200913791 九、發明說明： . 【發明所屬之技術領域】 、 本發明是有關於一種電子安定器，且特別是有關於一 種具有無負載保護電路之自激式電子安定器。 【先前技術】 隨著科技的發展及生活水準的提高，照明已成為人類 p 日*生活中不可缺少的基本需求。近年來由於全球各種產 業的蓬勃發展、商業活動的頻繁以及居家生活品質的提 高’照明用電也與日俱增，使得合乎高效率、舒適、安全、 高經濟效應之照明系統的開發也漸漸備受重視。而在大多 數的照明系統中，皆需使用安定器來工作。 "β月參考第1圖和第2圖，第^係繪示習知之自激式 半橋電子安定器之電路示意圖，帛2圖係繪示習知之自激 式全橋電子安定器之電路示意圖。轉換器22係利用上臂開 關控制線圈24來控制上臂開關26，以及利用下臂開關控制 線圈28來控制下臂開關30，使得上臂開關26和下臂開關 30相互切換，以提供後端電路一方波交流電壓來驅動負載 2…、:而富負載32為開路時，負載32兩端點會出現高 壓脈波並引發大電流流過諧振電路4〇，而使諧振電路仰、 上臂開關26和下臂開關30燒毀 因此，需要一種具無負載保護電路之電子安定器。 【發明内容】 因此，本發明的目的就是在提供一種具無負載保護電 200913791 路之電子安定器。 根據本發明之上述目的，提出一種自激式電子安定 器，此自激式電子安定器至少包含電源裝置、轉換器和保 護電路，其中電源裝置係用以提供電源電壓；轉換器係用 以將電源電壓轉換為負載之工作電壓。轉換器至少包括第 一開關和控制線圈《第一開關係電性連接電源裝置，而控 制線圈係用以控制第一開關之啟閉。保護電路至少包含全 波整流器、第二開關和啟動電路。全波整流器係電性連接 至控制線圈，以偵測跨於控制線圈之電壓，並將所測得之 電壓整流，以輸出檢測電壓；第二開關係電性連接至全波 整流器，其中第二開關係用以使全波整流器短路；啟動電 路係電性連接至全波整流器和第二開關，以接收檢測電壓 來控制第二開關，其中當檢測電壓大於一預設電壓閥值 時，啟動電路開啟第二開關，使全波整流器短路，並使跨 於控制線圈之電壓為零。 根據本發明之上述目的，提出一種自激式電子安定 器，此自激式電子安定器至少包含電源裝置、轉換器和保 護電路，其中電源裝置係用以提供電源電壓；轉換器係用 以將電源電壓轉換為負載之工作電壓。轉換器至少包括第 一開關和控制線圈。第一開關係電性連接電源裝置，而控 制線圈係用以控制第一開關之啟閉。保護電路至少包含半 波整流器、第二開關和啟動電路。半波整流器係電性連接 至控制線圈之一端，以偵測控制線圈之端電壓，並將所測 得之電壓整流，以輸出檢測電塵；第二開關係電性連接至 半波整流器和控制線圏之另一端，其中第二開關係用以使 200913791 控制線圈短路；啟動電路係電性連接至半波整流器和第二 開關，以接收檢測電壓來控制第二開關，纟中#檢測電壓 大於-預設電壓閥值時，啟動電路開啟第二開關，使半波 整流器短路，並使跨於控制線圈之電壓為零。 根據本發明之上述㈣，提出一種自激式電子安定 器，此自激式電子安定器至少包含電源裝置、轉換器和保 濩電路，#中電源裝置係用以提供電源電壓；轉換器係用 以將電源電壓轉換為負載之卫作電壓。轉換器至少包括第 一開關和控制線圈。第一開關係電性連接電源裝置，而控 制線圈係用以控制第一開關之啟閉。保護電路至少包含偵 測線圈、全波整流器'第二開關和啟動電路。偵測線圈係 用以偵測跨於控制線圈之電壓，並輸出偵測電壓至全波整 流器。全波整流器係電性連接至偵測線圈，以整流偵測電 壓來輸出檢測電壓；第二開關係電性連接至全波整流器， 其中第二開關係用以使全波整流器短路；啟動電路係電性 連接至全波整流器和第二開關，以接收檢測電壓來控制第 一開關，其中當檢測電壓大於一預設電壓閥值時，啟動電 路開啟第二開關，使全波整流器短路，並使跨於控制線圈 之電壓為零。 根據本發明之上述目的，提出一種自激式電子安定 器，此自激式電子安定器至少包含電源裝置、轉換器和保 護電路，其中電源裝置係用以提供電源電壓；轉換器係用 以將電源電壓轉換為負載之工作電壓。轉換器至少包括第 一開關和控制線圈。第一開關係電性連接電源裝置，而控 制線圈係用以控制第一開關之啟閉。保護電路至少包含偵 200913791 測線圈、半波整流器、第二開關和啟動電路。積測線圈係 用以偵測跨於控制線圈之電壓，並輸出一偵測電壓至半波 整流器。半波整流器係電性連接至控制線圈之一端’以偵 測控制線圈之端電壓，並將所測得之電壓㈣，以輸出檢 測電壓·’第二開關係電性連接至半波整流器和控制線圈之 另一端，其中第二開關係用以使控制線圈短路；啟動電路 係電性連接至半波整流器和第二開關，以接收檢測電壓來 控制第二開關’其中當檢測電壓大於一預設電壓閥值時， 啟動電路開啟第二開關，使半波整流器短路，並使跨於控 制線圈之電壓為零。 根據本發明之上述目的，提出一種自激式電子安定 器，此自激式電子安定器至少包含電源裝置、轉換器和保 4電路’丨中電源裝置係用以提供電源電壓；轉換器係用 以將電源電壓轉換為負載之工作電壓。轉換器至少包括第 -開關、第二開關、第三開關、第四開關、第__控制線圈、 第二控制線圈、第三控制線圈和第四控制、線圈。第一開關 係電性連接至電源裝置；第__控制線圈係用以控制該第一 開關；第二開關係串聯至第一開關；第二控制線圈用以控 制第一開關’第二開關係電性連接至電源裝置；第三控制 線圈係用以控制第三開Μ ;第四開關係串聯至第=開關. 第四控制線圈係用以控制第四開關1中第四二：之 端係電連接至第二控制線圈之—端。保護電路至少包 含全波整流器、第五開關和啟動電路。全波整流器係電性 連接至第二控制線圈之另—端和第四控制線圈之另一端， 其中全波整流器係用以伯測跨於第二控制線圈和第四控制 200913791 線圈之總電壓，並將所測得之總電壓整流，以輸出一檢測 電壓。第五開關係電性連接至全波整流器，其中第五開關 係用以使全波整流器短路。啟動電路係電性連接至全波整 流器和第五開關’以接收檢測電壓來控制第五開關，其中 田檢測電壓大於-預設電壓閥值時，啟動電路開啟第五開200913791 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to an electronic ballast, and more particularly to a self-excited electronic ballast having a load-free protection circuit. [Prior Art] With the development of science and technology and the improvement of living standards, lighting has become an indispensable basic requirement in human life. In recent years, due to the booming development of various industries around the world, the frequent activities of commercial activities, and the improvement of the quality of life at home, the lighting power is increasing day by day, and the development of lighting systems that are efficient, comfortable, safe, and economical has become more and more important. In most lighting systems, stabilizers are required to work. "β月refer to Figure 1 and Figure 2, the figure shows the circuit diagram of the conventional self-excited half-bridge electronic ballast, and the figure 2 shows the circuit of the conventional self-excited full-bridge electronic ballast schematic diagram. The converter 22 controls the upper arm switch 26 by using the upper arm switch control coil 24, and controls the lower arm switch 30 by the lower arm switch control coil 28 so that the upper arm switch 26 and the lower arm switch 30 are mutually switched to provide a back-end circuit square wave. When the AC voltage is used to drive the load 2..., and the rich load 32 is open, a high-voltage pulse wave appears at both ends of the load 32 and a large current is caused to flow through the resonant circuit 4〇, and the resonant circuit is tilted, the upper arm switch 26 and the lower arm are caused. Switch 30 is burned. Therefore, an electronic ballast with no load protection circuit is required. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electronic ballast with no load protection circuit 200913791. According to the above object of the present invention, a self-excited electronic ballast is provided, the self-excited electronic ballast comprising at least a power supply device, a converter and a protection circuit, wherein the power supply device is for supplying a power supply voltage; The power supply voltage is converted to the operating voltage of the load. The converter includes at least a first switch and a control coil. The first open circuit electrically connects the power supply device, and the control coil is used to control the opening and closing of the first switch. The protection circuit includes at least a full-wave rectifier, a second switch, and a startup circuit. The full-wave rectifier is electrically connected to the control coil to detect a voltage across the control coil and rectify the measured voltage to output a detection voltage; the second open relationship is electrically connected to the full-wave rectifier, wherein the second The open relationship is used to short-circuit the full-wave rectifier; the start-up circuit is electrically connected to the full-wave rectifier and the second switch to receive the detection voltage to control the second switch, wherein when the detection voltage is greater than a predetermined voltage threshold, the startup circuit Turning on the second switch shorts the full-wave rectifier and zeros the voltage across the control coil. According to the above object of the present invention, a self-excited electronic ballast is provided, the self-excited electronic ballast comprising at least a power supply device, a converter and a protection circuit, wherein the power supply device is for supplying a power supply voltage; The power supply voltage is converted to the operating voltage of the load. The converter includes at least a first