JPH08185993A - Power unit - Google Patents
Power unitInfo
- Publication number
- JPH08185993A JPH08185993A JP6327355A JP32735594A JPH08185993A JP H08185993 A JPH08185993 A JP H08185993A JP 6327355 A JP6327355 A JP 6327355A JP 32735594 A JP32735594 A JP 32735594A JP H08185993 A JPH08185993 A JP H08185993A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- circuit
- voltage
- power
- power failure
- 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.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電源装置に関するもの
であり、更に詳しくは、放電灯点灯装置の電源装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device, and more particularly to a power supply device for a discharge lamp lighting device.
【０００２】[0002]
【従来の技術】従来の放電灯点灯装置のブロック構成図
を図７に示す。（第１従来例） 本構成は、フィルター回路１，整流器２を介して交流電
源ＡＣを整流した直流電圧を、直流電源３で所望の直流
電圧に変圧しインバータ回路４に入力し、インバータ回
路４より交流の高周波電力を供給して放電灯Ｌａを点灯
するものであり、フィルター回路１，整流器２，直流電
源３，インバータ回路４より放電灯点灯装置５を構成す
る。ここで、図８（ａ）に交流電源ＡＣの電圧波形，図
８（ｂ）に整流器２の出力電圧波形，図８（ｃ）に直流
電源３の出力電圧波形，図８（ｄ）にインバータ回路４
の出力電圧波形を示す。また、直流電源３としてインダ
クタンス素子Ｌ１，スイッチング素子Ｓ１，ダイオード
Ｄ１，キャパシタンス素子Ｃ１からなる所謂昇圧チョッ
パ回路３を用いた回路を図９に示す。（第２従来例）な
お、昇圧チョッパ回路３は一般的な回路であるので動作
の説明は省略する。2. Description of the Related Art A block diagram of a conventional discharge lamp lighting device is shown in FIG. (First Conventional Example) In this configuration, the DC voltage obtained by rectifying the AC power supply AC via the filter circuit 1 and the rectifier 2 is transformed into a desired DC voltage by the DC power supply 3 and input to the inverter circuit 4, and the inverter circuit 4 The discharge lamp La is lit by supplying more alternating high-frequency power, and the discharge lamp lighting device 5 is composed of the filter circuit 1, the rectifier 2, the DC power source 3, and the inverter circuit 4. Here, FIG. 8A shows the voltage waveform of the AC power supply AC, FIG. 8B shows the output voltage waveform of the rectifier 2, FIG. 8C shows the output voltage waveform of the DC power supply 3, and FIG. 8D shows the inverter. Circuit 4
The output voltage waveform of is shown. Further, FIG. 9 shows a circuit using a so-called step-up chopper circuit 3 composed of an inductance element L1, a switching element S1, a diode D1, and a capacitance element C1 as the DC power supply 3. (Second Conventional Example) Since the step-up chopper circuit 3 is a general circuit, description of its operation is omitted.
【０００３】図９に示す回路に於て、時刻ｔ１で交流電
源ＡＣの瞬時停電などが生じると（図１０（ａ））、図
１０（ｂ）に示す様に直流電源３の出力電圧（＝キャパ
シタンス素子Ｃ１の両端電圧ＶＣ１）は、点灯維持電圧
Ｖａから低下していく。時刻ｔ２でキャパシタンス素子
Ｃ１の両端電圧ＶＣ１が放電灯Ｌａの点灯維持可能最低
電圧Ｖｂに達すると放電灯Ｌａは消灯する（図１０
（ｃ））。時刻ｔ３で交流電源ＡＣが復帰するとキャパ
シタンス素子Ｃ１の両端電圧ＶＣ１は上昇していき、時
刻ｔ４でキャパシタンス素子Ｃ１の両端電圧ＶＣ１が点
灯維持可能最低電圧Ｖｂに達すると、放電灯Ｌａは再点
灯する（図１０（ｃ））。 この様に、図９に示した様
な従来の放電灯点灯装置では交流電源ＡＣの瞬時停電な
どが生じると放電灯Ｌａが消灯してしまう、という第１
の問題点が生じる。In the circuit shown in FIG. 9, when a momentary power failure of the AC power supply AC occurs at time t1 (FIG. 10 (a)), the output voltage (=) of the DC power supply 3 as shown in FIG. 10 (b). The voltage VC1) across the capacitance element C1 decreases from the lighting maintaining voltage Va. At time t2, when the voltage VC1 across the capacitance element C1 reaches the lowest voltage Vb at which the discharge lamp La can be kept on, the discharge lamp La is turned off (FIG. 10).
(C)). When the AC power supply AC is restored at time t3, the voltage VC1 across the capacitance element C1 rises, and when the voltage VC1 across the capacitance element C1 reaches the lighting sustainable minimum voltage Vb at time t4, the discharge lamp La is turned on again. (FIG.10 (c)). As described above, in the conventional discharge lamp lighting device as shown in FIG. 9, the discharge lamp La is turned off when a momentary power failure of the AC power supply AC occurs.
The problem of occurs.
【０００４】また、図９に示す回路に於て放電灯Ｌａに
水銀灯、高圧ナトリウムランプなどのＨＩＤランプを用
いると、ＨＩＤランプＬａ消灯後のランプ管内が高温、
高圧になることによってＨＩＤランプＬａの絶縁破壊電
圧が高くなり、ＨＩＤランプＬａの再始動に５分〜１０
分程度の時間を要するので、交流電源ＡＣの瞬時停電が
生じると長時間の不点灯状態が継続されてしまう、とい
う第２の問題点が生じる。In the circuit shown in FIG. 9, when an HID lamp such as a mercury lamp or a high-pressure sodium lamp is used as the discharge lamp La, the temperature inside the lamp tube after the HID lamp La is turned off is high.
