M330679 八、新型詳細說明： 【新型所屬之技術領域】 =作係有關—種交換式電源轉㈣㈣ w曰-種適用於小家電產品的電源轉換器，主要：一 種振鈴扼流轉換系統（Ringingchokec_ ;、、 交換式電源轉換器。 · cc)的 【先前技術】. 按，一般的小家電產品，如··電 傳真機或手機充電器…等，都是㈣^二、錄放影機、 ^ + 疋错由一個功率不大作穩仝 性較佳的直流電源供應器，將一-心 佴JL你田w ^ Ψ屯轉換成低壓直流電 ί :、主:二式電源轉換器電路，如第2圖所 AC電源21經過一個橋式整流器22及一濾波 2:及之二麦’產生一高壓的直流電，其後，再經-變壓； 24及一輸出整流電路25，輸姦 口口M330679 VIII, new detailed description: [New technology field] = related to the system - a type of switching power supply (four) (four) w曰 - a power converter for small household appliances, mainly: a ringing turbulence conversion system (Ringingchokec_; ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,疋 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 由 、 、 、 、 、 、 、 、 、 、 、 、 The AC power source 21 passes through a bridge rectifier 22 and a filter 2: and the second wheat 'generates a high voltage direct current, and then passes through - transformer; 24 and an output rectifier circuit 25, the rape mouth
電源以供使用。 翰出-子產品所需的低壓DC 如第2圖所示，該習知交換式 RCC系統，其中且包含右一門^曰得狹°°电路係使用 電阻？7 一 有開關電晶體（FE”26、一啟動 電路30所二反饋轉28、一控制電路29及一電壓_ :路30所組成；而該控制電路29中包含由 定電路;當電容292被充電到-後’該雙接面電晶體293便被開啟，連帶的使門 =器=級繞組241並轉換到次級繞 ，而上述:人級繞組243的輸出端一方面會對輸出整 M330679 流電路25中的電容251進行充電，另一方面同時 ； 電子設備提供其所需的電力。 ^ :又’當開關電晶體26關閉之後，此時變壓哭％的反 饋繞組242因電磁感應而產生第4端到第3端的1同極性電 流’即第3端的電壓會由負值反轉變成正值，再經正反^ -電路28中之電容281釋放出的電流再對開關電晶體託^ •閘極充電，直到開關電晶體26的閘極電壓再升到原始電壓 Vt後，開關電晶體26才會再度開啟使初級繞組24i可持 •續有電流通過；如此反覆進行相同動作而自我震盪，初級 繞組241即可持續的將電流能量移轉至次級繞纽243，達 到供應電源使用之目的。 胃…然而，如上述之習知交換式電源轉換器電路，為使變 壓器24在次級繞組243輸出端（Vo與GND)之間的電题差 維持在一穩定值；則係在次級繞組243二輸出端之=二接 有一電壓偵測電路3〇 ’當其偵測到二端的電壓差過高而 到該電壓偵測電路30之穩壓二極體3〇1的崩潰電壓時，1 ·-中的發光二極體3〇2即被導通發光，而使控制電路29中的 -光耦合電晶體294開啟，讓反饋繞組242第3端的正電题 對雙接面電晶體293的閘極充電而開啟，如此，可立 暫停初級繞組241 .的電流通過，使次級繞組243二輪出端 之間的電壓差不再增加，使其達到維持輸出電壓值在3 的範圍内。 ^ 惟，當上述習知電路的AC電源21的電壓不足時， 反饋、％組242之第3端所產生的感應電壓也會降低；此萨， 抆制電路29將無法獲得足夠的電壓使雙接面電晶體2⑽ 6 M330679 開啟’即無法將開關電晶 級繞組241持續導電，二f關閉’據而，同樣會導致初 壓也持續上井，、# &成在次級繞組243輸出端的的電 σ 乂 而發生損壞連接在該輸出端的電器產 口口，以及，其中電壓偵測電路3〇係利 與控制電路29中的朵杈人币 ? 苴白妒合挞士 μ 先耦σ电日日體294作耦合控制，據而， —對個電路結構的體積與其製作成本。是以， .失換式電源轉換器電路在使用與製造上的缺 失，而涊為有再研究改良的必要。 【新型内容】 本=人有鐘於上述習知交換式電源轉換器電路的 發創新的空間；爱精心研究，並積個人從 ^ °又。與製造的多年經驗，終研發設計出一種薪 新的交換式電源轉換器電路的改良構造」。 改二，it”在提供一種交換式電源轉換器電路的 中在與開關電晶體連接的控制電路上同時呈 有一穏壓偵測電路、一過雷泣仅4 + Μ ·- 踗，而1古夕壬 ,甩/瓜保邊電路及一過電壓保護電 〃有^重的㈣效果，能麵在:欠 端 電壓維持在一穩定值，增進電器產品使用的安全Γ的 作次一目的在提供一種交換式電源轉換器電路的 中在與開關電晶體連接的控制電路係直接在 路上擷取一回授訊號’以該回授訊號的 '堡值大小來控制開關電晶體的開啟或關閉的控制動作， :良習知電路使用發光二極體與光輕合電晶體的控 件，達到縮小體積及降低成本之功效。 本創作再-目的在提供-種交換式電源轉換器電路的 7 M330679Power is available for use. The low-voltage DC required for the Han-out product, as shown in Figure 2, is the conventional switched RCC system, which includes the right-handed circuit. 7 has a switching transistor (FE" 26, a start-up circuit 30, two feedback turns 28, a control circuit 29 and a voltage _: way 30; and the control circuit 29 contains a fixed circuit; when the capacitor 292 is After charging to - 'the double junction transistor 293 is turned on, the associated gate = device = step winding 241 and converted to the secondary winding, and the above: the output of the human winding 243 on the one hand will output the whole M330679 The capacitor 251 in the stream circuit 25 is charged, and on the other hand, the electronic device supplies its required power. ^ : Again, when the switching transistor 26 is turned off, the feedback winding 242 of the variable pressure crying is electromagnetically induced. The current of the same polarity of the fourth end to the third end is generated, that is, the voltage at the third end is reversed from a negative value to a positive value, and then the current discharged from the capacitor 281 in the positive and negative circuit 28 is switched to the transistor transistor carrier. ^ • The gate is charged until the gate voltage of the switching transistor 