switch and a control coil. The first open relationship is electrically connected to the power supply device, and the control coil is used to control the opening and closing of the first switch. The protection circuit includes at least a half-wave rectifier, a second switch, and a startup circuit. The half-wave rectifier is electrically connected to one end of the control coil to detect the terminal voltage of the control coil, and rectify the measured voltage to output the detection electric dust; the second open relationship is electrically connected to the half-wave rectifier and the control The other end of the coil, wherein the second open relationship is used to short-circuit the 200913791 control coil; the start circuit is electrically connected to the half-wave rectifier and the second switch to receive the detection voltage to control the second switch, and the detection voltage is greater than - When the voltage threshold is preset, the start circuit turns on the second switch, shorting the half-wave rectifier and making the voltage across the control coil zero. According to the above (4) of the present invention, a self-excited electronic ballast is provided. The self-excited electronic ballast includes at least a power supply device, a converter and a protection circuit, and the # power supply device is used to supply a power supply voltage; A voltage that converts the supply voltage into a load. The converter includes at least a first switch and a control coil. The first open relationship is electrically connected to the power supply device, and the control coil is used to control the opening and closing of the first switch. The protection circuit includes at least a detection coil, a full-wave rectifier 'second switch' and a start-up circuit. The detection coil is used to detect the voltage across the control coil and output the detection voltage to the full-wave rectifier. The full-wave rectifier is electrically connected to the detecting coil to rectify the detecting voltage to output the detecting voltage; the second open relationship is electrically connected to the full-wave rectifier, wherein the second open relationship is used to short-circuit the full-wave rectifier; the starting circuit is Electrically connecting to the full-wave rectifier and the second switch to receive the detection voltage to control the first switch, wherein when the detection voltage is greater than a predetermined voltage threshold, the startup circuit turns on the second switch to short-circuit the full-wave rectifier and The voltage across the control coil is zero. According to the above object of the present invention, a self-excited electronic ballast is provided, the self-excited electronic ballast comprising at least a power supply device, a converter and a protection circuit, wherein the power supply device is for supplying a power supply voltage; The power supply voltage is converted to the operating voltage of the load. The converter includes at least a first switch and a control coil. The first open relationship is electrically connected to the power supply device, and the control coil is used to control the opening and closing of the first switch. The protection circuit includes at least a 200913791 measuring coil, a half-wave rectifier, a second switch, and a starting circuit. The integrated measuring coil is used to detect the voltage across the control coil and output a detected voltage to the half-wave rectifier. The half-wave rectifier is electrically connected to one end of the control coil to detect the terminal voltage of the control coil, and the measured voltage (four) is electrically connected to the output voltage and the second open relationship to the half-wave rectifier and the control The other end of the coil, wherein the second open relationship is for shorting the control coil; the start circuit is electrically connected to the half wave rectifier and the second switch to receive the detection voltage to control the second switch 'where the detection voltage is greater than a preset At the voltage threshold, the startup circuit turns on the second switch, shorting the half-wave rectifier and zeroing the voltage across the control coil. According to the above object of the present invention, a self-excited electronic ballast is provided, the self-excited electronic ballast comprising at least a power supply device, a converter and a protection circuit for supplying a power supply voltage; To convert the power supply voltage into the operating voltage of the load. The converter includes at least a first switch, a second switch, a third switch, a fourth switch, a __ control coil, a second control coil, a third control coil, and a fourth control, coil. The first open relationship is electrically connected to the power supply device; the first __ control coil is used to control the first switch; the second open relationship is connected in series to the first switch; and the second control coil is used to control the first switch 'second open relationship Electrically connected to the power supply device; the third control coil is used to control the third opening; the fourth open relationship is connected in series to the third switch. The fourth control coil is used to control the fourth and second ends of the fourth switch 1 Electrically connected to the end of the second control coil. The protection circuit includes at least a full-wave rectifier, a fifth switch, and a startup circuit. The full-wave rectifier is electrically connected to the other end of the second control coil and the other end of the fourth control coil, wherein the full-wave rectifier is used to test the total voltage across the second control coil and the fourth control 200913791 coil. The measured total voltage is rectified to output a detection voltage. The fifth open relationship is electrically coupled to the full wave rectifier, wherein the fifth switch is used to short the full wave rectifier. The starting circuit is electrically connected to the full wave rectifier and the fifth switch ′ to receive the detection voltage to control the fifth switch, wherein when the field detection voltage is greater than the preset voltage threshold, the startup circuit is turned on.
