JPS6240839B2 - - Google Patents
Info
- Publication number
- JPS6240839B2 JPS6240839B2 JP58166786A JP16678683A JPS6240839B2 JP S6240839 B2 JPS6240839 B2 JP S6240839B2 JP 58166786 A JP58166786 A JP 58166786A JP 16678683 A JP16678683 A JP 16678683A JP S6240839 B2 JPS6240839 B2 JP S6240839B2
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent lamp
- capacitor
- fluorescent
- switch circuit
- parallel
- 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
Links
- 239000003990 capacitor Substances 0.000 claims description 37
- 230000001939 inductive effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はけい光灯点灯装置、特に定格ランプ電
圧とほぼ等しいかやや低い電源電圧でけい光灯ま
たは直列接続したけい光灯群を直接点灯させる装
置に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a fluorescent lamp lighting device, particularly for directly lighting a fluorescent lamp or a group of fluorescent lamps connected in series using a power supply voltage that is approximately equal to or slightly lower than the rated lamp voltage. Regarding equipment.
近年、低電圧電源でけい光灯を直線点灯させる
ため、電源電圧の各半サイクル中所定の期間けい
光灯を短絡し、その後開放する動作を行なうスイ
ツチ回路を用い、上記スイツチ回路の短絡時に流
れる電流によつて安定器のインダクタンスに電磁
エネルギーを蓄積し、上記スイツチ回路の開放時
にこの電磁エネルギーを電源からの入力に重畳し
てけい光灯に印加する方式が開発されている。
In recent years, in order to light a fluorescent lamp in a straight line using a low-voltage power supply, a switch circuit is used that short-circuits the fluorescent lamp for a predetermined period during each half cycle of the power supply voltage, and then opens it. A system has been developed in which electromagnetic energy is stored in the inductance of the ballast by means of an electric current, and when the switch circuit is opened, this electromagnetic energy is superimposed on the input from the power source and applied to the fluorescent lamp.
この種点灯装置は、低電圧電源（たとえば
100V商用電源）により従来点灯不可能であつた
けい光灯（たとえば定格ランプ電圧105Vの40W
けい光灯）を直接点灯させることができ、安定器
などの点灯回路部品を小形化できる利点を有して
いる。 This type of lighting device is powered by a low voltage power supply (e.g.
A 40W fluorescent lamp (for example, a rated lamp voltage of 105V) that could not be lit conventionally using a 100V commercial power supply
It has the advantage of being able to directly light a fluorescent lamp (fluorescent lamp) and downsizing lighting circuit components such as a ballast.
しかし、従来提案されているこの種点灯装置の
構成では、スイツチ回路のしや断電流値、すなわ
ちスイツチオフの時点でスイツチ回路に流れてい
た電流値の大小により安定器に蓄積される電磁エ
ネルギーの大きさ、したがつて点灯時けい光灯で
消費される放電電力の大きさが決定されるため、
放電電力を十分大きくしようとすると、スイツチ
回路のしや断電流値を大きくとる必要があり、サ
イリスタなどのスイツチ要素の性能上の制約から
スイツチ回路の設計が困難であつた。 However, in the configuration of this type of lighting device that has been proposed in the past, the amount of electromagnetic energy accumulated in the ballast depends on the current value of the switch circuit, that is, the value of the current flowing through the switch circuit at the time of switch-off. Therefore, since the amount of discharge power consumed by the fluorescent lamp when lit is determined,
In order to increase the discharge power sufficiently, it is necessary to increase the break current value of the switch circuit, and it has been difficult to design the switch circuit due to performance constraints of switch elements such as thyristors.
本発明の目的は、スイツチ回路の設計が容易
で、けい光灯の放電電力を十分大きくとることが
できるこの種のけい光灯点灯装置を提供すること
にある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a fluorescent lamp lighting device of this type in which the design of the switch circuit is easy and the discharge power of the fluorescent lamp can be sufficiently large.