26 rises again to the original voltage Vt, and the switching transistor 26 is turned on again to allow the primary winding 24i to sustain current flow; thus repeating the same action and self Concussion, the primary winding 241 is sustainable The current energy is transferred to the secondary winding 243 for the purpose of supplying power. Stomach... However, as in the conventional switching power converter circuit described above, in order to make the transformer 24 at the output of the secondary winding 243 (Vo and GND) The electrical error between the two is maintained at a stable value; the second output of the secondary winding 243 is connected to a voltage detecting circuit 3〇' when it detects that the voltage difference between the two terminals is too high and the voltage is detected. When the breakdown voltage of the Zener diode 3〇1 of the circuit 30 is measured, the light-emitting diode 3〇2 in the light-emitting diode is turned on, and the light-coupled transistor 294 in the control circuit 29 is turned on. The positive polarity of the third end of the feedback winding 242 is turned on to charge the gate of the double junction transistor 293, so that the current of the primary winding 241 can be temporarily suspended, so that the voltage difference between the secondary winding ends of the secondary winding 243 is not Further, it is increased to maintain the output voltage value within the range of 3. ^ However, when the voltage of the AC power source 21 of the above conventional circuit is insufficient, the induced voltage generated by the feedback, the third end of the % group 242 is also lowered. This Sa, the circuit 29 will not be able to get enough voltage to make double The junction transistor 2(10) 6 M330679 is turned on, that is, the switching transistor level winding 241 cannot be continuously conductive, and the second f is turned off, which also causes the initial voltage to continue to the upper well, and the # & is formed at the output end of the secondary winding 243. The electric σ 乂 is damaged and connected to the electrical outlet of the output end, and the voltage detecting circuit 3 is connected with the control coin in the control circuit 29? The body 294 is coupled to control, and accordingly, the volume of the circuit structure and the manufacturing cost thereof. Therefore, the loss of use and manufacturing of the loss-of-conversion power converter circuit is necessary for further research and improvement. [New content] This = person has a new space for the above-mentioned conventional exchange-type power converter circuit; love meticulous research, and personally from ^ ° again. With years of experience in manufacturing, the R&D has designed an improved construction of a new switching power converter circuit. In the second, it" in the provision of a switching power converter circuit on the control circuit connected to the switching transistor simultaneously has a pressure detection circuit, a thunder just 4 + Μ · - 踗, and 1 ancient Xi Xi, 甩 / melon edge circuit and an over voltage protection 〃 have a heavy (four) effect, can face: the undervoltage is maintained at a stable value, to improve the safety of the use of electrical products, the purpose of providing a The control circuit connected to the switching transistor in the switching power converter circuit directly captures a feedback signal on the road to control the opening or closing of the switching transistor by the size of the threshold of the feedback signal. , : Good learning circuit uses the control of light-emitting diode and light-light crystal to achieve the effect of reducing the volume and reducing the cost. This creation is again aimed at providing a kind of switching power converter circuit 7 M330679
