JP2006319172A - Adapter device for light control of led lamp - Google Patents

Adapter device for light control of led lamp Download PDF

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JP2006319172A
JP2006319172A JP2005140979A JP2005140979A JP2006319172A JP 2006319172 A JP2006319172 A JP 2006319172A JP 2005140979 A JP2005140979 A JP 2005140979A JP 2005140979 A JP2005140979 A JP 2005140979A JP 2006319172 A JP2006319172 A JP 2006319172A
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current
led lamp
voltage
rectifier
lamp load
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Ryuichi Hayashi
隆一 林
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Wako Denken Kk
和光電研株式会社
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<P>PROBLEM TO BE SOLVED: To control lighting intensity of the load of LED lamps, by using a lighting controller for incandescence lamps. <P>SOLUTION: Between a phase control-type lighting controller 1 and a LED lamp load 2, a current maintenance means 10 is arranged in parallel so that the current may be made to flow on the basis of the voltage outputted to the current maintenance means 10 from the lighting controller 1. In this way, it can be made possible to control lighting intensity by the controller 1, by making the current maintenance means 10 obtain the maintenance current of the element of the lighting controller 1 in the vicinity of the forward direction of LED voltage, or by enabling to prevent an ignition mistake of the element. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、白熱ランプ負荷用の照明コントローラをLEDランプ負荷に適用できるようにするためのLEDランプ調光用アダプタ装置に関するものである。 The present invention relates to an LED lamp dimming adapter device so that the lighting controller for incandescent lamp load can be applied to the LED lamp load.

近年、LED(発光ダイオード)は、光出力、発光効率、演色性、コストなどの問題を解決して、照明としても用いることができるようになっている。 Recently, LED (light emitting diode), the light output, emission efficiency, color rendering, to resolve the problem of cost, so that it is possible to use as illumination.

そのため、例えば、調光用のハロゲンランプなどの白熱ランプの代わりとしても使用することが試みられている。 Therefore, for example, it has been attempted also be used as a replacement for an incandescent lamp such as a halogen lamp for dimming.

通常、このようなハロゲンランプの調光には、位相制御による照明コントローラが多く使用されているが、この照明コントローラでLEDランプ負荷が調光できれば既設の設備がそのまま使えるので非常に好都合である。 Usually, the dimming of such a halogen lamp, but the lighting controller is often used by the phase control is very advantageous because existing equipment can be used as if light LED lamp load adjusted by the lighting controller.

ところが、LEDは、図6のようなダイオード特性を呈し、印加電圧の低いうちは電流を殆んど流さないが、ある電圧(順方向電圧VF)付近から急に電流を流し始める。 However, LED exhibits diode characteristics as shown in FIG. 6, among low applied voltages is not flowed almost the current begins to flow suddenly current from a certain voltage (forward voltage VF) around. このように、電圧の増加に対して電流の増加が著しいため、どうしても定電流ドライブをしなければならないという問題があった。 Thus, because the increase in current is significant relative increase in voltage, there is a problem that must be the absolutely constant current drive.

そのため、このような照明コントローラを使用する試みとして、例えば、図5に示す(特許文献1)に記載されたLED点灯装置がある。 Therefore, an attempt to use such a lighting controller, for example, a LED lighting device described in FIG. 5 (Patent Document 1).

