201114158 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種具有緩震電路之自激返馳型電源 轉換器，特別是有關於一種應用於非接觸式電源供應器之 具有緩震電路之自激返驰型電源轉換器。 【先前技術】 隨著科技的進步與經濟的發展，人們對於電源轉換器 的要求越來越高，因此許多新穎的電源轉換器陸續被開發 出來，以滿足人類的需求，其中返驰型轉換器具有低成本 和高切換頻率之優點，因此廣被工業界所使用。 然而，由於習知的返馳型轉換器具有高切換頻率，因 此在每次開關切換都會產生高電壓突波，而導致高切換損 失0 因此，需要一種新的返馳型電源轉換器，以降低開關 的切換損失。 【發明内容】 因此，本發明之一態樣是在提供一種具有緩震電路之 自激返驰型電源轉換器。 根據本發明之一實施例，此自激返馳型電源轉換器包 含變壓器、整流二極體、功率開關、啟動電路、電流偵測 電路、自激驅動電路、穩壓電路以及緩震電路。變壓器係 用以根據直流電壓來提供電能至負載，其中變壓器包含一 次侧繞組和二次侧繞組，此一次側繞組具有第一繞組端點 201114158 ^第f繞組端點。—功率開關具有第-輸人端、第-輸出 2和第—控制端’其中此第—輸人端係電性連接至一次側 f組之第-繞組端點。整流二極體係電性連接於變壓器和 二載之間。啟動電路係電性連接至功率開關之第一控制 端’以根據直流電屋來開啟該功率開關。電流横測電路係 電性連接至功率開關之第一輸出端，以偵測流過功率開關 之功率開關電流的電流值。自激驅動電路包含第一電壓偵 測線圈’此第一電壓偵測線圈係用以摘測變壓器之一次侧 • 、、"°組上的電壓值，其中自激驅動電路係電性連接至電流偵 =電路和功率開關之第—控制端，以根據功率開關電流的 電流值來關閉功率開關’以及根據變壓器之一次側繞組上 的電壓值來開啟功率開關。缓震電路包含第二電壓制線 圈、第-電容、第-二極體以及第二二極體。第二電壓侦 測線圈係用以仙變壓器之二次側繞組上的電壓值，以及 當功率開關開啟時，將第一電容所儲存之漏感能量回授至 輸=電源端和變塵器，其中第二電壓摘測線圈具有第一線 籲圈，點和第二線圈端點，第一線圈端點係電性接地。第一 電容係用以儲存變壓器之漏感能量，其 -電容端點和第二電容端點，第-電容端點係ΐ:連2 該一次侧繞組之第一繞組端點。第一二極體之正極係電性 連接至該第二電屋制線圈，第一二極體之負極係電性連 接至第-電容之第二電容端點。第二二極體之正極係電性 連接至第一電容之該第二電容端點，第二二極體之負極係 電杜連接至次側繞組之第二繞組端點。穩麗電路 二電壓偵測線圈、第三二極體、第一電阻以及第一齊納二 極體。第三二極體之正極係電性連接至第二線圈端點 Γ C 1 201114158 山電阻具有第一電阻端點和第二電阻端點，其中第一電陴 η、電性連接至第三二極體之負極，第二電阻端點係電 性接地。證_十 背納二極體(Zener diode)，其中第一齊納二極 之負極係電性連接至第一二極體之負極，第一齊納二極 正極係雜連接至自舰動電路。 【實施方式】201114158 VI. Description of the Invention: [Technical Field] The present invention relates to a self-excited flyback power converter having a cushioning circuit, and more particularly to a cushioning power supply for a non-contact power supply Self-excited flyback power converter for circuits. [Prior Art] With the advancement of technology and economic development, people are increasingly demanding power converters, so many novel power converters have been developed to meet human needs, among which the flyback converter It has the advantages of low cost and high switching frequency, and is therefore widely used by the industry. However, since the conventional flyback converter has a high switching frequency, a high voltage surge is generated every time the switching is switched, resulting in a high switching loss. Therefore, a new flyback power converter is required to reduce Switching loss of the switch. SUMMARY OF THE INVENTION Accordingly, it is an aspect of the present invention to provide a self-excited flyback power converter having a snubber circuit. According to an embodiment of the invention, the self-excited flyback power converter comprises a transformer, a rectifying diode, a power switch, a starting circuit, a current detecting circuit, a self-excited driving circuit, a voltage stabilizing circuit, and a cushioning circuit. The transformer is used to provide electrical energy to the load based on a DC voltage, wherein the transformer includes a primary winding and a secondary winding having a first winding end point 201114158^the f winding end point. - The power switch has a first-input terminal, a first-output 2 and a first-control terminal' wherein the first-input terminal is electrically connected to the first-winding terminal of the primary side f-group. The rectifying diode system is electrically connected between the transformer and the two loads. The startup circuit is electrically coupled to the first control terminal of the power switch to turn the power switch on according to the DC house. The current cross-measure circuit is electrically connected to the first output of the power switch to detect the current value of the power switch current flowing through the power switch. The self-excited