The high voltage increases the breakdown voltage of the HID lamp La, and it takes 5 minutes to 10 minutes to restart the HID lamp La.
Since a time of about a minute is required, there arises a second problem that a non-lighting state is continued for a long time if an instantaneous power failure of the AC power supply AC occurs.
【０００５】上記第２の問題点を解決する手段として、
図１１のブロック構成図に示すものがある（第３従来
例）。本構成は、放電灯点灯装置５と並列に光束補償装
置６を接続し、光束補償装置６の出力端に、例えば光束
の立上りの早い白熱灯７を接続して、ＨＩＤランプＬａ
の不点灯、始動時などの光束の少ないときに、白熱灯７
を点灯させて見かけの光束を補う様にしたものである。As means for solving the above second problem,
There is one shown in the block diagram of FIG. 11 (third conventional example). In this configuration, a luminous flux compensator 6 is connected in parallel with the discharge lamp lighting device 5, and an incandescent lamp 7 with a fast rise of luminous flux is connected to the output end of the luminous flux compensator 6 to obtain the HID lamp La.
The incandescent lamp 7
Is lit to supplement the apparent luminous flux.
【０００６】本構成の動作波形図を図１２に示して、動
作を簡単に説明する。時刻ｔ０で交流電源ＡＣが投入さ
れると（図１２（ａ））、図１２（ｃ）に示す様にＨＩ
ＤランプＬａの両端電圧ＶＬａが徐々に上昇していくの
で、図１２（ｂ）に示す様にＨＩＤランプＬａの光束Φ
Ｌａは徐々に上昇していく。光束補償装置６はＨＩＤラ
ンプのＬａの両端電圧ＶＬａを検出して、図１２（ｄ）
に示す様に白熱灯７を点灯させて見かけの光束を補う。
時刻ｔ１でＨＩＤランプのＬａの両端電圧ＶＬａがスレ
ッショルド電圧Ｖｄを越えると光束補償装置６により白
熱灯７は消灯すると共にＨＩＤランプＬａが点灯する。
時刻ｔ２で交流電源ＡＣの瞬時停電が生じると、ＨＩＤ
ランプＬａは消灯してしまい、交流電源ＡＣが復帰して
もＨＩＤランプＬａは直ぐには再点灯せずに無負荷状態
になる。その為に、図１２（ｃ）に示す様にＨＩＤラン
プのＬａの両端電圧ＶＬａは大きくなり、ＨＩＤランプ
のＬａの両端電圧ＶＬａがスレッショルド電圧Ｖｅを越
えると、図１２（ｄ）に示す様に白熱灯７を点灯させて
見かけの光束を補う。時刻ｔ２より一定時間経過する
と、ＨＩＤランプＬａの管内温度が低下してＨＩＤラン
プＬａは始動・点灯しやすくなり、時刻ｔ３でＨＩＤラ
ンプＬａが始動する。時刻ｔ４になると、時刻ｔ１の場
合と同様にして、時刻ｔ４でＨＩＤランプのＬａの両端
電圧ＶＬａがスレッショルド電圧Ｖｄを越えると光束補
償装置６により白熱灯７は消灯すると共に、ＨＩＤラン
プＬａが点灯する。 しかし上記第３従来例に於ては、
白熱灯７の様な別の光源、ランプ電圧検出回路、点灯，
不点灯を判別する判別回路などを備える必要が生じ、装
置の大型化、コスト上昇などの第３の問題点が生じる。The operation waveform diagram of this configuration is shown in FIG. 12, and the operation will be briefly described. When the AC power supply AC is turned on at time t0 (FIG. 12 (a)), as shown in FIG. 12 (c), HI
Since the voltage VLa across the D lamp La gradually rises, the luminous flux Φ of the HID lamp La as shown in FIG.
La gradually rises. The light flux compensating device 6 detects the voltage VLa across La of the HID lamp, and FIG.
The incandescent lamp 7 is turned on as shown in to supplement the apparent luminous flux.
When the voltage VLa across La of the HID lamp exceeds the threshold voltage Vd at time t1, the incandescent lamp 7 is turned off by the light flux compensating device 6 and the HID lamp La is turned on.
If an instantaneous power failure of the AC power supply AC occurs at time t2, HID
The lamp La is turned off, and even if the AC power supply AC is restored, the HID lamp La does not immediately re-light but becomes in a no-load state. Therefore, as shown in FIG. 12C, the voltage VLa across the La of the HID lamp becomes large, and when the voltage VLa across the La of the HID lamp exceeds the threshold voltage Ve, as shown in FIG. 12D. The incandescent lamp 7 is turned on to supplement the apparent luminous flux. After a lapse of a certain time from time t2, the temperature inside the HID lamp La decreases, and the HID lamp La easily starts and lights up. At time t3, the HID lamp La starts. At time t4, as at time t1, when the voltage VLa across La of the HID lamp exceeds the threshold voltage Vd at time t4, the light flux compensator 6 turns off the incandescent lamp 7 and turns on the HID lamp La. To do. However, in the third conventional example,
Another light source such as incandescent lamp 7, lamp voltage detection circuit, lighting,
It becomes necessary to provide a discrimination circuit for discriminating non-lighting, which causes a third problem such as an increase in size of the device and an increase in cost.
