JP4311213B2 - Discharge lamp lighting device - Google Patents

Discharge lamp lighting device Download PDF

Info

Publication number
JP4311213B2
JP4311213B2 JP2004021862A JP2004021862A JP4311213B2 JP 4311213 B2 JP4311213 B2 JP 4311213B2 JP 2004021862 A JP2004021862 A JP 2004021862A JP 2004021862 A JP2004021862 A JP 2004021862A JP 4311213 B2 JP4311213 B2 JP 4311213B2
Authority
JP
Japan
Prior art keywords
voltage
starting
coil
bridge circuit
discharge lamp
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
Application number
JP2004021862A
Other languages
Japanese (ja)
Other versions
JP2005216675A (en
Inventor
祐司 梶田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to JP2004021862A priority Critical patent/JP4311213B2/en
Publication of JP2005216675A publication Critical patent/JP2005216675A/en
Application granted granted Critical
Publication of JP4311213B2 publication Critical patent/JP4311213B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Description

本発明は、メタルハライドランプなど放電灯を点灯するための放電灯点灯装置、特に、始動コイルの大型化などを招くことなく始動時に高電圧を放電灯に印加することができるようにした放電灯点灯装置に関する。   The present invention relates to a discharge lamp lighting device for lighting a discharge lamp such as a metal halide lamp, and in particular, a discharge lamp lighting in which a high voltage can be applied to the discharge lamp at the start without causing an increase in the size of the start coil. Relates to the device.

従来から、直流電源をＤＣ／ＤＣコンバータで昇圧し、ＤＣ／ＤＣコンバータの直流出力をＨブリッジ回路で交流に変換して放電灯を交流点灯するよう構成された放電灯点灯装置が知られている（例えば、特許文献１及び２参照）。   2. Description of the Related Art Conventionally, there is known a discharge lamp lighting device configured to boost a direct current power source with a DC / DC converter and convert a direct current output of the DC / DC converter into alternating current with an H bridge circuit to light the discharge lamp with alternating current. (For example, refer to Patent Documents 1 and 2).

そして、この種の放電灯点灯装置は、Ｈブリッジ回路の出力側に始動コイルを設け、始動コイルの１次側コイルにＤＣ／ＤＣコンバータの直流電圧を印加することによって２次側コイルに高電圧を発生させ、この高電圧を放電灯に印加して放電灯を始動させるよう構成されている。
特開平０９−１２０８９４号公報（図１） 特開平０９−８２４８３号公報 In this type of discharge lamp lighting device, a starting coil is provided on the output side of the H bridge circuit, and the DC voltage of the DC / DC converter is applied to the primary side coil of the starting coil, whereby a high voltage is applied to the secondary side coil. And the high voltage is applied to the discharge lamp to start the discharge lamp.
Japanese Patent Laid-Open No. 09-120894 (FIG. 1) JP 09-82483 A

放電灯を始動させるためには、始動コイルの２次側コイルに出来る限り高い電圧を発生させることが望ましい。そのため、始動コイルの１次側コイルに印加するＤＣ／ＤＣコンバータの出力電圧を増大させることが考えられるが、その場合、ＤＣ／ＤＣコンバータの昇圧コイル周辺の素子の耐圧を増大させなければならなくなる。また、始動コイルの昇圧比（巻数比）を増大させることが考えられるが、その場合、始動コイルの大型化、コスト高を招くことになる。   In order to start the discharge lamp, it is desirable to generate a voltage as high as possible in the secondary coil of the starting coil. For this reason, it is conceivable to increase the output voltage of the DC / DC converter applied to the primary coil of the starting coil. In this case, however, the breakdown voltage of the elements around the booster coil of the DC / DC converter must be increased. . Further, it is conceivable to increase the step-up ratio (turn ratio) of the starting coil. In this case, however, the starting coil is increased in size and cost.

本発明は、上記のような問題点を解決し、ＤＣ／ＤＣコンバータの出力電圧を増大させず、しかも、始動コイルの昇圧比を増大させずに、始動コイルの２次側コイルに出来る限り高い電圧を発生させることにより、放電灯を確実に始動させることができる放電灯点灯装置を提供することを目的とする。   The present invention solves the above-described problems, does not increase the output voltage of the DC / DC converter, and does not increase the step-up ratio of the starting coil, and the secondary coil of the starting coil is as high as possible. It is an object of the present invention to provide a discharge lamp lighting device that can reliably start a discharge lamp by generating a voltage.

