200845818 九、發明說明： 【發明所屬之技術領域】 本發明係一種電子鎭流器之電路介面。此外，本發明 還包括一種具有此種電路介面之電子鎭流器，以及一種控 制此種電子鎭流器的方法。 【先前技術】 現今已有多種不同的用於電子鎭流器之減光控制的介 面。例於一種使用1 -1 ον介面的類比方法是根據所設定的 輸入電壓在介面上設定減光階段。如果要執行的不只是減 光控制，而是更複雜的任務，則可以使用一種名爲可數位 定址發光介面（DALI : Digital Adressable Lighting Interface)，這種DALI介面是一種數位介面，或是使用一 種名爲區域操作網路（LON: Local Operating Network)現場 總線（fieldbus)，這種LON現場總線也是一種數位介面。 目前作爲街道照明用的氣體放電燈大部分還是使用傳 統的鎭流器，也就是所謂的扼流圈。近年來基於節約能源 的考量，新裝設的街道照明用的氣體放電燈在深夜時的光 功率會降低50%。在這些新裝設的氣體放電燈所使用的傳 統式鎭流器中，這種所謂的半夜電路會藉由一條控制線被 啓動，此控制線是藉由一個繼電器啓動扼流圈的一個的中 間抽頭。控制信號相當於一個230V/50HZ信號。以230V信 號無法控制屬於現有技術之電子鎭流器的介面。爲了在街 道照明中也能夠利用到電子鎭流器的好處，以及使現有的 230V控制線也能夠被應用在半夜電路上，需要有一種相應 的電子鎭流器的介面。 200845818 . 【發明內容】 本發明的一個目的是提出一種與現有街燈設施相容之 電子鎭流器的介面。本發明的另外一個目的是提出一種具 有此種介面之電子鎭流器。 採用具有申請專利第圍第1項及第7項之特徵的電 路，以及具有申請專利範圍第1 〇項之特徵的方法即可達到 上述目的。 ，【實施方式】 ， 以下配合圖式及對本發明的一種有利的實施方式作一 詳細的說明。 第1圖顯示本發明的一種由一個主電路（1)及一個副電 路（2)構成的電路介面。主電路（1)將23 0V的輸入電壓（UE) 轉換成一個加於耦合元件（3)之輸入端的適當的低電壓。耦 合元件的輸出端與副電路（2)連接。副電路將耦合元件的輸 出信號轉換成一個電子鎭流器之減光控制信號UDIM。 第2圖顯示本發明之電路介面的一種有利的實施方 I 式。一個保險絲F1被安裝在輸入端的定相線（1)中。爲了 保護後面的電路構件，在輸入端L及N之間有設置一個位 於保險絲F1之後的所謂的電壓脈衝保護裝置（SPD: Surge Protection Device)，以降低電壓峰値。在最簡單的情況下， 這個電壓脈衝保護裝置（SPD)可以是一個可變電阻。與SPD 並聯的是一個由電阻R 1及二極體D 1構成的串聯電路，其 中，二極體D1的陰極與電阻R1連接。電阻R1的任務是 使電流不會超過耦合元件的最大輸入電流。與二極體D 1 並聯的是耦合元件的輸入端，其中，耦合元件最好是由一 200845818 . 個光電耦合器U 1所構成。光電耦合器U 1的輸入端的連接 方式使其內發光二極體與二極體D1反並聯。二極體D1的 任務是使光電耦合器U 1的輸入端不會負荷輸入電壓UE的 峰値。光電耦合器可以確保主電路及副電路之間的電氣絕 緣。 光電耦合器的輸出端是由一個光電晶體管的集極和射 極所構成，其中，集極與一個內供電電壓Vee連接，射極與 一個由兩個電阻R2及R4構成的分壓器連接，此分壓器的 / 另外一端則是接地。利用分壓器可以調整輸入電壓要被視 . 爲控制信號必須超過的臨界電壓。光電耦合器的暗電流也 是經由電阻R2及R4被排出，因此不會產生任何錯誤信號。 在電阻R2及R4之間的連接點上有連接一個二極體D2的 陽極。二極體D 2的陰極與電阻R 6、電阻R 3、以及電容C1 連接。電容C1及電阻R6並聯在一起，且其另外一端均接 地。電阻R3的另外一端與電晶體Q丨的基極連接。二極體 D2及電容C 1構成一個峰値整流器。這個峰値整流器可以 & 使電晶體在無輸入電壓半周期期間保持在接通狀態。電阻 R6使電容C 1放電，並防止無意中對被切斷的電晶體q 1加 偏壓。電晶體Q1的射極接地，集極則與齊納二極體D 3的 陽極連接。齊納二極體D 3的陰極與電阻R 5連接，電阻R 5 的另外一端與供電電壓連接。電容器C 2位於接地及齊納二 極體D 3與電阻R 5的連接點之間。 第3圖顯示若干重要的信號，這些信號是在一個正弦 信號在控制輸入端之電壓U in爲額定電壓230V時產生的。 電壓被光電耦合器半波整流，並在細分後作用在電阻R4 200845818 上，電阻R4之電壓曲線爲（υ“）。這個電壓經由二極體D2 將電容C1充電，電容器C1之電壓曲線爲Ua°從第3圖可 以看出，電容器會以半波被周期性的充電’並在這些半波 之間被電阻及接通的電晶體放電。但是電壓在任何一個時 間點都大到足以使電晶體保持在被接通的狀態。在第3圖 中，被接通的電晶體使電流流過串聯的電阻R5及齊納二極 體D 3，因而在輸出端U out的齊納電壓大約是1 · 8 V。 第4圖顯示相同的信號，這些信號是在輸入端輸入一 個低於臨界電壓之電壓Uin時所產生的。分壓器上的電壓 U(R4)要小很多，其數量級大約相當於二極體D2的正向電 壓。因此電容器上的電壓UC1接近零。因此電晶體Q1不會 接通，同時輸出端的電壓會被提高到供電電壓Vee的電位。 因此輸出端電壓大約是5 V。 此時這個輸出端電壓就可以在電子鎭流器中直接作爲 減光信號。 當然經由適當的措施也可以在接地及供電電壓V。。之間 設定任何其他的電壓。 【簡單圖式說明】 第1圖：本發明之介面電路的方塊圖。 第2圖：本發明的介面電路。 第3圖：在未接通之控制線上出現的若干重要信號。 第4圖：在接通之控制線上出現的若干重要信號。 【主要元件符號說明】 1 主電路/定相線 2 副電路 200845818 3 耦合元件 Cl， C2 電容 D1， D2 二極體 D3 齊納二極體 FI 保險絲 Q1 電晶體 R1， R2 ， R3 ， R4 ， R5 ， R6 電阻 SPD 電壓脈衝保護裝置 U1 光電耦合器200845818 IX. Description of the Invention: [Technical Field of the Invention] The present invention is a circuit interface of an electronic choke. Furthermore, the present invention also includes an electronic choke having such a circuit interface, and a method of controlling such an electronic choke. [Prior Art] A variety of different interfaces for dimming control of electronic chokes are available today. An analogy method using the 1-1 ον interface is to set the dimming phase on the interface based on the set input voltage. If you want to perform more than just dimming control, but a more complex task, you can use a DALI (Digital Adressable Lighting Interface), which is a digital interface or a type of Known as the Field Operating Network (LON: Fieldbus), this LON fieldbus is also a digital interface. Most of the gas discharge