【０００７】上記第３の問題点を解決する手段として、
図１３の回路図に示すものがある（第４従来例）。本構
成は、昇圧チョッパ回路３の出力端にキャパシタンス素
子Ｃ２〜Ｃｎ（ｎは自然数）からなる停電補償回路８を
並列接続したものであり、キャパシタンス素子Ｃ１の両
端電圧ＶＣ１の電圧降下に時間を要するので、ＨＩＤラ
ンプＬａ点灯中に交流電源ＡＣの瞬時停電が生じても交
流電源ＡＣの復帰までの時間の点灯維持が可能となり、
ＨＩＤランプＬａの立消えを解消できる。As a means for solving the above-mentioned third problem,
There is one shown in the circuit diagram of FIG. 13 (fourth conventional example). In this configuration, a power failure compensation circuit 8 including capacitance elements C2 to Cn (n is a natural number) is connected in parallel to the output terminal of the boost chopper circuit 3, and it takes time for the voltage VC1 to drop across the capacitance element C1. Therefore, even if an instantaneous power failure of the AC power supply AC occurs while the HID lamp La is lit, it is possible to maintain the lighting until the AC power supply AC returns,
The disappearance of the HID lamp La can be eliminated.
【０００８】また、本発明に係る第５従来例として特公
昭６２ー４５７９６号公報に示したものがあり、その回
路図を図１４に、動作波形図を図１５に示す。A fifth conventional example according to the present invention is disclosed in Japanese Patent Publication No. 62-45796, and its circuit diagram is shown in FIG. 14 and its operation waveform diagram is shown in FIG.
【０００９】本従来例は、交流電源ＡＣ（図１４（ａ）
に示す。）を整流器２で全波整流した直流電圧Ｖｆ（図
１４（ｂ）に示す。）を、インバータ回路４で図１４
（ｃ）に示す様な高周波電圧Ｖｚに変換して負荷Ｚに供
給すると共に、インバータ回路４から出力される高周波
電圧Ｖｚをフィードバック整流回路９で整流し、ダイオ
ードＤ２を介して整流器２の出力端に並列接続されたキ
ャパシタンス素子Ｃｘを充電することにより、整流器２
の出力端に並列接続されたキャパシタンス素子Ｃｙの両
端電圧ＶＣｙを略一定にして高効率を実現するものであ
る。In this conventional example, an AC power source AC (see FIG. 14A) is used.
Shown in 14) is full-wave rectified by the rectifier 2 to generate a DC voltage Vf (shown in FIG. 14B) in the inverter circuit 4.
The high frequency voltage Vz as shown in (c) is supplied to the load Z, and the high frequency voltage Vz output from the inverter circuit 4 is rectified by the feedback rectifier circuit 9 and the output terminal of the rectifier 2 via the diode D2. By charging the capacitance element Cx connected in parallel to the rectifier 2
In order to achieve high efficiency, the voltage VCy across the capacitance element Cy connected in parallel to the output terminal of is substantially constant.
【００１０】[0010]
【発明が解決しようとする課題】しかし上記第４従来例
に於ては、高耐圧で大容量のキャパシタンス素子Ｃ１〜
Ｃｎを設けるので、装置の大型化、電源投入時の突入電
流の増大、コスト増大などの第４の問題点が生じる。However, in the fourth conventional example, the capacitance elements C1 to C1 of high withstand voltage and large capacity are provided.
Since Cn is provided, there is a fourth problem such as an increase in the size of the device, an increase in inrush current when the power is turned on, and an increase in cost.
【００１１】また、上記第５従来例に於ては、交流電源
ＡＣの瞬時停電などによる放電灯の立消えを防ぐ機能を
有していないので、交流電源ＡＣの瞬時停電が生じると
長時間の不点灯状態が継続されてしまう、という第５の
問題点が生じる。Further, the fifth conventional example does not have a function of preventing the discharge lamp from extinguishing due to a momentary power failure of the AC power supply AC. A fifth problem is that the lighting state continues.
【００１２】本発明は、上記問題点に鑑みてなされたも
ので、その目的とするところは、交流電源ＡＣの瞬時停
電による放電灯の立消え防止、小型化、低コスト化可能
な電源装置を提供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to provide a power supply device capable of preventing extinction of a discharge lamp due to an instantaneous power failure of an AC power supply AC, downsizing, and cost reduction. To do.
【００１３】[0013]
【課題を解決するための手段】上記の問題を解決するた
めに、請求項１記載の発明によれば、交流電源を整流器
を介して整流平滑する直流電源と、直流電源を交流の高
周波電力に変換して放電灯に供給するインバータ回路と
を備える電源装置に於て、交流電源の瞬時停電時にイン
バータ回路に直流電圧を供給する停電補償回路を設ける
と共に、停電補償回路の出力電圧は、直流電源電圧より
も低く、且つ放電灯の安定点灯を維持する点灯維持電圧
よりも高いことを特徴とする。In order to solve the above problems, according to the invention of claim 1, a DC power supply for rectifying and smoothing an AC power supply via a rectifier, and a DC power supply for AC high frequency power. In a power supply device including an inverter circuit for converting and supplying to a discharge lamp, a power failure compensating circuit that supplies a DC voltage to the inverter circuit in the event of a momentary power failure of the AC power source is provided, and the output voltage of the power failure compensating circuit is a DC power source. It is characterized by being lower than the voltage and higher than the lighting maintaining voltage for maintaining stable lighting of the discharge lamp.