このLED点灯装置は、照明コントローラ(調光器)1とLEDランプ負荷2との間に、整流器3とチョッパ回路4を設けるとともに、整流器3の出力と並列に電圧検出抵抗5を設けて整流器3からの出力電圧を検出する。 The LED lighting device includes, between the lighting controller (dimmer) 1 and the LED lamp load 2, a rectifier 3 and provided with a chopper circuit 4, a rectifier 3 of the voltage detecting resistor 5 disposed in parallel to the output rectifier 3 detecting an output voltage from. また一方、LEDランプ負荷2と直列に電流検出手段6を設けて負荷電流I を検出し、その検出した負荷電流I に基づく電圧と前記検出した出力電圧とを比較して両者の誤差が無くなるようにチョッパ回路4を駆動するというものである。 On the other hand, LED lamp load 2 in series with by providing a current detector 6 detects the load current I L, the error of both by comparing the output voltage the detected voltage based on the load current I L that the detected is that for driving the chopper circuit 4 as eliminated. そして、LEDランプ負荷2を定電流駆動すると同時に、比較出力と前記電圧出力とを乗算回路などを介して加えることにより、調整電圧に対して電流の増加の著しいLEDランプ負荷2の照度調整を白熱ランプ負荷と同じようにできるようにしたものである。 Then, at the same time the LED lamp load 2 to a constant current driving, by adding via a multiplying circuit and said voltage output and comparator output, incandescent significant illuminance adjustment of the LED lamp load 2 increase in current for a regulated voltage it is obtained by allowing the same as the lamp load.
特開2004−327152号公報 JP 2004-327152 JP

しかしながら、上記のLED点灯装置では、LED負荷と直列に電流検出手段を設けて負荷電流を検出しているので、負荷の数が多くなると前記検出手段による損失が大きくなる。 However, in the above LED lighting device, since the LED load and the series provided with current detecting means detects the load current, losses due to the detection means and the number of loads increases increases. そのため、白熱ランプ負荷に比べて消費電力の少ないLED負荷の特長を生かせない問題がある。 Therefore, there is a problem that Ikase fewer features of the LED load power consumption than incandescent lamp load.

そのため、例えば、十分に許容損出の大きな素子(トライアック、サイリスタなど)を備えた位相制御回路で直接LEDを駆動したとしても照度のコントロールが上手くできない問題がある。 Therefore, for example, there is a problem that control of the illumination is not well even when driven directly LED in the phase control circuit with a large element of sufficiently acceptable loss out (triac, thyristor).

すなわち、LEDは順方向電圧から急激に電流が流れ始める特性なので、その流れ始めの電流の少ない辺りで、前記素子の保持電流が得られなかったり、前記素子が点弧ミスを起こしてしまったりして上手く調整できない。 That, LED is so characteristic that starts to flow the current rapidly from the forward voltage, a small neighborhood of its flow beginning of the current, or the holding current is not obtained in the elements, the element is or worse cause restriking mistakes It can not be well adjusted Te.

そこで、この発明の課題は、位相制御による照明コントローラを用いてLEDの照度コントロールができるようにすることである。 Accordingly, an object of the present invention is to allow LED illumination control using a lighting controller according to the phase control. また、その際、大きな電流損出を生じないようにすることである。 At that time, it is possible to prevent the occurrence of large-current loss and out.

上記の課題を解決するため、この発明では、位相制御式の照明コントローラとLEDランプ負荷との間に、電流保持手段を並列に設け、整流器から出力される電圧に基づいて整流器からの電流を流すという構成を採用したのである。 To solve the above problems, in this invention, between the lighting controller and the LED lamp load in phase control, provided current holding means in parallel, a current flows from the rectifier based on the voltage output from the rectifier it was adopted a configuration that.

このような構成を採用したことにより、電流保持手段がLEDの順方向電圧辺りで照明コントローラの素子の保持電流が得られるように電流を流したり、前記素子の点弧ミスを防止できるように電流を流して、前記コントローラの調整範囲が得られるようにようにする。 By adopting such a configuration, or electric current as the holding current of the device of the lighting controller current retaining means in forward voltage Atari LED is obtained, the current to be prevented from firing misses the point of the device the flowing, so as to adjust the range of the controller is obtained.

また、このとき、上記電流保持手段とLEDランプ負荷との間に共振トランスを用いた自励式のDC−DCコンバータと整流回路を設けた構成を採用することができる。 At this time, it is possible to adopt a structure in which a self-excited DC-DC converter and rectifier circuit using a resonant transformer between the current holding means and LED lamp load.

