1326565 九、發明說明： 【發明所屬之技術領域】 本判俩D辩細紐錢絲奸较輯兩組降 =式功因改善電路整合成單-級，並共用主動墟_，以減 少控制電軸_元件數，且將魏之絲_操作於零電壓斑 =流切換導通情況，以減少_树切換損失以達到高效率的 【先前技術】 電子安定n大乡是聽賴妓為 功率半導體元件為開關，作高頻的切換動作，提供營光=載= 電源。D類串並聯共__子___ 早、效率^適合高聽作、魏錢接虹 值嶋峨點，因而被大多__採用。_= 振式螢光《子安定將採自激或外激之驅動方絲娜里主動 _=自激式摘取負載電流回授自行產生驅動信號，不需額外控 ㈣路:成她。_，自蝴子安技自规天上的限 • 制’不谷易達到向功因、調光、預熱控制等功能。 •第一圖所示’為一般市面上所最常見的半橋結構之D類串並聯 共振式螢光燈電子安定器驅動螢光燈的電路結構。主要利用兩组直 流電源提供能量給D類串並聯共振式螢光燈電子安定写，缺後串並 聯共振式電子安定器再做高頻切換來驅動營光燈負载，該電路 是由兩支串聯的螢光燈管所構成，串聯共振部分由電感。與電容 Cs所組成，並聯共振部分包含電容Cp、與⑶，其中燈絲電 5 流只通過Cfl與Cf2。理論上，兩個主動開關S1與S2具有相同 的導通時間’因此共振電路的輸入電麼不存在直流成分，但由於 元件上的差異與考量電路參數的變化，直流成分有可能存在於共 振包路中’因此需要利用電容Cs來濾除共振電路中所存在的直流 成分。 利用兩組半波整流電路可以提供第一圖所需的直流電壓源，若 在半波整流電路後方再加上兩崎雜式職器，配合適當得電 路參數設計與絲關元件切換時間㈣，不僅可以提供穩定的 直流電Μ源，並且也將具有拥修正的效果，如第二圖所示。第 二圖中有兩組降升壓式轉換H，其中的降升壓式轉換器丨經由整 流二極體D3將交流輸人電源的正半波轉換成直流電壓；降升麼式 轉換器II，經由整流二極體D4將交流輸入電源的負半波轉換成直 流電壓’此雙級的安定H需要兩組控制電路，分別控制兩組降升 壓式轉換ϋ與D類串並聯共振式換流器，且主觸_數目多達 四個’攻種雙級的架構需要兩次功率轉換的過程，增加切換損失 和額外的傳導損失，使得整_電路效舞低；而且，需要兩組 控制電路分別驅動功因修正電路與共振式換流I額外增加的抑 制電路和切換元件使得電路結構複雜化，成本也姉提高。對= 低單價、成本敏感的電子安定器而言，並不利於其產品的市場競 爭力。 【發明内容】 本發明之主要目的係在提供一具有電路構造簡單、控制容 易、可提高效率並降低成本之縣燈電子安定器。 本發明之主要特徵是在被動遽波器之輪出端並接兩組降升 =轉換器，其每—組降升壓馳中各設有兩二極體、-主動開 =、儲能電感與直流鏈電容所組成；且利用每—組降升壓轉換哭 2主動_與直流鏈電容與共振電路形成—D類串並聯共 螢光燈電子安定器。 【實施方式】 聰狀觀手段，茲 舉出較佳可狀實施例，並配合圖式所示詳加說明如下： 本發明係保存降升壓式轉換器與D類共振換流器的特性與優點， 單級高功因D_«共振式螢級f子安⑽，電路結構 7&兩組降升壓轉換器與D類共振換流器。整合的過程是人 ，圖中_的開關&與開關V開關从開關如，並重新安排電感 Γ極體认和认位置，得到第三圖之單級高功因D類串並聯 /、振式螢光燈電子安定11，整合後的電m組控概路及兩個 主動開關，控制電路_脈波寬度調變的控制方式，朗定主動開關 的切換頻率與責任週期。由於兩組降升壓式轉換器的儲能電感分別負 貝輸入電源的半個週期，不會同時有電流流過，因此，實際電路是利 用-個鐵心和兩組繞線來製作電感‘與^。缝開關元件兄及& 為雙向導通開關，可以使用聰FET，其基底韻間的二極體可用來 作為A和/¾ ’毋需額外並聯二極體。因此，與其它單級高功因登光燈 電子女疋②電路相比較’本發明所提出的單級〇_並聯共振式高功 因螢光燈電子安定㈣財的二極體數目很瞧地大為減少了，其中 減少的二極體，部分是快速二鍾。所以，將使得本研究計畫的電路 在1本上更具有競爭力。另外’電路巾的被動紐m 以及電容 g是用來消轉鋪的高㈣流成份，使輸人電流呈低頻卿z)的正 弦波。 —為/證實整合後賴型單級高功因D辭朗舰式螢光燈電子 女疋益的可行性，本發明將以兩支串聯的赛螢光燈為設計實例，分 ^電路的操作原理與轉模式，彻基本波分析法推導電路方程式: j電路巾的各項參數，使兩崎升壓轉㈣皆操作料連續電流導 通=式’⑽D_並聯共振式螢光燈電子安定n設計於零電壓與零 電流切換導通操作情況下，以_高功因、波、低切換損失盘高 第三圖的單級高功因D類串並聯共振式螢光燈電子安定器具有對 稱性的電路結構，主動關必財相_工作獅，因此，必 須採用對稱脈波寬度調變來控綱關.&，主動開_觸發信號如 第四圖所7F ’ bb為開關⑦、02的閘極電壓，其脈波寬度相等 ^補’陰影部分為怠遲時間，在怠遲時間内&、^均為低電位， 备思遲時間增加時，脈波寬度減少，怠遲時間不能為零，以防止開關 .仏同時導通。圖中&為^&的責任週期，^義為脈波&度 與工作週期的比值。 ’又 …安定㈣路結構與㈣電路紐雛，對於輸人電源而言，其正 半週與負半週的卫作模式相似，不_只是導通元件改變，當輸入電 源正半週時’降升壓轉換器1謂，將輸人交流W轉換^流電源 W ’同時間’降升壓轉換器n不工作；反之，當輸入電源負半週時， =升壓轉換H 11:11作，將輸人交流電轉換成錢電源Μ，而降升 壓轉換器I U作。為簡化分析，本文只針對正半波電源作分析，並 忽略被動歧f路Iw'Cm ’它帛減轉翻的錢成分，不影響轉 換器動作。 〜 為了達到功因修正的目的’降升壓轉換器必須工作在不連續電流 模式’在此—條件下，根據功率開關元件的導通狀態，在—‘二 週期内，電路可區分為五個王作模式，如第五圖所示1六圖顯示在 1326565 各工作模式下的電壓及的電流理論波形，其中，第六圖(a)顯示輸入電 壓為正半週時的波形；第六圖(b)顯示輸入電壓為負半週時的波形。 一、 工作模式: 工作模式I開始於閘極訊號由咼電位變為低電位的瞬間 關閉，經過短暫的怠遲時間後，閘級訊號由低電位變為高電位， 0並未立即導通，因為共振電路成電感性，共振電流人落後電壓，在 02關閉瞬間，人為負值並流向二極體A’一旦A導通，0兩端電壓 幾乎為零(-0.7V)，整流後的輸入電壓跨在I〆上，降升壓轉換器工作於 DCM電感電流/〆從零開始線性增加，/p/增加的速度與輸入電壓成 正比’當心與/，的和大於零時，二極體A戴止，進入工作模式u。 二、 工作模式ΙΙ(?1 : 込導通，部分/ρ流過0，剩餘部分流經共振電路，G保持在導通 狀態’ 兩端電壓仍然等於整流後的輸入電壓，心繼續線性增加， Α由負漸漸增加至正值，之後，心與Λ共同流過心由於^切換導通 時電壓、電流鱗於零’具有零賴及零電流切換導通優點，切換損 失很小。當閘極電壓F㈣轉為低準位時，開關ρ/截止，此時，^到達 峰值’進入工作模式ΙΠ。 三、 工作模式ΙΙΙ(ί2 </<ί3): 進入工作模式III的瞬間’開關⑦截止，Λ為正值，其路徑由開關 ㈣換到二極體Α，對。充電’為了使轉換器工作於職，。兩端 電壓(PV_2)必須設計大於輸入交流電壓的峰值，使^為逆向偏墨心 不再流過輸入電源，而是流經&對C/充電、兩端電壓為負值 (-M)力從峰值開始線性下降。由於&的峰值與輸入電壓成正比關 係，因此，心可能比厶晚下降至零；也可能比厶早下降至零，前者， 1326565 當Λ下降至零時，進入工你η, 工作模式糾。 