本発明は、交流電源と誘導性安定器とけい光灯
または直列接続したけい光灯群とを含む主回路
と、上記けい光灯またはけい光灯群に並列接続し
たスイツチ回路を備え、上記スイツチ回路が電流
電圧の各半サイクル中所定の期間導通し、その後
開放する動作を行なうように構成されているけい
光灯点灯装置において、上記けい光灯または上記
けい光灯群のうちの少なくとも１個のけい光灯に
並列にコンデンサを接続し、上記コンデンサの容
量を、再点弧直後のけい光灯の放電電圧が上記コ
ンデンサの放電によりそれに続く定常状態の放電
電圧に比べて十分小さくなるように定めたことを
特徴としている。本発明者らの研究によれば、こ
のように構成することにより、上記けい光灯また
はけい光灯群の放電電力が増大し、放電電力が同
一ならばスイツチ回路のしや断電流値をより小さ
くできることが判明した。
The present invention comprises a main circuit including an AC power supply, an inductive ballast, a fluorescent lamp or a group of fluorescent lamps connected in series, and a switch circuit connected in parallel to the fluorescent lamp or group of fluorescent lamps, in a fluorescent lamp lighting device configured to conduct for a predetermined period of time during each half-cycle of current and voltage, and then to open. A capacitor is connected in parallel to the fluorescent lamp, and the capacitance of the capacitor is determined so that the discharge voltage of the fluorescent lamp immediately after re-ignition is sufficiently smaller than the steady state discharge voltage that follows due to the discharge of the capacitor. It is characterized by According to the research conducted by the present inventors, with this configuration, the discharge power of the above-mentioned fluorescent lamp or group of fluorescent lamps can be increased, and if the discharge power is the same, the short circuit current value of the switch circuit can be lowered. It turns out that it can be made smaller.
以下、本発明の実施例を図面を用いて説明す
る。第１図は本発明の実施例の回路構成図で、ａ
は１灯用回路、ｂは２灯直列点灯回路の例を示
す。図中、１は交流電源、２は誘導性安定器、
３，３′はけい光灯、４はスイツチ回路であり、
本発明によれば、ａ図ではけい光灯３に並列にコ
ンデンサ５が接続され、ｂ図では直列接続したけ
い光灯群３，３′のうちの１個のけい光灯３に並
列にコンデンサ５′が接続される。上記コンデン
サ５は雑音防止用コンデンサを兼ね、上記コンデ
ンサ５′は直列接続したけい光灯群の起動補助コ
ンデンサを兼ねている。ｂ図の放電灯群３，３′
に並列に接続したコンデンサ６は雑音防止用で、
その有無は本発明の効果には影響がない。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit configuration diagram of an embodiment of the present invention.
1 shows an example of a one-lamp circuit, and b shows an example of a two-lamp series lighting circuit. In the figure, 1 is an AC power supply, 2 is an inductive ballast,
3 and 3' are fluorescent lamps, 4 is a switch circuit,
According to the present invention, a capacitor 5 is connected in parallel to the fluorescent lamp 3 in Fig. a, and a capacitor 5 is connected in parallel to one fluorescent lamp 3 of the fluorescent lamp group 3, 3' connected in series in Fig. b. 5' is connected. The capacitor 5 also serves as a noise prevention capacitor, and the capacitor 5' also serves as an auxiliary capacitor for starting a group of fluorescent lamps connected in series. Discharge lamp group 3, 3' in figure b
The capacitor 6 connected in parallel with is for noise prevention.
Its presence or absence has no effect on the effects of the present invention.
スイツチ回路４の構成例を第２図に示す。本回
路では、スイツチ要素としてゲートターンオフ特
性を有するサイリスタ７が用いられており、交流
用スイツチとするため、全波整流器８を介して端
子Ａ・Ｂ間に接続されている。サイリスタ７のカ
ソード端には抵抗９、ダイオード１０、コンデン
サ１１の直並列回路が接続され、ゲート端には通
常のサイリスタ１２が接続される。抵抗１３，１
４，１５はサイリスタ１２のゲートトリガが回路
を構成し、抵抗１６はサイリスタ７のゲートトリ
ガ回路を構成している。 An example of the configuration of the switch circuit 4 is shown in FIG. In this circuit, a thyristor 7 having gate turn-off characteristics is used as a switch element, and is connected between terminals A and B via a full-wave rectifier 8 in order to function as an AC switch. A series-parallel circuit of a resistor 9, a diode 10, and a capacitor 11 is connected to the cathode end of the thyristor 7, and a normal thyristor 12 is connected to the gate end. Resistance 13,1
4 and 15, the gate trigger of the thyristor 12 constitutes a circuit, and the resistor 16 constitutes a gate trigger circuit of the thyristor 7.