本発明の放電灯点灯装置は、直流電源を昇圧するＤＣ／ＤＣコンバータと、前記ＤＣ／ＤＣコンバータの直流出力を交流に変換して放電灯に出力するＨブリッジ回路と、始動時、前記放電灯に始動電圧を印加する始動コイルと、前記始動コイルの１次側コイルに直列接続されたスイッチ素子と、前記スイッチ素子と前記１次側コイルとの直列回路に並列接続されるとともに、正極側が前記Ｈブリッジ回路の高電圧側出力側に接続されかつ負極側が前記ＤＣ/ＤＣコンバータのＧＮＤ側出力側に接続された始動用コンデンサと、前記Ｈブリッジ回路の高電圧側出力と低電圧側出力との間に接続された倍圧用コンデンサとを備え、前記Ｈブリッジ回路の一対のスイッチ素子がオンしたとき、前記Ｈブリッジ回路の高電圧側出力が高レベル、低電圧側出力が低レベルとなり、前記始動用コンデンサ及び前記倍圧用コンデンサが充電され、その後、前記Ｈブリッジ回路の他の一対のスイッチ素子がオンしたとき、前記Ｈブリッジ回路の高電圧側出力が低レベル、低電圧側出力が高レベルにそれぞれ反転し、前記ＤＣ/ＤＣコンバータの出力電圧と前記倍圧用コンデンサの端子電圧とが重畳された電圧が前記充電されている始動用コンデンサに印加されるよう構成されることを特徴とする。
本発明によると、ＤＣ/ＤＣコンバータの出力電圧を増大させず、しかも、始動コイルの昇圧比を増大させずに、始動コイルの２次側に出来る限り高い電圧を発生させることができる。 The discharge lamp lighting device of the present invention includes a DC / DC converter that boosts a DC power supply, an H-bridge circuit that converts a DC output of the DC / DC converter into AC and outputs the AC to the discharge lamp, and the discharge lamp at the start A starting coil for applying a starting voltage, a switching element connected in series to a primary side coil of the starting coil, a series circuit of the switching element and the primary coil, and a positive side on the positive side A starting capacitor connected to a high voltage side output side of the H bridge circuit and having a negative electrode side connected to a GND side output side of the DC / DC converter; and a high voltage side output and a low voltage side output of the H bridge circuit And when the pair of switching elements of the H bridge circuit is turned on, the high voltage side output of the H bridge circuit is at a high level and the low voltage side. When the output becomes low level, the starting capacitor and the voltage doubler capacitor are charged, and then the other pair of switch elements of the H bridge circuit is turned on, the high voltage side output of the H bridge circuit is low level, The low voltage side output is inverted to a high level, respectively, and a voltage in which the output voltage of the DC / DC converter and the terminal voltage of the voltage doubler capacitor are superimposed is applied to the charged starting capacitor. It is characterized by that.
According to the present invention, the highest possible voltage can be generated on the secondary side of the starting coil without increasing the output voltage of the DC / DC converter and without increasing the step-up ratio of the starting coil.

前記始動コイルの昇圧比は、２３０／３以下であり、始動コイルは比較的小型である。   The step-up ratio of the starting coil is 230/3 or less, and the starting coil is relatively small.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の一実施形態に係る放電灯点灯装置の回路図、図２は、回路の動作説明図をそれぞれ示す。   FIG. 1 is a circuit diagram of a discharge lamp lighting device according to an embodiment of the present invention, and FIG. 2 is an operation explanatory diagram of the circuit.

図１において、直流電源の＋Ｂ端子とＧＮＤ端子にＤＣ／ＤＣコンバータ１が接続されており、直流電源の出力電圧はＤＣ／ＤＣコンバータ１によって昇圧される。   In FIG. 1, a DC / DC converter 1 is connected to a + B terminal and a GND terminal of a DC power supply, and an output voltage of the DC power supply is boosted by the DC / DC converter 1.

