JPH08115792A - Inverter circuit for illumination lamp - Google Patents
Inverter circuit for illumination lampInfo
- Publication number
- JPH08115792A JPH08115792A JP6277092A JP27709294A JPH08115792A JP H08115792 A JPH08115792 A JP H08115792A JP 6277092 A JP6277092 A JP 6277092A JP 27709294 A JP27709294 A JP 27709294A JP H08115792 A JPH08115792 A JP H08115792A
- Authority
- JP
- Japan
- Prior art keywords
- inductor
- series
- switching element
- smoothing capacitor
- capacitor
- 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.)
- Pending
Links
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- Inverter Devices (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する分野の説明】本発明の蛍光灯等へ給電す
る照明灯用インバ−タ回路に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminator lamp inverter circuit for supplying power to a fluorescent lamp or the like according to the present invention.
【０００２】[0002]
【従来技術】図４は従来の照明用インバ−タ回路の一例
を示す。１は交流電源、２は全波整流器、３、４、５、
６はそれぞれのダイオ−ド、７は平滑コンデンサ、８は
インダクタ、９はコンデンサ、１０はスイッチング素
子、１１は前記スイッチング素子の駆動回路、１２は蛍
光灯ランプ、１３は共振及び予熱通電用コンデンサ、１
４は電流制限用インダクタをしめす。この回路の動作
は、交流電源１を全波整流器２により整流しコンデンサ
７に充電する。スイッチング素子の駆動回路１１の信号
によりスイッチング素子１０はオン、オフする。スイッ
チング素子１０の初期オン時コンデンサ７からインダク
タ８には、電流が流れる。同時に蛍光灯ランプ１２のフ
ィラメントにコンデンサ１３、電流制限用インダクタ１
４を経由して予熱電流が流れる。又スイッチング素子１
０の初期オフ時は、インダクタ８に蓄積されたエネルギ
−はコンデンサ９と共振するとともに、前記同様電流制
限用インダクタ１４、コンデンサ１３を経由し蛍光灯ラ
ンプ１２のフィラメントに予熱電流が流れ蛍光灯ランプ
１２は要求点灯開始電圧が低下する。このスイッチング
素子１０のオン、オフを繰り返すことにより、蛍光灯ラ
ンプ１２は点灯し継続して発光する。 （３）2. Description of the Related Art FIG. 4 shows an example of a conventional lighting inverter circuit. 1 is an AC power supply, 2 is a full-wave rectifier, 3, 4, 5,
6 is each diode, 7 is a smoothing capacitor, 8 is an inductor, 9 is a capacitor, 10 is a switching element, 11 is a drive circuit for the switching element, 12 is a fluorescent lamp, 13 is a condenser for resonance and preheating, 1
Reference numeral 4 indicates a current limiting inductor. In the operation of this circuit, the AC power supply 1 is rectified by the full-wave rectifier 2 and the capacitor 7 is charged. The switching element 10 is turned on and off by a signal from the switching element drive circuit 11. A current flows from the capacitor 7 to the inductor 8 when the switching element 10 is initially turned on. At the same time, the filament of the fluorescent lamp 12 has a capacitor 13 and a current limiting inductor 1
A preheating current flows via 4. Switching element 1
When 0 is initially turned off, the energy stored in the inductor 8 resonates with the capacitor 9, and a preheating current flows through the filament of the fluorescent lamp 12 via the current limiting inductor 14 and the capacitor 13 as described above. In No. 12, the required lighting start voltage drops. By repeatedly turning on and off the switching element 10, the fluorescent lamp 12 is lit and continuously emits light. (3)
【０００３】[0003]
【従来技術の問題点】然し乍ら係る従来回路では入力電
流Ｉｉｎの波形かサ−ジ状のため力率が低くランプ１２
の点灯時に高周波電流が流れ、ノイズの発生により他の
機器等へ影響を及ぼす恐れがある。However, in such a conventional circuit, the power factor is low due to the waveform of the input current Iin or the shape of the surge, and the lamp 12 has a low power factor.
A high-frequency current may flow when the is lit, and noise may occur, which may affect other devices.
【０００４】[0004]
【発明の目的】本発明は照明灯の点灯時ノイズの発生を
防止して安定した点灯を維持し得る構成簡単なインバ−
タ回路の提供を目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an inverter having a simple structure capable of preventing noise during lighting of an illuminating lamp and maintaining stable lighting.
The purpose is to provide a digital circuit.