いま、サイリスタ７が非導通でサイリスタ１２
が導通していれば、抵抗１６に電流が流れてもサ
イリスタ７はターンオンしない。サイリスタ１２
の導通は抵抗１６の電流で保持される。けい光灯
３，３′のランプ電流がゼロになつてＡ・Ｂ間の
電圧がなくなると、抵抗１６の電流はゼロとな
り、サイリスタ１２がターンオフする。次に電圧
がＡ・Ｂ間に加わると、サイリスタ７のゲート・
カソード間は開放になつているので、ただちにサ
イリスタ７がターンオンする。これによつてＡ・
Ｂ間電圧は十分小さくなるため、サイリスタ１２
はターンオンしない。サイリスタ７の導通により
電流がＡ・Ｂ間に流れ、抵抗９の両端間に生じる
電圧が一定の大きさになると、抵抗１４に流れる
電流によりサイリスタ１２がターンオンする。コ
ンデンサ１１の電荷は急には放電しないため、サ
イリスタ７のカソード電位はゲート電位より高く
なり、サイリスタ７はそのゲートターンオフ特性
により急速にターンオフし、Ａ・Ｂ間電流を実質
的にしや断する。その際、安定器２に生じるパル
ス電圧により、第１図ａではけい光灯３がただち
に点灯し、同図ｂではけい光灯３′がまず点灯
し、次にけい光灯３が点灯する。 Now, thyristor 7 is non-conducting and thyristor 12
If the resistor 16 is conductive, the thyristor 7 will not be turned on even if current flows through the resistor 16. Thyristor 12
The conduction is maintained by the current flowing through the resistor 16. When the lamp current of the fluorescent lamps 3, 3' becomes zero and the voltage between A and B disappears, the current of the resistor 16 becomes zero and the thyristor 12 is turned off. Next, when voltage is applied between A and B, the gate of thyristor 7
Since the gap between the cathodes is open, the thyristor 7 is immediately turned on. By this A.
Since the voltage between B becomes sufficiently small, thyristor 12
does not turn on. When the thyristor 7 becomes conductive, a current flows between A and B, and when the voltage generated across the resistor 9 reaches a certain level, the thyristor 12 is turned on by the current flowing through the resistor 14. Since the charge in the capacitor 11 is not suddenly discharged, the cathode potential of the thyristor 7 becomes higher than the gate potential, and the thyristor 7 is quickly turned off due to its gate turn-off characteristic, substantially cutting off the current between A and B. In this case, the pulse voltage generated in the ballast 2 immediately lights up the fluorescent lamp 3 in FIG. 1a, and in FIG.
以上の動作が繰返され、スイツチ回路４は、常
にランプ電圧がゼロになつてからスイツチオン
し、スイツチ通電電流が一定値に達したときにス
イツチオフする動作を行なうので、けい光灯３，
３′は各半サイクルの残りの期間点灯し、それま
でに安定器に蓄積された電磁エネルギーは放電電
力として効率よく利用される。 The above operation is repeated, and the switch circuit 4 always switches on after the lamp voltage becomes zero, and switches off when the switch current reaches a certain value, so that the fluorescent lamp 3,
3' is lit for the remainder of each half cycle, and the electromagnetic energy previously stored in the ballast is efficiently utilized as discharge power.
第３図は、第１図に示す点灯回路においてコン
デンサ５，５′の容量を変化させたときのけい光
灯放電電力の変化の実測例を示す図で、ａは電源
電圧をAC100V、安定器インダクタンスを
0.38H、スイツチ回路のしや断電流値を400ｍＡ
に設定し、40Wけい光灯（FL−40）を単独で点
灯させた場合、ｂは電源電圧をAC200V、安定器
インダクタンスを0.63H、スイツチ回路のしや断
電流値を400ｍＡに設定し、40Wけい光ランプ
（FLR−40）を２灯直列点灯させた場合（雑音防
止用コンデンサ６は0.01μＦ）である。いずれの
場合もコンデンサ５，５′の容量が増加するにつ
れて放電電力が増加し、ａの例ではコンデンサ容
量0.022μＦ以上、ｂの例ではコンデンサ容量
0.047μＦ以上で放電電力は一定値に近づく。 Figure 3 is a diagram showing an actual measurement example of the change in fluorescent lamp discharge power when the capacitance of capacitors 5 and 5' is changed in the lighting circuit shown in Figure 1. inductance
0.38H, switch circuit break current value 400mA
When set to , and a 40W fluorescent lamp (FL-40) is turned on alone, b is the power supply voltage of 200V AC, the ballast inductance of 0.63H, and the cut-off current value of the switch circuit is set to 400mA, and the output of 40W is 40W. This is the case when two fluorescent lamps (FLR-40) are lit in series (noise prevention capacitor 6 is 0.01 μF). In either case, the discharge power increases as the capacitance of capacitors 5 and 5'increases; in example a, the capacitor capacity is 0.022 μF or more, and in example b, the capacitor capacity is
At 0.047 μF or more, the discharge power approaches a constant value.