driving circuit includes a first voltage detecting coil. The first voltage detecting coil is used to extract a voltage value on a primary side of the transformer, and a "° group, wherein the self-excited driving circuit is electrically connected to The current sense = circuit and the first control terminal of the power switch to turn off the power switch according to the current value of the power switch current and to turn on the power switch according to the voltage value on the primary side winding of the transformer. The cushioning circuit includes a second voltage coil, a first capacitor, a diode-diode, and a second diode. The second voltage detecting coil is used for voltage value on the secondary winding of the transformer, and when the power switch is turned on, the leakage energy stored by the first capacitor is fed back to the power supply terminal and the dust filter. The second voltage extraction coil has a first line loop, a point and a second coil end point, and the first coil end point is electrically grounded. The first capacitor is used to store the leakage inductance energy of the transformer, the capacitor end point and the second capacitor end point, and the first capacitor end point is: the second winding end of the primary side winding. The positive electrode of the first diode is electrically connected to the second electrical house coil, and the negative electrode of the first diode is electrically connected to the second capacitor end of the first capacitor. The positive pole of the second diode is electrically connected to the second capacitor end of the first capacitor, and the cathode of the second diode is electrically connected to the second winding end of the secondary winding. Steady circuit Two voltage detection coils, a third diode, a first resistor, and a first Zener diode. The positive pole of the third diode is electrically connected to the second coil end point 1 C 1 201114158 The mountain resistor has a first resistance end point and a second resistance end point, wherein the first electric pole η is electrically connected to the third two The negative pole of the pole body, the second resistor end is electrically grounded. The Zener diode of the first Zener diode is electrically connected to the negative pole of the first diode, and the first Zener diode is connected to the self-shipping circuit. . [Embodiment]
凊參照第1圖，其係繪示根據本發明之一實施例之異 有緩震電路之自激返馳型電源轉換器1〇〇的電路結構示意 圖。自激返馳型電源轉換器100係用以接收輸入電壓源170 所提供之電能並將其提供至負載電阻R。。自激返馳型電源 轉換器100包含變壓器110、啟動電路120、自激驅動電路 130、穩壓電路140、緩震電路150、功率開關s、電流偵 測電路160以及整流二極體D〇 ’其中整流二極體d0係電 性連接於變壓器110和負載電阻R。之間，以對變壓器u0 所輸出之電壓進行半波整流。 變壓器11 〇係用以接收輸入電壓源17〇所提供之直流 電壓，並根據功率開關S的開關狀態，來提供電能至負載 電阻R。。變壓器110包含一次侧繞組Np和二次側繞組Nsi， 一次側繞組Np係電性連接至輸入電壓源17〇，而二次側繞 組Nsl係電性連接至負載電阻R。。另外，變壓器11〇之等 效激磁電感Lm和漏感Llk亦繪示於第1圖中。 功率開關S係電性連接至變壓器110、啟動電路12〇、 自激驅動電路130和電流偵測電路16〇。功率開關s具有 輸入端、控制端和輸出端’其中控制端係電性連接至啟動 201114158 電路120和自激驅動電路13〇 ;輸入端係電性連接至變壓 器U〇 ;輸出端係電性連接至電流偵測電路160。在本實施 例中，功率開關S為金屬氧化半導體場效電晶體 (MOSFET)’其閘極係電性連接至啟動電路12〇和自激驅動 電路130，其汲極係電性連接至變壓器110，其源極係電性 連接至電流偵測電路160。 啟動電路120係用以根據輸入電壓源17〇所提供之電 壓來開啟功率開關s。在本實施例中，當輸入電壓源 開始提供提供直流電壓時，啟動電路120會根據輸入電壓 源170所提供之直流電壓來開啟功率開關s，以啟動自激 返驰型電源轉換器1〇〇。當自激返驰型電源轉換器1〇〇被 啟動後，功率開關S功率開關的開啟或關閉便由自激驅動 電路130所控制。 電流偵測電路160係用以偵測流過功率開關s的電 流’並將偵測結果輸出至自激驅動電路13〇，使自激驅動 電路130根據電流偵測電路16〇所測得的電流值來決定是 否關閉功率開關S。 自激驅動電路130係用以控制功率開關S之啟閉。自 激驅動電路130包含有電壓偵測線圈ns2，此電壓偵測線圈 Να係用以偵測一次側繞組Np上的電壓值，以使自激驅動 電路130根據一次側繞組np上的電壓值來決定是否開啟 (導通)功率開關S。另外，自激驅動電路130亦根據電流谓 測電路160所測得的電流值和穩壓電路140所傳送之控制 訊號來決定是否關閉（戴止）功率開關S。 緩震電路150係用以改善功率開關S動作時所產生的 突波(spike)。