このような構成を採用することにより、例えば、LEDランプ負荷は、DC−DCコンパータのトランスを介して電流駆動することになり、照度調整の際の応答を早くすることができる。 By adopting such a configuration, for example, LED lamp load, will be current driven through the transformer of the DC-DC Konpata, it is possible to quickly respond upon illumination adjustment. また、DC−DCコンバータの出力は周波数が高く、例えば整流回路の時定数が小さくても出力リップルを小さくできるので、点灯時のチラツキを少なくできる。 Further, DC-DC converter output has a high frequency, for example because even if the time constant of the rectifier circuit is low can be reduced output ripple can be reduced flickering during lighting.

この発明は、以上のように構成したことにより、位相制御による照明コントローラを用いてLEDランプ負荷の照度コントロールができる。 This invention, by the structure described above, it is the illumination control of the LED lamp load with lighting controller according to the phase control. そのため、LEDランプ負荷の調光を、既設の設備をそのまま使って簡単に低コストで行えるので好都合である。 Therefore, the dimming of the LED lamp load, it is advantageous because allows a simple low cost uses exactly the existing facilities.

以下、この発明の最良の実施の形態を図面に基づいて説明する。 It will be described below with reference to the preferred embodiment of the invention with reference to the drawings.

この形態のLEDランプ調光用アダプタ装置は、図1に示すように、整流器3と電流保持手段10とで構成され、位相制御式の白熱ランプ負荷用の照明コントローラ1とLEDランプ負荷2との間に設けられる。 This form of LED lamp dimming adapter apparatus, as shown in FIG. 1, is composed of a rectifier 3 and the current holding means 10, the lighting controller 1 and the LED lamp load 2 for incandescent lamp load of phase control It is provided between.

整流器3は、この形態では、全波整流用のブリッジ回路を使用している。 Rectifier 3, in this embodiment uses a bridge circuit for full-wave rectification. これ以外に整流器3には、ダイオードを使用した半波整流を用いることもできるが、効率が落ちてチラツキが増すので、全波整流を用いるのが好ましい。 This rectifier 3 in addition, can also be used a half-wave rectified using the diode, since the efficiency falls flicker increases, to use a full-wave rectification is preferred.

電流保持手段10は、定電流回路11と電圧検出回路12とで構成されている。 Current holding means 10, and a constant current circuit 11 and the voltage detection circuit 12. 定電流回路11は、NPNトランジスタT1とエミッタ抵抗Re及びツェナーダイオードD1とで構成されており、図1のように、ツェナーダイオードD1のカソード端子をトランジスタT1のベースと接続することにより、 Constant current circuit 11 is constituted by an NPN transistor T1 and the emitter resistor Re and the Zener diode D1, as shown in FIG. 1, by connecting the cathode terminal of the Zener diode D1 and the base of the transistor T1,
Ie=Vz−Veb/Re Ie = Vz-Veb / Re
Ie:エミッタ電流 Vz:ツェナー電圧で示す電流を流すようになっている。 Ie: emitter current Vz: adapted current flow indicated by the Zener voltage. そのため、ここでは前記電流Ieを照明コントローラ1がオン状態を維持する最少の電流(例えば、コントローラ1のトリガされた位相制御素子のトライアックの保持電流I )を流すようにVz、Reの値を設定する。 Therefore, minimal current where the lighting controller 1 of the current Ie is kept on (e.g., triac holding current I H of the trigger phase control element of the controller 1) to flow a Vz, the value of Re set to.

電圧検出回路12は、NPNトランジスタT2と分圧抵抗13及びツェナーダイオードD2とで構成したもので、前記トランジスタT2のコレクタ端子を定電流回路11のトランジスタT1のベース端子と接続して、トランジスタT2がオンするとトランジスタT1をオフできるようにしてある。 Voltage detecting circuit 12, which was constituted by an NPN transistor T2 and minutes resistors 13 and zener diode D2, the collector terminal of the transistor T2 connected to the base terminal of the transistor T1 of the constant current circuit 11, the transistor T2 is When turned on it is also available off the transistor T1.