このように他の回路条件が一定であるにもかか
わらず、コンデンサ５，５′の容量によつて放電
電力が変化するのはけい光灯の特性による。すな
わち、パルス電圧印加によりけい光灯３，３′が
点灯すると、コンデンサ５，５′の充電電荷が並
列接続されたけい光灯３を通して急激に放電す
る。このコンデンサ５，５′による放電電流が十
分大であるとき、けい光灯３内に高密度プラズマ
が形成され、コンデンサ５，５′の放電電流が零
になつても高密度プラズマはすぐには消失しない
ため、けい光灯３の放電電圧（ランプ電圧）は再
点弧直後しばらくの間著しく低い値となり、やが
てけい光灯３内の過剰プラズマが再結合により消
失すると、けい光灯３の放電電圧が上がり、定常
状態となる。このように毎半サイクルの再点弧直
後、スイツチ回路４はすでに開放状態にあるにも
かかわらず、けい光灯３，３′が短絡に近い状態
となるため、実質的にスイツチ回路４の導通期間
が延びたのと同様になり、コンデンサ容量が大き
いほど放電電力に寄与する安定器２の蓄積エネル
ギーが増加するものと考えられる。 The reason why the discharge power varies depending on the capacitance of the capacitors 5 and 5' even though other circuit conditions are constant is due to the characteristics of the fluorescent lamp. That is, when the fluorescent lamps 3, 3' are turned on by applying a pulse voltage, the charges in the capacitors 5, 5' are rapidly discharged through the fluorescent lamps 3 connected in parallel. When the discharge current from the capacitors 5 and 5' is sufficiently large, high-density plasma is formed within the fluorescent lamp 3, and even if the discharge current from the capacitors 5 and 5' becomes zero, the high-density plasma will not be generated immediately. As the lamp does not disappear, the discharge voltage (lamp voltage) of the fluorescent lamp 3 becomes extremely low for a while immediately after being re-ignited, and when the excess plasma inside the fluorescent lamp 3 disappears due to recombination, the discharge of the fluorescent lamp 3 decreases. The voltage increases and becomes steady state. In this way, immediately after every half cycle, even though the switch circuit 4 is already in the open state, the fluorescent lamps 3 and 3' are almost in a short-circuited state, so that the switch circuit 4 is virtually disconnected. This is similar to when the period is extended, and it is thought that the larger the capacitor capacity, the more the stored energy of the ballast 2 that contributes to the discharge power increases.
ランプ電圧の低下の度合およびその期間はコン
デンサ５，５′の容量にある程度まで依存する
が、それ以上容量がふえても放電電力は増加せ
ず、けい光灯自体のイオン拡散時間できまる一定
値となる。 The degree and duration of the lamp voltage drop depend to some extent on the capacitance of the capacitors 5 and 5', but even if the capacitance increases beyond that, the discharge power will not increase, and will remain at a constant value determined by the ion diffusion time of the fluorescent lamp itself. becomes.
ここで、同一コンデンサ容量に対する放電電力
の値は、スイツチ回路４のしや断電流値の大小に
よつて増減する。しかし、その増減の割合はコン
デンサ容量が大きいほど小さく、放電電力が一定
となるときのコンデンサ容量はほとんど変わらな
い。また、けい光灯の大きさ（定格消費電力）が
異なる場合でも、ほぼ同様の傾向が見られる。し
たがつて、けい光灯に並列接続するコンデンサの
容量は、１灯用回路では0.022μＦ以上、２灯直
列点灯回路では0.047μＦ以上であればよい。 Here, the value of discharge power for the same capacitor capacity increases or decreases depending on the magnitude of the cut-off current value of the switch circuit 4. However, the rate of increase and decrease is smaller as the capacitor capacity increases, and when the discharge power is constant, the capacitor capacity hardly changes. Moreover, almost the same tendency can be seen even when the size (rated power consumption) of the fluorescent lamps is different. Therefore, the capacitance of a capacitor connected in parallel to a fluorescent lamp may be 0.022 μF or more in a circuit for one lamp, and 0.047 μF or more in a circuit for lighting two lamps in series.
以上説明したように本発明は、この種点灯装置
において、けい光灯または直列接続したけい光灯
群のうち少なくとも１個のけい光灯に並列にコン
デンサを接続し、上記コンデンサの容量を前記し
た特定の値に定めることにより、他の回路条件が
一定でも放電電力を十分大きくとれるようにした
ものである。したがつて、放電電力が同一であれ
ば、スイツチ回路のしや断電流値をより小さくす
ることができ、スイツチ回路の設計が容易になる
という利点がある。
As explained above, the present invention provides a lighting device of this type in which a capacitor is connected in parallel to at least one fluorescent lamp out of a fluorescent lamp or a group of fluorescent lamps connected in series, and the capacitance of the capacitor is set to the above-mentioned value. By setting it to a specific value, it is possible to obtain a sufficiently large discharge power even if other circuit conditions are constant. Therefore, if the discharge power is the same, the short circuit current value of the switch circuit can be made smaller, and there is an advantage that the design of the switch circuit becomes easier.