作模式心；後者，當心下降至零時，進入 阶〇 m時乂為正且流經仏’仏兩端電壓等於二極體導通電 位磁為％彳乎為零，經過短暫的怠遲時間後，閘級訊號心由低電 ί然而’&並未立即導通，迨7,經過零點變負時，仏切 、l如同心仏具有零電壓及零電流切換導通優點，切換損失很 小〇 四、 工作模式IV-a(i3<i<i4): 厶流經過β?，h繼續下降，杳+_± da ㈣7 ^ · 騎科續電流的工作模式，在閘級 嫩H恤&遞_零，鱗，進入工作模 式V 〇 五、 工作模式IV-b(i3<i<i4): 在此工作模式下，心為零’ ^截止；人為正且流經D2 零點變負時，&切換導通，進入工作模式V。 田“過 六、 工作模式ν(ί4<ί<ί5): 在此工作模式下仏導通，人流經么，電容 當心由高電位變為低電位瞬間置〜、振-路’ 工作模式工。 a戥止電路進入下-高頻週期的 &、&的工作貝任週期均等於0.5，控制降升 干π Ρ 流模式，且在每-輸入電源週期内，使開關切換頻率= 咏續電 輸入電流可以追隨輸人電壓波形且同相位，如此可^ 2疋’則 數。所以整流器輸入電流4的峰值會追隨輸入電壓波形，第= 波前的輸入電流/ρ示意波形。 弟七圖為慮 當儲能電感的電壓對時間的積分小於零時，降升壓轉換器工作於 10 1326565 非連續電流模式’若是降升壓轉換器能於輸人電壓峰_，能操作於 不連續電流導通模式，财德於輸人電義每__作點必定都能 工作於不連續電流導通模式，因此，直流鏈電壓必需大於輸入· 壓的岭值。 私 • 第八圖為輪入電壓％與輸入電流4波形，輸入電流非常接近正弦 :波且與輸入電壓同相，安定器效率為90% ;功率因數為輸入電 机的總諧波失真為8〇%。第九圖為兩組降升壓轉換器的電感電流波 _ 形，當輸入電壓正半波時，只有降升壓轉換器I有電通過，當輸^ 電壓負半波時，只有降升壓轉換器11有電流通過，電感電流在i個電 源週期内，均操作於不連續電流導通模式。 第十圖顯示燈管電壓％及燈管電流‘的波形，燈管電壓與電孤 電流幾乎同相，燈管呈現電阻性；燈管電流的峰值因數_丨％。第 十:圖顯示~、/Wi2與人在輸入電壓於正半波峰值，零點附近與 負半波峰值時的波形’制波形與理論推導娜料—致。&與&均 開始於負電流，此負電流電流流過主動開關旁的並聯二極體(A，^)， • 絲開_端電壓輕，這表示主動關❽與&確實可以零電壓切 換導通。第十二圖顯示長時間的波形，從圖中亦可發 現，兩組降升壓轉換器工作於不連續電流導通模式，且分別於輸入電 源的正、負半週工作。 综上所述，本發明所提出的單級高功因D類串並聯共振式登光燈 電子安定H單級高功崎光燈電子安定器，不但具有電路構造簡單、 控制容易及高效率與低成本等優點、經由實際測量結果顯示此單級高 力因的電子安定器整體電路效率高達9〇% ;輸入電源的功率因數也高 達0.99 ;而輸入電流的總諧波失真為8 〇%。 11 【圖式簡單說明】 第1為D _並聯共振式換流^縣燈電子安定器。 第〜圖為雙級高功目D類串並聯共振式螢光燈電子找器電路 架構。 ° 笛一 —圖為單級尚功因D類串並聯共振式螢光燈電子安定器。 第四圖為主動開關觸發信號對稱脈波寬度調變。 第五圖為工作模式I、II、III、IV-a、IV-b、V。 第六圖為理論波形。 第七圖為令示意波形。 第八圖為輸入電壓匕與輸入電流波形。 第九圖為降升壓式轉換器電流^與波形。 第十圖為燈管電壓與燈管電流/arc波形》 第十一圖為、/r、/幻與/幻波形。 第十二圖為長時間量測的、/r、/S7與4波形。 【主要元件符號說明】1326565 IX. Description of invention: [Technical field to which the invention belongs] This judgment is divided into two groups: the two types of reductions: the improvement of the circuit is integrated into a single-level, and the active market is shared to reduce the control power. Axis_number of components, and will be in the zero voltage spot = flow switching conduction, to reduce the _ tree switching loss to achieve high efficiency [Prior Art] Electronic stability n Daxiang is listening to the power semiconductor components for the switch For high-frequency switching action, provide camp light = load = power. Class D series and parallel connection __ child ___ early, efficiency ^ suitable for high listening, Wei Qian received the value of the rainbow, and thus was mostly adopted by __. _= Vibrating Fluorescent "Sub-stabilization will be driven by self-excited or external excitation. Sinari _= Self-excited pick-up load current feedback self-generated drive signal, no additional control (4) Road: into her. _, from the butterfly's self-regulation of the sky, the limit of the system, the system is not easy to achieve the function of power, dimming, warm-up control and other functions. • The first figure shows the circuit structure of a Class D series-parallel resonant fluorescent lamp electronic ballast that drives the fluorescent lamp, which is the most common half-bridge structure on the market. Mainly use two sets of DC power supply to provide energy to the D-type series-parallel resonant fluorescent lamp electronic stability writing, after the series-parallel resonant electronic ballast is replaced by high-frequency switching to drive the camp light load, the circuit is composed of two series The fluorescent tube is