改良構造，各A P 將開關電晶體關閉日:源：：壓不足’無法經雙接面電晶體 電晶體:而將開關；晶電流保護電路來開啟雙接面 改良才 作在提供一種交換式電源轉換器電路的 能藉過電=電壓過通過變壓器的初級繞組時， 體關閉。〜 開啟雙接面電晶體，而將開關電晶 良構= = 本創作交換式電源轉換跑 關電晶體、一啟 ㈣：的整流器、-變壓器-開 組成，盆中…；路、一輸出整流電路及-控制電路所 -次級繞組；Ή裔包含有一初級繞組、一反饋繞組及 第2端二門組的第1端連接於整流器的正電端， 反饋达二:Α晶體與整流器的負電端（接地）連接； 汉煩、、凡、、且的弟3端細_ -Γ Π； ^ 極，第4端連接至開關電晶體的閘 晶體關閉後；再流器的負電端’用來使開關電 來提供•二田 出端，並連接有輸出整流電路，係用 泣盥否的^ ，開關電晶體係用來控制初級繞組導通電 流與否的開關；啟動帝 〒、兒 電曰f %路連接在初級繞組的第1端與開關 :二 間，用來提供開關電晶體初開啟時所需i 的啟動電壓；其特徵在： 了 1而要 含有二係用來控制開關電晶體的關閉時機，包 :雙接面電晶體、一穩壓 路及一過電壓保講帝牧·德从 保4電 體的源極連接，：：盘’又面電晶體的基極與開關電晶 木極鉍開關電晶體的閘極連接，射極連接 M330679 至負電端（接地）；穩壓偵測電路包含一穩壓二極體與— 電阻串聯，穩壓二極體的正電端連接於雙接面電晶體的基 極’電阻的另端連接至反饋繞組第4端；過電流保護電路 包含串聯於開關電晶體源極的二個並聯的電阻，其中之— 電阻的另端與雙接面電晶體的基極連接，另一電阻的另端 連接至負電端;過電壓保護電路係為一正電端連接於雙接 面電晶體的基極，另端連接至反饋繞組第4端的穩壓二 體、 據上述之構造實施時，穩壓偵測電路係藉其連接至負 電端與反饋繞組第4端相接連，使反饋繞組第4端所釋出 的電壓可回授到穩壓二極體，直到該穩壓二極體達到崩潰 電壓時，其即可對雙接面電晶體的基極進行充電而開啟， 連帶的使開關電晶體關閉，以暫停初級繞組通過電流，達 到次級繞組的輸出電壓維持在一定水準之功效；其次，過 電流保護電路係當該開關電晶體通過的電流過大時，則會 有一部分的電流經並聯的電阻對雙接面電晶體的基極進^ 充電而開啟，連帶的使開關電晶體關閉，以暫停初級繞組 通過電流，達到過電流的保護功效；再者，過電壓保護電 路係當該開關電晶體通過的電壓過大時，其在反饋繞組的 感電電壓也會隨之增加，當其電壓升高達到該過電壓保護 電路之穩壓二極體的崩潰電壓時，其回授的電壓則可對雙 接面電晶體的基極進行充電而開啟，達到過電壓的保護功 效0 【實施方式】 為使貴審查委員對本創作之構造、裝置及其特徵有更 M330679 進一步的認識與瞭解，兹舉—可行實施例並配合圖式詳細 說明如下： 首先請參閱第1圖所示，本創作交換式電源轉換器電 ，，改良構造，主要包括有一訧變阢的整流器u、一變 壓器12、一開關電晶體13、一啟動電路14、一輸出整流 -電路15、一正反饋電路16及一控制電路17所組成，其中， .該變壓$ 12包含有一初級繞組m、一反饋繞組122及一 -人級繞組123;初級繞組121的第丨端連接於整流器u的 正電端，第2端透過開關電晶體13連接至整流器n的負 電端，反饋繞組122的第3端經一正反饋電路16連接至開 關電晶體13的閘極，第4端經一電容175連接整流器u 的負電端’用來使開關電晶體13在被關閉後能再度的開 啟；次級繞組123的第5與第6端分別為感應電流的正/ 負電輸出端，並連接有輸出整流電路15，制來提供所連 接之電器使用的電力：開關電㈣13係用來控制初級繞挺 121導通電流與否的電子式開關；啟動電路14連接在初級 繞组121❺第1端與開關電晶體13的閉極之間，用以提供 開關電晶體13在供電之初開啟時所需的電壓；其特徵在： 一控制電路17，係用來控制開關電晶體13的關閉時 為^各有雙接面電晶體171、一穩廢偵測電路172、一 :電流保護電路173及一過電壓保護電路174 ;雙接面電 晶體171縣極與開g電晶體13❺源極連接，集極與開關 電晶體13的閘極連接，射極連接至負電端；穩堡侦測電路 172包含有一串聯的穩壓二極體1721與電阻1722， 極體1721的正電端連接於雙接面電晶體171的基極了電： M330679 17 2 2的另連接至反饋繞組第4端；過電流保護電路17 3 • 包含串聯於開關電晶體13源極的二個並聯電阻17 31、 • 1732’其中之一電阻1731的另端與雙接面電晶體171的基 極連接，另一電阻1732的另端連接至負電端；過電壓保護 電路174係為一正電端連接於雙接面電晶體Η!的基極， •另端連接至反饋繞組第4端的穩壓二極體。 - 據上述之構造實施時，穩壓偵測電路172係藉其連接 至負電端與反饋繞組122的第4端相接連，使反饋繞組122 • 第4端所釋出的電壓可回授到穩壓偵測電路172的穩壓二 極體17 21，直到該穩壓二極體17 21達到崩潰電壓時，其 即可對雙接面電晶體171的基極進行充電而開啟，連帶的 使開關電晶體13閘極端的電壓值降低而關閉，以暫停初級 繞組通過電流，達到次級繞組123的輸出電壓維持在一定 水準值之功效；其次，過電流保護電路173係當該開關電 晶體13通過的電流過大時，則會有一部分的電流經並聯的 電阻1731對雙接面電晶體171的基極進行充電而開啟，同 ••樣的可連帶的使開關電晶體13關閉，以暫停初級繞組m -通過電流’達到過電流的保護功效；再者，過電壓保護電 路174係當該開關電晶體13通過的電壓過大時，其在反饋 繞組122的感電電壓也會隨之增加，當其電壓升高達到該 過電壓保遵電路174之穩壓二極體的崩潰電壓時，由反饋 繞組122第4端回授的電壓則可對雙接面電晶體的基 極進行充電而開啟，達到過電壓的保護功效。 如上所述，本創作中所使用的穩壓偵測電路172，係 設於雙接面電晶體171的基極與反饋繞組122的第4端之 M330679 間，即係直接設置在變壓器12的一次側，且沒有使用習知 控制電路常用的發光二極體PD與光耦合電晶體ρτ的控^ 構件，至可有效達到縮小電源轉換器的體積，及降低^ _ 造成本之功效。 、 如以上所揭露之實施例的形狀、構造，係本創作諸 可行實施例中的-個實施例，故本創作的中請專利範圍並 不侷限於此’凡在*偏離本創作構思的條件下，各元件可 用所屬技術領域人員瞭解的相似或等同元件來替換。 綜上，述，本創作「交換式電源轉換器電路的改良構 造」確實能相多重的㈣，及縮小體積與降低製造成本 之功效’進而增加該項產品的實用性與經濟價值；又，本 ::構w在提出專利申請前未有相同物品或技術見於刊物 :A開使用，是以本案能符合新型專利要彳，爰依法提出 新型專利的申請。 12 M330679 【圖式簡單說明】 第1圖爲本創作的電路圖。 第2圖爲習知交換式電源轉換器的電路圖。 【主要元件符號說明】 整流器 11 變壓器 12 開關電晶體 13 啟動電路 14 輸出整流電路 15 正反饋電路 16 控制電路 17 初級繞組 121 反饋繞組 122 次級繞組 123 雙接面電晶體 171 穩壓偵測電路 172 過電流保護電路17 3 過電壓保護電路174 電容 175 穩壓二極體 1721 電阻 1722 電阻 1731、 1732 AC電源 21 整流裔 22 遽波 23 變壓器 24 輸出整流電路 25 開關電晶體 26 電阻 27 正反饋電路 28 控制電路 29 電流偵測電路 30 初級繞組 241 反饋繞組 242 次級繞組 243 電容 251、 、281 電阻 291 電容 292 雙接面電晶體 293 光耦合電晶體 294 穩壓二極體 301 發光二極體 302 13Improved structure, each AP will switch the transistor off day: source:: insufficient pressure 'cannot pass through double-sided transistor transistor: and switch; crystal current protection circuit to open double junction improvement to provide a switching power supply When the converter circuit can pass through the primary winding of the transformer, the body is turned off. ~ Turn on the double