關，使全波整流器短路，並使跨於第二控制線圈和第四控 制線圈之總電壓為零。 I 根據本發明之上述目的，提出—種自激式電子安定 器，此自激式電子安定器至少包含電源裝置、轉換器和保 護電路’纟中電源裝置係用以提供電源電壓；轉換器係用 以將電源電壓轉換為負載之工作電壓。轉換器至少包括第 -開關、第二開關、第三開關、第四開關、第一控制線圈、 第二控制線圈、第三控制線圈和第四控制線圈。第一開關 係電性連接至電源裝置；第—控制線圈制以控制該第一 開關；第二開關係串聯至第一開M;第二控制線圈用以控 制第二開關；第三開關係電性連接至電源裝置；第三控制 線圈係用以控制第三開關；第四開關係串聯至第三開二 第四控制線圈係用以控制第四開關，其中第四控制線圈之 一端係電性連接至第二控制線圈之一端。保護電路至少包 含半波整流器、第五開關和啟動電路。半波整流器係電性 連接至第二控制線圈，纟中半波整流器係用則貞測第二控 制線圈之端電壓，並將所測得之端電壓整流，以輪出一檢 測電壓。第五開關係電性連接至半波整流器和第四控制線 圈之另-端，#中第五開關係用以使第二控制線圈之另_ 端和第四控制線圈之另一端短路。啟動電路係電性連接至 200913791 丰波整流器和第五開關’以接收檢測電壓來控制第五開 關，其中當檢測電壓大於一預設電壓閥值時，啟動電路開 啟第五開關’使第二控制線圈之另—端和第四控制線圈之 另-端短路，並使跨於第二控制線圈和第吨制線圈之總 電壓為零。 【實施方式】 請參考第3圖，其係繪示根據本發明第一實施例之自 激式電子安定器200之電路示意圖。此種電子式安定器包 括父流電源210、整流器211、啟動電路、全橋轉換器、諧 振電路、保護電路以及負載212，其中’負載212例如可以 為燈管，且例如可以為冷陰極螢光燈、線型螢光燈、陰極 螢光燈、發光二極體、氙氣燈、有機發光二極體等燈管等 效電阻變動範圍小及大的燈管。 在本發明之第一實施例中，整流器211係用以將交流 電源210所提供之穩定交流輸入電壓轉換為一穩定直流電 壓。整流器211可為包含有二個二極體之半波整流器或是 包含有四個二極體之全波整流器，且整流器211更包含有 一穩壓電容Cdc，使整流器211所提供之直流電壓之波形 能較為平穩。 啟動電路包括啟動電阻214、啟動電容216、交流開關 元件（Dac)218以及一放電二極體219,其中啟動電阻214 之一端電性連接整流器211，另一端則電性連接啟動電容 216和父流開關元件218。整流器211所提供之直流電壓透 過啟動電阻214對啟動電容216充電，使交流開關元件218 200913791 開啟，以啟動全橋轉換器之作業。放電二極體219係用以 防止全橋轉換器啟動後再觸發交流開關元件218。 根據本發明之較佳實施例，全橋轉換器包括開關220、 控制線圈222、限壓器223、開關224、控制線圈226、限 壓器227、開關228、控制線圈230、限壓器23卜開關232、 控制線圈234、限壓器236、以及轉向控制線圈238，其中 開關220和228為上臂開關；開關224和232為下臂開關； 控制線圈222、控線圈226、控制線圈230、控制線圈234 以及轉向控制線圈238皆纏繞於同一顆鐵心繞組上，且控 制線圈222和控制線圈234之極性與控制線圈226、控制線 圈230以及轉向控制線圈238之極性相反；限壓器223、限 壓器227、限壓器231以及限壓器236係各由兩個陽極相對 之齊納二極體串聯所組成。 當交流開關元件218開啟之後，便會有電流流經控制 線圈226，此時，控制線圈230會感應產生一電流往開關 228的方向流去。當控制線圈226的電壓超過開關224之閘 極臨界電壓時，開關224便會開啟，類似地，當控制線圈 230上的電壓超過開關228之閘極臨界電壓時，開關228 便會開啟。限壓器227與控制線圈226並聯以提供控制線 圈226 一電流釋放路徑，類似地，限壓器231與控制線圈 230並聯以提供控制線圈230 —電流釋放路徑。全橋轉換器 開始工作後，交流開關元件218便會進入關閉狀態，在全 橋轉換器工作期間不再開啟。 當開關224和開關228開啟後，便會有電流從諧振電 路流過轉向控制線圈238,此時，控制線圈222會感應產生 200913791 一電流往開關224的方向流去，控制線圈234會感應產生 一電流往開關232的方向流去。當控制線圈222的電壓超 過開關220之閘極臨界電壓時，開關22〇便會開啟，類似 地’當控制線圈234上的電壓超過開關232之閘極臨界電 壓時，開關232便會開啟。限壓器223與控制線圈222並 聯以提供控制線圈222 —電流釋放路徑，類似地，限壓器 236與控制線圈234並聯以提供控制線圈234 —電流釋放路 徑。 當開關220和開關232開啟後，便會有電流流經轉向 控制線圈238並往諧振電路流去，此時控制線圈226會感 應產生一電流往開關224的方向流去，而控制線圈230亦 會感應產生一電流往開關228的方向流去《當控制線圈226 的電壓超過開關224之閘極臨界電壓時，開關224便會再 度開啟’類似地’當控制線圈230上的電壓超過開關228 之閘極臨界電壓時，開關228亦會再度開啟。 根據本發明之較佳實施例，諧振電路包括一諧振電感 240、一濾直流電容242以及一諧振電容244，其中諧振電 容244與負載212並聯。諧振電路係用以將全橋轉換器所 輸出之方波電壓轉換成弦波電壓並輸出至負載212,且諧振 電路亦具有零電壓切換（Zero Voltage Switching)之功能。 保護電路包含全波整流器260、時間調整電路262、時 間調整電路264、啟動電路266和開關268，其中啟動電路 266可例如為交流開關元件。全波整流器26〇係電性連接至 控制線圈234之兩端點，以偵測跨於控制線圈234之電壓， 並將所測得之電壓整流，以輸出檢測電壓，其中檢測電壓 12 200913791 係用來檢測負載212是否為開路。開關_係電性連接至 全波整流器260’以使全波整㈣26()短路。在本實施例中 開關268具有輸入端、輸出端和控制端，其中輸入端 性連接至端點A，而輸出端係電性連接至端點B，當開關 268為開啟時，端點A和端點B即為輯，而全波整流器 也隨之短路。啟動電路旅係電性連接至全波整流器 260和開關268,以接收檢測電壓來控制開關⑽之啟閉。 當負載212為開路時，負載212之兩端會出現高壓脈 波’而諧振電路也會流過大電流，因此全波整流器可 於控制線圈234之兩端則貞測到大電壓。當檢測電壓大於 啟動電路266之預設電壓閥值時，啟動電路施會開啟開 關268 ’使全波整流器260短路。當全波整流器26〇短路時， 跨於第四控制線圈234之電壓將會降到零，同時跨於其他 線圈上的電壓也降到零，使全橋轉換器停止高頻切換動 作以保羞電子女疋器。當跨於控制線圈234之電壓降至 零後，檢測電壓的值也會隨之降低，當檢測電壓的值低於 預》又電壓閥值時，開關268會關閉，使電子安定器2〇〇回 復到正常工作狀態，此即為復擊（re-striking)功能。若負載 212仍為開路，则檢測會再度上升，開啟開關268來保護電 路。 值得注意的是’本實施例雖僅繪示全波整流器26〇係 電性連接至第四控制線圈234，以偵測跨於第四控制線圈 234之電壓，但全波整流器26〇並不受限於連接至第四控制 線圈234。全波整流器260亦可電性連接至其他控制線圈， 來降低跨於其他控制線圈之電壓。 13 200913791 時間調整電路262係電性連接於啟動電路266和電包 3電阻262a、262c和電容262b。電阻262c係與電容262b 並聯而形成放電電路，而電阻262&係串聯放電電路，以對 電谷262b充電。第一時間調整電路262可控制檢測電壓傳 送至啟動電路266之時間，因此只要調整第一時間調整電 路262的電路參數即可控制負載212兩端的高壓脈波的持 續時間。適當地調整高壓脈波的持續時間，可避免電子安 定器200損壞。 時間調整電路264係電性連接於啟動電路266和第五 開關268之間’用以控制檢測電壓施加於第五開關⑽之 時間，其中時間調整電路264包含電容264a和電阻264b。 因此只要調整時間調整電路264的電路參數即可控制復擊 機制啟動的時間。 由本發明之第一實施例可知，保護電路可於負載開路 時保護電路元件不被燒毀，而且還提供了復擊功能，使電 子安疋器於不關閉輸入電源的情況下重置保護電路若負 載212回覆至正常狀態便可重新正常工作。 清參考第4圖’其係綠示根據本發明之第二實施例之 自激式電子安定器_之電路示意圖。自激式電子安定器 3〇〇係類似於自激式電子安定器細，但自激式電子安定器 為自激式半橋電子安定器，其中全波整流器260係電性 連接至第一控制線圈226。自激式電子安定器綱之優點係 類似於自激:式電子安定器2〇〇，故不再贅述。 μ參考第5 ®，其料示根據本發明之第三實施例之 自激式電子安定器400之電路示意圖。自激式電子安定器 200913791 400係類似於自激式電子安定器2〇〇，但不同之處在於，自 激式電子安定器400係使用半波整流器280來代替全波整 流器260，而開關268之輸出端係電性連接至控制線圈234 之端點c。在自激式電子安定器400中，半波整流器28〇 係電性連接至控制線圈234之另一端點D，以偵測端點D 之電壓，並將所測得之電壓整流，以輸出一檢測電壓。當 檢測電壓之值大於啟動電路266之預設電壓閥值時，啟動 電路266會開啟第五開關268，而使第四控制線圈234短 路，意即跨於第四控制線圈234之電壓值為零。自激式電 子安定器400之保護電路的作動方式係類似於自激式電子 安定器300之保護電路，因此其優點亦相同，故在此不再 贅述。 值付注意的是，本實施例雖僅繪示半波整流器2 8 〇和 開關268係電性連接至控制線圈234,以偵測跨於控制線圈 234之電壓’但半波整流器28〇和開關268並不受限於連接 至控制線圈234。半波整流器280和開關268亦可電性連接 至其他控制線圈’來降低跨於其他控制線圈之電壓。 請同時參考第6圖和第7圖，第6圖係繪示根據本發 明之第四實施例之自激式電子安定器500之電路示意圖， 第7圖係繪示根據本發明之第五實施例之自激式電子安定 器600之電路示意圖。自激式電子安定器5〇〇和自激式電 子安定器600係類似於自激式電子安定器3〇〇，但不同之處 在於自激式電子安定器500和600係使用半波整流器28〇 來代替全波整流器260。半波整流器280和開關268係電性 連接至控制線圈226,以偵測控制線圈226之端電壓。自激 15 200913791 式電子安定器500和600之保護電路的作動方式係類似於 自激式電子安定器綱之保護電路，因此其優點亦、 故在此不再贅述。Off, the full-wave rectifier is shorted and the total voltage across the second control coil and the fourth control coil is zero. According to the above object of the present invention, a self-excited electronic ballast is provided, the self-excited electronic ballast comprising at least a power supply device, a converter and a protection circuit, wherein the power supply device is used to supply a power supply voltage; The operating voltage used to convert the supply voltage to the load. The converter includes at least a first switch, a second switch, a third switch, a fourth switch, a first control coil, a second control coil, a third control coil, and a fourth control coil. The first open relationship is electrically connected to the power supply device; the first control coil is configured to control the first switch; the second open relationship is connected to the first open M; the second control coil is used to control the second switch; and the third open relationship is Connected to the power supply device; the third control coil is used to control the third switch; the fourth open relationship is connected to the third open second control coil to control the fourth switch, wherein one of the fourth control coils is electrically connected Connected to one end of the second control coil. The protection circuit includes at least a half-wave rectifier, a fifth switch, and a startup circuit. The half-wave rectifier is electrically connected to the second control coil, and the half-wave rectifier is used to measure the terminal voltage of the second control coil and rectify the measured terminal voltage to rotate a detection