緩震電路150包含電壓偵測線圈Ns3、電容 201114158Referring to Fig. 1, there is shown a circuit configuration diagram of a self-excited flyback type power converter 1〇〇 of a different snubber circuit according to an embodiment of the present invention. The self-excited flyback power converter 100 is configured to receive the power provided by the input voltage source 170 and provide it to the load resistor R. . The self-excited flyback power converter 100 includes a transformer 110, a starting circuit 120, a self-excited driving circuit 130, a voltage stabilizing circuit 140, a cushioning circuit 150, a power switch s, a current detecting circuit 160, and a rectifying diode D〇' The rectifier diode d0 is electrically connected to the transformer 110 and the load resistor R. The half-wave rectification is performed between the voltage output from the transformer u0. The transformer 11 is configured to receive the DC voltage supplied by the input voltage source 17 , and provide power to the load resistor R according to the switching state of the power switch S. . The transformer 110 includes a primary side winding Np and a secondary side winding Nsi, the primary side winding Np is electrically connected to the input voltage source 17A, and the secondary side winding Ns1 is electrically connected to the load resistor R. . In addition, the equivalent magnetizing inductance Lm and the leakage inductance Llk of the transformer 11 are also shown in Fig. 1. The power switch S is electrically connected to the transformer 110, the starting circuit 12A, the self-excited driving circuit 130, and the current detecting circuit 16A. The power switch s has an input end, a control end and an output end 'where the control end is electrically connected to the start 201114158 circuit 120 and the self-excited drive circuit 13〇; the input end is electrically connected to the transformer U〇; the output end is electrically connected To current detection circuit 160. In this embodiment, the power switch S is a metal oxide semiconductor field effect transistor (MOSFET) whose gate is electrically connected to the startup circuit 12A and the self-excited driving circuit 130, and the drain is electrically connected to the transformer 110. The source is electrically connected to the current detecting circuit 160. The startup circuit 120 is operative to turn on the power switch s based on the voltage provided by the input voltage source 17A. In this embodiment, when the input voltage source begins to provide the DC voltage, the startup circuit 120 turns on the power switch s according to the DC voltage provided by the input voltage source 170 to activate the self-excited flyback power converter. . When the self-excited flyback type power converter 1 is activated, the power switch S power switch is turned on or off by the self-excited drive circuit 130. The current detecting circuit 160 is configured to detect the current flowing through the power switch s and output the detection result to the self-excited driving circuit 13〇, so that the self-excited driving circuit 130 can measure the current according to the current detecting circuit 16〇. The value determines whether to turn off the power switch S. The self-excited driving circuit 130 is used to control the opening and closing of the power switch S. The self-excited driving circuit 130 includes a voltage detecting coil ns2 for detecting a voltage value on the primary side winding Np, so that the self-excited driving circuit 130 is based on the voltage value on the primary side winding np. Decide whether to turn on (turn on) the power switch S. In addition, the self-excited driving circuit 130 also determines whether to turn off (wear) the power switch S based on the current value measured by the current sense circuit 160 and the control signal transmitted by the voltage stabilizing circuit 140. The cushioning circuit 150 is for improving the spike generated when the power switch S operates. The cushioning circuit 150 includes a voltage detecting coil Ns3 and a capacitor 201114158