junction transistor, and switch the transistor crystal structure = = This creation exchange power supply conversion switch transistor, a start (four): rectifier, - transformer - open composition, basin ...; road, an output rectifier circuit And-control circuit-secondary winding; the first end of the group consisting of a primary winding, a feedback winding and a second-end two-door group is connected to the positive terminal of the rectifier, and the feedback reaches two: the negative terminal of the germanium crystal and the rectifier ( Grounding) connection; Hanfan, Fan, and brother's 3 end fine _ - Γ Π; ^ pole, the fourth end is connected to the switch transistor after the gate crystal is closed; the recharger's negative terminal ' is used to make the switch Electric to provide • Ertian's output, and connected with an output rectifier circuit, is the use of the switch ^ ^, switch electric crystal system used to control the switch of the primary winding conduction current or not; start the emperor, children's electricity 曰 f % road Connected to the first end of the primary winding and the switch: two, used to provide the starting voltage of i required when the switching transistor is initially turned on; it is characterized by: 1 and contains the second system to control the closing timing of the switching transistor , package: double junction transistor, a voltage regulator And the over-voltage protection of the emperor and animal husbandry, the slave's source connection, the base of the transistor is connected to the gate of the switch-electric crystal-ceramic switch transistor, and the emitter is connected to M330679. To the negative terminal (ground); the voltage regulation detection circuit includes a voltage regulator diode and a resistor in series, and the positive terminal of the voltage regulator diode is connected to the base of the double junction transistor. The fourth end of the feedback winding; the overcurrent protection circuit comprises two parallel resistors connected in series to the source of the switching transistor, wherein the other end of the resistor is connected to the base of the double junction transistor, and the other end of the other resistor is connected To the negative terminal; the overvoltage protection circuit is a positive terminal connected to the base of the double junction transistor, and the other end is connected to the voltage regulator 2 of the fourth end of the feedback winding, according to the above configuration, the voltage regulation detection The circuit is connected to the negative terminal and connected to the fourth end of the feedback winding, so that the voltage released at the fourth end of the feedback winding can be fed back to the voltage stabilizing diode until the voltage stabilizing diode reaches the breakdown voltage. It can charge the base of the double junction transistor , the associated switch transistor is turned off to suspend the primary winding through the current, to achieve the secondary winding output voltage is maintained at a certain level; second, the overcurrent protection circuit is when the switching transistor through the current is too large, then A part of the current is turned on by the parallel resistors to charge the base of the double junction transistor, and the switch transistor is turned off to suspend the primary winding through the current to achieve the protection effect of the overcurrent; further, the overvoltage When the voltage of the switching transistor is too large, the voltage of the feedback winding is also increased, and when the voltage rises to reach the breakdown voltage of the voltage regulator of the overvoltage protection circuit, The