ＤＣ／ＤＣコンバータ１の出力側には、４つのスイッチ素子２Ａ，２Ｂ，２Ｃ，２Ｄ（例えば、ＭＯＳ形ＦＥＴ）からなるＨブリッジ回路２が接続されており、ＤＣ／ＤＣコンバータ１の直流出力はＨブリッジ回路２のスイッチ素子２Ａ，２Ｂ，２Ｃ，２Ｄのスイッチング動作により交流に変換される。Ｈブリッジ回路２の高電圧側出力端子Ｈｉ、低電圧側出力端子Ｌｏには、図示しない放電灯（バルブ）が接続され、放電灯は、Ｈブリッジ回路２の出力により交流点灯される。   Connected to the output side of the DC / DC converter 1 is an H-bridge circuit 2 composed of four switch elements 2A, 2B, 2C, 2D (for example, a MOS FET), and the DC output of the DC / DC converter 1 is The switching elements 2A, 2B, 2C, and 2D of the H bridge circuit 2 are converted to alternating current. A discharge lamp (bulb) (not shown) is connected to the high-voltage side output terminal Hi and the low-voltage side output terminal Lo of the H-bridge circuit 2, and the discharge lamp is lit in an alternating current by the output of the H-bridge circuit 2.

Ｈブリッジ回路２の高電圧側出力（図示Ａ点）には、始動コイル３の２次側コイル３ｂが接続されており、始動コイル３は、放電灯に始動電圧を印加して放電灯を始動させる。始動コイル３の１次側コイル３ａに、スイッチ素子４（例えば、サイリスタ）が直列接続されており、スイッチ素子４がオンしたとき１次側コイル３ａは通電する。１次側コイル３ａの巻数は３ターン、２次側コイル３ｂの巻数は２１５ターンであり、始動コイル３の巻数比（昇圧比）は、２３０／３以下と、従来の１次側３ターン、２次側２３５ターンと比べて小さい。１次側コイル３ａとスイッチ素子４の直列回路に、始動用コンデンサ５が並列接続されており、スイッチ素子４がオンしたとき、始動用コンデンサ５は放電し、１次側コイル３ａに大きな電流が流れ、２次側コイル３ｂに高電圧を発生させる。始動用コンデンサ５の正極側は、倍圧整流回路６を介してＨブリッジ回路２の高電圧側出力（Ａ点）に接続されており、一方、負極側は、ＤＣ／ＤＣコンバータ１のＧＮＤ側出力（図示Ｄ点）に接続されている。   The secondary side coil 3b of the starting coil 3 is connected to the high voltage side output (point A in the figure) of the H bridge circuit 2, and the starting coil 3 applies the starting voltage to the discharge lamp to start the discharge lamp. Let A switch element 4 (for example, a thyristor) is connected in series to the primary coil 3a of the starting coil 3, and when the switch element 4 is turned on, the primary coil 3a is energized. The number of turns of the primary coil 3a is 3 turns, the number of turns of the secondary coil 3b is 215 turns, and the turn ratio (step-up ratio) of the starting coil 3 is 230/3 or less, the conventional primary side 3 turns, Small compared to 235 turns on the secondary side. A starting capacitor 5 is connected in parallel to the series circuit of the primary coil 3a and the switch element 4, and when the switch element 4 is turned on, the starting capacitor 5 is discharged, and a large current flows in the primary coil 3a. A high voltage is generated in the secondary coil 3b. The positive side of the starting capacitor 5 is connected to the high voltage side output (point A) of the H bridge circuit 2 via the voltage doubler rectifier circuit 6, while the negative side is the GND side of the DC / DC converter 1. It is connected to the output (D point in the figure).

Ｈブリッジ回路２の高電圧側出力（Ａ点）と低電圧側出力（図示Ｂ点）に倍圧整流回路６が接続されており、倍圧整流回路６は、整流ダイオード７及び倍圧用コンデンサ８を備える。整流ダイオード７は、Ｈブリッジ回路２の高電圧側出力（Ａ点）に接続されている。倍圧用コンデンサ８の正極側は、他のダイオード９を介して始動用コンデンサ５の正極側に接続されている。倍圧用コンデンサ８の正極側とＤＣ／ＤＣコンバータ１の高電圧側出力（図示Ｃ点）に、ツェナーダイオード１０が接続されている。   A voltage doubler rectifier circuit 6 is connected to a high voltage side output (point A) and a low voltage side output (point B in the figure) of the H-bridge circuit 2, and the voltage doubler rectifier circuit 6 includes a rectifier diode 7 and a voltage doubler capacitor 8. Is provided. The rectifier diode 7 is connected to the high voltage side output (point A) of the H bridge circuit 2. The positive electrode side of the voltage doubler capacitor 8 is connected to the positive electrode side of the starting capacitor 5 via another diode 9. A Zener diode 10 is connected to the positive side of the voltage doubler capacitor 8 and the high voltage side output (point C in the figure) of the DC / DC converter 1.