また、分圧抵抗13は、抵抗R1と抵抗R2とを直列に接続した直列回路からなり、整流器3の出力と並列に接続する。 Further, the voltage dividing resistors 13 becomes a resistor R1 and the resistor R2 a series circuit connected in series, connected in parallel with the output of the rectifier 3.

ツェナーダイオードD2は、コンパレート用に設けたもので、図1のように、アノード端子をトランジスタT2のベースに接続し、カソード端子を分圧抵抗R1とR2の接続点と接続することにより、前記抵抗R1とR2とで分圧された電圧がツェナーダイオードのツェナー電圧を超えると、トランジスタT2のベースへ電流が流れてトランジスタT2をオンすることができるようにしてある。 Zener diode D2, which was provided for the comparator, as shown in FIG. 1, by connecting the anode terminal to the base of transistor T2, to connect the cathode terminal voltage dividing resistors R1 and a connection point of R2, the If resistors R1 and R2 and the de-divided voltage exceeds the Zener voltage of the Zener diode, are to be able to turn on the transistor T2 current flows to the base of transistor T2. ここでは、前記ツェナーダイオードD2がオンする電圧を、LEDランプ負荷2が点灯して充分に前記素子の保持電流I を流せる電圧に設定してある。 Here, a voltage the zener diode D2 is turned on, LED lamp load 2 is set to a voltage that can safely hold current I H of sufficiently the device on.

なお、図1中のコンデンサC1は、ノイズ低減用に設けたものである。 The capacitor C1 in FIG. 1 was provided for noise reduction.

この形態は、上記のように構成されており、上記アダプタ装置は、図1で示したように位相制御式の照明コントローラ(白熱ランプ負荷用)1とLEDランプ負荷2の間に設けて使用する。 This embodiment is constructed as described above, the adapter device uses provided between the lighting controller (incandescent lamp load) 1 and LED lamp load 2 of phase control as shown in FIG. 1 . その際、図1のようにアダプタ装置は、逆流防止用ダイオードD3と突入電流防止用の抵抗R7を介してLEDランプ負荷2と接続する。 At that time, the adapter device as in Figure 1, connected to the LED lamp load 2 via the resistor R7 of the inrush current prevention and the backflow preventing diode D3. なお、コンデンサC2は平滑用のもので、LEDランプ負荷2のチラツキを防止する。 The capacitor C2 is intended for smoothing, to prevent flickering of the LED lamp load 2.

また、照明コントローラ1は、先にも述べたように、位相制御素子にトライアックやサイリスタなどを使用したもので、それらの位相角をボリュームなどの調整手段によって、制御する回路を備えたものである。 The illumination controller 1, as described above, those using such triac or thyristor phase control element, the adjustment means, such as those phase angle volume, those having a circuit for controlling . ここでは、素子に電流容量5Aで、許容損失200W〜500W程度のものを使用した。 Here, in the current capacity 5A to devices, it was used in approximately dissipation 200W~500W. そのため、前記位相制御素子のオン状態を維持するための保持電流I は、0℃30mA(max)、25℃25mA(max)である。 Therefore, the holding current I H for maintaining the ON state of the phase control element is a 0 ℃ 30mA (max), 25 ℃ 25mA (max).

さらに、ここでのLEDランプ負荷2は、順方向電圧3.5V、順方向電流20mA、許容損失120mW程度の高輝度タイプのLEDを15個程度直列に接続したユニットを30台から50台並列に接続したものである。 Furthermore, LED lamp load 2 here, forward voltage 3.5 V, the forward current 20 mA, from 30 units to the unit connecting the LED of high intensity of about dissipation 120mW into 15 degree series 50 units parallel which are connected.