feedback voltage can be turned on by charging the base of the double junction transistor to achieve the protection effect of overvoltage. [Embodiment] In order to make the reviewer's structure, device and features of the creation more M330679 further Awareness and understanding, the following is a detailed description of the possible examples and the following diagrams: First, please refer to Figure 1, the creation of this work The power converter, the improved structure, mainly comprises a rectifier u, a transformer 12, a switching transistor 13, a starting circuit 14, an output rectifying circuit 15, a positive feedback circuit 16 and a The control circuit 17 is composed of a primary winding m, a feedback winding 122 and a first-person winding 123; the first end of the primary winding 121 is connected to the positive terminal of the rectifier u, the second The terminal is connected to the negative terminal of the rectifier n through the switching transistor 13. The third end of the feedback winding 122 is connected to the gate of the switching transistor 13 via a positive feedback circuit 16, and the fourth terminal is connected to the negative terminal of the rectifier u via a capacitor 175. 'Used to enable the switching transistor 13 to be turned on again after being turned off; the 5th and 6th ends of the secondary winding 123 are the positive/negative output terminals of the induced current, respectively, and the output rectifier circuit 15 is connected to provide The electric power used by the connected electric appliance: switch electric (four) 13 is an electronic switch for controlling the conduction current of the primary winding 121; the starting circuit 14 is connected between the first end of the primary winding 121 and the closed end of the switching transistor 13 To mention The voltage required for the switching transistor 13 to be turned on at the beginning of the power supply; characterized by: a control circuit 17 for controlling the closing of the switching transistor 13 to have a double junction transistor 171, a stable waste detection Measuring circuit 172, a: current protection circuit 173 and an overvoltage protection circuit 174; the double junction transistor 171 county pole is connected to the open g transistor 13 ❺ source, the collector is connected to the gate of the switching transistor 13, the emitter Connected to the negative terminal; the stable detection circuit 172 includes a series voltage regulator diode 1721 and a resistor 1722, and the positive terminal of the pole body 1721 is connected to the base of the double junction transistor 171. M330679 17 2 2 The other end is connected to the fourth end of the feedback winding; the overcurrent protection circuit 17 3 • includes two parallel resistors 17 31, • 1732' connected in series with the source of the switching transistor 13 The base of the crystal 171 is connected, and the other end of the other resistor 1732 is connected to the negative terminal; the overvoltage protection circuit 174 is connected to the base of the double junction transistor ,!, and the other end is connected to the feedback winding. The voltage regulator diode at the 4th end. - According to the above configuration, the voltage stabilization detecting circuit 172 is connected to the fourth terminal of the feedback winding 122 by its connection to the negative terminal, so that the voltage discharged from the feedback winding 122 and the fourth terminal can be feedback-stabilized. The voltage stabilizing diode 17 21 of the voltage detecting circuit 172 can charge the base of the double junction transistor 171 when the voltage stabilizing diode 17 21 reaches the breakdown voltage, and