制御回路１１は、ランプ電流、ランプ電圧などを検出信号として入力し、ＤＣ／ＤＣコンバータ１、Ｈブリッジ回路２及びスイッチ素子４に対し所定のタイミングで制御信号を出力する。   The control circuit 11 inputs a lamp current, a lamp voltage, and the like as detection signals, and outputs a control signal to the DC / DC converter 1, the H bridge circuit 2, and the switch element 4 at a predetermined timing.

次に、上記のように構成された回路の動作を図２に基づいて説明する。   Next, the operation of the circuit configured as described above will be described with reference to FIG.

直流電源（＋Ｂ）がオンした時点から約４ｍｓのリセット期間が経過すると、ＤＣ／ＤＣコンバータ１は動作を開始し、ＤＣ／ＤＣコンバータ１の出力電圧（Ｃ点、Ｄ点間の電圧）は約４００Ｖとなる。電源オンから約１０ｍｓが経過すると、それまで全てオフしていたＨブリッジ回路２の４つのスイッチ素子２Ａ，２Ｂ，２Ｃ，２Ｄのうち２つのスイッチ素子２Ａ，２Ｂがオンし、Ｈブリッジ回路２の高電圧側出力（Ａ点）の電位は４００Ｖ、低電圧側出力（Ｂ点）の電位は０Ｖとなる。このとき、Ａ点から整流ダイオード７、抵抗１２、ダイオード９を通して始動用コンデンサ５が充電されるとともに、整流ダイオード７、抵抗１２、抵抗１３を通して倍圧用コンデンサ８が充電され、電源オンから約１６ｍｓが経過したときには、図示Ｅ点及び図示Ｆ点の電位はともに約４００Ｖである。   When a reset period of about 4 ms elapses after the DC power supply (+ B) is turned on, the DC / DC converter 1 starts to operate, and the output voltage of the DC / DC converter 1 (the voltage between the points C and D) is about 400V. When about 10 ms elapses after the power is turned on, two switch elements 2A, 2B among the four switch elements 2A, 2B, 2C, 2D of the H bridge circuit 2 that have been turned off until then are turned on. The potential of the high voltage side output (point A) is 400V, and the potential of the low voltage side output (point B) is 0V. At this time, the starting capacitor 5 is charged from the point A through the rectifier diode 7, the resistor 12, and the diode 9, and the voltage doubler capacitor 8 is charged through the rectifier diode 7, the resistor 12, and the resistor 13, and about 16 ms has elapsed since the power was turned on. When the time has elapsed, the potentials at the point E and the point F in the figure are both about 400V.

電源オンから約１６ｍｓが経過した時点で、Ｈブリッジ回路２のスイッチ素子２Ａ，２Ｂはオフへスイッチングし、かつ、他のスイッチ素子２Ｃ，２Ｄはオンへスイッチングする。このスイッチング動作によりＡ点は０Ｖ、Ｂ点は４００Ｖになる。倍圧用コンデンサ８の両端には４００Ｖの電圧がある状態でＢ点が０Ｖから４００Ｖに上昇するため、Ｅ点は一瞬にして８００Ｖに向かって上昇し、既に４００Ｖに充電されている始動用コンデンサ５は、抵抗１３、ダイオード９を通してさらに充電開始される。仮に、倍圧用コンデンサ８（Ｃ＝０．３３μＦ）に蓄えられたエネルギーがすべて始動用コンデンサ５（Ｃ＝０．４７μＦ）に移ったとすると、Ｆ点は７３５Ｖになるが、実際には倍圧用コンデンサ８に残る分もあるため、Ｆ点は５００Ｖ程度になる。   When about 16 ms elapses after the power is turned on, the switch elements 2A and 2B of the H-bridge circuit 2 are switched off, and the other switch elements 2C and 2D are switched on. By this switching operation, the point A becomes 0V and the point B becomes 400V. Since the point B rises from 0V to 400V with a voltage of 400V at both ends of the voltage doubler capacitor 8, the point E rises instantaneously toward 800V and is already charged to 400V. Is further charged through the resistor 13 and the diode 9. If all the energy stored in the voltage doubler capacitor 8 (C = 0.33 μF) is transferred to the starting capacitor 5 (C = 0.47 μF), the F point becomes 735 V, but in reality the voltage doubler capacitor Since there is a part remaining in 8, the F point becomes about 500V.