また、コンデンサ容量を放電電力がほぼ一定と
なるように設定しているので、実用上容量値が多
少ばらついても放電電力の変動を十分小さく押え
ることができる。 Furthermore, since the capacitor capacity is set so that the discharge power is approximately constant, even if the capacitance value varies somewhat in practice, fluctuations in the discharge power can be kept sufficiently small.
第１図は本発明によるけい光灯点灯装置の実施
例図、第２図はその要部回路図、第３図はけい光
灯に並列接続したコンデンサ容量とけい光灯放電
電力の関係を示す実測図である。
１……交流電源、２……誘導性安定器、３，
３′……けい光灯、４……スイツチ回路、５，
５′……けい光灯に並列接続したコンデンサ。
Fig. 1 is an embodiment of the fluorescent lamp lighting device according to the present invention, Fig. 2 is its main circuit diagram, and Fig. 3 is an actual measurement showing the relationship between the capacitance of a capacitor connected in parallel to the fluorescent lamp and the fluorescent lamp discharge power. It is a diagram. 1... AC power supply, 2... Inductive ballast, 3,
3'...Fluorescent lamp, 4...Switch circuit, 5,
5'...Capacitor connected in parallel to the fluorescent lamp.
Claims (1)
列接続したけい光灯群とを含む主回路と、上記け
い光灯またはけい光灯群に並列に接続したスイツ
チ回路を備え、上記スイツチ回路が電源電圧の各
半サイクル中所定の期間導通し、その後開放する
動作を行なうように構成されているけい光灯点灯
装置において、上記けい光灯または上記けい光灯
群のうちの少なくとも１個のけい光灯に並列にコ
ンデンサを接続し、上記コンデンサの容量を、再
点弧直後のけい光灯の放電電圧が上記コンデンサ
の放電によりそれに続く定常状態の放電電圧に比
べて十分小さくなるように定めたことを特徴とす
るけい光灯点灯装置。 ２ 上記主回路中に接続したけい光灯が１個であ
り、このけい光灯に並列接続したコンデンサの容
量が0.022μＦ以上であることを特徴とする特許
請求の範囲１記載のけい光灯点灯装置。 ３ 上記けい光灯群が２灯からなり、このうちの
少なくとも１個のけい光灯に並列接続したコンデ
ンサの容量が0.047μＦ以上であることを特徴と
する特許請求の範囲１記載のけい光灯点灯装置。[Scope of Claims] 1. A main circuit including an AC power source, an inductive ballast, a fluorescent lamp or a group of fluorescent lamps connected in series, and a switch circuit connected in parallel to the fluorescent lamp or group of fluorescent lamps connected in series. , in a fluorescent lamp lighting device, wherein the switch circuit is configured to conduct for a predetermined period during each half cycle of the power supply voltage, and then to open the switch circuit, A capacitor is connected in parallel to at least one fluorescent lamp, and the capacitance of the capacitor is such that the discharge voltage of the fluorescent lamp immediately after re-ignition is sufficiently small compared to the steady-state discharge voltage that follows due to discharge of the capacitor. A fluorescent lamp lighting device characterized by: 2. Fluorescent lamp lighting according to claim 1, characterized in that only one fluorescent lamp is connected to the main circuit, and the capacitance of a capacitor connected in parallel to this fluorescent lamp is 0.022 μF or more. Device. 3. The fluorescent lamp according to claim 1, wherein the fluorescent lamp group consists of two lamps, and a capacitor connected in parallel to at least one of the fluorescent lamps has a capacitance of 0.047 μF or more. lighting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16678683A JPS5973892A (en) | 1983-09-12 | 1983-09-12 | Device for firing fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16678683A JPS5973892A (en) | 1983-09-12 | 1983-09-12 | Device for firing fluorescent lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5973892A JPS5973892A (en) | 1984-04-26 |
| JPS6240839B2 true JPS6240839B2 (en) | 1987-08-31 |
Family
ID=15837643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16678683A Granted JPS5973892A (en) | 1983-09-12 | 1983-09-12 | Device for firing fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5973892A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50130273A (en) * | 1974-03-30 | 1975-10-15 |
-
1983
- 1983-09-12 JP JP16678683A patent/JPS5973892A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50130273A (en) * | 1974-03-30 | 1975-10-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5973892A (en) | 1984-04-26 |
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