JP2777886B2 - Incandescent lighting circuit - Google Patents
Incandescent lighting circuitInfo
- Publication number
- JP2777886B2 JP2777886B2 JP62026429A JP2642987A JP2777886B2 JP 2777886 B2 JP2777886 B2 JP 2777886B2 JP 62026429 A JP62026429 A JP 62026429A JP 2642987 A JP2642987 A JP 2642987A JP 2777886 B2 JP2777886 B2 JP 2777886B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- incandescent lamp
- rectifier
- series
- power
- 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 - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は、電源投入時の突入電流を制限する白熱電
球点燈回路に関するものであり、詳細には、白熱電球と
交流電源との間に直列に介挿されるスイッチ回路を含ん
でなり、白熱電球に交流を印加して点燈する際、電源投
入時に白熱電球を含む電路に流入することがある突入電
流を著減する白熱電球点燈回路に関するものである。
〈従来の技術〉
白熱電球におけるフィラメントの抵抗は、点燈時と非
点燈時とでは大幅に相違する。定格電圧100ボルト、定
格電力100ワットの白熱電球を例にとると、点燈時のフ
ィラメント抵抗が略100オームであるのに対して、非点
燈時、すなわち、常温下におけるフィラメント抵抗は、
その数分の一の10オーム前後と言われている。
電灯線などの交流電源を使用して白熱電球を交流点燈
する場合には、通常、室温下の白熱電球にいきなり交流
電源を接続する点燈方法が採用される。前述のとおり、
白熱電球のフィラメント抵抗が点燈時と非点燈時とでは
大幅に違うことから、斯かる点燈方法に依るときには、
電源投入時に白熱電球にその定格の数倍にも達する突入
電流が流入することとなり、白熱電球の寿命を著しく短
縮する。
斯かる突入電流の存在は斯界においてよく認識されて
おり、これまで、電源投入時の投入電流を制限すること
により、白熱電球の寿命短縮を防止するための多種多様
の回路・装置が提案されてきた。しかしながら、従来の
回路・装置は、いずれも、部品点数が多くなる傾向があ
り、しかも、その多くは二線式であった。このことか
ら、従来の回路・装置を使用すると、回路・装置やその
取付けに要するコストが、断線した白熱電球を交換する
コストを大幅に上回ることとなり、そのほとんどが未だ
実用化されていないというのが実状である。
〈発明により解決すべき課題〉
斯かる状況に鑑み、この発明は、電源投入時の突入電
流を効果的に制限でき、しかも、比較的少ない部品点数
で構成でき且つ白熱電球と交流電源の間に直列に介挿し
て使用し得る白熱電球点燈回路を提供することにある。
〈課題を解決するための手段〉
すなわち、この発明は、白熱電球に交流を印加して点
燈する回路において、白熱電球と交流電源の間に、双方
向導通制御整流素子と、その双方向導通制御整流素子の
主電路に並列接続された直列抵抗と、前記双方向導通制
御整流素子における主電路の一側に接続され、２個以上
のダイオードを直列接続したダイオードの直列接続体２
つを逆並列に接続したダイオード回路と、そのダイオー
ド回路の両端に接続された整流回路と、その整流回路の
出力端に接続されたRC時定数回路と、そのRC時定数回路
の出力端に接続された制御極と前記双方向導通制御整流
素子の制御極に接続された主電路を有する逆阻止三端子
サイリスタとからなるスイッチ回路を直列に介挿するこ
とにより、交流電源から白熱電球にその定格電圧が印加
されるのを電源投入から一定時間遅延させることを特徴
とする白熱電球点燈回路を要旨とするものである。
〈実施例〉
以下、図示実施例に沿ってこの発明を説明するに、第
１図はこの発明による白熱電球点燈回路の一例を示し、
図中、Ｌは白熱電球であり、この発明によるスイッチ回
路と電源スイッチＳを介して電灯線などの交流電源ACに
接続されている。
そのスイッチ回路とは、第１図に示すように、双方向
導通制御整流素子BCRと、その双方向導通制御整流素子B
CRの主電路と並列接続された直列抵抗R1と、双方向導通
制御整流素子BCRにおける主電路の一側に接続され、２
個以上のダイオードを直列接続したダイオードの直列接
続体２つを逆並列に接続したダイオード回路Dnと、ダイ
オード回路Dnの両端に接続され、ダイオードD2とコンデ
ンサC1からなる整流回路と、その整流回路の出力端に接
続され、抵抗R2とコンデンサC2からなるRC時定数回路
と、そのRC時定数回路の出力端に接続された制御極と双
方向導通制御整流素子BCRの制御極Ｇに接続された主電
路を有する逆阻止三端サイリスタSCRとにより構成され
る。
本例の動作について説明するに、まず、電源スイッチ
Ｓを閉路すると、この時点で、双方向導通制御整流素子
BCRは導通していないので、白熱電球Ｌには、交流電源A
Cの電圧が直列抵抗R1により分圧されて供給される。
一方、電源投入と同時に、白熱電球Ｌを含む電路に介
挿されたガイオード回路Dnの両端には、白熱電球Ｌに流
れる電流の多寡に依存しない電圧降下が発生する。ダイ
オードにも依るが、この電圧降下は、通常、２個のダイ
オードを逆並列に接続した場合の電圧降下は約0.7ボル
ト程度であるから、第１図の例では、ダイオード回路Dn
の両端には、少なくとも３ボルト近くの電圧降下が発生
することとなる。この電圧は、前記整流回路により直流
化され、RC時定数回路におけるコンデンサC2を充電する
のに利用される。第２図は、コンデンサC2両端における
電圧の経時変化とともに、本例においては、電源投入か
ら約0.15秒後に逆阻止三端子サイリスタSCRが導通する
ことを示す。
逆阻止三端子サイリスタSCRが導通すると、その導通
電流により、双方向導通制御整流素子BCRの制御極Ｇに
は負のトリガ電圧が印加され、主電路が導通して直列抵
抗R1を短絡する。第３図は直列抵抗R1両端における電圧
の経時変化であり、逆阻止三端子サイリスタSCRが導通
すると、直列抵抗R1が短絡される様子を示している。白
熱電球Ｌには、この時点で初めて交流電源ACの電圧から
ダイオード回路両端の降下電圧を減じた電圧、すなわ
ち、実質的な定格電圧が印加されることになる。しかし
ながら、白熱電球Ｌのフィラメントは、この0.15秒間に
充分予熱されており、実質的な定格電圧が印加されて
も、白熱電球Ｌを含む電路には、もはや、突入電流の流
入することはない。このことは第４図からも明らかであ
り、白熱電球Ｌを流れる電流は電源投入以降ほぼ一定で
あり、本例の白熱電球点燈回路が、電源投入時の突入電
流を効果的に制限したことを示している。
本例はこのように構成されているので、RC時定数回路
の時定数と、直列抵抗R1の抵抗値を適切に設定すること