そのため、アダプタ装置は、入力電圧100V以下でトランジスタT1が30mAの電流を流せるように、アダプタ装置は電流保持手段10のエミッタ抵抗Reの値とツェナーダイオードD1のツェナー電圧Vzを選択してある。 Therefore, the adapter apparatus, as the transistor T1 is flown to 30mA of current below the input voltage 100 V, the adapter apparatus have selected the Zener voltage Vz of the values ​​and the Zener diode D1 of the emitter resistance Re of the current holding means 10. さらに、入力電圧100V以上でトランジスタT2がオンしてトランジスタT1をオフできるように、分圧抵抗13の値とツェナーダイオードD2のツェナー電圧Vzを選択してある。 Further, the transistor T2 is turned on by the input voltage of 100V or more to allow off the transistor T1, have selected Zener voltage Vz values ​​and the Zener diode D2 of the voltage dividing resistors 13.

いま、照明コントローラ1の調整手段を操作して、LEDランプ負荷2を低照度で点灯する。 Now, by operating the adjusting means of the lighting controller 1 turns on the LED lamp load 2 in low light. すなわち、照明コントローラ1の位相制御素子の位相角を図2(a)のように、90度より大きく制御した場合、アダプタ装置の入力電圧V ACが100Vより高い間は、電流保持手段10のトランジスタT2がオンとなり、トランジスタT1がオフとなって電流を流さない。 That is, the phase angle for the phase control element of the lighting controller 1 as in FIG. 2 (a), when controlling more than 90 degrees, while the input voltage V AC adapter unit is greater than 100V, the transistor of the current holding means 10. T2 is turned on, the transistor T1 is no current flows turned off. こののち、入力電圧が80V付近に低下してくると、前記トランジスタT2がオフとなり、トランジスタT1がオンとなって、保持電流I に相当する30mAの電流を流す。 Thereafter, when the input voltage is lowered in the vicinity of 80V, the transistor T2 is turned off, the transistor T1 is turned on, flow 30mA of current corresponding to the holding current I H. この80V付近の電圧は、直列に接続したLEDランプ負荷2の順方向電圧の合計値に近い値なので、LEDランプ負荷2に流れる負荷電流I は少なく、ランプ負荷2に流れる負荷電流I だけでは前記コントローラ1をオン状態に保持することは困難である。 Voltage of 80V vicinity, so values near the sum of the forward voltage of the LED lamp load 2 connected in series, the load current I L flowing through the LED lamp load 2 is small, only the load current I L flowing through the lamp load 2 in it it is difficult to hold the controller 1 to the oN state. そのため、アダプタ装置が無い場合は点灯することは困難であるが、アダプタ装置を設けたことにより、アダプタ装置がLEDランプ負荷2に代わって保持電流I を流すので、前記コントローラ1をオン状態に保持して、負荷電流I を図2(a)の斜線の部分で供給できる。 Therefore, although when the adapter device is not is difficult to light up, the provision of the adapter device, since the adapter device is passed a holding current I H in place of the LED lamp load 2, the controller 1 to the ON state holds, the load current I L can be supplied by a hatched portion in FIG. 2 (a). したがって、LEDランプ負荷2へも電流を供給できるので、低い電圧での点灯が可能になり、低照度での調光が可能になる。 Therefore, since a current can be supplied also to the LED lamp load 2, enables lighting at low voltages, allowing dimming at low illuminance.

次に、照明コントローラ1の調整手段を操作して中程度の照度で点灯する。 Next, it lit at moderate illumination by operating the adjusting means of the lighting controller 1. すなわち、位相角をほぼ90度に制御した場合、アダプタ装置の入力電圧V ACは、図2(b)のように100V以上となる。 That is, when controlling the phase angle approximately 90 degrees, the input voltage V AC adapter apparatus becomes 100V or more as shown in FIG. 2 (b). そのため、アダプタ装置の入力電圧V ACが100Vより高い間は、電流保持手段10のトランジスタT2がオンとなり、トランジスタT1がオフとなって電流を流さない。 Therefore, while the input voltage V AC adapter unit is higher than 100V, the transistor T2 of the current holding means 10 is turned on, the transistor T1 is no current turned off. 一方、入力電圧が80V付近に低下してくると、前記トランジスタT2がオフとなり、トランジスタT1がオンとなって、保持電流I に相当する30mAの電流を流す。 On the other hand, when the input voltage is lowered in the vicinity of 80V, the transistor T2 is turned off, the transistor T1 is turned on, flow 30mA of current corresponding to the holding current I H. そのため、負荷電流I を図2(b)の斜線の部分で供給することができるので、中程度の調光ができる。 Therefore, since the load current I L can be supplied by the shaded portion in FIG. 2 (b), it is moderate dimming.