Cs、二極體Di和D2。電容Cs係用以儲存變壓器之漏感能 量，而二極體D!和D2則用以引導漏感能量。當功率開關S 關閉時，漏感能量會儲存於電容Cs中，以降低功率開關關 閉時之瞬間電壓峰值和切換損失。而當功率開關S打開 時，電容Cs便會流出電流，此電流依序流經功率開關S、 電流偵測電路160、接地層、電壓偵測線圈Ns3以及二極體 D2後流回電容Cs，如此漏感能量便可透過電壓偵測線圈 Ns3來傳送至輸入電壓端及變壓器110,以有效地提高轉換 器之轉換效率。 穩壓電路140係用以穩定自激返馳型電源轉換器100 的輸出電壓。穩壓電路140包含有電阻R!和R2、二極體 D3、電容C3以及齊納二極體(Zener diode)Dz2。穩壓電路140 係電性連接至電壓偵測線圈Ns3，而電壓偵測線圈Ns3可偵 測二次侧繞組Nsl上的電壓，如此便可透過二極體D3、電 阻心和R2將此電壓施加於二極體Dz2之負極上。當二次側 繞組Nsl上的電壓大於預設之齊納電壓值時，二極體Dz2 負極上的電壓會將二極體Dz2打通，以傳送齊納電流至自 激驅動電路130。另外，電阻心和R2係以分壓的方式來調 整電壓偵測線圈Ns3所測得之電壓的電壓值，之後再將調 整後的電壓施加於二極體Dz2之負極上。 由以上說明可知，電壓偵測線圈Ns可偵測二次侧繞組 Nsl上的電壓，避免返驰型電源轉換器100輸出過大的電 壓，亦可將變壓器的漏感能量回送至輸入電壓端及變壓 器，以減少返馳型電源轉換器100運作時的能量損失。因 此返驰型電源轉換器100不但可提供穩定的輸出電壓，更 可節省電能的消耗。 201114158 請同時參照第2圖和第3圖，第2圖係繪示習知返驰 型電源轉換器之功率開關上的跨壓對時間的曲線關係圖， 第3圖係繪示返驰型電源轉換器1〇〇之功率開關s上的跨 壓對時間的曲線關係圖。由第2圖和第3圖可明顯看出， 當功率開關關閉時，返馳型電源轉換器100之功率開關S 上的跨壓比習知返馳型電源轉換器之功率開關上的跨壓 小’因此返馳型電源轉換器100之功率開關S所承受之電 壓應力也相對降低。 請參照第4圖，其係缘示根據本發明一實施例之具有 缓震電路之自激返驰型電源轉換器200的電路結構示意 圖。自激返馳型電源轉換器200係類似於自激返馳型電源 轉換器100。在本實施例中，輸入電壓源270係供應交流 流電壓至全波整流器280’此交流電壓經過全波整流器28〇 處理後’再供給至自激返馳型電源轉換器200。另外，爲 了使返驰型電源轉換器200的輸入電壓穩定，可於輸入電 壓源270和返馳型電源轉換器200間並聯電容Cdc。 啟動電路220包含電阻Rst和齊納二極體Dzl。當輸入 電壓源270提供電能至啟動電路220時，電壓Vg會被施加 於齊納二極體Dzl之負極，而當電壓Vg之值超過功率開關 S的導通電壓閥值，功率開關S便會開啟，使輸入電壓源 270所提供之電流流過功率開關S。另外，齊納二極體〇 21 玎避免輸入電壓源270施加太大的電壓至功率開關s，使 功率開關燒毀。藉由適當地選擇齊納二極體Dzl的崩潰電 麈，可於電壓Vg過大時，導通齊納二極體Dzl，以保護功 率開關S。 201114158 自激驅動電路230包含控制開關Q、電阻和、 電容Czcd以及電壓偵測線圈NS2。控制開關Q具有輸入端、 輸出端和控制端。在本實施例中’控制開關Q為雙載子接 面電晶體(BJT)，其集極為輸入端’電性連接至功率開關$ 之控制端；BJT之基極為控制端’電性連接至電阻Rb和穩 壓電路之齊納一極體Dz2，· BJT之射極為輸出端，電性接 地。電流偵測電阻260係電性連接至Rb，以於功率開關s 之電流超過預設閥值時，導通BJT。當BJT導通後，功率 開關S的控制端的電壓值會下降，當控制端的電壓值低於 功率開關S的導通電壓閥值時，功率開關s便會關閉。類 似地’當電壓偵測線圈Ns3所測得之電壓值過大而使得齊 納二極體DzZ崩潰時’ bjt亦會導通，而使得功率開關S 關閉。當功率開關S關閉後，ns2所測得之電壓值會越來越 大，直到所測得之電壓值與Czcd之跨壓的和大於功率開關 S的導通電壓閥值時，功率開關s開啟。 雖然本發明已以實施例揭露如上，然其並非用以限定 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* 特舉較佳實施例，並配合所附圖式，作詳細 說明如下： 第1圖係繪不根據本發明之一實施例之具有缓震電路 201114158 之自激返馳型電源轉換器的電路結構示意圖。 第2圖係繪示習知返馳型電源轉換器之功率開關上的 跨壓對時間的曲線關係圖。 第3圖係繪示返馳型電源轉換器之功率開關上的跨壓 對時間的曲線關係圖。 第4圖係繪示根據本發明一實施例之具有緩震電路之 自激返驰型電源轉換器的電路結構示意圖。Cs, diodes Di and D2. Capacitor Cs is used to store the leakage inductance energy of the transformer, while diodes D! and D2 are used to guide the leakage inductance energy. When the power switch S is turned off, the leakage inductance energy is stored in the capacitor Cs to reduce the instantaneous voltage peak and switching loss when the power switch is turned off. When the power switch S is turned on, the capacitor Cs will flow current, and the current flows through the power switch S, the current detecting circuit 160, the ground layer, the voltage detecting coil Ns3, and the diode D2, and then flows back to the capacitor Cs. The leakage energy can be transmitted to the input voltage terminal and the transformer 110 through the voltage detecting coil Ns3 to effectively improve the conversion efficiency of the converter. The voltage stabilizing circuit 140 is for stabilizing the output voltage of the self-excited flyback power converter 100. The voltage stabilizing circuit 140 includes resistors R! and R2, a diode D3, a capacitor C3, and a Zener diode