lamps currently used for street lighting still use conventional chokes, also known as chokes. In recent years, based on energy conservation considerations, the newly installed gas discharge lamps for street lighting have reduced the optical power by 50% in the middle of the night. In the conventional chokes used in these newly installed gas discharge lamps, this so-called midnight circuit is activated by a control line that is activated by a relay in the middle of one of the chokes. Tap. The control signal is equivalent to a 230V/50HZ signal. The interface of the prior art electronic choke cannot be controlled with a 230V signal. In order to be able to utilize the benefits of electronic chokes in street lighting as well as to enable existing 230V control lines to be used in midnight circuits, a corresponding electronic choke interface is required. 200845818. SUMMARY OF THE INVENTION It is an object of the present invention to provide an interface for an electronic choke compatible with existing street lighting installations. Another object of the present invention is to provide an electronic choke having such an interface. This can be achieved by using a circuit having the features of items 1 and 7 of the patent application, and a method having the features of the first aspect of the patent application. [Embodiment] Hereinafter, an advantageous embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 shows a circuit interface of a main circuit (1) and a sub-circuit (2) of the present invention. The main circuit (1) converts the 23 0V input voltage (UE) into an appropriate low voltage applied to the input of the coupling element (3). The output of the coupling element is connected to the secondary circuit (2). The secondary circuit converts the output signal of the coupling element into a dimming control signal UDIM of an electronic choke. Figure 2 shows an advantageous embodiment of the circuit interface of the present invention. A fuse F1 is mounted in the phasing line (1) of the input. In order to protect the subsequent circuit components, a so-called voltage protection device (SPD: Surge Protection Device) located after the fuse F1 is provided between the input terminals L and N to reduce the voltage peak. In the simplest case, this voltage pulse protection device (SPD) can be a variable resistor. Parallel to the SPD is a series circuit composed of a resistor R 1 and a diode D 1 , wherein the cathode of the diode D1 is connected to the resistor R1. The task of resistor R1 is to keep the current from exceeding the maximum input current of the coupling element. Parallel to the diode D 1 is the input of the coupling element, wherein the coupling element is preferably formed by a 200845818 optocoupler U 1 . The input terminal of the photocoupler U 1 is connected in such a manner that its inner light-emitting diode is anti-parallel to the diode D1. The task of the diode D1 is to prevent the input of the optocoupler U1 from loading the peak of the input voltage UE. The optocoupler ensures electrical insulation between the main and secondary circuits. The output of the photocoupler is composed of a collector and an emitter of a phototransistor, wherein the collector is connected to an internal supply voltage Vee, and the emitter is connected to a voltage divider composed of two resistors R2 and R4. The other end of this voltage divider is grounded. The