【００１４】請求項２記載の発明によれば、停電補償回
路は、整流器の両端に並列接続された少なくとも１つの
キャパシタンス素子からなることを特徴とする。According to a second aspect of the present invention, the power failure compensating circuit comprises at least one capacitance element connected in parallel at both ends of the rectifier.
【００１５】請求項３記載の発明によれば、停電補償回
路は、整流器の両端に並列接続されたチョッパ回路と、
チョッパ回路の出力端に並列接続された少なくとも１つ
のキャパシタンス素子とからなることを特徴とする。According to the third aspect of the invention, the power failure compensating circuit includes a chopper circuit connected in parallel at both ends of the rectifier,
It is characterized by comprising at least one capacitance element connected in parallel to the output end of the chopper circuit.
【００１６】請求項４記載の発明によれば、停電補償回
路は、直流電源の両端に接続された少なくとも複数のキ
ャパシタンス素子の直列回路からなると共に、直流電源
の出力電圧を降圧するものであることを特徴とする。According to the fourth aspect of the present invention, the power failure compensating circuit is composed of a series circuit of at least a plurality of capacitance elements connected to both ends of the DC power supply and reduces the output voltage of the DC power supply. Is characterized by.
【００１７】請求項５記載の発明によれば、交流電源を
整流器を介して整流平滑する直流電源と、直流電源を交
流の高周波電力に変換して放電灯に供給するインバータ
回路と、インバータ回路を制御する制御回路と、制御回
路を駆動する電源回路とを備える電源装置に於て、交流
の瞬時停電時に制御回路に直流電圧を供給する停電補償
電源回路を設けると共に、停電補償電源回路の出力電圧
は、電源回路の出力電圧よりも低く、且つ制御回路の最
低駆動電圧よりも高いことを特徴とする。According to the present invention, a DC power supply for rectifying and smoothing an AC power supply through a rectifier, an inverter circuit for converting the DC power supply into AC high frequency power and supplying it to a discharge lamp, and an inverter circuit are provided. In a power supply device including a control circuit for controlling and a power supply circuit for driving the control circuit, a power failure compensating power supply circuit for supplying a DC voltage to the control circuit at the time of an instantaneous AC power failure is provided, and an output voltage of the power failure compensating power supply circuit Is lower than the output voltage of the power supply circuit and higher than the minimum drive voltage of the control circuit.
【００１８】[0018]
【作用】請求項１記載の発明によれば、交流電源通電時
は、インバータ回路により直流電源出力を交流の高周波
電力に変換して放電灯を安定点灯すると共に、停電補償
回路を、直流電源電圧よりも低く、且つ点灯維持電圧よ
りも高くまで充電する。交流電源遮断時は、停電補償回
路出力を、インバータ回路により交流の高周波電力に変
換して放電灯を安定点灯する。According to the first aspect of the present invention, when the AC power source is energized, the inverter circuit converts the DC power source output into AC high frequency power to stably light the discharge lamp, and the power failure compensating circuit is connected to the DC power source voltage. Lower than the above and higher than the lighting sustaining voltage. When the AC power supply is cut off, the output of the power failure compensation circuit is converted into AC high frequency power by the inverter circuit and the discharge lamp is lit stably.
【００１９】請求項２記載の発明によれば、交流電源通
電時は、停電補償回路を構成するキャパシタンス素子
を、交流電源より整流器を介して、直流電源電圧よりも
低く、且つ点灯維持電圧よりも高くまで充電する。交流
電源遮断時は、キャパシタンス素子の両端電圧を、イン
バータ回路により交流の高周波電力に変換して放電灯を
安定点灯する。According to the second aspect of the present invention, when the AC power supply is energized, the capacitance element forming the power failure compensation circuit is lower than the DC power supply voltage and lower than the lighting maintaining voltage via the rectifier from the AC power supply. Charge it high. When the AC power supply is cut off, the voltage across the capacitance element is converted into AC high-frequency power by the inverter circuit to stably light the discharge lamp.
【００２０】請求項３記載の発明によれば、交流電源通
電時は、交流電源を整流器を介してチョッパ回路で整流
平滑し、停電補償回路を構成するキャパシタンス素子
を、チョッパ回路の出力により直流電源電圧よりも低
く、且つ点灯維持電圧よりも高くまで充電する。交流電
源遮断時は、キャパシタンス素子の両端電圧を、インバ
ータ回路により交流の高周波電力に変換して放電灯を安
定点灯する。According to the third aspect of the present invention, when the AC power supply is energized, the AC power supply is rectified and smoothed by the chopper circuit via the rectifier, and the capacitance element forming the power failure compensation circuit is supplied to the DC power supply by the output of the chopper circuit. It is charged to a voltage lower than the voltage and higher than the lighting maintaining voltage. When the AC power supply is cut off, the voltage across the capacitance element is converted into AC high-frequency power by the inverter circuit to stably light the discharge lamp.
【００２１】請求項４記載の発明によれば、交流電源通
電時は、停電補償回路を構成する複数のキャパシタンス
素子の各々を、直流電源出力により、直流電源電圧より
も低く、且つ点灯維持電圧よりも高くまで充電する。交
流電源遮断時は、複数のキャパシタンス素子の両端電圧
を、インバータ回路により交流の高周波電力に変換して
放電灯を安定点灯する。According to the invention as set forth in claim 4, when the AC power supply is energized, each of the plurality of capacitance elements forming the power failure compensation circuit is lower than the DC power supply voltage and lower than the lighting maintaining voltage by the DC power supply output. Charge up to high. When the AC power supply is cut off, the voltage across the plurality of capacitance elements is converted into AC high-frequency power by the inverter circuit to stably light the discharge lamp.