さらに、電源オンから約２２ｍｓが経過した時点で、再びＨブリッジ回路２が反転しＡ点が４００Ｖ、Ｂ点が０Ｖになると、倍圧用コンデンサ８には４００Ｖが充電される。さらに、電源オンから約２８ｍｓが経過した時点で、Ｈブリッジ回路２が反転しＡ点が０Ｖ、Ｂ点が４００Ｖになると、Ｅ点は一瞬にして８００Ｖに向かって上昇し、既に約５００Ｖに充電されている始動用コンデンサ５はさらに充電開始されるが、今回のＨブリッジ回路２の反転時点から約４００μＳが経過した時点でスイッチ素子（サイリスタ）４がオンするようになるため、始動用コンデンサ５に貯まった電荷は始動コイル３の１次側コイル３ａを通して放電し、２次側コイル３ｂに約２２ｋＶの高電圧が発生し、放電灯の電極間がブレークダウンして放電灯は点灯開始つまり始動する。この放電時点の始動用コンデンサ５の電圧は約５２０Ｖである。なお、ツェナーダイオード１０は、８００Ｖに向かって上昇しようとするＥ点の電位を制限する作用を果たす。   Further, when about 22 ms elapses after the power is turned on, the H-bridge circuit 2 is reversed again, and when the point A becomes 400V and the point B becomes 0V, the voltage doubler capacitor 8 is charged with 400V. Furthermore, when about 28 ms has passed since the power was turned on, when the H bridge circuit 2 is reversed and the point A becomes 0V and the point B becomes 400V, the point E rises to 800V instantly and is already charged to about 500V. The starting capacitor 5 that has been started is further charged, but the switching element (thyristor) 4 is turned on when about 400 μS has elapsed since the inversion of the H-bridge circuit 2 this time. The electric charge stored in is discharged through the primary coil 3a of the starting coil 3, a high voltage of about 22 kV is generated in the secondary coil 3b, the breakdown between the electrodes of the discharge lamp is broken down, and the discharge lamp starts to light up, that is, starts. To do. The voltage of the starting capacitor 5 at the time of discharging is about 520V. The Zener diode 10 serves to limit the potential at the point E that tends to increase toward 800V.

以上説明したように、本実施形態の放電灯点灯装置は、始動コイル３の１次側に倍圧整流回路６により得た電圧を印加するようにした。このように倍圧整流回路６を用いて始動コイル３の１次側の電圧を増大するようにしたため、ＤＣ／ＤＣコンバータ１の出力電圧を増大させず、しかも、始動コイル３の昇圧比を増大させずに、始動コイル３の２次側に出来る限り高い電圧を発生させることができる。   As described above, the discharge lamp lighting device of the present embodiment applies the voltage obtained by the voltage doubler rectifier circuit 6 to the primary side of the starting coil 3. Since the voltage on the primary side of the starting coil 3 is increased using the voltage doubler rectifier circuit 6 in this way, the output voltage of the DC / DC converter 1 is not increased, and the step-up ratio of the starting coil 3 is increased. Without doing so, a voltage as high as possible can be generated on the secondary side of the starting coil 3.

始動コイル３の昇圧比は、２３０／３以下であり、始動コイル３は比較的小型である。   The step-up ratio of the starting coil 3 is 230/3 or less, and the starting coil 3 is relatively small.