さらに、照明コントローラ1の調整手段を操作して高輝度の照度で点灯する。 Further, it turned by operating the adjusting means of the lighting controller 1 at an intensity of high brightness. すなわち、位相角を図2(c)のように、位相角を90度より小さく制御した場合は、アダプタ装置の入力電圧V ACが80Vより低い電圧でもアダプタ装置の電流保持手段10が電流を流し始めるため位相角が広くなり、負荷電流I を図2(c)の斜線のように、80Vより低い電圧に対応する部分から供給することができる。 That is, as shown in FIG. 2 (c) the phase angle, the case of controlling the phase angle less than 90 degrees, the current holding means 10 also adapter device in the input voltage V AC is lower than the 80V voltage adapter device current flows the phase angle becomes wider to start, the load current I L as shown in hatched in FIG. 2 (c), can be supplied from a portion corresponding to a voltage lower than 80V. そのため、LEDランプ負荷2へ多くの電流を供給して高輝度で点灯することができる。 Therefore, it is possible to supply more current to the LED lamp load 2 lighted with high brightness.

このように点灯を制御する位相角の調整範囲を広く取れるので、LEDランプ負荷2を低照度から高輝度まで広い範囲での調光が可能になる。 Since the take wide adjustment range of the phase angle for controlling lighting, comprising a LED lamp load 2 enables dimming of a wide range from a low illuminance to high brightness.

また、その際、電流保持手段10は、電圧検出回路12によって、LEDランプ負荷2が点灯して保持電流I 以上の電流を流し始めると、定電流回路11をオフにして電流を流さない。 At that time, the current holding means 10, by the voltage detecting circuit 12, the LED lamp load 2 begins to conduct holding current I H or more current lit, no current flows to turn off the constant current circuit 11. そのため、無駄に電力を消費しないので省エネ効果が大きく、消費電力の少ないLEDランプ負荷2の特長を生かすことができる。 Therefore, unnecessarily large energy saving effect does not consume power, it is possible to utilize fewer LED lamp load 2 Features power consumption.

このように、LEDランプ負荷2の照度コントロールを大きな電流損出を生じないで、白熱ランプ用の照明コントローラを使ってできる。 Thus, the illumination intensity control of the LED lamp load 2 without causing a large current loss and out, can do with a lighting controller for incandescent lamps.

この実施例は、図3に示すように、電流保持手段10とLEDランプ負荷2との間に自励式のDC−DCコンバータ14と整流回路15を設けたものである。 This embodiment, as shown in FIG. 3, is provided with a current holding section 10 and the LED lamp load 2 self-excited DC-DC converter 14 and the rectifier circuit 15 between.

自励式のDC−DCコンバータ14は、ここでは、図3に示すようなPNPとNPNトランジスタT3、T4と共振トランスLを用いたロイヤ方式によるもので、自励式の共振型のものである。 DC-DC converter 14 of the self-excited here is due to the Royal method using the PNP and NPN transistors T3, T4 as shown in FIG. 3 a resonant transformer L, and that of the resonance type self-excited. ここでは、トランスLを非飽和で動作してトランジスタT3、T4を反転させる。 Here, to reverse the transistors T3, T4 operate in a non-saturation of the transformer L.

