1258162 九、發明說明： 【發明所屬之技術領域】 本發明是有關於-種電子安定器，特別是有關於一種 具有均流效果之三相式電子安定器。 【先前技術】 近年來光電相關技術不斷地推陳出新，各種電子裝置 的數位化趨勢’擴大了顯示面板的技術層次以及應用範 圍，使得常見的顯示面才反的種類從以往僅有的陰極射線管 ”、、貝示幕又坫加了液晶顯示面板以及電漿顯示面板等等。 其中由於這些冑式顯示面板與陰極射線管顯#幕在顯示原 理上有很大的不同，所以能夠輕易地達到高晝質、體積小、 重量輕、驅自電壓低以及消耗功率低等優點，更加地適用 於個人數位助理（pers〇nal digital assistant，叩八）、行動電 話、攝錄放影機、筆記型電腦、電視等消費性通訊及電子 產品上，因此，有逐漸取代陰極射線管顯示幕而成為顯示 器主流的趨勢。 但由於液晶顯示器是屬於非自體發光的顯示裝置，因 此而要有其他的辅助光源來協助其顯示影像，也就是一般 所稱的背光源。由於目前液晶顯示器的發展趨勢是朝向大 尺寸發展，所以常使用多個冷陰極燈管（cold⑽hoh flu0rescent iamp)或是多個發光二極體（led)等光源負載來 做為大尺寸液晶顯示器的背光源。 一般而言，背光源的均勻度和高亮度對液晶顯示器所 5 1258162 產生的視覺效果來說是極為重要的，因此為達到良好的領 示效果，目前大多以多光源負載的方式來設計液晶顯示器 2背光源，這也就是說，當液晶顯示器的尺寸面積越大時， 为光源所需要的光源負載也越多，因而隨之產生一些問題。 由於在具有多光源負載的光源電路中，每個光源負載 之間在特性（如阻抗特性）上的不同，以及其他每個電路元件 (如電—感及電容)之間的差異，都會造成通過每一光源負載的 電流量不盡相同’進而造成顯示畫面亮度的不均勾。 、目：具有-些均等通過每一光源負載之電流量的方 法，但每些方法大都是透過外加的控制電路來加以達成。 但外加控制電路的加人會增加背光源電路整體的體積以及 成本’而且其均流效果也不見得料理想，例如，外加控 制電路的加人會使均流電路中的元件在設計上更加不易f 在電路操作頻率有所變動之下便會失去均流效果，以及在 光源負載之阻抗特性變動的情況下亦會失去均流效果。 因此，若能夠在背光源電路中，以更簡單及更有效的 方式，均等流經每一光源負載的電流’使流經每一燈管的 電流量無論在何種外在環境條件下皆能維持在一定值，則 液晶顯示器的背光源便能散發出更為均句以及更為光亮的 光源’背光源的發光效率以及使用壽命也能隨之提高。 【發明内容】 因此本發明的主要目的就是在提供一種用以同時均流 多個光源負載之三相式電子安定哭。 1258162 本發明的另一目的就是在提供一種低電路元件數量以 及低製造成本之三相式電子安定器。 本發明的再一目的就是在提供一種能夠不受電路之操 作頻率影響之三相式電子安定器。 本發明的更一目的就是在提供一種能夠不受光源負載 之阻抗特性影響之三相式電子安定器。 為達到本發明之上述目的，符合本發明之一實施例之 二相式電子安定器包含有一三相電壓驅動電路、三變壓 為、三諧振電路。其中，三相電壓驅動電路係用以將一直 流電壓源所提供之直流電壓切換為三相電壓，並將此三相 電壓提供給該三變壓器。此三變壓器的第一次側係以三角 接法（deltaconnection)互相連接，並分別用以接收三相電壓 驅動電路所提供之三相電壓#中之一…卜，三變壓器的 第二次側係以Y接法（Yconnecti〇n)互相連接，此三變壓器 j第二次側皆會提供一輸出電壓給一負載，但每一輸出電 壓在輸出之前皆須為—諧振電路㈣波，使輸出電壓的波 形為一正弦波。 "在上述的電路之中，因為該三變壓器之第一次側及第 朴人側係互相呈現三角—γ接法（deha_Y⑶ηηαΗοη)，所以 — 角γ接法的特性以及實驗結果可知，此種電路能 夠在每一負載上達到良好的均流效果。 【實施方式】 由於般之二相式電子安定器為各個燈管負載所提供 7 1258162 之電流值容易受電源品質或負載老化等外在因素而變得不 ' 穩定，造成流經每個光源負載上的電流值會有所不同，進 而使每個光源負載的亮度不一致。因此本發明之基本概念 係將三相式電子安定器中的各個變壓器互相以三角一 γ接 法（delta-Y connection)連接，藉由三角—γ接法的特性可均 等流經每一光源負載上的電流，並且不須外加的控制電路。 第1圖繪示了符合本發明概念之一三相式電子安定器 • 1〇0之電路架構圖。在此架構中，係使用一三相電壓驅動^ 路102來提供電路中所需要的三相電源，此三相電壓驅動 電路102會接收一直流電壓Vdc，並將直流電壓γ%轉換 為交流電壓並輸出，其中三相電壓驅動電路1〇2所輸出的 二相交流電壓一般會是三相交流方波電壓。 由三相電壓驅動電路102所輸出之三相電壓會 入-三角-Y變壓器電路丨。4之中。其中三角—γ = 電路104係由多個變壓器所組成，這些變壓器的第一次側 Λ t以三角接法互相連接’以及第二次側會以γ接法互相連 接。也就是說’三角一 γ變壓器電路1〇4會先以使用三角 - 接法的第一次側來接收三相電壓驅動電路102所輸出的三 相電壓’再以使用γ接法的第二次側來輸出這些三相； 壓。依據三角-Y接法的電路特性以及實驗結果可知，由 三角-Y變壓器料104所輸出的每一相電壓大小 常平均。 3 由於三相電壓驅動電路102所輸出的交流電壓一般备 是三相交流方波電壓，所以由三角—γ變壓器電路104戶; 8 1258162 輸出的三相電壓一般也會是三相交流方波電壓。因此，由 三角一 Y變壓器電路104所輸出的每一相方波電壓還須為 一諧振電路106濾波成為一正弦電壓，才能供光源負載 使用。同樣依據三角一Y接法的電路特性以及實驗結果也 可發現流經光源負載108的每一相電流的電流大小也都會 相當穩定並且一致。 胃 依據於第1圖當中所提到的電路架構，在第2圖綠示 了符合本發明之-實施例之三相式電子安定器的電路f 此電路中的三相電壓驅動電路包含了六個開關元件（如場 效電晶體FET)，即一第一開關元件心、—第二開關元件 -第三開關元件S3、一第四開關元件S4、一第五開關元； S5以及一第六開關元件s0。每一個開關元件都具有—第— 連接端、-第二連接端以及一控制端，其中第一開關元件 S!、第三開關元件s3以及第五開關㈣§5的第—連接端备 連接在-起，用以接收直流電壓VDC的之正電位，而第二 開關元件82、第四開關元件S4以及第六開關元件S6的第： 連接端會連接在-起，用以接收直流電壓vDe的之負電^ 另夕卜，第:開關元件81、第三開關元件S3以及第五開關元 件5的弟一連接端會分別與第二開關元件S2、第四 件S4以及第六開關元件心第一連接端連接。 汗70 在本電路中會有另外一控制電路（未綠示於圖中） H、開關兀件的控制端’用以控制該六開關元 與截止。因此，控制電路適當的控制 *、 壓切換為三相方波電壓，其中該三相電二=直流電 电缓會分別輸出於第 1258162 開關元件s i與第二開關元件之連接點、第三開關元件 S3與第四開關元件心之連接點以及第五開關元件s5與第六 ，關元件s0之連接點。在本實施例中，第一開關元件 第三開關元件S3以及第五開關元件S5在切換時互相會有 20度的相位差，第二開關元件S2、第四開關元件心以及 第/、開關tl件S6在切換時互相亦會有12〇度的相位差，而 第-開關元件Sl與第二開關元件S2之間、第三開關元件 S3與第四開關元件§4之間以及第五開關元件、與第六_ 兀件S0之間在切換時皆會有18〇度的相位差。 ▲著在本只她例中’二角- Y變壓器電路係由一第一 變壓器Tl*i、一第二鐵厭哭τ 一夂i Tr2以及一第三變壓器τ 變=所組成，每-變壓器係用以處理三相變壓驅動電； 電壓其中第一變壓器h之第 、 弟一士 ΤΓ2之第一次側Np2以及第三變壓器丁。