【００２２】請求項５記載の発明によれば、交流電源通
電時は、電源回路出力を制御回路に供給し、制御回路に
よりインバータ回路を駆動することにより、直流電源出
力を交流の高周波電力に変換して放電灯を安定点灯する
と共に、停電補償電源回路を、電源回路の出力電圧より
も低く、且つ制御回路の最低駆動電圧よりも高くまで充
電する。交流電源遮断時は、停電補償電源回路出力を制
御回路に供給し、制御回路によりインバータ回路を駆動
することにより、直流電源出力を交流の高周波電力に変
換して放電灯を安定点灯する。According to the fifth aspect of the present invention, when the AC power supply is energized, the power supply circuit output is supplied to the control circuit, and the inverter circuit is driven by the control circuit to convert the DC power supply output into AC high frequency power. Then, the discharge lamp is stably turned on, and the power failure compensation power supply circuit is charged to a voltage lower than the output voltage of the power supply circuit and higher than the minimum drive voltage of the control circuit. When the AC power supply is cut off, the output of the power failure compensation power supply circuit is supplied to the control circuit, and the inverter circuit is driven by the control circuit to convert the DC power supply output to AC high-frequency power to stably light the discharge lamp.
【００２３】[0023]
（実施例１）本発明に係る第１実施例の回路図を図１
に、その動作波形図を図２に示す。(Embodiment 1) FIG. 1 is a circuit diagram of a first embodiment according to the present invention.
2 shows the operation waveform diagram.
【００２４】図１３に示した第４従来例と異なる点は、
整流器２の出力端に並列接続されたチョッパ回路３１
と、チョッパ回路３１の出力端に並列接続されたキャパ
シタンス素子Ｃ２〜Ｃｎ（ｎは自然数）の並列回路１０
と、並列回路１０の高圧側及び昇圧チョッパ回路３の出
力端の高圧側を接続したダイオードＤ３とを備える停電
補償回路８１を設けたことであり、その他の第４従来例
と同一構成には同一符号を付すことにより説明を省略す
る。 次に、図２を参照して動作を簡単に説明する。The difference from the fourth conventional example shown in FIG. 13 is that
Chopper circuit 31 connected in parallel to the output terminal of the rectifier 2.
And a parallel circuit 10 of capacitance elements C2 to Cn (n is a natural number) connected in parallel to the output terminal of the chopper circuit 31.
And a diode D3 connecting the high-voltage side of the parallel circuit 10 and the high-voltage side of the output end of the step-up chopper circuit 3 are provided, and the same configuration as other fourth conventional examples is provided. The description is omitted by attaching the reference numerals. Next, the operation will be briefly described with reference to FIG.
【００２５】ここでＨＩＤランプＬａが正常点灯してい
る場合に、キャパシタンス素子Ｃ１は予め点灯維持電圧
Ｖａまで充電されており、キャパシタンス素子Ｃ２〜Ｃ
ｎは、予め電圧Ｖｇ（但し、Ｖｂ＜Ｖｇ＜Ｖａ。）まで
充電されている。また、キャパシタンス素子Ｃ２〜Ｃｎ
の合成容量値は、キャパシタンス素子Ｃ２〜Ｃｎの両端
電圧ＶＣ２が、交流電源ＡＣの瞬時停電中に点灯維持可
能最低電圧Ｖｂより小さくならない程度で、且つキャパ
シタンス素子Ｃ１の容量値よりも大きいとする。Here, when the HID lamp La is normally lit, the capacitance element C1 is charged in advance to the lighting maintaining voltage Va, and the capacitance elements C2 to C
n is previously charged to a voltage Vg (however, Vb <Vg <Va.). In addition, the capacitance elements C2 to Cn
It is assumed that the combined capacitance value of 1 is larger than the capacitance value of the capacitance element C1 such that the voltage VC2 across the capacitance elements C2 to Cn does not become smaller than the minimum voltage Vb at which lighting can be maintained during the momentary power failure of the AC power supply AC.
【００２６】時刻ｔ１で交流電源ＡＣの瞬時停電が生じ
ると、キャパシタンス素子Ｃ１の容量値はキャパシタン
ス素子Ｃ２〜Ｃｎの合成容量値よりも小さいので、図２
（ａ）に示す様に、キャパシタンス素子Ｃ１の両端電圧
ＶＣ１は急激に低下する。一方、キャパシタンス素子Ｃ
２〜Ｃｎの両端電圧ＶＣ２は、図２（ｂ）に示す様に、
ゆっくりと低下する。時刻ｔ２でＶＣ１＝ＶＣ２になる
と、時刻ｔ２以降はキャパシタンス素子Ｃ２〜Ｃｎより
キャパシタンス素子Ｃ１に電荷が移動する。よって、図
２（ａ）に示す様に、キャパシタンス素子Ｃ１の両端電
圧ＶＣ１はキャパシタンス素子Ｃ２〜Ｃｎの両端電圧Ｖ
Ｃ２と等しくゆっくりと低下していくと共に、インバー
タ回路４はキャパシタンス素子Ｃ２〜Ｃｎの両端電圧Ｖ
Ｃ２で駆動する。時刻ｔ３で交流電源ＡＣが復帰する
と、キャパシタンス素子Ｃ１〜Ｃｎは再び充電されるの
で、キャパシタンス素子Ｃ１の両端電圧ＶＣ１，キャパ
シタンス素子Ｃ２〜Ｃｎの両端電圧ＶＣ２は上昇する。When a momentary power failure of the AC power supply AC occurs at time t1, the capacitance value of the capacitance element C1 is smaller than the combined capacitance value of the capacitance elements C2 to Cn.