Dz2. The voltage stabilizing circuit 140 is electrically connected to the voltage detecting coil Ns3, and the voltage detecting coil Ns3 can detect the voltage on the secondary side winding Ns1, so that the voltage can be applied through the diode D3, the resistor core and the R2. On the negative electrode of the diode Dz2. When the voltage on the secondary side winding Ns1 is greater than the preset Zener voltage value, the voltage on the negative terminal of the diode Dz2 turns on the diode Dz2 to deliver the Zener current to the self-excited driving circuit 130. Further, the resistor core and R2 adjust the voltage value of the voltage measured by the voltage detecting coil Ns3 by voltage division, and then apply the adjusted voltage to the negative electrode of the diode Dz2. As can be seen from the above description, the voltage detecting coil Ns can detect the voltage on the secondary winding Ns1, avoiding the output voltage of the flyback power converter 100, and returning the leakage energy of the transformer to the input voltage terminal and the transformer. To reduce the energy loss when the flyback power converter 100 operates. Therefore, the flyback power converter 100 can not only provide a stable output voltage, but also save power consumption. 201114158 Please refer to Fig. 2 and Fig. 3 at the same time. Fig. 2 is a graph showing the relationship between the voltage across the power switch of the conventional flyback power converter and time. Fig. 3 is a diagram showing the flyback power supply. A plot of the cross-over versus time on the power switch s of the converter 1〇〇. As is apparent from FIGS. 2 and 3, when the power switch is turned off, the voltage across the power switch S of the flyback power converter 100 is greater than the voltage across the power switch of the conventional flyback power converter. Therefore, the voltage stress applied to the power switch S of the flyback power converter 100 is also relatively low. Referring to Fig. 4, there is shown a circuit configuration diagram of a self-excited flyback type power converter 200 having a snubber circuit according to an embodiment of the present invention. The self-excited flyback type power converter 200 is similar to the self-excited flyback type power converter 100. In the present embodiment, the input voltage source 270 supplies the AC current voltage to the full-wave rectifier 280' which is then processed by the full-wave rectifier 28 to be supplied to the self-excited flyback power converter 200. Further, in order to stabilize the input voltage of the flyback power converter 200, the capacitor Cdc can be connected in parallel between the input voltage source 270 and the flyback power converter 200. The startup circuit 220 includes a resistor Rst and a Zener diode Dzl. When the input voltage source 270 supplies power to the startup circuit 220, the voltage Vg is applied to the negative terminal of the Zener diode Dzl, and when the value of the voltage Vg exceeds the conduction voltage threshold of the power switch S, the power switch S is turned on. The current supplied by the input voltage source 270 is caused to flow through the power switch S. In addition, the Zener diode 玎 21 玎 prevents the input voltage source 270 from applying too much voltage to the power switch s, causing the power switch to burn out. By appropriately selecting the collapse of the Zener diode Dzl, the Zener diode Dzl can be turned on to protect the power switch S when the voltage Vg is excessive. 