すなわち、入力電圧が抵抗R5とR6に入力すると、トランジスタT3、T4のベースに電圧が印加される。 That is, when the input voltage is inputted to the resistor R5 and R6, the voltage on the base of the transistor T3, T4 is applied. このとき、トランジスタT3、T4のばらつきで、飽和電圧の低い方の例えば、トランジスタT4が先に導通すると、電流I が矢印の経路で流れる。 In this case, in the variation of the transistors T3, T4, having the lower saturation voltage for example, when the transistor T4 is conductive earlier, the current I 4 flows through a path of the arrows. このとき、同時にトランスLの1次巻き線の両端に接続されたコンデンサC3と1次巻き線2×N との間でLCの共振電流I が流れる。 At this time, flow through the resonant current I P of the LC between the capacitor C3 connected to both ends of the primary winding of the transformer L and the primary winding 2 × N P simultaneously. この共振電流I によって、もう一方のトランジスタT3のコレクタ−エミッタ間には共振電圧波形が印加される。 This resonance current I P, the collector of the other transistor T3 - emitter between the resonance voltage waveform applied. この共振電圧波形は、ベースへの帰還巻き線Nfにも巻き線比に応じた電圧を誘起するので、トランジスタT3のベースへ電圧が帰還されオン状態を継続する。 The resonance voltage waveform, so induces a voltage corresponding to the even winding ratio feedback winding Nf to the base voltage to the base of the transistor T3 continues the ON state is fed back. そののち、共振電圧波形は低下し、0Vに達すると、トランジスタT4はオフになる。 Thereafter, the resonant voltage waveform decreases and reaches to 0V, and the transistor T4 is turned off. このとき、共振電圧波形は、0Vを超えて負側へ反転するので、今度は、反対側のトランジスタT3のベースが正にバイアスされてオンになる。 At this time, the resonant voltage waveform, so inverting exceed 0V to the negative side, in turn, turns on the base of the opposite transistor T3 is positively biased. その際、トランジスタT4のベース電圧は負になっているので、オフ状態を維持する。 At that time, since the base voltage of the transistor T4 is in the negative, to maintain the off state.

次に、先ほどと同様に、トランスLの1次巻き線Nfを電流が流れ、1次巻き線N に電流が流れると、トランスLの1次巻き線とコンデンサC3によって共振電流が逆極性で流れるのでトランジスタT4のコレクタ−エミッタ間に共振電流波形が印加されることになり発振を繰り返す。 Then, as before, a current flows through the primary winding Nf of the transformer L, a current flows through the primary winding N P, resonance current in the reverse polarity by the primary winding and the capacitor C3 of the transformer L repeated oscillation will be resonant current waveform between the emitter is applied - the collector of the transistor T4 flows through.

この回路の発振周波数fは、トランスの1次巻き線のインダクタンスLsとコンデンサC3との共振周波数で決まり、 The oscillation frequency f of the circuit is determined by the resonant frequency of the inductance Ls and the capacitor C3 of the transformer primary winding,
f=1/2π√Ls×C f = 1 / 2π√Ls × C
となり、この発振出力はトランスLを介して整流回路15へ出力される。 , And this oscillation output is outputted to the rectifier circuit 15 through the transformer L.

整流回路15は、チョークコイルL1とブリッジ回路16及び平滑コンデンサC4とで構成され、ブリッジ回路16で整流した出力を平滑用のコンデンサC4を介してLEDランプ負荷2へ出力する。 Rectifier circuit 15 is constituted by a choke coil L1 and the bridge circuit 16 and a smoothing capacitor C4, the output rectified by the bridge circuit 16 through a capacitor C4 for smoothing output to the LED lamp load 2.

電流保持手段10などの他の構成は、先の実施形態で述べたものと同じなので、同一符合を付して説明を省略する。 Other configurations such as the current holding means 10 are the same as those described in the previous embodiment, its description is omitted with the same reference numerals.