また、本実施形態の放電灯点灯装置は、直流電源を昇圧するＤＣ／ＤＣコンバータ１と、ＤＣ／ＤＣコンバータ１の直流出力を交流に変換して放電灯に出力するＨブリッジ回路２と、始動時、放電灯に始動電圧を印加する始動コイル３と、始動コイル３の１次側コイル３ａに直列接続されたスイッチ素子４と、スイッチ素子４と１次側コイル３ａとの直列回路に並列接続された始動用コンデンサ５と、Ｈブリッジ回路２のスイッチング動作に基づき、ＤＣ／ＤＣコンバータ１の出力電圧よりも高い電圧を始動用コンデンサ５に印加する倍圧整流回路６とを備える。始動時、倍圧整流回路６により始動用コンデンサ５にはＤＣ／ＤＣコンバータ１の出力電圧よりも高い電圧が印加されており、スイッチ素子４がオンすると、始動用コンデンサ５は瞬時に放電して１次側コイル３ａに大きな電流が流れ、２次側コイル３ｂに高電圧が発生し、放電灯は始動するようになる。したがって、ＤＣ／ＤＣコンバータ１の出力電圧を増大させず、しかも、始動コイル３の昇圧比を増大させずに、始動コイル３の２次側に出来る限り高い電圧を発生させることができる。   Further, the discharge lamp lighting device of the present embodiment includes a DC / DC converter 1 that boosts a DC power supply, an H bridge circuit 2 that converts a DC output of the DC / DC converter 1 into an AC and outputs the AC to a discharge lamp, and a start In parallel, a starting coil 3 for applying a starting voltage to the discharge lamp, a switching element 4 connected in series to the primary coil 3a of the starting coil 3, and a series circuit of the switching element 4 and the primary coil 3a are connected in parallel. And a voltage doubler rectifier circuit 6 for applying a voltage higher than the output voltage of the DC / DC converter 1 to the starting capacitor 5 based on the switching operation of the H-bridge circuit 2. At the time of starting, a voltage higher than the output voltage of the DC / DC converter 1 is applied to the starting capacitor 5 by the voltage doubler rectifier circuit 6, and when the switching element 4 is turned on, the starting capacitor 5 is instantaneously discharged. A large current flows through the primary coil 3a, a high voltage is generated in the secondary coil 3b, and the discharge lamp starts. Therefore, the highest possible voltage can be generated on the secondary side of the starting coil 3 without increasing the output voltage of the DC / DC converter 1 and without increasing the step-up ratio of the starting coil 3.

本発明の一実施形態に係る放電灯点灯装置の回路図である。It is a circuit diagram of the discharge lamp lighting device concerning one embodiment of the present invention. 回路の動作説明図である。It is operation | movement explanatory drawing of a circuit.

符号の説明Explanation of symbols

１ ＤＣ／ＤＣコンバータ
２ Ｈブリッジ回路
３ 始動コイル
３ａ １次側コイル
３ｂ ２次側コイル
４ スイッチ素子
５ 始動用コンデンサ
６ 倍圧整流回路
８ 倍圧用コンデンサ DESCRIPTION OF SYMBOLS 1 DC / DC converter 2 H bridge circuit 3 Starting coil 3a Primary side coil 3b Secondary side coil 4 Switch element 5 Starting capacitor 6 Double voltage rectifier circuit 8 Double voltage capacitor

Claims (2)