【０００５】[0005]
【課題を解決するための本発明の手段】本発明は本願出
願人が先に提案（特願平５−１７７３７９号）した電源
回路を基本として照明灯用インバ−タ回路を構成したも
ので、交流電源に接続された、全波整流器の出力端子間
に平滑コンデンサを接続し、該平滑コンデンサの端子間
にインダクタとコンデンサの並列回路をスイッチング素
子と直列接続し、前記インダクタと並列に蛍光灯ランプ
と電流制限用インダクタの直列回路を接続し、該スイッ
チング素子のオン、オフにより蛍光灯ランプを点灯させ
るようにしたインバ−タ回路において、該インダクタの
同一鉄心上に巻かれた制御巻線を設け、該整流器と該平
滑コンデンサの間に補助インダクタと該インダクタの制
御巻線を直列に接続した事を特徴とする。DISCLOSURE OF THE INVENTION The present invention comprises an illuminator inverter circuit based on the power supply circuit previously proposed by the present applicant (Japanese Patent Application No. 5-177379). A smoothing capacitor is connected between output terminals of a full-wave rectifier connected to an AC power source, a parallel circuit of an inductor and a capacitor is connected in series with a switching element between the terminals of the smoothing capacitor, and a fluorescent lamp is connected in parallel with the inductor. And a series circuit of a current limiting inductor are connected, and a control winding wound on the same iron core of the inductor is provided in an inverter circuit in which a fluorescent lamp is turned on by turning on and off the switching element. The auxiliary inductor and the control winding of the inductor are connected in series between the rectifier and the smoothing capacitor.
【０００６】[0006]
【実施例】図１は本発明の一実施例回路図で、従来例と
同一符号は同等部分を示す。本発明は従来例と対比して
明らかなように全波整流器２の出力側の一端（＋）と平
滑用コンデンサの一端（＋）間に点灯用インダクタ２１
と同一鉄心上に巻装された制御巻線２１ｂと補助インダ
クタンス２０の直列回路を挿入したことである。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a circuit diagram of an embodiment of the present invention. As is clear from comparison with the conventional example, the present invention provides a lighting inductor 21 between one end (+) on the output side of the full-wave rectifier 2 and one end (+) of the smoothing capacitor.
That is, a series circuit of the control winding 21b and the auxiliary inductance 20 wound on the same iron core is inserted.
【０００７】この回路の動作は、先ず点灯用インダクタ
２１をトランス等の１次巻線と想定 （４） し、該インダクタ２１と制御巻線２１ｂの巻数を同一と
するとスイッチング素子１０のオン、オフにより全波整
流器２の出力電流Ｉｉｎの波形は近似的に正弦波になり
（特願平５−１７７３７９号）、力率が改善されること
に着目し、点灯用インバ−タ回路を構成したものであり
スイッチング素子１０のオン、オフによる点灯動作は従
来例とほぼ同様であるが、蛍光灯に印加される商用入力
電流が、ほぼ正弦波のために点灯時の高周波電流が減少
し、ノイズが発生し難い。因みに、スイッチング素子１
０がオンの期間に、平滑コンデンサ７のエネルギ−は、
インダクタ２１に蓄えられ、スイッチング素子１０がオ
フの期間に、インダクタ２１に蓄えられたエネルギ−
が、コンデンサ９と共振して蛍光灯１２に送られると同
時に、補助インダクタ２０の電流は、制御巻線２１ｂを
介して平滑コンデンサ７に流れ込み、同時に、制御巻線
２１ｂを流れた結果、それに対応する電流が、インダク
タ２１を介して蛍光灯１２に流れる。In the operation of this circuit, assuming that the lighting inductor 21 is a primary winding such as a transformer (4), and the inductor 21 and the control winding 21b have the same number of turns, the switching element 10 is turned on and off. As a result, the waveform of the output current Iin of the full-wave rectifier 2 becomes approximately a sine wave (Japanese Patent Application No. 5-177379), and the power factor is improved, and a lighting inverter circuit is constructed. Thus, the lighting operation by turning on / off the switching element 10 is almost the same as the conventional example, but the commercial input current applied to the fluorescent lamp is almost a sine wave, so that the high-frequency current at the time of lighting is reduced and noise is generated. Hard to occur. By the way, switching element 1
While 0 is on, the energy of the smoothing capacitor 7 is
The energy stored in the inductor 21 and stored in the inductor 21 while the switching element 10 is off
However, the current of the auxiliary inductor 20 flows into the smoothing capacitor 7 through the control winding 21b at the same time as the current is sent to the fluorescent lamp 12 in resonance with the capacitor 9 and, at the same time, flows in the control winding 21b. The current that flows flows through the inductor 21 to the fluorescent lamp 12.