voltage. The fifth open relationship is electrically connected to the other end of the half wave rectifier and the fourth control coil, and the fifth open relationship of # is used to short the other end of the second control coil and the other end of the fourth control coil. The startup circuit is electrically connected to the 200913791 Fengbo rectifier and the fifth switch to receive the detection voltage to control the fifth switch, wherein when the detection voltage is greater than a predetermined voltage threshold, the startup circuit turns on the fifth switch to make the second control The other end of the coil is shorted to the other end of the fourth control coil, and the total voltage across the second control coil and the ton coil is zero. [Embodiment] Please refer to FIG. 3, which is a circuit diagram of a self-excited electronic ballast 200 according to a first embodiment of the present invention. The electronic ballast includes a parent current source 210, a rectifier 211, a starter circuit, a full bridge converter, a resonant circuit, a protection circuit, and a load 212, where the 'load 212 can be, for example, a lamp and can be, for example, a cold cathode fluorescent Lamps, linear fluorescent lamps, cathode fluorescent lamps, light-emitting diodes, xenon lamps, organic light-emitting diodes, and the like have a small range of equivalent resistance variations and large lamps. In a first embodiment of the invention, rectifier 211 is operative to convert the regulated AC input voltage provided by AC power source 210 to a regulated DC voltage. The rectifier 211 can be a half-wave rectifier including two diodes or a full-wave rectifier including four diodes, and the rectifier 211 further includes a voltage stabilizing capacitor Cdc, so that the waveform of the DC voltage provided by the rectifier 211 Can be relatively stable. The starting circuit includes a starting resistor 214, a starting capacitor 216, an alternating current switching element (Dac) 218, and a discharge diode 219, wherein one end of the starting resistor 214 is electrically connected to the rectifier 211, and the other end is electrically connected to the starting capacitor 216 and the parent current. Switching element 218. The DC voltage provided by rectifier 211 charges startup capacitor 216 through startup resistor 214, causing AC switching component 218 200913791 to turn on to initiate operation of the full bridge converter. The discharge diode 219 is used to prevent the AC switching element 218 from being triggered after the full bridge converter is activated. According to a preferred embodiment of the present invention, the full bridge converter includes a switch 220, a control coil 222, a voltage limiter 223, a switch 224, a control coil 226, a voltage limiter 227, a switch 228, a control coil 230, and a voltage limiter 23 The switch 232, the control coil 234, the voltage limiter 236, and the steering control coil 238, wherein the switches 220 and 228 are upper arm switches; the switches 224 and 232 are lower arm switches; the control coil 222, the control coil 226, the control coil 230, and the control coil 234 and the steering control coil 238 are both wound on the same core winding, and the polarities of the control coil 222 and the control coil 234 are opposite to those of the control coil 226, the control coil 230, and the steering control coil 238; the voltage limiter 223, the voltage limiter 227, the voltage limiter 231 and the voltage limiter 236 are each composed of two anodes connected in series with the Zener diodes. When the AC switching element 218 is turned on, current will flow through the control coil 226, at which point the control coil 230 will induce a current to flow in the direction of the switch 228. When the voltage of the control coil 226 exceeds the gate threshold voltage of the switch 224, the switch 224 is turned on. Similarly, when the voltage on the control coil 230 exceeds the gate threshold voltage of the switch 228, the switch 228 is turned "on". Voltage limiter 227 is coupled in parallel with control coil 226 to provide control coil 226 a current release path. Similarly, voltage limiter 231 is coupled in parallel with control coil 230 to provide control coil 230 - current release path. After the full bridge converter starts operating, the AC switching element 218 enters a closed state and is no longer turned on during the operation of the full bridge converter. When the switch 224 and the switch 228 are turned on, a current flows from the resonant circuit through the steering control coil 238. At this time, the control coil 222 senses a current flowing to the switch 224 in 200913791, and the control coil 234 senses a Current flows in the direction of switch 232. When the voltage of the control coil 222 exceeds the gate threshold voltage of the switch 220, the switch 22 will open, similarly 'when the voltage on the control coil 234 exceeds the gate threshold voltage of the switch 232, the switch 232 will open. Voltage limiter 223 is coupled in parallel with control coil 222 to provide control coil 222 - current release path. Similarly, voltage limiter 236 is coupled in parallel with control coil 234 to provide control coil 234 - current release path. When the switch 220 and the switch 232 are turned on, a current flows through the steering control coil 238 and flows to the resonant circuit. At this time, the control coil 226 induces a current to flow in the direction of the switch 224, and the control coil 230 also Induction generates a current flow in the direction of switch 228. When the voltage of control coil 226 exceeds the gate threshold voltage of switch 224, switch 224 is again turned on 'similarly' when the voltage on control coil 230 exceeds the gate of switch 228. At the extreme threshold voltage, the switch 228 will also be turned on again. In accordance with a preferred embodiment of the present invention, the resonant circuit includes a resonant inductor 240, a DC filter capacitor 242, and a resonant capacitor 244, wherein the resonant capacitor 244 is coupled in parallel with the load 212. The resonant circuit is used to convert the square wave voltage outputted by the full bridge