之第一 次側ΝΡ3會互相以三角接法連接在—起，並且每一第一次 側皆會接收二相變壓驅動電路所輸出之—相電壓。 也就是說，第一次側Npl的兩端會 …第二連接端以及第三開關 二 接，第-次側NP2的兩端會分別血 二弟：連接如連 連接端以及第五開關元件Ss的第1: 3的弟- NP3的㈣會分別與第五開關元件 # -開關元件S,的第二連接 5的弟-連接端以及第 另外，為了^ 以形成一三角接法。 Τι·以及第51阻隔流入第—變壓器Tri、第二變壓器 2 —器Tr3的直流成分，以避免變壓器的飽 10 1258162 和，可在第-次側Νρι與第—開“件&之第二連接端之 間次側nP2與第三開關元件S3之第二連接端之間以 及弟一次側nP3與第五開關元件心之第二連接端之間分別 串聯一第-隔離電容Csi、—第二隔離電容^以及一第三 隔離電容Css，以達到此效果。 户另外帛壓益Tr】之第二次側Ns】、第二變壓器扣 之第二次側Ns2以及第三變壓 以Y接法連接在—起，Γ弟—次側NS3會互相 並且母一弟一次側皆用以輸出一輸 出電壓給光源負載。 N合也右沈一是:兒’第二次側…1、第二次側仏2以及第二次側 曰合右—端互相連接在—起，以形成¥接法中的中性點， 、义曰有二先源負載（即本例中的燈管負載Rlamp】、Rlamp2 =NmP3)會分_第二次側％、第二次側NS2以及第 一-人側Ns3並聯，以接收第一 以及第三變壓器Tr3所J之二…1、弟二_- 所分第1側叫、第二次側…2以及第二次側NS3 波：正;;J電广樣皆為方波電壓，故須為諧振電路濾 壓後才能供應給各個負載使用。在本實施例 以及：― 弟—諧振電容CP1、-第二諧振電容CP2 ^二職電容％與第二次侧％、第二次側叫以 漏電:人並聯。其中，因為在變壓器當中都會具有 路：第：厂此漏電感便可與該並聯電容形成-諸振電 容步成：ΓΓΤγι為例，即漏電感Lsi會與第-諧振電 成1振電路’將第二次側％所輸出之方波電壓遽 1258162 二 =ΐ::塵供燈一管負載Κ—Ρ,使用’並且若能狗將第 抗匹配的話，則能夠得到更好的均流效果。同：值 第一：振電谷CP2與第二變壓器丁。之漏電感LS2的配人， 以及第三諧振電容C 一 〇 “CP3與弟二.…Tr3之漏電感Ls3的配 5白有者相同的作用。 一 μ Ϊ 3圖胥不了上述之三相式電子安定器所可能具有的 一也變化形式。例如，依據實驗結果，當每-相之輸出電 壓係用以提供較多的燈管負載使用時，本電路— 良^的均，效果，如圖所示，可由第—變㈣h提:輸出 電壓給燈管負载Rlampi及R — 4，第二變壓器％提 出電壓給燈管負載Rlamp2及R—5以及第三變壓器丁:： 供輸出電壓給燈管負載心邮3及Rlamp6。 3 再者，由於不同種類的光源負載具有{同的阻抗特 I" 口此若所使用的光源負載具有負增量電阻特性時，可 多利用-補償電容與光源負載串聯以降低該光源負 增量電阻特性’如圖所示U償電容cbi、第二補償電 容Cb2以及第三補償電容Cb3。 最後，在第2圖中，第二欠側％、％以及％之一 端會互相連接，以形成Y接法t中的中性點。但若將第二 次側NS]、叫以纟价3之_端同時連接至驅動電路之一: 地端時，亦可得到相同效果’亦即Y接法當中的中性點也 可為電路中的接地點。 雖然本發明已以多個較佳實施例揭露如上，然其並非 12 1258l62 =限定本發明，任何㈣此技藝者，在不脫離本發明之 範圍内，當可作各種之更動與潤飾，因此本發明之 、蔓範圍§視後附之申請專利範圍所界定者為準。 【圖式簡單說明】1258162 IX. Description of the Invention: [Technical Field] The present invention relates to an electronic ballast, and more particularly to a three-phase electronic ballast having a current sharing effect. [Prior Art] In recent years, optoelectronic related technologies have been continuously introduced, and the digitalization trend of various electronic devices has expanded the technical level and application range of display panels, making the common display surface the only type of cathode ray tube. And the display screen has added a liquid crystal display panel, a plasma display panel, etc. Among them, since these display panels and cathode ray tube display screens are greatly different in display principle, they can be easily reached high.昼 〇 〇 digital digital digital digital 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 On the consumer communication and electronic products such as television, there is a tendency to gradually replace the cathode ray tube display screen and become the mainstream of the display. However, since the liquid crystal display is a non-self-luminous display device, other auxiliary light sources are required. To assist in the display of images, which is commonly referred to as the backlight. Because of the current liquid crystal display The trend is toward large-scale development, so multiple cold cathode lamps (cold(10)hoh flu0rescent iamp) or multiple light source loads (LEDs) are often used as backlights for large-size liquid crystal displays. The uniformity and high brightness of the backlight are extremely important for the visual effect produced by the liquid crystal display 5 1258162. Therefore, in order to achieve a good guiding effect, the liquid crystal display 2 backlight is mostly designed by