【０００８】図２は本発明の他の実施例回路であり、制
御巻線２１ｂと直列にコンデンサ２３を接続し、この直
列回路に並列にダイオ−ド２２を接続した例を示すもの
でスイッチング素子１０がオンの場合、補助インダクタ
２０の電流はコンデンサ２３を介して制御巻線２１ｂと
インダクタ２１、及びスイッチング素子１０を通って流
れるのでコンデンサ２３が電圧を持ち始め、その電圧
が、平滑コンデンサ７の電圧よりも高くなると、補助イ
ンダクタ２０の電流は、ダイオ−ド２２を通って、平滑コ
ンデンサ７に流れ込む。即ち、スイッチング素子１０が
オンしているにもかかわらず、補助インダクタ２０の昇
圧時間が短くなり、これは、入力電圧Ｖinが高いほど昇
圧時間は短くなる。また、スイッチング素子１０がオフ
の期間にはインダクタ２０の電流は、ダイオ−ド２２を
介して、平滑コンデンサ７に流れ込み、また同時に、制
御巻線２１ｂからの励磁電流が、コンデンサ２３とダイ
オ−ド２２を通って流れ、コンデンサ２３は、スイッチ
ング素子１０がオン期間とは逆方向に充電され、電圧が
下がる。即ち、この実施例では、インダクタ２０の昇圧
時間が、入力電圧Ｖin(4)が高いほど短くなるために、
インダクタ２０の電流が、スイッチング素子１０がオフ
の （５） 期間に、零アンペアにもどらない連続型のモ−ドであっ
ても、入力電流波形Ｉinが、概ね、正弦波に対応した波
形となり力率が高くなり、点灯用電源として更に好適で
ある。FIG. 2 is a circuit diagram of another embodiment of the present invention, which shows an example in which a capacitor 23 is connected in series with a control winding 21b, and a diode 22 is connected in parallel with this series circuit. When 10 is on, the current of the auxiliary inductor 20 flows through the control winding 21b, the inductor 21, and the switching element 10 via the capacitor 23, so that the capacitor 23 starts to have a voltage, and the voltage of the smoothing capacitor 7 When the voltage becomes higher than the voltage, the current of the auxiliary inductor 20 flows into the smoothing capacitor 7 through the diode 22. That is, although the switching element 10 is turned on, the boosting time of the auxiliary inductor 20 becomes shorter, and the boosting time becomes shorter as the input voltage Vin is higher. Further, while the switching element 10 is off, the current of the inductor 20 flows into the smoothing capacitor 7 via the diode 22, and at the same time, the exciting current from the control winding 21b is transferred to the capacitor 23 and the diode. Flowing through the capacitor 22, the capacitor 23 is charged in the direction opposite to the ON period of the switching element 10 and the voltage drops. That is, in this embodiment, the boosting time of the inductor 20 becomes shorter as the input voltage Vin (4) becomes higher.
Even if the current of the inductor 20 is a continuous mode in which the switching element 10 is off (5) and does not return to zero ampere, the input current waveform Iin becomes a waveform substantially corresponding to a sine wave. The rate is high and it is more suitable as a power source for lighting.
【０００９】図３は本発明の他の実施例回路図であり平
滑用コンデンサ２７、２８を倍電圧整流の形式に適用し
たものであり、これによっても同様な効果を得る。な
お、図中２５、２６は補助インダクタ、２４ｂ、２４ｃ
は制御巻線である。FIG. 3 is a circuit diagram of another embodiment of the present invention in which the smoothing capacitors 27 and 28 are applied to the double voltage rectification type, and the same effect can be obtained. In the figure, 25 and 26 are auxiliary inductors, and 24b and 24c.
Is the control winding.