converter into a sinusoidal voltage and output to the load 212, and the resonant circuit also has the function of Zero Voltage Switching. The protection circuit includes a full wave rectifier 260, a time adjustment circuit 262, a time adjustment circuit 264, a startup circuit 266, and a switch 268, wherein the startup circuit 266 can be, for example, an AC switching element. The full-wave rectifier 26 is electrically connected to the two ends of the control coil 234 to detect the voltage across the control coil 234, and rectify the measured voltage to output a detection voltage, wherein the detection voltage 12 200913791 is used. To check if the load 212 is open. Switch _ is electrically coupled to full-wave rectifier 260' to short-circuit the full-wave (four) 26(). In this embodiment, the switch 268 has an input end, an output end, and a control end, wherein the input end is connected to the end point A, and the output end is electrically connected to the end point B. When the switch 268 is turned on, the end point A and Endpoint B is the sequence and the full-wave rectifier is also shorted. The start circuit travel system is electrically connected to the full wave rectifier 260 and the switch 268 to receive the detection voltage to control the opening and closing of the switch (10). When the load 212 is open, a high voltage pulse appears at both ends of the load 212 and a large current flows through the resonant circuit. Therefore, the full-wave rectifier can detect a large voltage across the control coil 234. When the sense voltage is greater than the preset voltage threshold of the start circuit 266, the start circuit applies an open switch 268' to short the full wave rectifier 260. When the full-wave rectifier 26 is short-circuited, the voltage across the fourth control coil 234 will drop to zero, and the voltage across the other coils will also drop to zero, causing the full-bridge converter to stop the high-frequency switching action to be shy. Electronic daughter-in-law. When the voltage across the control coil 234 drops to zero, the value of the sense voltage also decreases. When the value of the sense voltage is lower than the pre-voltage threshold, the switch 268 is turned off, causing the electronic ballast 2 to 〇〇 Revert to normal working status, this is the re-striking function. If load 212 is still open, the test will rise again and switch 268 is turned on to protect the circuit. It should be noted that the present embodiment only shows that the full-wave rectifier 26 is electrically connected to the fourth control coil 234 to detect the voltage across the fourth control coil 234, but the full-wave rectifier 26 is not affected. Limited to being connected to the fourth control coil 234. The full wave rectifier 260 can also be electrically coupled to other control coils to reduce the voltage across other control coils. 13 200913791 The time adjustment circuit 262 is electrically connected to the startup circuit 266 and the electrical package 3 resistors 262a, 262c and the capacitor 262b. The resistor 262c is connected in parallel with the capacitor 262b to form a discharge circuit, and the resistor 262& is a series discharge circuit for charging the valley 262b. The first time adjustment circuit 262 can control the time at which the detection voltage is transmitted to the startup circuit 266, so that the duration of the high voltage pulse wave across the load 212 can be controlled by adjusting the circuit parameters of the first time adjustment circuit 262. The electronic stabilizer 200 can be prevented from being damaged by appropriately adjusting the duration of the high voltage pulse. The time adjustment circuit 264 is electrically connected between the start circuit 266 and the fifth switch 268 to control the time during which the detection voltage is applied to the fifth switch (10), wherein the time adjustment circuit 264 includes a capacitor 264a and a resistor 264b. Therefore, the time of the restart of the re-attack mechanism can be controlled by adjusting the circuit parameters of the time adjustment circuit 264. According to the first embodiment of the present invention, the protection circuit can protect the circuit component from being burned when the load is open, and also provides a re-attack function, so that the electronic amp resets the protection circuit if the input power is not turned off. 212 will return to normal status and can work again. 4 is a circuit diagram showing a self-excited electronic ballast according to a second embodiment of the present invention. The self-excited electronic ballast 3 is similar to the self-excited electronic ballast, but the self-excited electronic ballast is a self-excited half-bridge electronic ballast, in which the full-wave rectifier 260 is electrically connected to the first control. Coil 226. The advantages of the self-excited electronic ballast are similar to the self-excited: electronic ballast 2, so it will not be described again. μ refers to the 5th, which shows a schematic circuit diagram of the self-excited electronic ballast 400 according to the third embodiment of the present invention. The self-excited electronic ballast 200913791 400 is similar to the self-excited electronic ballast 2, except that the self-excited electronic ballast 400 uses a half-wave rectifier 280 instead of the full-wave rectifier 260, while the switch 268 The output is electrically connected to the end c of the control coil 234. In the self-excited electronic ballast 400, the half-wave rectifier 28 is electrically connected to the other end D of the control coil 234 to detect the voltage of the terminal D, and rectify the measured voltage to output a Detect voltage. When the value of the detection voltage is greater than the preset voltage threshold of the startup circuit 266, the startup circuit 266 turns on the fifth switch 268, and shorts the fourth control coil 234, that is, the voltage across the fourth control coil 234 is zero. . The protection circuit of the self-excited electronic ballast 400 is similar to the protection circuit of the self-excited electronic ballast 300, so the advantages are the same, and therefore will not be described herein. It should