As shown in (a), the voltage VC1 across the capacitance element C1 drops sharply. On the other hand, the capacitance element C
The voltage VC2 between 2 and Cn is, as shown in FIG.
Slowly falls. When VC1 = VC2 at time t2, electric charges move from the capacitance elements C2 to Cn to the capacitance element C1 after time t2. Therefore, as shown in FIG. 2A, the voltage VC1 across the capacitance element C1 is equal to the voltage V1 across the capacitance elements C2 to Cn.
The inverter circuit 4 decreases slowly like C2, and the voltage V across the capacitance elements C2 to Cn increases.
Drive with C2. When the AC power supply AC is restored at time t3, the capacitance elements C1 to Cn are charged again, so that the voltage VC1 across the capacitance element C1 and the voltage VC2 across the capacitance elements C2 to Cn rise.
【００２７】また、放電灯の通常点灯時はＶａ＞Ｖｇで
あるのでダイオードＤ３はオフし、キャパシタンス素子
Ｃ２〜Ｃｎの充放電は行われない。When the discharge lamp is normally lit, Va> Vg, so the diode D3 is turned off and the capacitance elements C2 to Cn are not charged or discharged.
【００２８】この様に構成したことにより、キャパシタ
ンス素子Ｃ２〜Ｃｎは、キャパシタンス素子Ｃ１よりも
耐圧が低く、且つ寿命保障時間の短いものを用いること
ができるので、装置の小型化が可能となる。また、交流
電源ＡＣの瞬時停電による放電灯の立消え防止が可能と
なる。With this configuration, the capacitance elements C2 to Cn can have a lower withstand voltage and a shorter life guarantee time than the capacitance element C1, so that the device can be downsized. Further, it becomes possible to prevent the discharge lamp from extinguishing due to an instantaneous power failure of the AC power supply AC.
【００２９】なお、複数のキャパシタンス素子Ｃ２〜Ｃ
ｎを用いたが１つでも良い。また、整流器２の出力電圧
ＶｆがＶｂ＜Ｖｆ＜Ｖａであれば、図３に示す様にチョ
ッパ回路３１を用いなくても良い。A plurality of capacitance elements C2 to C
Although n is used, one may be used. If the output voltage Vf of the rectifier 2 is Vb <Vf <Va, the chopper circuit 31 need not be used as shown in FIG.
【００３０】（実施例２）本発明に係る第２実施例の回
路図を図４に示す。(Second Embodiment) FIG. 4 shows a circuit diagram of a second embodiment according to the present invention.
【００３１】図１示す第１実施例と異なる点は、停電補
償回路８１の代わりに、昇圧チョッパ回路３の出力端
に、ダイオードＤ４〜Ｄ６及びキャパシタンス素子Ｃ１
１，Ｃ１２からなる停電補償回路８２を並列接続したこ
とであり、その他の第１実施例と同一構成には同一符号
を付すことにより説明を省略する。ここで停電補償回路
８２は、キャパシタンス素子Ｃ１の両端電圧ＶＣ１を２
分の１倍に降圧してインバータ回路４に供給するもので
ある。そして、Ｖａ／２＞Ｖｂになる様に予め設定して
おく。The difference from the first embodiment shown in FIG. 1 is that instead of the power failure compensating circuit 81, diodes D4 to D6 and a capacitance element C1 are provided at the output terminal of the boost chopper circuit 3.
This is because the power failure compensating circuit 82 composed of C1 and C12 is connected in parallel, and the same configurations as those of the other first embodiment are denoted by the same reference numerals and the description thereof will be omitted. Here, the power failure compensation circuit 82 sets the voltage VC1 across the capacitance element C1 to 2
The voltage is reduced by a factor of 1 and supplied to the inverter circuit 4. Then, it is set in advance so that Va / 2> Vb.
【００３２】この様に構成したことにより、装置の小型
化、交流電源ＡＣの瞬時停電による放電灯の立消え防止
が可能となる。なお、キャパシタンス素子Ｃ１１，Ｃ１
２は複数のキャパシタンス素子からなるものでも良く、
停電補償回路８２は他の１／ｎ（ｎは自然数。）倍回路
でも良く、ダイオードＤ４〜Ｄ６は他のスイッチング素
子でも、整流素子でも良い。With this configuration, it is possible to reduce the size of the device and prevent the discharge lamp from extinguishing due to an instantaneous power failure of the AC power supply AC. The capacitance elements C11 and C1
2 may be composed of a plurality of capacitance elements,
The power failure compensation circuit 82 may be another 1 / n (n is a natural number) times circuit, and the diodes D4 to D6 may be other switching elements or rectifying elements.
【００３３】（実施例３）本発明に係る第３実施例の回
路図を図５に示す。(Embodiment 3) A circuit diagram of a third embodiment according to the present invention is shown in FIG.