201114158 The self-excited driving circuit 230 includes a control switch Q, a resistor and a capacitor Czcd, and a voltage detecting coil NS2. The control switch Q has an input terminal, an output terminal, and a control terminal. In this embodiment, the control switch Q is a bi-carrier junction transistor (BJT), and its collector input terminal is electrically connected to the control terminal of the power switch $; the base of the BJT is extremely controlled to be electrically connected to the resistor. The Zener body of the Rb and the voltage regulator circuit Dz2, · BJT shoots the output end, electrically grounded. The current detecting resistor 260 is electrically connected to the Rb to turn on the BJT when the current of the power switch s exceeds a preset threshold. When the BJT is turned on, the voltage value at the control terminal of the power switch S drops. When the voltage value at the control terminal is lower than the turn-on voltage threshold of the power switch S, the power switch s is turned off. Similarly, when the voltage value measured by the voltage detecting coil Ns3 is too large and the Zener diode DzZ collapses, bjt is also turned on, and the power switch S is turned off. When the power switch S is turned off, the voltage value measured by ns2 will become larger and larger, until the sum of the measured voltage value and the voltage across the Czcd is greater than the on-voltage threshold of the power switch S, the power switch s is turned on. The present invention has been disclosed in the above embodiments, and is not intended to limit the invention. It is to be understood that the invention may be modified and modified in various ways without departing from the spirit and scope of the invention. The scope is subject to the definition of the scope of the patent application attached. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent and obvious <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; A schematic diagram of a circuit structure of a self-excited flyback power converter having a cushioning circuit 201114158 according to an embodiment of the present invention. Figure 2 is a graph showing the cross-pressure vs. time on the power switch of a conventional flyback power converter. Figure 3 is a graph showing the cross-over versus time vs. time on the power switch of the flyback power converter. 4 is a schematic diagram showing the circuit structure of a self-excited flyback power converter having a cushioning circuit according to an embodiment of the present invention.
【主要元件符號說明】 100 :電源轉換器 120 啟動電路 140 穩壓電路 160 電流偵測電路 200 電源轉換器 230 自激驅動電路 270 輸入電壓源 c3、 Cdc、Czcd、Cs . 電容 Dzl、 dz2 :齊納二極體 Lm · 激磁電感 Νρ· 一次側繞組 Nsl ： 二次侧繞組 Q :控制開關 Ri ' R2、Rzcd、Rb : 電阻 S :功率開關 110 變壓器 130 自激驅動電路 150 缓震電路 170 輸入電壓源 220 啟動電路 260 電流偵測電阻 280 全波整流器[Main component symbol description] 100: power converter 120 startup circuit 140 voltage regulator circuit 160 current detection circuit 200 power converter 230 self-excited drive circuit 270 input voltage source c3, Cdc, Czcd, Cs. Capacitance Dzl, dz2: Nanodiode Lm · Magnetizing inductance Νρ· Primary winding Nsl : Secondary winding Q: Control switch Ri ' R2, Rzcd, Rb : Resistor S : Power switch 110 Transformer 130 Self-excited drive circuit 150 Cushion circuit 170 Input voltage Source 220 startup circuit 260 current detection resistor 280 full wave rectifier
Di、D2、D3、D〇 ·二極體Di, D2, D3, D〇 · Dipole
Lik :漏感Lik: leakage
Ns2 :電壓偵測線圈 Ns3 :電壓偵測線圈 R。：負载電阻 Rst :電阻 Vg :電壓Ns2: voltage detection coil Ns3: voltage detection coil R. : load resistance Rst : resistance Vg : voltage