be noted that the present embodiment only shows that the half-wave rectifier 28 8 〇 and the switch 268 are electrically connected to the control coil 234 to detect the voltage across the control coil 234 'but the half-wave rectifier 28 〇 and the switch 268 is not limited to being connected to control coil 234. The half-wave rectifier 280 and switch 268 can also be electrically coupled to other control coils to reduce the voltage across other control coils. Please refer to FIG. 6 and FIG. 7 simultaneously. FIG. 6 is a schematic circuit diagram of a self-excited electronic ballast 500 according to a fourth embodiment of the present invention, and FIG. 7 is a fifth embodiment of the present invention. A schematic diagram of a circuit of a self-excited electronic ballast 600. The self-excited electronic ballast 5〇〇 and the self-excited electronic ballast 600 are similar to the self-excited electronic ballast 3〇〇, but the difference is that the self-excited electronic ballasts 500 and 600 use a half-wave rectifier 28 Instead of the full wave rectifier 260. The half-wave rectifier 280 and the switch 268 are electrically connected to the control coil 226 to detect the terminal voltage of the control coil 226. The self-excited 15 200913791 type electronic ballasts 500 and 600 protection circuit is operated in a similar manner to the self-excited electronic ballast protection circuit, so its advantages are also not described here.
Μ翏考第8圖，其係緣示根據本發明之第六實施例之 自激式電子安U 700之電路示意圖。自激式電子安定器 係類似於自激式電子安定器2〇〇，但不同之處在於自激式電 子安定器700的保護電路連接方式係不同於自激式電子安 定器200的保護電路連接方式。在自激式電子安定器· 中’控制線圈234之第一端係電性連接至控制線圈226之 第一端’而全波整流器260係電性連接至控制線圈咖之 第二端和控制線圈234之第二端。全波整流器26〇係用以 偵測跨於控制線圈234和控制線圈226之總電壓，並將所 測得之總電壓整流，以輸出檢測電壓。當檢測電壓超過啟 動電路266之預設電壓闊值時，啟動電路加會開啟開關 使得控制線目226之第二端和控制線圈…之第二端 短路’意即控制線圈226之第二端和控制線圈咖之第二 =短路之電壓差為零’如此全橋轉換器會停止高頻切換動 作’以保護電子安定器。由於自激式電子安定器之保護電 ^的作動方式係類似於自激式電子安定器扇之保護電 路，因此其優點亦相同，故在此不再贅述。 ^同料考第9圖和第1G圖，第9圖係㈣根據本發 :七貫施例之自激式電子安定器_之電路示意圖， ^圖係繪示根據本發明之“實施例之電子安定器_ 示意圖。自激式電子安定器_和_係類似於電 子女疋器400，但不同之虛^ 處在於自激式電子安定器9〇〇和 16 200913791 800的保護電路連接方式係不同於自激式電子安定器_ 的保護電路連接方式。在自激式電子安定$ _中，控制 線圈234之第—端係電性連接至控制線圈226之第-^， 而半波整流器280係電性連接至控制線圈226之第二端； 開關268的輸出端係'電性連接至控制線圈w之第二端， 藉由上述連接方式半波整流器28〇可積測控制線圈之 端電壓，並將其整流’以輸出檢測電壓。當檢測電壓大於 啟動電路266之預設電麼閥值時，啟動電路266會開啟開 關268,使控制線圈226之第二端和控制線圈…之第二端 短路，意即控制線_ 226之第二端和控制線圈234之第二 端短路之電壓差為零，如此全橋轉換器會停止高頻切換動 作’以保護電子安定器。類似地，在自激式電子安定器_ 中，半波整流器280係電性連接至控制線圈234之第二端； 開關268係電性連接至控制線圈226之第二端。藉由上述 連接方式半波整流器280可偵測控制線圈234之端電壓， 並將其整流’以輸出檢測電壓。當檢測電壓大於啟動電路 266之預設電壓閥值時，啟動電路施會開啟開關，使 控制線圈226之第二端和控制線圈234之第二端短路，意 即控制線圈226之第二端和控制線圈234之第二端短路之 電壓差為零’如此全橋轉換器會停止高頻切換動作，以保 護電子安定器。 由於自激式電子安定器800和900之保護電路的作動 方式係類似於自激式電子安定器400之保護電路，因此其 優點亦相同，故在此就不再贅述。 〇月參考第11圖，其係繪示根據本發明之第九實施例之 17 200913791Referring to Figure 8, there is shown a circuit diagram of a self-excited electronic U 700 according to a sixth embodiment of the present invention. The self-excited electronic ballast is similar to the self-excited electronic ballast 2〇〇, but the difference is that the protection circuit connection mode of the self-excited electronic ballast 700 is different from the protection circuit connection of the self-excited electronic ballast 200. the way. In the self-excited electronic ballast, the first end of the control coil 234 is electrically connected to the first end of the control coil 226, and the full-wave rectifier 260 is electrically connected to the second end of the control coil and the control coil. The second end of 234. The full-wave rectifier 26 is configured to detect the total voltage across the control coil 234 and the control coil 226 and to rectify the measured total voltage to output a detection voltage. When the detection voltage exceeds the preset voltage threshold of the startup circuit 266, the startup circuit adds an opening switch such that the second end of the control line 226 and the second end of the control coil are short-circuited, that is, the second end of the control coil 226 The second of the control coils = the voltage difference of the short circuit is zero 'so the full bridge converter will stop the high frequency switching action' to protect the electronic ballast. Since the protection mode of the self-excited electronic ballast is similar to the protection circuit of the self-excited electronic ballast fan, the advantages are the same, and therefore will not be described herein. ^同法考第9图和第1G图,第9图(四) According to the present invention: a schematic diagram of a self-excited electronic ballast of a seven-part embodiment, the figure shows a "embodiment according to the present invention" Electronic ballast _ schematic. Self-excited electronic ballast _ and _ are similar to electronic scorpion 400, but the difference between the self-excited electronic ballast 9〇〇 and 16 200913791 800 protection circuit connection system Different from the self-excited electronic ballast _ the protection circuit connection mode. In the self-excited electronic stability $ _, the first end of the control coil 234 is electrically connected to the first -^ of the control coil 226, and the half-wave rectifier 280 Electrically connected to the second end of the control coil 226; the output end of the switch 268 is electrically connected to the second end of the control coil w, and the terminal voltage of the control coil can be integrated by the above-mentioned connection mode half-wave rectifier 28 And rectifying it to output the detection voltage. When the detection voltage is greater than the preset threshold of the startup circuit 266, the startup circuit 266 turns on the switch 268, causing the second end of the control coil 226 and the second of the control coil. Short circuit at the end, meaning the second end of the control line _ 226 The voltage difference between the short-circuit of the second end of the control coil 234 is zero, so that the full-bridge converter stops the high-frequency switching action to protect the electronic ballast. Similarly, in the self-excited electronic ballast _, the half-wave rectifier 280 system Electrically connected to the second end of the control coil 234; the switch 268 is electrically connected to the second end of the control coil 226. The half-wave rectifier 280 can detect the voltage of the terminal of the control coil 234 and rectify the same. The output voltage is detected. When the detection voltage is greater than the preset voltage threshold of the startup circuit 266, the startup circuit applies a switch to open the second end of the control coil 226 and the second end of the control coil 234, that is, the control coil The voltage difference between the second end of 226 and the second end of control coil 234 is zero 'so that the full bridge converter stops the high frequency switching action to protect the electronic ballast. Protection by self-excited electronic ballasts 800 and 900 The operation mode of the circuit is similar to the protection circuit of the self-excited electronic ballast 400, so the advantages thereof are also the same, so it will not be described here. The month refers to the 11th figure, which is shown according to this The ninth embodiment Ming 17200913791