【００３４】本回路は、インバータ回路４の制御回路１
１と、整流器２の出力電圧Ｖｆで駆動するインバータ回
路４の電源回路１２とを備える電源装置であって、整流
器２の出力端に並列接続された蓄電装置１３と、蓄電装
置１３の出力端に並列接続されると共に、抵抗Ｒ１，キ
ャパシタンス素子Ｃ２０，ツェナーダイオードＺＤ１か
らなる補助電源回路１４と、補助電源回路１４の両端に
接続されたダイオードＤ７と、キャパシタンス素子Ｃ２
０の両端に接続されたダイオードＤ８とから構成される
停電補償電源回路１５を設けたものである。This circuit is the control circuit 1 of the inverter circuit 4.
1 and a power supply circuit 12 of an inverter circuit 4 driven by the output voltage Vf of the rectifier 2, which is a power storage device 13 connected in parallel to the output end of the rectifier 2 and an output end of the power storage device 13. The auxiliary power supply circuit 14, which is connected in parallel and includes the resistor R1, the capacitance element C20, and the Zener diode ZD1, the diode D7 connected to both ends of the auxiliary power supply circuit 14, and the capacitance element C2.
A power failure compensation power supply circuit 15 including a diode D8 connected to both ends of 0 is provided.
【００３５】ここで、キャパシタンス素子Ｃ２０は抵抗
Ｒ１を介して充電されると共に、キャパシタンス素子Ｃ
２０の両端電圧ＶＣ２０は、電源回路１２の出力電圧Ｖ
１２よりも小さく、且つ制御回路１１の最低駆動電圧よ
りも大きくなる様に予め設定しておく。そして交流電源
ＡＣの瞬時停電時のみ、キャパシタンス素子Ｃ２０をダ
イオードＤ８を介して電源回路１２の電源とし、蓄電装
置１３をインバータ回路４の電源とする。Here, the capacitance element C20 is charged through the resistor R1 and at the same time the capacitance element C20 is charged.
The voltage VC20 between both ends of 20 is the output voltage V of the power supply circuit 12.
It is set so as to be smaller than 12 and larger than the minimum drive voltage of the control circuit 11. The capacitance element C20 is used as the power source for the power source circuit 12 via the diode D8 and the power storage device 13 is used as the power source for the inverter circuit 4 only when the AC power source AC is momentarily interrupted.
【００３６】この様に構成したことにより、装置の小型
化、交流電源ＡＣの瞬時停電による放電灯の立消え防止
が可能となる。なお、図６に示す様に、電源回路１２の
電源を昇圧チョッパ回路３及び蓄電装置１３とすること
で、電源回路１２はより安定した電圧を制御回路１１に
供給することができる。また、上記全ての実施例に於
て、インバータ回路４は自励式でも、他励式でも、他の
どのような回路方式でもよい。With this configuration, it is possible to reduce the size of the device and prevent the discharge lamp from extinguishing due to an instantaneous power failure of the AC power supply AC. As shown in FIG. 6, by using the booster chopper circuit 3 and the power storage device 13 as the power source of the power supply circuit 12, the power supply circuit 12 can supply a more stable voltage to the control circuit 11. Further, in all of the above-mentioned embodiments, the inverter circuit 4 may be of the self-excited type, the separately excited type, or any other circuit system.
【００３７】[0037]
【発明の効果】請求項１記載の発明によれば、交流電源
の瞬時停電による放電灯の立消え防止、小型化、低コス
ト化可能な電源装置を提供できる。According to the first aspect of the invention, it is possible to provide a power supply device capable of preventing the discharge lamp from extinguishing due to a momentary power failure of the AC power supply, downsizing, and cost reduction.
【００３８】請求項２から請求項４記載の発明によれ
ば、停電補償回路を構成するキャパシタンス素子は低耐
圧で寿命保障時間の短いものを用いることができると共
に、交流電源の瞬時停電による放電灯の立消え防止、小
型化、低コスト化可能な電源装置を提供できる。According to the second to fourth aspects of the invention, the capacitance element forming the power failure compensating circuit can be one having a low breakdown voltage and a short life guarantee time, and a discharge lamp due to an instantaneous power failure of the AC power source. It is possible to provide a power supply device capable of preventing the lamp from disappearing, downsizing, and cost reduction.
【００３９】請求項５記載の発明によれば、交流電源の
瞬時停電による、インバータ回路の動作の停止防止、放
電灯の立消え防止、小型化、低コスト化可能な電源装置
を提供できる。According to the fifth aspect of the present invention, it is possible to provide a power supply device capable of preventing the operation of the inverter circuit from being stopped due to a momentary power failure of the AC power supply, preventing the discharge lamp from extinguishing, downsizing, and reducing the cost.
【図１】本発明に係る第１実施例の回路図を示す。FIG. 1 shows a circuit diagram of a first embodiment according to the present invention.
【図２】上記実施例に係る動作波形図を示す。FIG. 2 shows an operation waveform diagram according to the above embodiment.
【図３】上記実施例に係る別の回路図を示す。FIG. 3 shows another circuit diagram according to the above embodiment.
【図４】本発明に係る第２実施例の回路図を示す。FIG. 4 shows a circuit diagram of a second embodiment according to the present invention.
【図５】本発明に係る第３実施例の回路図を示す。FIG. 5 shows a circuit diagram of a third embodiment according to the present invention.
【図６】上記実施例に係る別の回路図を示す。FIG. 6 shows another circuit diagram according to the above embodiment.
【図７】本発明に係る第１従来例の回路図を示す。FIG. 7 shows a circuit diagram of a first conventional example according to the present invention.
【図８】上記従来例に係る動作波形図を示す。FIG. 8 shows an operation waveform diagram according to the conventional example.
【図９】本発明に係る第２従来例の回路図を示す。FIG. 9 shows a circuit diagram of a second conventional example according to the present invention.