このように構成されるアダプター装置では、DC−DCコンバータ14は図4で示すようなトランス出力Voutを出力するが、整流回路15に出力される電力は一定である。 In thus configured adapter apparatus, DC-DC converter 14 is output to the transformer output Vout as shown in Figure 4, the power output to the rectifier circuit 15 is constant. そのため、DC−DCコンバータ14で昇圧された電圧がLEDランプ負荷2に印加されて負荷電流I が増えると電圧は下がり、電圧が下がると電流は減少することになる。 Therefore, the voltage boosted by the DC-DC converter 14 decreases the voltage when applied to the LED lamp load 2 load current I L is increased, the current will be reduced when the voltage drops. また、逆に、電流が減少すると電圧は上昇し、電圧が上昇すると電流は減少することになる。 Conversely, it increases the voltage when the current decreases, the current will be reduced when the voltage increases. したがって、LEDランプ負荷2を定電流駆動する事ができるようになり、その結果、照度調整時にLEDランプ負荷2の応答を早くすることができる。 Accordingly, the LED lamp load 2 to be able to constant current driving, as a result, it is possible to quickly response LED lamp load 2 when illuminance adjustment.

また、DC−DCコンバータ14のトランス出力Voutは、商用電源よりも周波数が高いため、整流回路の時定数が小さくてもリッブルを小さくできるので、チラツキも少なくできるという効果もある。 Also, transformer output Vout of the DC-DC converter 14 is due to the high frequency than the commercial power supply, since the time constant of the rectifier circuit can be reduced Ribburu be smaller, an effect that flickering can be reduced.

半導体レーザは白色発光ダイオード(LED)のLEDチップと同じくGaN系材料や多重量子井戸構造を使うので、このレーザを使う照明にも適用可能である。 Since the semiconductor laser using the same GaN-based material or a multiple quantum well structure and the LED chip of the white light emitting diode (LED), a is applicable to illumination using this laser.

実施形態の回路図 Circuit diagram of an embodiment (a)、(b)、(c)実施形態の作用説明図 (A), (b), the action explanatory view of (c) Embodiment 実施例1の回路図 Circuit diagram of the first embodiment 実施例1の作用説明図 Explanatory diagram of the operation of Embodiment 1 従来例の回路図 Circuit diagram of a conventional example 従来例の作用説明図 View illustrating the operation of a conventional example

符号の説明 DESCRIPTION OF SYMBOLS

1 位相制御式照明コントローラ2 LEDランプ負荷3 整流器10 電流保持手段11 定電流回路12 電圧検出回路14 DC−DCコンバータ15 整流回路L 共振トランスI 保持電流 1 phase control lighting controller 2 LED lamp load 3 rectifier 10 current holding means 11 a constant current circuit 12 a voltage detection circuit 14 DC-DC converter 15 rectifier circuit L resonant transformer I H holding current

Claims (2)

  1. 白熱ランプ負荷を調光するために設けられた位相制御式の照明コントローラと、前記白熱ランプ負荷に代えてコントローラに接続されるLEDランプ負荷との間に設けられる整流器と電流保持手段とからなり、 A phase-controlled lighting controllers provided for dimming the incandescent lamp load consists of a rectifier and a current holding section that is provided between the LED lamp load connected to the controller instead of the incandescent lamp load,
    上記整流器は照明コントローラ出力と直列に接続されて前記出力を整流し、 The rectifier the output rectifying connected to the lighting controller output in series,
    一方、上記電流保持手段は、前記整流器出力と並列に接続されるとともに、前記整流器から出力される電圧に基づいて整流器から電流を流し、前記コントローラの調整範囲が得られるようにしたLEDランプ調光用アダプタ装置。 On the other hand, the current holding means is connected in parallel with the rectifier output, a current flows from the rectifier based on the voltage output from the rectifier, LED lamp dimming that as the adjustment range of the controller is obtained use the adapter device.
  2. 上記電流保持手段とLEDランプ負荷との間に、共振トランスを用いた自励式のDC−DCコンバータと整流回路を設けた請求項1に記載のLEDランプ調光用アダプタ装置。 Between the current holding means and LED lamp load, LED lamp dimming adapter device according to claim 1 in which a DC-DC converter and the rectifier circuit of the self-excited using resonant transformer.
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