自激式電子安u屬之電路示意圖。自激式電子安定器 議係類似於自激式電子安定器·，但不同之處在於自 激式電子安定器議之保護電路更包含_線圈。债 測線圈290和其他線圈均纏繞於同一鐵心上，故偵測線圈 2卯可福測到控制線圈的電壓，再利用全波整流器26〇將積 測到的電壓整流，以輸出檢測電壓。自料電子妓器1〇〇〇 之保護電路的作動方式係類似於自激式電子安定器之 保護電路，因此其優點亦相同，故在此就不再資述。 。月參考第12圖’其係緣示根據本發明之第十實施例之 自激式電子安^器1100之電路示意圖。自激式電子安定器 膽係類似於自激式電子安定器彻，但不同之處在於自 激式電子安定器1100之保護電路更包含摘測線圈29〇。镇 測線圈290和其他線圈均纏繞於同一鐵心上，故偵測線圈 290可偵測到控制線圈的電壓，再利用半波整流器將摘 測到的電壓整流’以輸出檢測電壓。自激式電子安定器U〇〇 之保護電路的作動方式係類似於自激式電子安定器4〇〇之 保岌電路，因此其優點亦相同，故在此就不再贅述。 請參考第13圖，其係繪示根據本發明之第十一實施例 之自激式電子安定器12〇〇之電路示意。自激式電子安定 器1200係類似於自激式電子安定器11〇〇，但不同之處在於 自激式電子安定器1200為半橋式電子安定器。自激式電子 安定器1200之保護電路的作動方式係類似於自激式電子安 定器1100之保護電路，因此其優點亦相同，故在此就不再 贅述。 請參考第14圖，其係繪示根據本發明之第十二實施例 18 200913791 之自激式電子安定器i300之電路示意圖。自激式電子安定 器1300係類似於自激式電子安定器1〇〇〇，但不同之處在於 自激式電子安定器1300為自激式半橋電子安定器。自激式 電子安定器1300之保護電路的作動方式係類似於自激式電 子安定器1000之保護電路，因此其優點亦相同，故在此就 不再贅述。 请參考第15圖，其係繪示根據本發明之第十三實施例 之自激式電子安定器M00之電路示意圖。自激式電子安定 器1400係類似於自激式電子安定器7〇〇，但不同之處在於 自激式電子安定器1400之保護電路更包含了為平衡電容 299。控制線圈234之第一端係電性連接至控制線圈226之 第一端，而平衡電容299係電性連接於控制線圈226之第 二端和全波整流器260之間。平衡電容299係電性連接於 控制線圈226和全波整流器260之間，用以避免流入全波 整流器260之電流發生偏移（offset)現象來平衡開關22〇、 228、226和232的工作責任週*(duty)。雖然本實施例僅揭 示平衡電容299電性連接於控制線圈226之第二端和全波 整流器260之間，但並不以此為限。平衡電容299亦可電 性連接於控制線圈234之第二端和全波整流器26〇之間， 如此可獲得相同之效果。 凊參考第16圖，其係繪示根據本發明之第十四實施例 之自激式電子安定器15GG之電路示意圖。自激式電子安定 器1500係類似於自激式電子安定器7〇〇,但不同之處在於 電子安定器測更包含全波整流器剔。全波整流器· 係電性連接至控制線圈226之兩端，㈣關268開啟後， 19 200913791 全波整流器360會使控制線圈226短路。由於自激式電子 安定器1500之作動方式和優點係類似於自〉數式電子安定器 7〇〇’故在此不再贅述。另外，值得一提的是全波整流器3的 亦可套用於本發明之其他實施例所提出的電子安子器。 雖然本發明已以較佳實施例揭露如上，然其並非用以 限$本發明，任何熟習此技藝者，在不脫離本發明之精神 和範圍内，當可作各種之更動與潤飾，因此本發明之保護 範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、和優點能更明 顯易懂，上文特舉一較佳實施例，並配合所附圖式，作詳 細說明如下： 第1圖係繪示習知之自激式半橋電子安定器之電路示 意圖。 第2囷係繪示另一習知之自激式電子安定器之電路示 意圖。 第3圖係繪示根據本發明第一實施例之自激式電子安 定器之電路示意圖。 第4圖係繪示根據本發明之第二實施例之自激式電子 安定器之電路示意圖。 第5圖係緣示根據本發明之第三實施例之自激式電子 安定器之電路示意圖。 第ό圖係緣示根據本發明之第四實施例之自激式電子 安定器之電路示意圖。 20 200913791 第7圖係緣不根據本發明之第五實施例之自激 安定器之電路示意圖。 第8圖係繪示根據本發明之第六實施例之自激式電子 安定器之電路示意圖。 第9圖係緣示根據本發明之第七實施例之自激式電子 安定器之電路示意圖。 第10圖係綠示根據本發明之第八實施例之自激式電子 安定器的電路示意圖。 第11圖係綠示根據本發明之第九實施例之自激式電子 安定器之電路示意圖。 第12圖係綠示根據本發明之第十實施例之自激式電子 安定器之電路示意圖。 第13圖係緣示根據本發明之第十一實施例之自激式電 子安定器之電路示意圖。 第14圖係緣不根據本發明之第十二實施例之自激式電 子安定器之電路示意圖。 第15圖讀讀據本發明之第十三實施例之自激式電 子安定器之電路示意圖。 第16圖係繪示根據本發明之第十四實施例之自激式電 子安定器之電路示意圖。 【主要元件符號說明】 22 :轉換器 26 :上臂開關 30 :下臂開關 24 :上臂開關控制線圈 28 :下臂開關控制線圈 32 :負載 21 200913791 40 :諧振電容 2〇〇 :電子安定器 210 :交流電源 211 :整流器 212 :負載 214 :啟動電阻 216 :啟動電容 218 :交流開關元件 219 :放電二極體 220 :開關 222 :控制線圈 223 :限壓器 224 :開關 226 :控制線圈 227 :限壓器 228 :開關 230 :控制線圈 231 :限壓器 232 :開關 234 :控制線圈 236 :限壓器 238 :轉向控制線圈 240 :諧振電感 242 :濾直流電容 244 :諧振電容 260 :全波整流器 262 :時間調整電路 262a :電阻 262b :電容 262c :電阻 264 :時間調整電路 264a :電容 264b :電阻 266 :啟動電路 268 :開關 280 :半波整流器 290 :偵測線圈 299 :平衡電容 360 :全波整流器 300 :自激式電子安定器 400 :自激式電子安定器 500 :自激式電子安定器 600:自激式電子安定器 700:自激式電子安定器 800:自激式電子安定器 900:自激式電子安定器 1000 :自激式電子安定器 1100 ·自激式電子安定器 1200 :自激式電子安定器 13 0 0 .自激式電子安定 1400 :自激式電子安定器 1500 ·自激式電子安定器 A :端點 B :端點 C :端點 D :端點 11Schematic diagram of the self-excited electronic safety system. The self-excited electronic ballast is similar to a self-excited electronic ballast, but the difference is that the self-excited electronic ballast has a protective circuit that contains a coil. The debt measuring coil 290 and the other coils are wound on the same core. Therefore, the detecting coil 2 detects the voltage of the control coil, and then rectifies the accumulated voltage by using the full-wave rectifier 26〇 to output the detection voltage. The protection circuit of the self-feeding electronic device 1〇〇〇 is similar to the protection circuit of the self-excited electronic ballast, so its advantages are also the same, so it will not be described here. . Referring to Fig. 12, a schematic diagram showing the circuit of the self-excited electronic safety device 1100 according to the tenth embodiment of the present invention is shown. Self-excited electronic ballast The biliary system is similar to a self-excited electronic ballast, but the difference is that the protection circuit of the self-excited electronic ballast 1100 further includes a measuring coil 29〇. The proof coil 290 and the other coils are wound on the same core, so the detecting coil 290 can detect the voltage of the control coil, and then use the half-wave rectifier to rectify the extracted voltage to output the detection voltage. The protection circuit of the self-excited electronic ballast U〇〇 is similar to the protection circuit of the self-excited electronic ballast 4, so the advantages are the same, so it will not be described here. Referring to Fig. 13, there is shown a circuit diagram of a self-excited electronic ballast 12 according to an eleventh embodiment of the present invention. The self-excited electronic ballast 1200 is similar to the self-excited electronic ballast 11 but differs in that the self-excited electronic ballast 1200 is a half bridge electronic ballast. The protection circuit of the self-excited electronic ballast 1200 is similar to the protection circuit of the self-excited electronic ballast 1100, so the advantages are the same, and therefore will not be described herein. Please refer to FIG. 14, which is a circuit diagram of a self-excited electronic ballast i300 according to a twelfth embodiment 18 200913791 of the present invention. The self-excited electronic ballast 1300 is similar to a self-excited electronic ballast, but the self-excited electronic ballast 1300 is a self-excited half-bridge electronic