the associated switch The voltage value of the gate terminal of the transistor 13 is lowered to be turned off to suspend the primary winding through current, and the output voltage of the secondary winding 123 is maintained at a certain level; secondly, the overcurrent protection circuit 173 is passed through the switching transistor 13 When the current is too large, a part of the current is turned on by the parallel resistor 1731 to charge the base of the double junction transistor 171, and the same type of switchable transistor 13 is turned off to suspend the primary winding. m - the protection effect of the overcurrent by the current '; furthermore, the overvoltage protection circuit 174 is such that when the voltage through which the switching transistor 13 passes is too large, the induced voltage of the feedback winding 122 also increases. When the voltage rises to reach the breakdown voltage of the voltage regulator diode of the overvoltage protection circuit 174, the voltage fed back by the fourth terminal of the feedback winding 122 can charge the base of the double junction transistor to be turned on. Overvoltage protection. As described above, the voltage stabilization detection circuit 172 used in the present invention is disposed between the base of the double junction transistor 171 and the M330679 of the fourth terminal of the feedback winding 122, that is, once disposed directly on the transformer 12. On the side, the control components of the light-emitting diode PD and the light-coupled transistor ρτ which are commonly used in the conventional control circuit are not used, so as to effectively reduce the volume of the power converter and reduce the effect of the power source. The shape and configuration of the embodiment disclosed above are the embodiments of the presently feasible embodiments, and thus the scope of the patent application of the present invention is not limited to the conditions of the present invention. In the following, the various components may be replaced by similar or equivalent elements known to those skilled in the art. In summary, the creation of the "improved structure of the switching power converter circuit" can indeed be multiple (four), and the effect of reducing the size and reducing the manufacturing cost, thereby increasing the practicality and economic value of the product; ::Construction w Before the patent application is filed, the same article or technology is not found in the publication: A is used, which is an application that can meet the requirements of the new patent in this case and propose a new type of patent according to law. 12 M330679 [Simple description of the diagram] The first diagram is the circuit diagram of the creation. Figure 2 is a circuit diagram of a conventional switched power converter. [Main component symbol description] Rectifier 11 Transformer 12 Switching transistor 13 Start circuit 14 Output rectifier circuit 15 Positive feedback circuit 16 Control circuit 17 Primary winding 121 Feedback winding 122 Secondary winding 123 Double junction transistor 171 Voltage regulation detection circuit 172 Overcurrent protection circuit 17 3 Overvoltage protection circuit 174 Capacitor 175 Regulator diode 1721 Resistor 1722 Resistor 1731, 1732 AC power supply 21 Rectification 22 Chopper 23 Transformer 24 Output rectifier circuit 25 Switching transistor 26 Resistor 27 Positive feedback circuit 28 Control circuit 29 Current detection circuit 30 Primary winding 241 Feedback winding 242 Secondary winding 243 Capacitance 251, 281 Resistance 291 Capacitance 292 Double junction transistor 293 Optical coupling transistor 294 Regulator diode 301 Light-emitting diode 302 13