constructed, and the series resonance portion is composed of an inductor. It is composed of a capacitor Cs, and the parallel resonance portion includes capacitors Cp, and (3), wherein the filament current flows through only Cfl and Cf2. In theory, the two active switches S1 and S2 have the same on-time “so there is no DC component in the input power of the resonant circuit, but due to the difference in components and the changes in the parameters of the circuit, the DC component may exist in the resonant envelope. Medium 'Therefore, it is necessary to use the capacitor Cs to filter out the DC component present in the resonant circuit. The two sets of half-wave rectification circuits can be used to provide the DC voltage source required by the first figure. If the two-wave rectification circuit is added behind the half-wave rectification circuit, the appropriate circuit parameter design and the switching time of the wire-off component (4) are matched. Not only can a stable DC power source be provided, but it will also have a correction effect, as shown in the second figure. In the second figure, there are two sets of step-down conversion converters H, wherein the step-down converter 转换 converts the positive half wave of the AC input power source into a DC voltage via the rectifying diode D3; The negative half-wave of the AC input power source is converted into a DC voltage via the rectifying diode D4. This two-stage stability H requires two sets of control circuits to control two sets of step-down conversion converters and class D series-parallel resonance converters. Streamer, and the main touch _ number of up to four 'series two-stage architecture requires two power conversion processes, increasing switching losses and additional conduction losses, making the overall _ circuit effect low; and, requires two sets of control The circuit drives the power factor correction circuit and the resonance type converter I to additionally add a suppression circuit and a switching element to complicate the circuit structure and increase the cost. For low-cost, cost-sensitive electronic ballasts, it is not conducive to the market competitiveness of their products. SUMMARY OF THE INVENTION The main object of the present invention is to provide a county lamp electronic ballast having a simple circuit structure, controllability, efficiency, and cost reduction. The main feature of the present invention is that two sets of down-converting converters are connected in the round-out end of the passive chopper, and each of the two sets of step-down boosting machines is provided with two diodes, - active open =, energy storage inductance And DC chain capacitors are composed; and each group-down boost converter is used to generate 2 active_ and DC link capacitors and resonant circuits to form - Class D series-parallel common fluorescent lamp electronic ballast. [Embodiment] The preferred embodiment is described in detail with reference to the following drawings: The present invention preserves the characteristics of the step-down converter and the class D resonant converter. Advantages, single-stage high power due to D_«resonant type fluorescent f