直流電源を昇圧するＤＣ／ＤＣコンバータと、
前記ＤＣ／ＤＣコンバータの直流出力を交流に変換して放電灯に出力するＨブリッジ回路と、
始動時、前記放電灯に始動電圧を印加する始動コイルと、
前記始動コイルの１次側コイルに直列接続されたスイッチ素子と、
前記スイッチ素子と前記１次側コイルとの直列回路に並列接続されるとともに、正極側が前記Ｈブリッジ回路の高電圧側出力側に接続されかつ負極側が前記ＤＣ/ＤＣコンバータのＧＮＤ側出力側に接続された始動用コンデンサと、
前記Ｈブリッジ回路の高電圧側出力と低電圧側出力との間に接続された倍圧用コンデンサと
を備え、
前記Ｈブリッジ回路の一対のスイッチ素子がオンしたとき、前記Ｈブリッジ回路の高電圧側出力が高レベル、低電圧側出力が低レベルとなり、前記始動用コンデンサ及び前記倍圧用コンデンサが充電され、
その後、前記Ｈブリッジ回路の他の一対のスイッチ素子がオンしたとき、前記Ｈブリッジ回路の高電圧側出力が低レベル、低電圧側出力が高レベルにそれぞれ反転し、前記ＤＣ/ＤＣコンバータの出力電圧と前記倍圧用コンデンサの端子電圧とが重畳された電圧が前記充電されている始動用コンデンサに印加される
よう構成されることを特徴とする放電灯点灯装置。 A DC / DC converter that boosts a DC power supply;
An H-bridge circuit for converting the direct current output of the DC / DC converter into alternating current and outputting it to a discharge lamp;
A starting coil for applying a starting voltage to the discharge lamp at the time of starting;
A switch element connected in series to the primary coil of the starting coil;
The switching element and the primary side coil are connected in parallel to each other, and the positive side is connected to the high voltage side output side of the H bridge circuit and the negative side is connected to the GND side output side of the DC / DC converter. A starting capacitor,
A voltage doubler capacitor connected between the high voltage side output and the low voltage side output of the H-bridge circuit;
With
When the pair of switch elements of the H bridge circuit is turned on, the high voltage side output of the H bridge circuit is high level, the low voltage side output is low level, and the starting capacitor and the voltage doubler capacitor are charged,
Thereafter, when the other pair of switch elements of the H bridge circuit are turned on, the high voltage side output of the H bridge circuit is inverted to a low level and the low voltage side output is inverted to a high level, respectively, and the output of the DC / DC converter A voltage obtained by superimposing a voltage and a terminal voltage of the voltage doubler capacitor is applied to the charged starting capacitor.
A discharge lamp lighting device configured as described above . 前記始動コイルの昇圧比は、２３０／３以下であることを特徴とする請求項１記載の放電灯点灯装置。   The discharge lamp lighting device according to claim 1, wherein a boosting ratio of the starting coil is 230/3 or less.
JP2004021862A 2004-01-29 2004-01-29 Discharge lamp lighting device Expired - Fee Related JP4311213B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004021862A JP4311213B2 (en) 2004-01-29 2004-01-29 Discharge lamp lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004021862A JP4311213B2 (en) 2004-01-29 2004-01-29 Discharge lamp lighting device

Publications (2)

Publication Number Publication Date
JP2005216675A JP2005216675A (en) 2005-08-11
JP4311213B2 true JP4311213B2 (en) 2009-08-12

Family

ID=34905366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004021862A Expired - Fee Related JP4311213B2 (en) 2004-01-29 2004-01-29 Discharge lamp lighting device

Country Status (1)

Country Link
JP (1) JP4311213B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2896121B1 (en) * 2006-01-05 2011-07-15 Valeo Vision GAS DISCHARGE LAMP BALLAST AND METHOD FOR CONTROLLING THIS BALLAST

Also Published As

Publication number Publication date
JP2005216675A (en) 2005-08-11

Similar Documents

Publication Publication Date Title
JP2006196304A (en) Discharge lamp lighting device
JP2909867B2 (en) Lighting circuit for vehicle discharge lamps
JP5193469B2 (en) Ballast for gas discharge lamp and control method thereof
EP2434845A2 (en) Discharge lamp lighting circuit
JP2001203087A (en) Lighting circuit of discharge lamp
JP4311213B2 (en) Discharge lamp lighting device
JP4133086B2 (en) Static eliminator
JP4836587B2 (en) High pressure discharge lamp lighting device
JP4744309B2 (en) Discharge lamp lighting device
JP2006228676A (en) Discharge lamp lighting device
JP5580677B2 (en) Discharge lamp lighting circuit
JP3743200B2 (en) Discharge lamp lighting device
JP2013110002A (en) Discharge lamp lighting device and vehicle head light unit using the same
JP2000243584A (en) Discharge lamp lighting device
JP4513048B2 (en) Discharge lamp equipment
KR100452586B1 (en) High voltage ignitor for lamp spark
JP2005209410A (en) Discharge lamp lighting device
JP2000306688A (en) High-pressure discharge lamp lighting device
JP2005203185A (en) High-pressure discharge lamp lighting device
JP2006203996A (en) Dc-dc converter
JP4343362B2 (en) Igniter circuit for discharge lamp
KR200284077Y1 (en) High voltage ignitor for lamp spark
JP2007149473A (en) Discharge lamp starter, discharge lamp lighting device, and illumination device
JP2008135363A (en) Discharge lamp lighting apparatus
JP2001006894A (en) High-pressure discharge lamp device for automobile

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060307

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080822

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080902

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20081024

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090421

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090504

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120522

Year of fee payment: 3

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120522

Year of fee payment: 3

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130522

Year of fee payment: 4

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140522

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees