
の他の一端に接続され、該２つの抵抗の結合点が定電圧
ダイオードを介して該トランジスタのベース端子に接続
され、また、該継電器の一方の接点であるメイク接点が
第１の抵抗の両端に接続され、他の接点であるブレーク
接点とコンデンサの直列回路が上記２つの抵抗のうち一
方の抵抗の両端に接続され、かつ他方の接点であるメイ
ク接点が抵抗を介して上記コンデンサと直列回路を成す
ように構成してなる。[Means for Solving Problems] The present invention which solves the above-mentioned conventional problems includes a rush current prevention circuit for a power supply input circuit in which one end of an input power supply is applied to a capacitor through a circuit breaker and a first resistor. One end of the auxiliary contact of the circuit breaker is connected to the connection point of the resistor, and the other end is connected to the other end of the input power source through a relay, a series circuit of transistors and a series circuit of two resistors, The connection point of the resistor is connected to the base terminal of the transistor via a constant voltage diode, the make contact that is one contact of the relay is connected to both ends of the first resistor, and the break contact that is the other contact. A series circuit of a capacitor and a capacitor is connected to both ends of one of the two resistors, and a make contact, which is the other contact, forms a series circuit with the capacitor through the resistor. It is configured to
［実施例］ 以下、本考案の一実施例について図面を参照して詳細に
説明する。[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
第１図は本考案の一実施例に係る突入電流防止回路の回
路構成図である。図において、入力電源Einがサーキッ
トブレーカ１と抵抗R1を介してコンデンサC1に印加さ
れ、サーキットブレーカ１の補助接点の一端はサーキッ
トブレーカ１と抵抗R1の結合点に接続され、他端は継電
器RL1、トランジスタ２の直列回路および抵抗R2,R3の直
列回路を介して入力電源Einの他の一端に接続される。
また、抵抗R2,R3の結合点が定電圧ダイオード３を介し
てトランジスタ２のベース端子に接続され、継電器RL1
の接点ｒ１−１のメイク接点が抵抗R1の両端に接続さ
れる。更に、継電器RL1の他の接点ｒ１−２のブレー
ク接点とコンデンサC2の直列回路が抵抗R3の両端に接続
され、かつ、接点ｒ１−２のメイク接点が抵抗R4を介
してコンデンサC2と直列回路を成すように構成されてい
る。FIG. 1 is a circuit configuration diagram of an inrush current prevention circuit according to an embodiment of the present invention. In the figure, the input power source E in is applied to the capacitor C1 via the circuit breaker 1 and the resistor R1, one end of the auxiliary contact of the circuit breaker 1 is connected to the connection point of the circuit breaker 1 and the resistor R1, and the other end is the relay RL1. , And is connected to the other end of the input power supply E in via the series circuit of the transistor 2 and the series circuit of the resistors R2 and R3.
Further, the connection point of the resistors R2 and R3 is connected to the base terminal of the transistor 2 via the constant voltage diode 3, and the relay RL1
The make contact of the contact r1-1 is connected to both ends of the resistor R1. Further, a series circuit of the break contact of the other contact r1-2 of the relay RL1 and the capacitor C2 is connected to both ends of the resistor R3, and a make contact of the contact r1-2 forms a series circuit with the capacitor C2 via the resistor R4. Is configured to make.
サーキットブレーカ１が投入されると、コンデンサC1は
突入電流制限用の抵抗R1を介して入力電源電圧Einまで
充電される。一方、コンデンサC2はサーキットブレーカ
１の投入で補助接点が閉じることにより、抵抗R2と継電
器RL1の接点ｒ１−２のブレーク接点を介して充電さ
れる。コンデンサC2の両端電圧VC2がトランジスタ２の
ベース・エミッタ間電圧VBEと定電圧ダイオード３のツ
エナー電圧VZの和よりも大きくなると、トランジスタ２
がオンとなり継電器RL1が動作する。これにより、接点
ｒ１−１は抵抗R1を短絡し、接点ｒ１−２は抵抗R4
側に切替わってコンデンサC2の電荷を放電する。When the circuit breaker 1 is turned on, the capacitor C1 is charged to the input power supply voltage E in via the inrush current limiting resistor R1. On the other hand, the capacitor C2 is charged through the resistor R2 and the break contact of the contact r1-2 of the relay RL1 by closing the auxiliary contact when the circuit breaker 1 is turned on. When the voltage V C2 across the capacitor C2 exceeds the sum of the base-emitter voltage V BE of the transistor 2 and the zener voltage V Z of the constant voltage diode 3, the transistor 2
Turns on and relay RL1 operates. As a result, the contact r1-1 short-circuits the resistor R1 and the contact r1-2 shorts the resistor R4.
It switches to the side to discharge the electric charge of the capacitor C2.