multi-light source loading. That is to say, when the size of the liquid crystal display is larger, the more light source load is required for the light source, and thus some problems arise. Since in the light source circuit having multiple light source loads, each light source is loaded. The difference in characteristics (such as impedance characteristics) and the difference between each other circuit component (such as electrical-sensing and capacitance) will cause the amount of current through each light source load to be different. Uneven hooks., Objective: There are ways to equalize the amount of current through each source, but each method is mostly transparent. The addition of the control circuit is achieved. However, the addition of the control circuit increases the overall volume and cost of the backlight circuit' and its current sharing effect is not ideal. For example, the addition of the control circuit may cause the current sharing circuit. The components in the design are more difficult to design. When the operating frequency of the circuit is changed, the current sharing effect is lost, and the current sharing effect is also lost when the impedance characteristics of the light source load are changed. Therefore, if the backlight is available In a circuit, in a simpler and more efficient manner, the current flowing through the load of each light source is equal to 'the amount of current flowing through each of the lamps can be maintained at a certain value regardless of the external environmental conditions, and the liquid crystal The backlight of the display can emit a more uniform sentence and a brighter light source. The luminous efficiency and lifetime of the backlight can also be improved. SUMMARY OF THE INVENTION Therefore, the main object of the present invention is to provide a simultaneous Three-phase electronically stable crying with multiple light source loads. 1258162 Another object of the present invention is to provide a three-phase electronic ballast having a low number of circuit components and a low manufacturing cost. It is still another object of the present invention to provide a three-phase electronic ballast that is immune to the operating frequency of the circuit. A further object of the present invention is to provide a three-phase electronic ballast that is immune to the impedance characteristics of the light source load. In order to achieve the above object of the present invention, a two-phase electronic ballast according to an embodiment of the present invention comprises a three-phase voltage driving circuit, a three-variable voltage, and a three-resonance circuit. The three-phase voltage driving circuit is configured to switch the DC voltage provided by the DC voltage source to a three-phase voltage, and provide the three-phase voltage to the three transformers. The first side of the three transformers are connected to each other by a delta connection, and are respectively used to receive one of the three-phase voltages provided by the three-phase voltage driving circuit, and the second side of the three transformers. Connected to each other by Y connection method (Yconnecti〇n), the second side of the three transformers j will provide an output voltage to a load, but each output voltage must be - resonant circuit (four) wave before the output, so that the output voltage The waveform is a sine wave. " In the above circuit, since the first side of the three transformers and the side of the Pakren side exhibit a triangular-gamma connection (deha_Y(3) ηηαΗοη), the characteristics of the angle γ connection method and experimental results show that The circuit achieves a good current sharing effect on each load. [Embodiment] Since the current value of the 7 1258162 provided by the two-phase electronic ballast for each lamp load is easily unstable due to external factors such as power quality or load aging, it flows through each light source load. The current values will vary, resulting in inconsistent brightness for each source load. Therefore, the basic concept of the present invention is to connect the transformers in the three-phase electronic ballast to each other by a delta-Y connection, and the characteristics of the triangle-gamma connection can equally flow through each light source load. Current on, and no additional control circuitry. Figure 1 is a circuit diagram of a three-phase electronic ballast in accordance with the concept of the present invention. In this architecture, a three-phase voltage drive circuit 102 is used to provide the three-phase power required in the circuit. The three-phase voltage drive circuit 102 receives the DC voltage Vdc and converts the DC voltage γ% into an AC voltage. And output, wherein the two-phase AC voltage output by the three-phase voltage driving circuit 1〇2 is generally a three-phase AC square wave voltage. The three-phase voltage outputted by the three-phase voltage driving circuit 102 is input to the delta-Y transformer circuit. 4 in. The triangle-γ = circuit 104 is composed of a plurality of transformers, the first side of which is connected to each other by a delta connection and the second side is connected to each other by a gamma connection. That is to say, the 'triangle-gamma transformer circuit 1〇4 will first receive the three-phase voltage output by the three-phase voltage driving circuit 102 using the first side of the triangulation-connection method, and then use the second time using the gamma connection method. Side to output these three phases; pressure. According to the circuit characteristics of the triangular-Y connection method and the experimental results, the voltage of each phase outputted by the triangular-Y transformer material 104 is normally averaged. 3 Since the AC voltage output by the three-phase voltage driving circuit 102 is generally a three-phase AC square wave voltage, the three-phase voltage output by the triangular-gamma transformer circuit 104; 8 1258162 is generally a three-phase AC square wave voltage. . Therefore, the square wave voltage of each phase outputted by the triangular-Y transformer circuit 104 must also be filtered by a resonant circuit 106 into a sinusoidal voltage for use by the light source load. Also based on the circuit characteristics of the delta-Y connection method and the experimental results, it is also found that the current of each phase current flowing through the source load 108 is also relatively stable and consistent. According to the circuit structure mentioned in FIG. 1, the circuit of the three-phase electronic ballast according to the embodiment of the present invention is shown in FIG. 2, and the three-phase voltage driving circuit in the circuit includes six Switching elements (such as field effect transistor FET), namely a first switching element core, a second switching element - a third switching element S3, a fourth switching element S4, a fifth switching element; S5 and a sixth Switching element s0. Each of the switching elements has a first connection terminal, a second connection end, and a control terminal, wherein the first connection element S!, the third switching element s3, and the fifth switch (four) § 5 are connected at the first end And a positive potential for receiving the DC voltage VDC, and the second: the second switching element 82, the fourth switching element S4, and the sixth switching element S6 are connected to each other for receiving the DC voltage vDe. Negative power ^ In addition, the first connection end of the switching element 81, the third switching element S3, and the fifth switching element 5 will be first with the second switching element S2, the fourth piece S4, and the sixth switching element, respectively. The connection is connected. Khan 70 There is another control circuit in this circuit (not shown in the figure). H. The control terminal of the switch element is used to control the six switch elements and cut off. Therefore, the control circuit appropriately controls *, and the voltage is switched to a three-phase square wave voltage, wherein the three-phase electric two-direct current electric power is outputted respectively at the connection point of the 1258162 switching element si and the second switching element, and the third switching element S3 a connection point with the fourth switching element core and a connection point of the fifth switching element s5 and the sixth, the closing element s0. In this embodiment, the first switching element, the third switching element S3 and the fifth switching element S5, have a phase difference of 20 degrees with each other when switching, the second switching element S2, the fourth switching element core, and the /, switch tl The pieces S6 also have a phase difference of 12 degrees from each other when switching, and between the first switching element S1 and the second switching element S2, between the third switching element S3 and the fourth switching element §4, and the fifth switching element. There will be a phase difference of 18 degrees between the sixth _ and the S0. ▲In this case, the 'two-angle-Y transformer circuit is composed of a first transformer Tl*i, a second iron-disgusting τi夂i Tr2 and a third transformer τ=, each transformer It is used to process three-phase transformer drive power; the voltage of the first transformer h, the first side of the first one Np2 and the third transformer. The first side turns 3 are connected to each other by a delta connection, and each of the first side receives the phase voltage output by the two-phase transformer drive circuit. That is to say, the two ends of the first side Npl will be connected to the second connection end and the third switch, and the two ends of the first-stage side NP2 will respectively be blood two brothers: a connection such as a connection terminal and a fifth switching element Ss The first 1:3 brother - NP3 (four) will be connected to the fifth switch element # - switch element S, the second connection 5 of the second connection 5 and the other, in order to form a triangle connection. Τι· and the 51st block flow into the DC component of the first transformer, the second transformer 2, and the Tr3, to avoid the saturation of the transformer 10 1258162 and can be used in the first-side Νρι and the first-opener & second a first-isolation capacitor Csi, a second connection between the secondary side nP2 and the second connection end of the third switching element S3, and the second connection end of the fifth side of the fifth switching element The isolation capacitor ^ and a third isolation capacitor Css are used to achieve this effect. The second side Ns of the second voltage transformer Tr], the second side of the second transformer buckle Ns2, and the third transformer voltage are connected by Y Connected in, the younger brother - the secondary side NS3 will be mutually and the first side of the mother is used to output an output voltage to the light source load. N is also right sinking one: the child's second side...1, the second time The side sill 2 and the second side splicing right-end are connected to each other to form a neutral point in the splicing method, and the scorpion has two pre-source loads (ie, the lamp load Rlamp in this example), Rlamp2 = NmP3) will be divided into _ second side%, second side NS2 and first-human side Ns3 in parallel to receive the first The first and third transformers Tr3 are two of the two...1, the second two are divided into the first side, the second side...2 and the second side NS3 wave: positive;; J electric wide sample is square wave voltage Therefore, it must be filtered for the resonant circuit before it can be supplied to each load. In this embodiment and: - brother - resonant capacitor CP1, - second resonant capacitor CP2 ^ second job capacitance % and second side %, second time The side is called leakage: people are connected in parallel. Among them, because there are roads in the transformer: the factory: the leakage inductance can be formed with the parallel capacitor - the vibration capacitance step is: ΓΓΤ γι as an example, that is, the leakage inductance Lsi will be the first Resonant electric into a vibration circuit 'The square wave voltage outputted by the second side% 遽1258162 II=ΐ::The dust supply lamp is loaded with a tube Κ-Ρ, using 'and if the dog can match the first resistance, then Get better current sharing effect. Same as: value first: vibrating valley CP2 and second transformer D. The leakage inductance LS2 is matched, and the third resonant capacitor C is the same as "CP3 and brother II....Tr3 leakage The sense of Ls3 is the same as that of the white one. A μ Ϊ 3 diagram does not represent a variation of the three-phase electronic ballast described above. For example, according to the experimental results, when the output voltage of each phase is used to provide more lamp load, the circuit - good, the effect, as shown in the figure, can be mentioned by the first - (4) h: output voltage For the lamp load Rlampi and R-4, the second transformer % proposes voltage to the lamp load Rlamp2 and R-5 and the third transformer D:: for the output voltage to the lamp load heart 3 and Rlamp6. 