【図１０】上記従来例に係る動作波形図を示す。FIG. 10 shows an operation waveform diagram according to the conventional example.
【図１１】本発明に係る第３従来例の回路図を示す。FIG. 11 shows a circuit diagram of a third conventional example according to the present invention.
【図１２】上記従来例に係る動作波形図を示す。FIG. 12 shows an operation waveform diagram according to the conventional example.
【図１３】本発明に係る第４従来例の回路図を示す。FIG. 13 shows a circuit diagram of a fourth conventional example according to the present invention.
【図１４】本発明に係る第５従来例の回路図を示す。FIG. 14 shows a circuit diagram of a fifth conventional example according to the present invention.
【図１５】上記従来例に係る動作波形図を示す。FIG. 15 shows an operation waveform diagram according to the conventional example.
３ 直流電源 ４ インバータ回路 ８ 停電補償回路 １１ 制御回路 １２ 電源回路 １５ 停電補償電源回路 ＡＣ 交流電源 Ｃ キャパシタンス素子 ＤＢ 整流器 Ｌａ 放電灯 Ｖ 電圧 3 DC power supply 4 Inverter circuit 8 Power failure compensation circuit 11 Control circuit 12 Power supply circuit 15 Power failure compensation power supply circuit AC AC power supply C Capacitance element DB Rectifier La Discharge lamp V Voltage
Claims (5)
直流電源と、前記直流電源を交流の高周波電力に変換し
て放電灯に供給するインバータ回路とを備える電源装置
に於て、 前記交流電源の瞬時停電時に前記インバータ回路に直流
電圧を供給する停電補償回路を設けると共に、前記停電
補償回路の出力電圧は、前記直流電源電圧よりも低く、
且つ前記放電灯の安定点灯を維持する点灯維持電圧より
も高いことを特徴とする電源装置。1. A power supply device comprising: a DC power supply for rectifying and smoothing an AC power supply through a rectifier; and an inverter circuit for converting the DC power supply into AC high-frequency power and supplying the AC power to a discharge lamp. While providing a power failure compensation circuit for supplying a DC voltage to the inverter circuit at the moment of a power failure, the output voltage of the power failure compensation circuit is lower than the DC power supply voltage,
A power supply device characterized by being higher than a lighting sustaining voltage for maintaining stable lighting of the discharge lamp.
に並列接続された少なくとも１つのキャパシタンス素子
からなることを特徴とする請求項１記載の電源装置。2. The power supply apparatus according to claim 1, wherein the power failure compensation circuit includes at least one capacitance element connected in parallel to both ends of the rectifier.
に並列接続されたチョッパ回路と、前記チョッパ回路の
出力端に並列接続された少なくとも１つのキャパシタン
ス素子とからなることを特徴とする請求項１記載の電源
装置。3. The power failure compensation circuit comprises a chopper circuit connected in parallel to both ends of the rectifier, and at least one capacitance element connected in parallel to an output end of the chopper circuit. 1. The power supply device according to 1.
端に接続された少なくとも複数のキャパシタンス素子の
直列回路からなると共に、前記直流電源の出力電圧を降
圧するものであることを特徴とする請求項１記載の電源
装置。4. The power failure compensating circuit comprises a series circuit of at least a plurality of capacitance elements connected to both ends of the DC power supply, and lowers an output voltage of the DC power supply. The power supply device according to item 1.
直流電源と、前記直流電源を交流の高周波電力に変換し
て放電灯に供給するインバータ回路と、前記インバータ
回路を制御する制御回路と、前記制御回路を駆動する電
源回路とを備える電源装置に於て、 前記交流の瞬時停電時に前記制御回路に直流電圧を供給
する停電補償電源回路を設けると共に、前記停電補償電
源回路の出力電圧は、前記電源回路の出力電圧よりも低
く、且つ前記制御回路の最低駆動電圧よりも高いことを
特徴とする電源装置。5. A DC power supply for rectifying and smoothing an AC power supply via a rectifier, an inverter circuit for converting the DC power supply into AC high frequency power and supplying the same to a discharge lamp, and a control circuit for controlling the inverter circuit. In a power supply device comprising a power supply circuit for driving the control circuit, a power failure compensation power supply circuit for supplying a direct current voltage to the control circuit at the momentary power failure of the alternating current is provided, and the output voltage of the power failure compensation power supply circuit is: A power supply device which is lower than an output voltage of the power supply circuit and higher than a minimum drive voltage of the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6327355A JPH08185993A (en) | 1994-12-28 | 1994-12-28 | Power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6327355A JPH08185993A (en) | 1994-12-28 | 1994-12-28 | Power unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08185993A true JPH08185993A (en) | 1996-07-16 |
Family
ID=18198223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6327355A Withdrawn JPH08185993A (en) | 1994-12-28 | 1994-12-28 | Power unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08185993A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012211006A (en) * | 2011-03-31 | 2012-11-01 | Mitsui Eng & Shipbuild Co Ltd | Crane device |
| US9231479B2 (en) | 2012-10-12 | 2016-01-05 | Fuji Electric Co., Ltd. | Power supply device |
-
1994
- 1994-12-28 JP JP6327355A patent/JPH08185993A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012211006A (en) * | 2011-03-31 | 2012-11-01 | Mitsui Eng & Shipbuild Co Ltd | Crane device |
| US9231479B2 (en) | 2012-10-12 | 2016-01-05 | Fuji Electric Co., Ltd. | Power supply device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020305 |