ここで、コンデンサC1の充電時定数をt1，コンデンサC2
の充電時定数および放電時定数をt2，t3とすると、それ
ぞれ次の関係式が成立するように各定数を選んであるも
のとする。Here, the charging time constant of the capacitor C1 is t 1 , and the capacitor C2 is
Let t 2 and t 3 be the charging time constant and the discharging time constant, respectively, and it is assumed that the respective constants are selected so that the following relational expressions hold.
t3≪t1≪t2 次にサーキットブレーカ１を断にした場合の動作を説明
する。サーキットブレーカ１を断にすると、補助接点が
開放になり印加電圧が零になるために、継電器RL1は直
ちに復帰し、接点ｒ１−1,r１−２は元の状態に戻
る。そして、引き続きサーキットブレーカ１が再投入さ
れた場合でもコンデンサC2はすでに放電されており、接
点ｒ１−１も開放になっているために常に突入電流防
止回路が動作する状態にある。t 3 << t 1 << t 2 Next, the operation when the circuit breaker 1 is disconnected will be described. When the circuit breaker 1 is turned off, the auxiliary contact is opened and the applied voltage becomes zero, so that the relay RL1 immediately returns and the contacts r1-1 and r1-2 return to their original states. Even if the circuit breaker 1 is subsequently turned on again, the capacitor C2 has already been discharged and the contact r1-1 is also open, so that the inrush current prevention circuit is always in operation.
［考案の効果］ 以上説明したように本考案によれば、突入電流制限用の
抵抗を短絡する接点の動作時間を制御する回路の電源を
サーキットブレーカの補助接点を介して供給するように
し、更に継電器の別の接点により継電器の動作中に継電
器動作時間制御用のコンデンサの電荷を放電させること
により、サーキットブレーカが投入から断にされ、更に
断から再投入された場合でも、常に突入電流防止回路が
その機能を果すことができる効果がある。[Effects of the Invention] As described above, according to the present invention, the power supply of the circuit for controlling the operation time of the contact that short-circuits the resistor for limiting the inrush current is supplied through the auxiliary contact of the circuit breaker. Even if the circuit breaker is turned off and then turned on again by discharging the electric charge of the relay operation time control capacitor during operation of the relay by another contact of the relay, the inrush current prevention circuit is always provided Has the effect that it can fulfill its function.
第１図は本考案の一実施例に係る突入電流防止回路の構
成図、第２図は従来の突入電流防止回路の構成図であ
る。 1:サーキットブレーカ 2:トランジスタ 3:定電圧ダイオード Ein：入力電源 RL1:継電器 C1,C2:コンデンサ R1,R2,R3,R4:抵抗FIG. 1 is a configuration diagram of an inrush current prevention circuit according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of a conventional inrush current prevention circuit. 1: Circuit breaker 2: Transistor 3: Constant voltage diode E in : Input power supply RL1: Relay C1, C2: Capacitor R1, R2, R3, R4: Resistor
Claims (1)
１の抵抗を介してコンデンサに印加される電源入力回路
の突入電流防止回路において、該サーキットブレーカの
補助接点の一端が該抵抗の結合点に接続され、他端が継
電器、トランジスタの直列回路および２つの抵抗の直列
回路を介して上記入力電源の他の一端に接続され、該２
つの抵抗の結合点が定電圧ダイオードを介して該トラン
ジスタのベース端子に接続され、また、該継電器の一方
の接点であるメイク接点が第１の抵抗の両端に接続さ
れ、他の接点であるブレーク接点とコンデンサの直列回
路が上記２つの抵抗のうち一方の抵抗の両端に接続さ
れ、かつ他方の接点であるメイク接点が抵抗を介して上
記コンデンサと直列回路を成すように構成されたことを
特徴とする突入電流防止回路。1. In an inrush current prevention circuit of a power supply input circuit, wherein one end of an input power source is applied to a capacitor via a circuit breaker and a first resistor, one end of an auxiliary contact of the circuit breaker serves as a connection point of the resistor. The other end is connected to the other end of the input power source through a relay, a series circuit of transistors, and a series circuit of two resistors.
The connecting point of one resistor is connected to the base terminal of the transistor through a constant voltage diode, and the make contact that is one contact of the relay is connected to both ends of the first resistor and the break contact that is the other contact. A series circuit of a contact and a capacitor is connected to both ends of one of the two resistors, and a make contact, which is the other contact, is configured to form a series circuit with the capacitor through the resistor. Inrush current prevention circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986190287U JPH0735236Y2 (en) | 1986-12-10 | 1986-12-10 | Inrush current prevention circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986190287U JPH0735236Y2 (en) | 1986-12-10 | 1986-12-10 | Inrush current prevention circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6395124U JPS6395124U (en) | 1988-06-20 |
| JPH0735236Y2 true JPH0735236Y2 (en) | 1995-08-09 |
Family
ID=31143368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986190287U Expired - Lifetime JPH0735236Y2 (en) | 1986-12-10 | 1986-12-10 | Inrush current prevention circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0735236Y2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53143551U (en) * | 1977-04-18 | 1978-11-13 | ||
| JPS5552719U (en) * | 1978-10-04 | 1980-04-08 | ||
| JPS59191433A (en) * | 1983-04-13 | 1984-10-30 | 日本電気株式会社 | Rush current suppressing circuit |
-
1986
- 1986-12-10 JP JP1986190287U patent/JPH0735236Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6395124U (en) | 1988-06-20 |
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