【００１０】図５は上記実施例（図１、図２、図３）に
適用できる他の点灯回路例を示すものでスイッチング素
子の駆動回路１１の信号によりスイッチング素子１０
ａ、１０ｂは交互にオン／オフする。スイッチング素子
１０ａの初期オン時コンデンサ７からスイッチング素子
１０ａ、共振用コンデンサ９、電流制限用インダクタ２
１ａ、蛍光灯ランプ１２、コンデンサ１３、の径路で前
記蛍光灯ランプ１２のフィラメントに予熱電流が流れ
る。又スイッチング素子１０ｂの初期オフ時は、コンデ
ンサ９に蓄積されたエネルギ−はスイッチング素子１０
ｂ、蛍光灯ランプ１２、コンデンサ９、の径路で予熱電
流が流れ蛍光灯ランプ１２は要求点灯開始電圧が低下す
る。このスイッチング素子１０ａ、１０ｂが交互にオン
／オフを繰り返すことにより、蛍光灯ランプ１２は点灯
し継続して発光する。FIG. 5 shows another example of a lighting circuit applicable to the above embodiment (FIGS. 1, 2 and 3). The switching element 10 is driven by a signal from the switching element drive circuit 11.
a and 10b are alternately turned on / off. When the switching element 10a is initially turned on, from the capacitor 7 to the switching element 10a, the resonance capacitor 9, the current limiting inductor 2
A preheating current flows through the filament of the fluorescent lamp 12 in the path of 1a, the fluorescent lamp 12, and the condenser 13. When the switching element 10b is initially turned off, the energy stored in the capacitor 9 is stored in the switching element 10b.
b, the preheating current flows in the path of the fluorescent lamp 12 and the condenser 9, and the required lighting start voltage of the fluorescent lamp 12 decreases. When the switching elements 10a and 10b are alternately turned on / off, the fluorescent lamp 12 lights up and continuously emits light.
【００１１】[0011]
【発明の効果】以上の説明から明らかなように本発明に
よれば点灯用入力電源として力率改善を図った電源を適
用できるので点灯時のラインノイズが防止でき、安定し
た点灯維持が可能である等、実用上の効果は大きい。As is apparent from the above description, according to the present invention, since a power source with improved power factor can be applied as a lighting input power source, line noise during lighting can be prevented and stable lighting can be maintained. There are many practical effects.
【図１】本発明の一実施例回路図FIG. 1 is a circuit diagram of an embodiment of the present invention.
【図２】本発明の他の実施例回路図 （６）FIG. 2 is a circuit diagram of another embodiment of the present invention (6)
【図３】本発明の他の実施例回路図FIG. 3 is a circuit diagram of another embodiment of the present invention.
【図４】従来回路図FIG. 4 Conventional circuit diagram
【図５】本発明の実施例に適用できる他の点灯回路図FIG. 5 is another lighting circuit diagram applicable to the embodiment of the present invention.
１ 交流電源 ２ 全波整流器 ７、２７、２８ 平滑用コンデンサ ９ 共振用コンデンサ １０、１０ａ、１０ｂ スイッチング素子 １１ 駆動回路 １２ ランプ（蛍光灯） ２１ インダクタ ２０、２５、２６ 補助インダクタ ２１ｂ、２４ｂ、２４ｃ 制御巻線 1 AC power supply 2 Full-wave rectifier 7, 27, 28 Smoothing capacitor 9 Resonance capacitor 10, 10a, 10b Switching element 11 Drive circuit 12 Lamp (fluorescent lamp) 21 Inductor 20, 25, 26 Auxiliary inductor 21b, 24b, 24c Control Winding
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大友 隆 埼玉県飯能市南町10番13号新電元工業株式 会社工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Otomo Shindengen Industrial Co., Ltd. 10-13 Minamimachi, Hanno City, Saitama Prefecture
Claims (4)
子間に平滑コンデンサを接続し、該平滑コンデンサの端
子間にインダクタとコンデンサの並列回路をスイッチン
グ素子と直列接続し、前記インダクタと並列に蛍光灯ラ
ンプと電流制限用インダクタの直列回路を接続し、該ス
イッチング素子のオン、オフにより蛍光灯ランプを点灯
させるようにしたインバ−タ回路において、該インダク
タの同一鉄心上に巻かれた制御巻線を設け、該整流器と
該平滑コンデンサの間に補助インダクタと該インダクタ
の制御巻線を直列に接続した事を特徴とする照明灯用イ
ンバ−タ回路1. A smoothing capacitor is connected between output terminals of a rectifier connected to an AC power source, a parallel circuit of an inductor and a capacitor is connected in series with a switching element between terminals of the smoothing capacitor, and the smoothing capacitor is connected in parallel with the inductor. In an inverter circuit in which a series circuit of a fluorescent lamp and a current limiting inductor is connected and the fluorescent lamp is turned on and off by turning on and off the switching element, a control winding wound on the same iron core of the inductor. Inverter circuit for illumination lamp, wherein a line is provided, and an auxiliary inductor and a control winding of the inductor are connected in series between the rectifier and the smoothing capacitor.