sub-ampere (10), circuit structure 7 & two sets of step-down converters and class D resonant converters. The process of integration is human, the switch in the figure _ and the switch V switch from the switch, and rearrange the position of the inductor Γ pole recognition and recognition, get the single-stage high-power D-class series-parallel / vibration of the third figure Fluorescent lamp electronic stability 11, integrated m group control schematic and two active switches, control circuit _ pulse width modulation control mode, Langding active switch switching frequency and duty cycle. Since the energy storage inductances of the two sets of step-down converters are respectively negative for the half cycle of the input power supply, no current flows at the same time. Therefore, the actual circuit uses the iron core and the two sets of windings to make the inductance 'and ^. The slit switch element brother & & is a double-conducting switch, which can be used with a smart FET whose base rhyme can be used as A and /3⁄4 ' without additional parallel diodes. Therefore, compared with other single-stage high-powered Deng Deng electronic electronic 疋 2 circuit, the single-stage 〇_parallel resonance high-power fluorescent lamp electronic stability (four) of the number of diodes proposed by the present invention is very low. Greatly reduced, the reduced diodes, part of which is fast two minutes. Therefore, the circuit of this research project will be more competitive in one book. In addition, the passive contact m of the circuit towel and the capacitance g are used to cancel the high (four) flow component of the shop, so that the input current is a low-frequency sine wave. - For the purpose of verifying the feasibility of integrating the single-stage high-performance D-language fluorescent lamp electronic female benefit, the present invention will use two series of fluorescent lamps as design examples, and the operation of the circuit Principle and transfer mode, the basic wave analysis method to derive the circuit equation: j circuit towel parameters, so that the two-story boost converter (four) are operating materials continuous current conduction = type '(10) D_ parallel resonance fluorescent lamp electronic stability n design In the case of zero-voltage and zero-current switching conduction operation, the single-stage high-power D-type series-parallel resonant fluorescent lamp electronic ballast with _ high power factor, wave, low switching loss plate height has symmetry The circuit structure, the active stipulations _ work lion, therefore, must use the symmetrical pulse width modulation to control the off. &, active open _ trigger signal as shown in the fourth figure 7F ' bb is the gate voltage of the switch 7, 02 , the pulse width is equal ^ fill the shaded part is the late time, in the late time &, ^ are low potential, when the time is increased, the pulse width is reduced, the delay time can not be zero, Prevent the switch. 仏 turn on at the same time. In the figure, & is a duty cycle of ^&, which is the ratio of pulse wave & degree to duty cycle. 'And... stability (four) road structure and (four) circuit new chicks, for the input power supply, its positive half cycle is similar to the negative half cycle of the security mode, not _ just the conduction component changes, when the input power supply is half a week 'lower The boost converter 1 says that the input AC W conversion power supply W ' at the same time 'down boost converter n does not work; conversely, when the input power supply negative half cycle, = boost conversion H 11:11, The input AC power is converted into a money source, and the boost converter IU is used. In order to simplify the analysis, this paper only analyzes the positive half-wave power supply, and ignores the passive disparity path Iw'Cm ’. It reduces the turning money component and does not affect the converter action. ~ In order to achieve the purpose of power correction, 'the step-down converter must work in the discontinuous current mode'. Under this condition, according to the conduction state of the power switching element, the circuit can be divided into five kings in the two periods. The mode, as shown in the fifth figure, shows the theoretical waveform of the voltage and current in each working mode of 1326565. The sixth figure (a) shows the waveform when the input voltage is positive half cycle; the sixth figure ( b) Display the waveform when the input voltage is negative half cycle. 1. Working mode: Working mode I starts at the moment when the gate signal changes from 咼 potential to low potential. After a short delay time, the sluice signal changes from low to high, and 0 does not turn on immediately because The resonant circuit is inductive, the resonant current is backward voltage, and at the moment of closing 02, the artificial negative value flows to the diode A'. Once A is turned on, the voltage across 0 is almost zero (-0.7V), and the rectified input voltage crosses. On I〆, the step-down converter operates at DCM inductor current/〆 linearly increases from zero, and /p/ increases the speed proportional to the input voltage. When the sum of / and /, the sum is greater than zero, the diode A wears Then, enter the working mode u. Second, the working mode ? (?1: 込 conduction, part / ρ flows through 0, the rest flows through the resonant circuit, G remains in the conducting state' The voltage across the two ends is still equal to the rectified input voltage, the heart continues to increase linearly, The negative gradually increases to a positive value, after which the heart and the cymbal flow together through the heart. Since the voltage and current scales at zero when switching is turned on, the advantages of zero-turn and zero-current switching conduction are small, and the switching loss is small. When the gate voltage F (four) is turned into At low level, the switch ρ/cuts, at this time, ^ reaches the peak value 'Entering the working mode ΙΠ. 3. Working mode ΙΙΙ (ί2 </< ί3): Entering the working mode III moment 'Switch 7 is cut off, Λ Positive value, the path is changed from switch (4) to diode Α, right. Charging 'In order to make the converter work, the voltage at both ends (PV_2) must be designed to be larger than the peak value of the input AC voltage, so that ^ is the reverse bias Instead of flowing through the input power, it flows through & C/charge, the voltage across the negative (-M) force decreases linearly from the peak. Since the peak value of & is proportional to the input voltage, therefore, the heart May fall to zero later than in the evening; It drops to zero earlier than the ,, the former, 1326565 When Λ falls to zero, it enters the work η, the working mode is corrected. The mode heart; the latter, when the heart falls to zero, it enters the order 〇m and is positive and flows through 仏'仏The voltage at both ends is equal to the diode conduction potential. The magnetic field is almost zero. After a short delay time, the gate signal is low. However, '& does not turn on immediately, 迨7, after zero point change When negative, the cut, l is like the heart has zero voltage and zero current switching conduction advantage, the switching loss is very small. Fourth, the working mode IV-a (i3 < i < i4): turbulence through β?, h continues to decline,杳+_± da (4)7^ · The working mode of riding the continuous current, in the gate level tender H-shirt & hand _ zero, scale, enter the working mode V 〇 five, working mode IV-b (i3 < i < i4): In this mode of operation, the heart is zero '^ cutoff; when the person is positive and flows through D2, the zero point becomes negative, and the switch is turned on and enters the working mode V. Field "over six, working mode ν (ί4<ί<ί5): In this mode of operation, the 仏 is turned on, and the person flows through, and the capacitor is turned from a high potential to a low potential, and the vibration is set. The working mode is a. The circuit enters the lower-high frequency period &, & the working bay period is equal to 0.5, the control is ramped up to the dry π Ρ current mode, and the switch is switched during each-input power cycle. Frequency = 咏Continuous input current can follow the input voltage waveform and is in phase, so it can be 2 疋 ' 数. Therefore, the peak value of the rectifier input current 4 will follow the input voltage waveform, the input current / ρ of the = wavefront waveform The seventh picture shows that when the voltage-to-time integral of the energy storage inductor is less than zero, the step-down converter operates at 10 1326565. The discontinuous current mode 'If the step-down converter can input the voltage peak _, it can operate. In the discontinuous current conduction mode, every __ point in the input and output of the financial system must work in the discontinuous current conduction mode. Therefore, the DC link voltage must be greater than the ridge value of the input and voltage. Private • The eighth picture shows the wheel voltage % and input current 4 waveforms. The input current is very close to the sine: wave and is in phase with the input voltage, the ballast efficiency is 90%; the power factor is the total harmonic distortion of the input motor is 8〇 %. The ninth figure shows the inductor current wave _ shape of the two sets of step-down converters. When the input voltage is positive half-wave, only the step-down converter I has electricity. When the voltage is negative half-wave, only the boost is reduced. The converter 11 has a current through, and the inductor current operates in the discontinuous current conduction mode during i power supply cycles. The tenth graph shows the waveform of the lamp voltage % and the lamp current ‘, the lamp voltage is almost in phase with the electric orphan current, and the lamp tube is resistive; the peak value of the lamp current is _丨%. Tenth: The graph shows ~, /Wi2 and the waveform of the input voltage at the positive half-wave peak, the vicinity of the zero point and the negative half-wave peak, and the theoretical derivation. Both && start with a negative current flowing through the parallel diode (A, ^) next to the active switch, • the wire open _ terminal voltage is light, which means that the active switch and & indeed can be zero The voltage is switched on. Figure 12 shows the long-term waveform. It can also be seen from the figure that the two sets of step-down converters operate in discontinuous current conduction mode and operate in the positive and negative half cycles of the input power supply, respectively. In summary, the single-stage high-power D-class series-parallel resonant type Deng Deng electronic stability H single-stage high-powered light electronic ballast proposed by the invention not only has the advantages of simple circuit structure, easy control and high efficiency. The advantages of low cost, etc., show that the overall circuit efficiency of the electronic ballast of this single-stage high force is up to 9〇% through actual measurement results; the power factor of the input power source is also as high as 0.99; and the total harmonic distortion of the input current is 8〇%. 11 [Simple description of the diagram] The first is D _ parallel resonance type commutation ^ county lamp electronic ballast. The first figure is a two-stage high-power class D series-parallel resonant fluorescent lamp electronic finder circuit architecture. ° Flute One - The picture shows a single-stage still power due to the D-type series-parallel resonant fluorescent lamp electronic ballast. The fourth picture shows the symmetrical pulse width modulation of the active switch trigger signal. The fifth picture shows the working modes I, II, III, IV-a, IV-b, and V. The sixth picture is the theoretical waveform. The seventh figure is a schematic waveform. The eighth picture shows the input voltage 匕 and input current waveform. The ninth figure shows the step-down converter current and waveform. The tenth picture shows the lamp voltage and the lamp current/arc waveform. The eleventh picture shows the /r, / magic and / illusion waveforms. Figure 12 shows the /r, /S7 and 4 waveforms measured over a long period of time. [Main component symbol description]
濾波器Cr 燈弩FL1、FL2 降升壓式轉換器I、II D類串並聯共振式換流器螢光燈電子安定器10 Ls、Lm、Lpi、Lp2、Lpf] ' Lpj2 l%Cm' Cs、Cp、Cfl、Cf2、Cl、C2 開關元件、、心 主動開關、& 12 1326565 開關仏、込 二極體 /)/、Ζλ?、、乃<5Filter Cr Lamp 弩FL1, FL2 Down Boost Converter I, II Class D Parallel Resonant Converter Fluorescent Lamp Electronic Ballast 10 Ls, Lm, Lpi, Lp2, Lpf] ' Lpj2 l%Cm' Cs , Cp, Cfl, Cf2, Cl, C2 switching elements, heart active switch, & 12 1326565 switch 仏, 込 diode /) /, Ζ λ?,, and is <5
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