voltage divider can be used to adjust the input voltage to be considered as the threshold voltage that the control signal must exceed. The dark current of the photocoupler is also discharged via resistors R2 and R4, so no error signal is generated. At the junction between the resistors R2 and R4, there is an anode connected to a diode D2. The cathode of the diode D 2 is connected to the resistor R 6 , the resistor R 3 , and the capacitor C1. Capacitor C1 and resistor R6 are connected in parallel, and the other end is grounded. The other end of the resistor R3 is connected to the base of the transistor Q丨. The diode D2 and the capacitor C 1 form a peak-turn rectifier. This peak 値 rectifier can & keep the transistor in the on state during the no input voltage half cycle. Resistor R6 discharges capacitor C1 and prevents inadvertent biasing of the interrupted transistor q1. The emitter of transistor Q1 is grounded and the collector is connected to the anode of Zener diode D3. The cathode of the Zener diode D 3 is connected to the resistor R 5 , and the other end of the resistor R 5 is connected to the supply voltage. Capacitor C 2 is located between ground and the junction of Zener diode D 3 and resistor R 5 . Figure 3 shows several important signals that are generated when the voltage U in the sinusoidal signal at the control input is 230V. The voltage is half-wave rectified by the optocoupler and applied to the resistor R4 200845818 after subdivision. The voltage curve of the resistor R4 is (υ"). This voltage charges the capacitor C1 via the diode D2, and the voltage curve of the capacitor C1 is Ua. ° It can be seen from Fig. 3 that the capacitor will be periodically charged with a half wave and discharged by the resistor and the transistor between these half waves. But the voltage is large enough at any point in time to make electricity. The crystal remains in the turned-on state. In Figure 3, the turned-on transistor causes current to flow through the series resistor R5 and Zener diode D3, so the Zener voltage at the output Uout is approximately 1 · 8 V. Figure 4 shows the same signals generated when a voltage Uin below the threshold voltage is input at the input. The voltage U(R4) on the voltage divider is much smaller, on the order of It is equivalent to the forward voltage of the diode D2. Therefore, the voltage UC1 on the capacitor is close to zero. Therefore, the transistor Q1 will not be turned on, and the voltage at the output terminal will be raised to the potential of the supply voltage Vee. Therefore, the output voltage is about 5 V. At this time this The output voltage can be directly used as a dimming signal in the electronic choke. Of course, any other voltage can be set between the grounding and the supply voltage V. Depending on the appropriate measures. [Simple Schematic Description] Figure 1 Block diagram of the interface circuit of the present invention. Figure 2: Interface circuit of the present invention. Figure 3: Several important signals appearing on the control line that is not turned on. Figure 4: Several occurrences on the control line that is turned on Important signal [Main component symbol description] 1 Main circuit / phasing line 2 Sub-circuit 200845818 3 Coupling element Cl, C2 Capacitor D1, D2 Diode D3 Zener diode F fuse Q1 transistor R1, R2, R3, R4, R5, R6 resistor SPD voltage pulse protection device U1 optocoupler