制御巻線とコンデンサの直列回路にダイオ−ドを接続し
た事を特徴とする請求項１記載の照明灯用インバ−タ回
路2. An inverter circuit for an illumination lamp according to claim 1, wherein a capacitor is provided in series with the control winding, and a diode is connected to the series circuit of the control winding and the capacitor.
を整流する第一のダイオ−ドと第一の平滑コンデンサを
直列接続し、該交流電源の負の半サイクルを整流する第
二のダイオ−ドと第二の平滑コンデンサを直列接続し、
前記第一、第二の平滑コンデンサ直列接続の端子間にイ
ンダクタとコンデンサの並列回路をスイッチング素子と
直列接続し、該インダクタと並列に蛍光灯ランプと電流
制限用インダクタの直列回路を接続し、該スイッチング
素子のオン、オフにより蛍光灯ランプを点灯させるよう
にしたインバ−タ回路において、該インダクタの同一鉄
心に巻かれた第一、第二の制御巻線を設け該第一のダイ
オ−ドと該第一の平滑コンデンサの間に補助インダクタ
１と該第一の制御巻線を直列に接続し、該第二のダイオ
−ドと第二の平滑コンデンサの間に補助インダクタ２と
該第二の制御巻線を直列に接続した事を特徴とする照明
灯用インバ−タ回路3. A second diode for rectifying a negative half cycle of the AC power supply, wherein a first diode for rectifying a positive half cycle of the AC power supply and a first smoothing capacitor are connected in series to the AC power supply. Connect the diode and the second smoothing capacitor in series,
A parallel circuit of an inductor and a capacitor is connected in series with a switching element between the terminals of the first and second smoothing capacitor series connections, and a series circuit of a fluorescent lamp and a current limiting inductor is connected in parallel with the inductor. In an inverter circuit in which a fluorescent lamp is turned on by turning on and off a switching element, first and second control windings wound around the same iron core of the inductor are provided and the first diode and The auxiliary inductor 1 and the first control winding are connected in series between the first smoothing capacitor, and the auxiliary inductor 2 and the second control capacitor are connected between the second diode and the second smoothing capacitor. Inverter circuit for lighting, characterized by connecting control windings in series
子間に平滑コンデンサを接続し、該平滑コンデンサの端
子間に第一のスイッチング素子と第二のスイッチング素
子を直列接続し、前記第一、第二のスイッチング素子の
接続点より共 （２） 振用コンデンサと電流制限用インダクタと蛍光灯ランプ
の直列回路を該第一、第二のスイッチング素子の他端に
接続し、該スイッチング素子のオン、オフにより蛍光灯
ランプを点灯させるようにしたインバ−タ回路におい
て、該電流制限用インダクタの同一鉄心上に巻かれた制
御巻線を設け、該整流器と該平滑コンデンサの間に補助
インダクタと該インダクタの制御巻き線を直列に接続し
た事を特徴とする照明灯用インバ−タ回路4. A smoothing capacitor is connected between the output terminals of a rectifier connected to an AC power source, and a first switching element and a second switching element are connected in series between the terminals of the smoothing capacitor. From the connection point of the second switching element (2) A series circuit of a vibration condenser, a current limiting inductor, and a fluorescent lamp is connected to the other ends of the first and second switching elements, and In an inverter circuit for turning on and off a fluorescent lamp, a control winding wound on the same iron core of the current limiting inductor is provided, and an auxiliary inductor is provided between the rectifier and the smoothing capacitor. Inverter circuit for illumination lamp characterized in that control windings of the inductor are connected in series
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6277092A JPH08115792A (en) | 1994-10-17 | 1994-10-17 | Inverter circuit for illumination lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6277092A JPH08115792A (en) | 1994-10-17 | 1994-10-17 | Inverter circuit for illumination lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08115792A true JPH08115792A (en) | 1996-05-07 |
Family
ID=17578668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6277092A Pending JPH08115792A (en) | 1994-10-17 | 1994-10-17 | Inverter circuit for illumination lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08115792A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852607A (en) * | 2012-12-11 | 2015-08-19 | 矽力杰半导体技术(杭州)有限公司 | AC-DC power converter |
-
1994
- 1994-10-17 JP JP6277092A patent/JPH08115792A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852607A (en) * | 2012-12-11 | 2015-08-19 | 矽力杰半导体技术(杭州)有限公司 | AC-DC power converter |
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