により、電源投入に伴う突入電流を実質皆無とするのが
容易である。しかも、本例は、その主要部たるスイッチ
回路を白熱電球と交流電源の間に直列に介挿できるの
で、既設の点燈回路に対しても多大のコストを伴うこと
なく、有利に適用できる利点がある。
〈発明の効果〉
叙上のように、この発明による白熱電球点燈回路によ
るときには、電源投入から一定時間、白熱電球にその定
格電圧を印加するのを遅延できるので、電源投入時の突
入電流に基づく白熱電球の寿命短縮を効果的に防止でき
る。
しかも、この発明による白熱電球点燈回路は比較的少
ない部品点数で構成でき、しかも、その主要部たるスイ
ッチ回路を交流電源と白熱電球の間に直列に介挿できる
利点がある。
これらのことから、この発明の白熱電球点燈回路は、
白熱電球を光源とする照明器具一般に有利に適用でき、
電源投入時の突入電流に基づく白熱電球の寿命短縮を効
果的に防止できることとなる。DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to an incandescent lamp lighting circuit for limiting an inrush current at the time of turning on a power supply, and more particularly, to a circuit between an incandescent lamp and an AC power supply. Includes a switch circuit that is inserted in series and, when applying AC to the incandescent lamp and lighting it, incandescent lamp lighting circuit that significantly reduces inrush current that may flow into the electric circuit including the incandescent lamp when the power is turned on It is about. <Related Art> The resistance of a filament in an incandescent light bulb differs greatly between lighting and non-lighting. Taking an incandescent lamp with a rated voltage of 100 volts and a rated power of 100 watts as an example, the filament resistance at the time of lighting is approximately 100 ohms, while the filament resistance at the time of non-lighting, that is, at room temperature, is
It is said to be a fraction of that, around 10 ohms. When an incandescent lamp is to be turned on using an AC power source such as a power line, a lighting method in which an AC power source is immediately connected to the incandescent lamp at room temperature is usually used. As mentioned above,
Since the filament resistance of an incandescent light bulb is significantly different between when it is lit and when it is not lit, when using such a lighting method,
When the power is turned on, an inrush current that reaches several times its rating flows into the incandescent lamp, and the life of the incandescent lamp is significantly shortened. The existence of such an inrush current is well recognized in the art, and a variety of circuits and devices have been proposed to prevent the shortening of the life of an incandescent lamp by limiting the power-on current at power-on. Was. However, conventional circuits and devices all tend to have a large number of components, and most of them are two-wire systems. From this, when using conventional circuits and devices, the cost of installing the circuits and devices and their installation greatly exceeds the cost of replacing broken incandescent bulbs, and most of them have not yet been put to practical use. Is the actual situation. <Problems to be solved by the invention> In view of such a situation, the present invention can effectively limit the rush current at the time of turning on the power, can be configured with a relatively small number of parts, and can be configured between the incandescent lamp and the AC power supply. An object of the present invention is to provide an incandescent lamp lighting circuit that can be used by being inserted in series. <Means for Solving the Problems> That is, the present invention relates to a circuit for applying an alternating current to an incandescent lamp and lighting the circuit. A series resistor 2 connected in parallel to the main circuit of the control rectifier and a diode connected to one side of the main circuit in the bidirectional conduction control rectifier and having two or more diodes connected in series;