3 Furthermore, since different types of light source loads have {same impedance characteristics I", if the light source load used has a negative incremental resistance characteristic, the compensation capacitor can be used in series with the light source load to reduce the negative increase of the light source. The quantity resistance characteristic 'is shown by the U compensation capacitance cbi, the second compensation capacitance Cb2, and the third compensation capacitance Cb3. Finally, in Fig. 2, one of the second underside %, %, and % ends are connected to each other to form a neutral point in the Y connection t. However, if the second side NS] and the _ end of the 纟3 are simultaneously connected to one of the driving circuits: the ground end, the same effect can be obtained, that is, the neutral point in the Y connection can also be a circuit. The grounding point in the middle. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of the present invention can be modified and retouched without departing from the scope of the invention. The scope of the invention is defined by the scope of the patent application. [Simple description of the map]
At為讓本發明之上述和其他目的、特徵、優點與實施例 月匕更明顯易懂’所附圖式之詳細說明如下·· 第1圖為符合本發明實施例之三相式電子安定器之架 構圖。 第2圖為符合本發明之一實施例之三相式電子安定器 之電路圖。 第3圖為符合本發明另一實施例之三相式電子安定器 之電路圖。 【主要元件符號說明】 100 ·•三相式電子安定器 104·二角—γ變壓器電路 1()8 =負載The above is a more detailed description of the above and other objects, features, advantages and embodiments of the present invention. The detailed description of the drawings is as follows. Figure 1 is a three-phase electronic ballast in accordance with an embodiment of the present invention. Architecture diagram. Fig. 2 is a circuit diagram of a three-phase electronic ballast in accordance with an embodiment of the present invention. Fig. 3 is a circuit diagram of a three-phase electronic ballast in accordance with another embodiment of the present invention. [Main component symbol description] 100 ·•Three-phase electronic ballast 104·Two-angle-γ transformer circuit 1()8=Load
Sl :第一開關元件 S3 :第三開關元件 I :第五開關元件Sl: first switching element S3: third switching element I: fifth switching element
Tri :第一變壓器Tri : First transformer
Tr3:第三變壓器 102 :三相電壓驅動電路 106 :諧振電路 VDC :直流電壓 S2 ··第二開關元件 S4 :第四開關元件 S6 :第六開關元件 Tr2 :第二變壓器 Npi-Np3 :第一次側 13 1258162 NSl-Ns3 :第二次側 Cs!:第一隔離電容 Cs3 :第三隔離電容 Cp2 :第二諧振電容 Cb!:第一補償電容 Cb3 :第三補償電容 LSi_LS3 ·漏電感 Cs2 :第二隔離電容 CPl :第一諧振電容 Cp3 :第三諧振電容 Cb2 :第二補償電容 Rlampi-Rlamps :燈管負載Tr3: third transformer 102: three-phase voltage driving circuit 106: resonant circuit VDC: direct current voltage S2 · second switching element S4: fourth switching element S6: sixth switching element Tr2: second transformer Npi-Np3: first Secondary side 13 1258162 NSl-Ns3 : Second side Cs!: First isolation capacitor Cs3: Third isolation capacitor Cp2: Second resonance capacitor Cb!: First compensation capacitor Cb3: Third compensation capacitor LSi_LS3 · Leakage inductance Cs2: Second isolation capacitor CP1: first resonance capacitor Cp3: third resonance capacitor Cb2: second compensation capacitor Rlampi-Rlamps: lamp load
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