ballast. The protection circuit of the self-excited electronic ballast 1300 is similar to the protection circuit of the self-excited electronic ballast 1000, so the advantages thereof are also the same, and therefore will not be described herein. Referring to Figure 15, there is shown a circuit diagram of a self-excited electronic ballast M00 according to a thirteenth embodiment of the present invention. The self-excited electronic ballast 1400 is similar to the self-excited electronic ballast 7 〇〇, but the difference is that the protection circuit of the self-excited electronic ballast 1400 further includes a balanced capacitor 299. The first end of the control coil 234 is electrically connected to the first end of the control coil 226, and the balance capacitor 299 is electrically connected between the second end of the control coil 226 and the full-wave rectifier 260. The balancing capacitor 299 is electrically connected between the control coil 226 and the full-wave rectifier 260 to balance the duty of the switches 22〇, 228, 226, and 232 to avoid the offset of the current flowing into the full-wave rectifier 260. Week* (duty). Although the present embodiment only shows that the balancing capacitor 299 is electrically connected between the second end of the control coil 226 and the full-wave rectifier 260, it is not limited thereto. The balancing capacitor 299 can also be electrically connected between the second end of the control coil 234 and the full-wave rectifier 26A, so that the same effect can be obtained. Referring to Fig. 16, there is shown a circuit diagram of a self-excited electronic ballast 15GG according to a fourteenth embodiment of the present invention. The self-excited electronic ballast 1500 is similar to the self-excited electronic ballast 7〇〇, but the difference is that the electronic ballast measurement includes full-wave rectifier tick. The full-wave rectifier is electrically connected to both ends of the control coil 226, and (4) after the switch 268 is turned on, 19 200913791 The full-wave rectifier 360 shorts the control coil 226. Since the operation mode and advantages of the self-excited electronic ballast 1500 are similar to those of the self-sustaining electronic ballast, it will not be repeated here. In addition, it is worth mentioning that the full-wave rectifier 3 can also be used in the electronic ampoule proposed in other embodiments of the present invention. While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to be limited to the present invention, and it is to be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more apparent and understood. The figure shows the circuit diagram of a conventional self-excited half bridge electronic ballast. The second drawing shows the circuit schematic of another conventional self-excited electronic ballast. Figure 3 is a circuit diagram showing a self-excited electronic ballast in accordance with a first embodiment of the present invention. Figure 4 is a circuit diagram showing a self-excited electronic ballast in accordance with a second embodiment of the present invention. Fig. 5 is a circuit diagram showing a self-excited electronic ballast according to a third embodiment of the present invention. The figure is a circuit diagram of a self-excited electronic ballast according to a fourth embodiment of the present invention. 20 200913791 Figure 7 is a schematic diagram of a circuit of a self-exciting ballast not according to a fifth embodiment of the present invention. Figure 8 is a circuit diagram showing a self-excited electronic ballast in accordance with a sixth embodiment of the present invention. Figure 9 is a circuit diagram showing a self-excited electronic ballast according to a seventh embodiment of the present invention. Fig. 10 is a circuit diagram showing the self-excited electronic ballast according to the eighth embodiment of the present invention. Figure 11 is a circuit diagram showing the self-excited electronic ballast according to the ninth embodiment of the present invention. Fig. 12 is a circuit diagram showing a self-excited electronic ballast according to a tenth embodiment of the present invention. Figure 13 is a circuit diagram showing the self-excited electronic ballast according to the eleventh embodiment of the present invention. Fig. 14 is a circuit diagram showing a self-excited electronic ballast which is not according to the twelfth embodiment of the present invention. Fig. 15 is a circuit diagram showing the self-excited electronic ballast of the thirteenth embodiment of the present invention. Figure 16 is a circuit diagram showing a self-excited electronic ballast according to a fourteenth embodiment of the present invention. [Main component symbol description] 22: Converter 26: Upper arm switch 30: Lower arm switch 24: Upper arm switch control coil 28: Lower arm switch control coil 32: Load 21 200913791 40: Resonant capacitor 2: Electronic ballast 210: AC power supply 211: rectifier 212: load 214: starting resistor 216: starting capacitor 218: AC switching element 219: discharge diode 220: switch 222: control coil 223: voltage limiter 224: switch 226: control coil 227: voltage limiting 228: switch 230: control coil 231: voltage limiter 232: switch 234: control coil 236: voltage limiter 238: steering control coil 240: resonant inductor 242: filter DC capacitor 244: resonant capacitor 260: full-wave rectifier 262: Time adjustment circuit 262a: resistor 262b: capacitor 262c: resistor 264: time adjustment circuit 264a: capacitor 264b: resistor 266: start circuit 268: switch 280: half-wave rectifier 290: detection coil 299: balance capacitor 360: full-wave rectifier 300 : Self-excited electronic ballast 400: Self-excited electronic ballast 500: Self-excited electronic ballast 600: Self-excited electronic ballast 700: Self-excited electronic ballast 800: Self-excited electronic ballast 900: Self-excited electronic ballast 1000: Self-excited electronic ballast 1100 · Self-excited electronic ballast 1200: Self-excited electronic ballast 13 0 0. Self-excited electronic stability 1400 : Self-excited electronic ballast 1500 · Self-excited electronic ballast A: End point B: End point C: End point D: End point 11