Rectifier circuit connected to both ends of the diode circuit, an RC time constant circuit connected to the output terminal of the rectifier circuit, and a diode circuit connected to the output terminal of the RC time constant circuit. A switch circuit consisting of a controlled pole and a reverse blocking three-terminal thyristor having a main circuit connected to the control pole of the bidirectional conduction control rectifier is connected in series, so that the rating of the incandescent lamp from the AC power supply is achieved. The gist of the invention is to provide an incandescent lamp lighting circuit characterized in that the application of a voltage is delayed for a certain period of time after the power is turned on. <Embodiment> Hereinafter, the present invention will be described with reference to the illustrated embodiment. FIG. 1 shows an example of an incandescent lamp lighting circuit according to the present invention.
In the figure, L denotes an incandescent lamp, which is connected to an AC power supply AC such as a power line via a switch circuit and a power switch S according to the present invention. As shown in FIG. 1, the switch circuit includes a bidirectional conduction control rectifier BCR and the bidirectional conduction control rectifier B
A series resistor R 1 connected in parallel with the main circuit of the CR, and one side of the main circuit of the bidirectional conduction control rectifier BCR,
A diode circuit Dn of the two series-connected bodies are connected in anti-parallel diode the number or more diodes connected in series, are connected to both ends of the diode circuit Dn, a rectifier circuit comprising a diode D 2 and the capacitor C 1, the rectifier is connected to the output terminal of the circuit, the RC time constant circuit comprising a resistor R 2 and capacitor C 2, to the control electrode G of the RC time constant circuit connected control electrode bidirectional conducting controlled rectifier BCR to the output end of the A reverse blocking three-terminal thyristor SCR having a connected main circuit. To describe the operation of the present example, first, when the power switch S is closed, at this point, the bidirectional conduction control rectifier
Since the BCR is not conducting, the AC light source A
Voltage C is supplied divided by the series resistance R 1. On the other hand, when the power is turned on, a voltage drop is generated at both ends of the guide circuit Dn inserted in the electric circuit including the incandescent lamp L, regardless of the amount of current flowing through the incandescent lamp L. Although this depends on the diode, this voltage drop is usually about 0.7 volt when two diodes are connected in anti-parallel. Therefore, in the example of FIG.
Will have a voltage drop of at least close to 3 volts. This voltage is a direct current by the rectifier circuit is used to charge the capacitor C 2 in the RC time constant circuit. Figure 2, as well as changes over time of the voltage across the capacitor C 2 ends, in this example, indicates that the reverse-blocking three-terminal thyristor SCR conducts from power after about 0.15 seconds. When reverse-blocking three-terminal thyristor SCR conducts, by its conduction current, the control electrode G of the bidirectional conducting controlled rectifier BCR is applied a negative trigger voltage, to short-circuit the series resistor R 1 and the main path becomes conductive. Figure 3 is a time course of the voltage at the series resistor R 1 at both ends, when the reverse-blocking three-terminal thyristor SCR conducts, shows how the series resistance R 1 is short-circuited. At this point, a voltage obtained by subtracting the voltage drop across the diode circuit from the voltage of the AC power supply AC, that is, a substantial rated voltage is applied to the incandescent lamp L for the first time. However, the filament of the incandescent lamp L is sufficiently preheated for 0.15 seconds, so that even when the substantial rated voltage is applied, the inrush current no longer flows into the electric circuit including the incandescent lamp L. This is clear from FIG. 4, in which the current flowing through the incandescent lamp L is almost constant after the power is turned on, and the incandescent lamp lighting circuit of this example effectively limits the inrush current at the time of turning on the power. Is shown. Since this embodiment is constructed as this, the time constant of the RC time constant circuit, by appropriately setting the resistance value of the series resistor R 1, easy to virtually nil rush current due to power-on It is. Moreover, in this example, since the main switch circuit can be inserted in series between the incandescent lamp and the AC power supply, it can be advantageously applied to existing lighting circuits without great cost. There is. <Effect of the Invention> As described above, in the incandescent lamp lighting circuit according to the present invention, the application of the rated voltage to the incandescent lamp can be delayed for a certain period of time after the power is turned on. This can effectively prevent the life of the incandescent light bulb from being shortened. In addition, the incandescent lamp lighting circuit according to the present invention has an advantage that it can be configured with a relatively small number of components, and that a main switch circuit can be inserted in series between the AC power supply and the incandescent lamp. From these, the incandescent lamp lighting circuit of the present invention is:
It can be advantageously applied to lighting fixtures using incandescent bulbs as light sources.
It is possible to effectively prevent the life of the incandescent lamp from being shortened based on the inrush current when the power is turned on.
【図面の簡単な説明】
第１図は、この発明による実施例の電気的構成部分を示
す回路図である。
第２乃至４図は、いずれも、第１図に示す実施例に見ら
れる電圧若しくは電圧の経時変化を示す図であり、第２
図はRC時定数回路におけるコンデンサC2両端の電圧を、
第３図は直列抵抗R1両端の電圧を、また、第４図は白熱
電球Ｌ両端の電圧を示す。
図中の符合について説明すれば、ACは交流電源を、Ｌは
白熱電球を、D2及びDnはダイオード若しくはダイオード
回路を、BCRは双方向導通制御整流素子を、SCRは逆阻止
三端子サイリスタを、R1及びR2は抵抗を、C1及びC2はコ
ンデンサを、Ｓは電源スイッチを示す。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing electrical components of an embodiment according to the present invention. 2 to 4 are diagrams showing the voltage or the change with time of the voltage seen in the embodiment shown in FIG.
Figure the voltage of the capacitor C 2 ends at the RC time constant circuit,
FIG. 3 shows the voltage across the series resistor R 1 , and FIG. 4 shows the voltage across the incandescent lamp L. Will describe signs in the figure, AC is an AC power source, L is an incandescent lamp, a D 2 and Dn are diodes or diode circuit, BCR is a bidirectional conducting controlled rectifier, SCR is reverse blocking three-terminal thyristor , R 1 and R 2 are resistors, C 1 and C 2 are capacitors, S is shown a power switch.
Claims (1)
白熱電球と交流電源の間に、双方向導通制御整流素子
と、その双方向導通制御整流素子の主電路に並列接続さ
れた直列抵抗と、前記双方向導通制御整流素子における
主電路の一側に接続され、２個以上のダイオードを直列
接続したダイオードの直列接続体２つを逆並列に接続し
たダイオード回路と、そのダイオード回路の両端に接続
された整流回路と、その整流回路の出力端に接続された
整流回路と、その整流回路の出力端に接続されたRC時定
数回路と、そのRC時定数回路の出力端に接続された制御
極と前記双方向導通制御整流素子の制御極に接続された
主電路を有する逆阻止三端子サイリスタとからなるスイ
ッチ回路を直列に介挿することにより、交流電源から白
熱電球にその定格電圧が印加されるのを電源投入から一
定時間遅延させることを特徴とする白熱電球点燈回路。(57) [Claims] In a circuit that lights an incandescent lamp by applying alternating current,
Between the incandescent lamp and the AC power supply, a bidirectional conduction control rectifier, a series resistor connected in parallel to the main circuit of the bidirectional conduction control rectifier, and one side of the main circuit in the bidirectional conduction control rectifier. A diode circuit in which two diodes are connected in series and two or more diodes are connected in series; a diode circuit in which two diodes are connected in anti-parallel; a rectifier circuit connected to both ends of the diode circuit; and an output terminal of the rectifier circuit Rectifier circuit, an RC time constant circuit connected to the output terminal of the rectifier circuit, a control electrode connected to the output terminal of the RC time constant circuit, and a control electrode of the bidirectional conduction control rectifier element. By inserting a switch circuit consisting of a reverse blocking three-terminal thyristor having a main circuit path in series, the application of the rated voltage from the AC power supply to the incandescent lamp is delayed for a certain time from the power-on. An incandescent lighting circuit.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62026429A JP2777886B2 (en) | 1987-02-09 | 1987-02-09 | Incandescent lighting circuit |
| US07/149,184 US4855649A (en) | 1987-02-09 | 1988-01-27 | Single-wired switching circuit directed to limit surge into lamp |
| EP88300754A EP0278639A1 (en) | 1987-02-09 | 1988-01-28 | Single-wired switching circuit directed to limit surge into lamp |
| BR8800440A BR8800440A (en) | 1987-02-09 | 1988-02-04 | MONOFILAR SWITCHING CIRCUIT TO LIMIT ELECTRIC LAMP OVERVOLTAGE |
| KR1019880001186A KR880010547A (en) | 1987-02-09 | 1988-02-09 | Bulb direct current surge prevention switch circuit for disconnection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62026429A JP2777886B2 (en) | 1987-02-09 | 1987-02-09 | Incandescent lighting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63194523A JPS63194523A (en) | 1988-08-11 |
| JP2777886B2 true JP2777886B2 (en) | 1998-07-23 |
Family
ID=12193268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62026429A Expired - Fee Related JP2777886B2 (en) | 1987-02-09 | 1987-02-09 | Incandescent lighting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2777886B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5959262B2 (en) * | 2012-03-27 | 2016-08-02 | 三菱電機株式会社 | Inrush current suppression circuit and light source lighting device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5568826A (en) * | 1978-11-15 | 1980-05-23 | Sharp Kk | Power supply circuit |
| JPS55103947U (en) * | 1979-01-11 | 1980-07-19 | ||
| JPS5717226U (en) * | 1980-06-25 | 1982-01-28 | ||
| JPS6146179A (en) * | 1984-08-09 | 1986-03-06 | Fujitsu Ltd | Power source circuit |
-
1987
- 1987-02-09 JP JP62026429A patent/JP2777886B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63194523A (en) | 1988-08-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |