TWI787097B - Isolated converter - Google Patents
Isolated converter Download PDFInfo
- Publication number
- TWI787097B TWI787097B TW111108854A TW111108854A TWI787097B TW I787097 B TWI787097 B TW I787097B TW 111108854 A TW111108854 A TW 111108854A TW 111108854 A TW111108854 A TW 111108854A TW I787097 B TWI787097 B TW I787097B
- Authority
- TW
- Taiwan
- Prior art keywords
- switch
- voltage
- isolated converter
- electrically connected
- primary winding
- Prior art date
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Dc-Dc Converters (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Bipolar Transistors (AREA)
Abstract
Description
本揭示內容係關於一種隔離型轉換器,特別是能將輸入電壓轉換為輸出電壓的電路結構。The present disclosure relates to an isolated converter, especially a circuit structure capable of converting an input voltage into an output voltage.
隨著科技的快速進展,電壓轉換器已廣泛地使用在各式電子產品中。電壓轉換器可將輸入端上具有一電壓準位的輸入電壓轉換為輸出端上具有另一電壓準位的輸出電壓。然而,在運轉過程中,電壓轉換器內的各個電子元件必須能夠承受電路中的電壓變化,方能穩定提供輸出電壓。With the rapid development of technology, voltage converters have been widely used in various electronic products. The voltage converter converts an input voltage having one voltage level on the input terminal to an output voltage having another voltage level on the output terminal. However, during operation, each electronic component in the voltage converter must be able to withstand voltage changes in the circuit in order to provide a stable output voltage.
本揭示內容之一態樣為一種隔離型轉換器,包含輸入電路、變壓器、第一開關、第二開關及緩衝電路。輸入電路包含至少二輸入電容,用以提供輸入電壓。該些輸入電容之間具有分壓節點。變壓器包含初級繞組及次級繞組,用以根據輸入電壓,於次級繞組上產生輸出電壓。變壓器之初級繞組電性連接於第一開關及第二開關之間。緩衝電路電性連接於第一開關及第二開關之間,且與初級繞組形成放電路徑。緩衝電路用以接收次級繞組反射回初級繞組的反射電壓,且分壓節點係連接於放電路徑。An aspect of the present disclosure is an isolated converter, including an input circuit, a transformer, a first switch, a second switch and a buffer circuit. The input circuit includes at least two input capacitors for providing input voltage. There is a voltage dividing node between the input capacitors. The transformer includes a primary winding and a secondary winding for generating an output voltage on the secondary winding according to an input voltage. The primary winding of the transformer is electrically connected between the first switch and the second switch. The buffer circuit is electrically connected between the first switch and the second switch, and forms a discharge path with the primary winding. The buffer circuit is used for receiving the reflected voltage reflected by the secondary winding back to the primary winding, and the voltage dividing node is connected to the discharge path.
本揭示內容之另一態樣為一種隔離型轉換器,包含輸入電路、變壓器、第一開關、第二開關及緩衝電路。輸入電路包含至少二輸入電容,用以提供輸入電壓。該些輸入電容之間具有分壓節點。變壓器包含初級繞組及次級繞組,用以根據輸入電壓,於次級繞組上產生輸出電壓。變壓器之初級繞組電性連接於第一開關及第二開關之間。緩衝電路,電性連接於第一開關及第二開關之間,且與初級繞組形成放電路徑,以接收次級繞組反射回初級繞組的反射電壓,其中放電路徑上之節點將被固定於分壓電壓。Another aspect of the disclosure is an isolated converter, which includes an input circuit, a transformer, a first switch, a second switch and a snubber circuit. The input circuit includes at least two input capacitors for providing input voltage. There is a voltage dividing node between the input capacitors. The transformer includes a primary winding and a secondary winding for generating an output voltage on the secondary winding according to an input voltage. The primary winding of the transformer is electrically connected between the first switch and the second switch. The snubber circuit is electrically connected between the first switch and the second switch, and forms a discharge path with the primary winding to receive the reflected voltage reflected by the secondary winding back to the primary winding, wherein the node on the discharge path will be fixed at the voltage divider Voltage.
本揭示內容透過將分壓節點連接至放電路徑,使得第一開關及第二開關的跨壓能由分壓節點上的電壓及次級繞組反射回初級繞組的一部分反射電壓來決定。In the present disclosure, by connecting the voltage dividing node to the discharge path, the voltage across the first switch and the second switch can be determined by the voltage on the voltage dividing node and a part of the reflected voltage from the secondary winding back to the primary winding.
以下將以圖式揭露本發明之複數個實施方式,為明確說明起見,許多實務上的細節將在以下敘述中一併說明。然而,應瞭解到,這些實務上的細節不應用以限制本發明。也就是說,在本發明部分實施方式中,這些實務上的細節是非必要的。此外,為簡化圖式起見,一些習知慣用的結構與元件在圖式中將以簡單示意的方式繪示之。Several embodiments of the present invention will be disclosed in the following figures. For the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the present invention, these practical details are unnecessary. In addition, for the sake of simplifying the drawings, some well-known structures and components will be shown in a simple and schematic manner in the drawings.
於本文中,當一元件被稱為「連接」或「耦接」時,可指「電性連接」或「電性耦接」。「連接」或「耦接」亦可用以表示二或多個元件間相互搭配操作或互動。此外,雖然本文中使用「第一」、「第二」、…等用語描述不同元件,該用語僅是用以區別以相同技術用語描述的元件或操作。除非上下文清楚指明,否則該用語並非特別指稱或暗示次序或順位,亦非用以限定本發明。Herein, when an element is referred to as "connected" or "coupled", it may mean "electrically connected" or "electrically coupled". "Connected" or "coupled" may also be used to indicate that two or more elements cooperate or interact with each other. In addition, although terms such as “first”, “second”, . Unless clearly indicated by the context, the terms do not imply any particular order or sequence, nor are they intended to be limiting of the invention.
第1圖為根據本揭示內容之部份實施例所述之隔離型轉換器100之示意圖。隔離型轉換器100包含輸入電路110、變壓器120、第一開關S1、第二開關S2、輸出電路140及緩衝電路130。輸入電路110用以透過至少二個輸入電容C1、C2接收輸入電源Vin提供之輸入電壓。為便於說明,在此將第一電容C1及該第二電容C2相連接之節點稱為「分壓節點Na」。FIG. 1 is a schematic diagram of an
在一實施例中,第一電容C1及第二電容C2之電容大小相同,因此,當輸入電路110儲存輸入電壓時,分壓節點的電壓將會是「輸入電壓的一半」。然而,本揭示內容並不以此為限,在其他實施例中,第一電容C1及第二電容C2的電容值可互不相同。In one embodiment, the capacitances of the first capacitor C1 and the second capacitor C2 are the same. Therefore, when the
在一實施例中,輸入電路110係連接至直流之輸入電源Vin。在部份實施例中,輸入電路110可包含整流電路(如:橋式整流電路),用以接收交流電源,並將整流後的輸入電壓儲存至輸入電容C1、C2。In one embodiment, the
變壓器120包含初級繞組Np及次級繞組Ns。在一實施例中,初級繞組Np及次級繞組Ns的極性位置互為相反。初級繞組Np電性連接於輸入電路110,用以接收輸入電路110傳來之輸入電壓,且次級繞組Ns將根據輸入電壓,感應生成輸出電壓。此外,變壓器120還包含激磁電感Lm及漏感Lk。在部份實施例中,隔離型轉換器100可為升壓轉換器或降壓轉換器。The
第一開關S1及第二開關S2分別電性連接於初級繞組Np之兩端。換言之,變壓器120之初級繞組Np電性連接於第一開關S1及第二開關S2之間。為便於說明,在此將初級繞組Np之兩端稱為第一節點N1及第二節點N2。The first switch S1 and the second switch S2 are respectively electrically connected to two ends of the primary winding Np. In other words, the primary winding Np of the
在第1圖的實施例中,第一開關S1及第二開關S2係由N型的金屬氧化物半導體場效電晶體(N-Type Metal Oxide Semiconductor Field Effect Transistor,N-Type MOSFET)實現,但本揭示內容並不以此為限。在其他部分實施例中,第一開關S1及第二開關S2亦可由P型的金屬氧化物半導體場效電晶體(P-Type Metal Oxide Semiconductor Field Effect Transistor,P-Type MOSFET)或者其他類型的開關元件實現。In the embodiment shown in Figure 1, the first switch S1 and the second switch S2 are implemented by N-type Metal Oxide Semiconductor Field Effect Transistor (N-Type Metal Oxide Semiconductor Field Effect Transistor, N-Type MOSFET), but This disclosure is not limited thereto. In some other embodiments, the first switch S1 and the second switch S2 can also be made of P-type Metal Oxide Semiconductor Field Effect Transistor (P-Type Metal Oxide Semiconductor Field Effect Transistor, P-Type MOSFET) or other types of switches. component implementation.
輸出電路140電性連接於次級繞組Ns,且包含二極體Do及輸出電容Co。輸出電路140用以在初級繞組Np停止接收輸入電壓時(即,第一開關S1及第二開關S2被關斷時),從二次側繞組接收輸出電源,並輸出至負載RL。換言之,隔離型轉換器100為一種馳返式轉換器(Flyback)。在其他實施例中,隔離型轉換器亦可被設計為一種順向式轉換器(Forward),結構將於後續段落說明。The
緩衝電路130電性連接於第一開關S1及第二開關S2之間(即,第一節點N1與第二節點N2之間,且與初級繞組Np並聯)。緩衝電路130與變壓器120之初級繞組Np可形成放電路徑,用以吸收漏感Lk及/或次級繞組Ns反射回初級繞組Np的能量。換言之,當第一開關S1及第二開關S2關斷時,漏感Lk及/或次級繞組Ns反射回初級繞組Np的能量將可放電至緩衝電路130。此外,分壓節點Na電性連接於放電路徑,以使放電路徑上之其中一個節點的電壓被固定於分壓節點Na之分壓電壓。The
在部份實施例中,緩衝電路130包含多個緩衝電容Ca、Cb(snubber capacitor)及至少一個阻抗元件Ra。分壓節點Na電性連接於緩衝電容Ca與緩衝電容Cb間的一個節點Nb。具體而言,第一緩衝電容Ca電性連接於第一開關S1及分壓節點Na,第二緩衝電容Cb電性連接於第二開關S2及分壓節點Na。阻抗元件Ra則電性連接於第一開關S1及第二開關S2之間。然而,分壓節點Na連接於放電路徑的位置並不以第1圖所示之結構為限,其餘連接方式將於後續段落中說明。In some embodiments, the
在本揭示內容中,分壓節點Na連接於放電路徑,以使隔離型轉換器100根據分壓節點Na之分壓電壓與一部分的放電能量決定第一開關S1及第二開關S2的跨壓。舉例而言,若輸入電容C1、C2之電容值相等、緩衝電容Ca、Cb的電容值相等、且忽略漏感能量,則每個輸入電容C1、C2儲存的能量為輸入電壓的一半,且每個緩衝電容Ca、Cb儲存的能量即為反射電壓的一半。據此,第一開關S1及第二開關S2所需承受的跨壓將能被控制地較小。In this disclosure, the voltage dividing node Na is connected to the discharge path, so that the
第2A~2C圖為根據本揭示內容之部份實施例所述之隔離型轉換器100之運作方式示意圖。如第2A圖所示,當第一開關S1及第二開關S2被導通時,初級繞組Np接收輸入電壓。此時,由於輸出電路140之二極體並未導通,因此次級繞組Ns並不會產生輸出電壓或電流。2A-2C are schematic diagrams of the operation of the
第2B及2C圖所示為第一開關S1及第二開關S2被關斷後的電流變化(為避免圖式過於複雜,因此分成兩張圖說明)。在第一開關S1及第二開關S2被關斷後,次級繞組Ns將提供輸出電壓至負載RL。同時,初級繞組Np之漏感Lk以及次級繞組Ns反射至初級繞組Np上的反射電壓將會透過放電路徑(如第2B圖所示之箭號),將能量釋放至緩衝電路130,使緩衝電容Ca、Cb吸收能量。接著,如第2C圖所示,緩衝電容Ca、Cb會將吸收之能量釋放至阻抗元件Ra。Figures 2B and 2C show the current changes after the first switch S1 and the second switch S2 are turned off (in order to avoid the drawing being too complicated, it is divided into two figures for illustration). After the first switch S1 and the second switch S2 are turned off, the secondary winding Ns will provide the output voltage to the load RL. At the same time, the leakage inductance Lk of the primary winding Np and the reflected voltage reflected from the secondary winding Ns to the primary winding Np will release energy to the
如圖所示,緩衝電容Ca、Cb用以接收漏感Lk以及反射電壓。因此,第一開關S1的跨壓約等同於第一輸入電容C1及緩衝電容Ca儲存之電壓的總和。同理,第二開關S2之跨壓約等同於第二輸入電容C2及緩衝電容Cb儲存之電壓的總和。As shown in the figure, the buffer capacitors Ca and Cb are used to receive the leakage inductance Lk and the reflected voltage. Therefore, the voltage across the first switch S1 is approximately equal to the sum of the voltages stored in the first input capacitor C1 and the buffer capacitor Ca. Similarly, the voltage across the second switch S2 is approximately equal to the sum of the voltages stored in the second input capacitor C2 and the buffer capacitor Cb.
舉例而言,輸入電源提供之輸入電壓為1500V,則每個輸入電容C1、C2分別儲存750V,且分壓節點Na之分壓電壓為750V。此外,若次級繞組Ns反射回初級繞組Np的反射電壓為120V,則緩衝電容Ca、Cb分別儲存的電壓為60V。因此,第一開關S1的跨壓將會是「750V+60V」。同理,第二開關S2的跨壓亦為「750V+60V」。由於緩衝電容Ca、Cb分別儲存的能量通常不會大於輸入電容C1、C2所儲存的能量,因此,透過將分壓節點Na連接至放電路徑,第一開關S1或第二開關S2之跨壓將會被控制於小於輸入電壓。換言之,將可降低第一開關S1或第二開關S2所需的耐壓值。For example, if the input voltage provided by the input power supply is 1500V, each of the input capacitors C1 and C2 stores 750V respectively, and the divided voltage of the voltage dividing node Na is 750V. In addition, if the reflected voltage reflected by the secondary winding Ns back to the primary winding Np is 120V, the voltages stored in the buffer capacitors Ca and Cb respectively are 60V. Therefore, the voltage across the first switch S1 will be "750V+60V". Similarly, the voltage across the second switch S2 is also "750V+60V". Since the energy stored in the buffer capacitors Ca and Cb is generally not greater than the energy stored in the input capacitors C1 and C2, by connecting the voltage dividing node Na to the discharge path, the voltage across the first switch S1 or the second switch S2 will be will be controlled to be less than the input voltage. In other words, the withstand voltage required by the first switch S1 or the second switch S2 can be reduced.
此外,在部份實施例中,緩衝電路130還包含至少一個二極體D1、D2,二極體D1、D2之導通方向與放電路徑之電流方向相同。In addition, in some embodiments, the
第3圖所示為根據本揭示內容之另一實施例所述之隔離型轉換器之示意圖。在該實施例中,緩衝電路130包含多個阻抗元件R1、R2。具體而言,第一阻抗元件R1並聯於第一緩衝電容Ca、第二阻抗元件R2並聯於第二緩衝電容Cb。據此,當緩衝電路130放電時,第一緩衝電容Ca將放電至第一阻抗元件R1、第二緩衝電容Cb則放電至第二阻抗元件R2。FIG. 3 is a schematic diagram of an isolated converter according to another embodiment of the present disclosure. In this embodiment, the
第4圖所示為根據本揭示內容之另一實施例所述之隔離型轉換器200之示意圖。於第4圖中,與第1圖之實施例有關的相似元件係以相同的參考標號表示以便於理解,且相似元件之具體原理已於先前段落中詳細說明,若非與第4圖之元件間具有協同運作關係而必要介紹者,於此不再贅述。FIG. 4 is a schematic diagram of an
在該實施例中,分壓節點Na連接於初級繞組Np的中心抽頭Ct(center tap)。中心抽頭Ct將初級繞組Np分成兩個繞組Np1、Np2,繞組Np1、Np2的圈數相同,但本揭示內容並不以此為限。分壓節點Na電性連接於中心抽頭Ct。在第4圖所示之實施例中,第一開關S1及第二開關S2係交錯地導通、關斷,以與次級繞組Ns上產生輸出電壓。在次級繞組Ns輸出輸出電壓時,次級繞組Ns反射至初級繞組Np的反射電壓將會被分配至繞組Np1、Np2。因此,第一開關S1的跨壓將會由第一輸入電容C1及繞組Np1所儲存的能量決定;第二開關S2的跨壓將會由第二輸入電容C2及繞組Np2所儲存的能量決定。據此,同樣能控制第一開關S1及第二開關S2之跨壓。In this embodiment, the voltage dividing node Na is connected to the center tap Ct (center tap) of the primary winding Np. The center tap Ct divides the primary winding Np into two windings Np1 and Np2, and the windings Np1 and Np2 have the same number of turns, but the disclosure is not limited thereto. The voltage dividing node Na is electrically connected to the center tap Ct. In the embodiment shown in FIG. 4, the first switch S1 and the second switch S2 are alternately turned on and off to generate an output voltage with the secondary winding Ns. When the secondary winding Ns outputs the output voltage, the reflected voltage reflected from the secondary winding Ns to the primary winding Np will be distributed to the windings Np1 and Np2. Therefore, the voltage across the first switch S1 is determined by the energy stored in the first input capacitor C1 and the winding Np1; the voltage across the second switch S2 is determined by the energy stored in the second input capacitor C2 and the winding Np2. Accordingly, the voltage across the first switch S1 and the second switch S2 can also be controlled.
承上,在該實施例中,緩衝電路140包含一個緩衝電容Cc及阻抗元件R3。緩衝電容Cc及阻抗元件R3電性連接於第一開關S1及第二開關S2之間,且緩衝電容Cc及阻抗元件R3互為並聯。As above, in this embodiment, the
在前述實施例中,分壓節點Na係連接至節點Nb或中心抽頭Ct,但在其他實施例中,分壓節點Na亦可同時連接至節點Nb及中心抽頭Ct。第5A~5F圖所示為根據本揭示內容之另一實施例所述之隔離型轉換器400之示意圖。於第5A~5F圖中,與第1圖之實施例有關的相似元件係以相同的參考標號表示以便於理解,且相似元件之具體原理已於先前段落中詳細說明,若非與第5A~5F圖之元件間具有協同運作關係而必要介紹者,於此不再贅述。In the foregoing embodiments, the voltage dividing node Na is connected to the node Nb or the center tap Ct, but in other embodiments, the voltage dividing node Na may also be connected to the node Nb and the center tap Ct at the same time. 5A-5F are schematic diagrams of an
在該實施例中,分壓節點Na同時連接至節點Nb及中心抽頭Ct,此外,第一開關S1及第二開關S2係交錯地導通、關斷,以與次級繞組上產生輸出電壓。換言之,隔離型轉換器400為一種交錯式(interleaving)轉換器。In this embodiment, the voltage dividing node Na is connected to the node Nb and the center tap Ct at the same time. In addition, the first switch S1 and the second switch S2 are alternately turned on and off to generate an output voltage with the secondary winding. In other words, the
如第5A圖所示,當第一開關S1導通、第二開關S2關斷時,第一輸入電容C1提供部份之輸入電壓至繞組Np1。如第5B及5C圖所示(為避免圖式過於複雜,在此將開關S1、S2關斷後的狀態分成兩張圖表示),當第一開關S1關斷時,繞組Np1及第一緩衝電容Ca之間形成第一放電路徑(如第5B圖所示之箭號)。此時,第一緩衝電容Ca接收漏感Lk及次級繞組Ns反射至繞組Np1之反射電壓。接著,第一緩衝電容Ca會將接收到的能量釋放至緩衝電路130內之阻抗元件Ra。As shown in FIG. 5A, when the first switch S1 is turned on and the second switch S2 is turned off, the first input capacitor C1 provides part of the input voltage to the winding Np1. As shown in Figures 5B and 5C (in order to avoid too complicated diagrams, the states after the switches S1 and S2 are turned off are divided into two figures), when the first switch S1 is turned off, the winding Np1 and the first buffer A first discharge path (as shown by the arrow in FIG. 5B ) is formed between the capacitors Ca. At this time, the first buffer capacitor Ca receives the leakage inductance Lk and the reflected voltage reflected from the secondary winding Ns to the winding Np1. Then, the first buffer capacitor Ca releases the received energy to the impedance element Ra in the
相似地,如第5D圖所示,當第一開關S1關斷、第二開關S2導通時,第二輸入電容C2提供部份之輸入電壓至繞組Np2。如第5B及5C圖所示,當第二開關S2關斷時,繞組Np2及第二緩衝電容Cb之間形成第二放電路徑(如第5E圖所示之箭號)。此時,第二緩衝電容Cb接收次級繞組Ns反射至繞組Np2之反射電壓。接著,第二緩衝電容Cb會將接收到的能量釋放至緩衝電路130內之阻抗元件Ra。Similarly, as shown in FIG. 5D, when the first switch S1 is turned off and the second switch S2 is turned on, the second input capacitor C2 provides part of the input voltage to the winding Np2. As shown in FIGS. 5B and 5C, when the second switch S2 is turned off, a second discharge path (as shown by the arrow in FIG. 5E ) is formed between the winding Np2 and the second buffer capacitor Cb. At this time, the second buffer capacitor Cb receives the reflected voltage reflected from the secondary winding Ns to the winding Np2. Then, the second buffer capacitor Cb releases the received energy to the impedance element Ra in the
如前所述,在部份實施例中,隔離型轉換器亦可被設計為一種順向式轉換器(Forward)。第6圖為根據本揭示內容之另一實施例所述之隔離型轉換器500之示意圖。於6圖中,與第1圖之實施例有關的相似元件係以相同的參考標號表示以便於理解,且相似元件之具體原理已於先前段落中詳細說明,若非與第6圖之元件間具有協同運作關係而必要介紹者,於此不再贅述。在該實施例中,輸出電路540電性連接於次級繞組Ns。輸出電路540包含輸出電感Lo、二極體Do1、Do2及輸出電容Co,且用以在繞組Np1、Np2接收輸入電壓、次級繞組Ns產生輸出電壓時,提供輸出電源至負載。As mentioned above, in some embodiments, the isolated converter can also be designed as a forward converter. FIG. 6 is a schematic diagram of an isolated converter 500 according to another embodiment of the present disclosure. In Figure 6, similar elements related to the embodiment of Figure 1 are represented by the same reference numerals for easy understanding, and the specific principles of similar elements have been described in detail in previous paragraphs, unless there is a difference between the elements in Figure 6 and Figure 6 The necessary introductions for the cooperative operation relationship will not be repeated here. In this embodiment, the
第7圖所示為根據本揭示內容之另一實施例所述之隔離型轉換器600之示意圖。於第7圖中,與第1及6圖之實施例有關的相似元件係以相同的參考標號表示以便於理解,且相似元件之具體原理已於先前段落中詳細說明,若非與第7圖之元件間具有協同運作關係而必要介紹者,於此不再贅述。FIG. 7 is a schematic diagram of an
在該實施例中,隔離型轉換器700還包含至少一個單向開關(如:單向開關701、702,可由二極體實現)。單向開關701、702電性連接於初級繞組Np。單向開關701、702的導通方向與緩衝電路130中之二極體之導通方向相反。當第一開關S1或第二開關S2關斷時,單向開關701、702用以防止電流流向第一開關S1或第二開關S2。舉例而言,當第一開關S1導通、第二開關S2關斷時,若繞組Np1、Np2的匝數不相等(如:繞組Np1匝數小於繞組Np2之匝數),則感應變壓的差異將會形成電流,而可能流過第二開關S2的寄生二極體。透過單向開關702,即可防止此一情況下的異常電流路徑。In this embodiment, the isolated converter 700 further includes at least one unidirectional switch (for example:
前述各實施例中的各項元件、方法步驟或技術特徵,係可相互結合,而不以本揭示內容中的文字描述順序或圖式呈現順序為限。Various components, method steps or technical features in the above-mentioned embodiments can be combined with each other, and are not limited by the order of description in words or presentation in drawings in the present disclosure.
雖然本揭示內容已以實施方式揭露如上,然其並非用以限定本揭示內容,任何熟習此技藝者,在不脫離本揭示內容之精神和範圍內,當可作各種更動與潤飾,因此本揭示內容之保護範圍當視後附之申請專利範圍所界定者為準。Although the content of this disclosure has been disclosed above in terms of implementation, it is not intended to limit the content of this disclosure. Anyone who is skilled in this art can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, this disclosure The scope of protection of the content shall be defined by the scope of the attached patent application.
100:隔離型轉換器 110:輸入電路 120:變壓器 130:緩衝電路 140:輸出電路 200:隔離型轉換器 300:隔離型轉換器 400:隔離型轉換器 500:隔離型轉換器 540:輸出電路 600:隔離型轉換器 700:隔離型轉換器 701-702:單向開關 S1:第一開關 S2:第二開關 C1-C2:輸入電容 Ca-Cc:緩衝電容 Co:輸出電容 Ct:中心抽頭 Ra:阻抗元件 R1-R3:阻抗元件 N1:第一節點 N2:第二節點 Na:分壓節點 Nb:節點 RL:負載 Lk:漏感 Lm:激磁電感 Np1-Np2:繞組 Np:初級繞組 Ns:次級繞組 D1-D2:二極體 Do:二極體 Do1-Do2:二極體 Vin:輸入電源100: isolated converter 110: input circuit 120: Transformer 130: snubber circuit 140: output circuit 200: isolated converter 300: isolated converter 400: isolated converter 500: isolated converter 540: output circuit 600: isolated converter 700: Isolated Converter 701-702: one-way switch S1: first switch S2: second switch C1-C2: input capacitance Ca-Cc: snubber capacitance Co: output capacitance Ct: center tap Ra: impedance element R1-R3: Impedance elements N1: the first node N2: second node Na: Voltage divider node Nb: node RL: load Lk: leakage inductance Lm: Exciting inductance Np1-Np2: winding Np: primary winding Ns: secondary winding D1-D2: Diodes Do: Diode Do1-Do2: diode Vin: input power
第1圖為根據本揭示內容之部份實施例之隔離型轉換器之示意圖。 第2A~2C圖為根據本揭示內容之部份實施例所述之隔離型轉換器之運作方式示意圖。 第3圖所示為根據本揭示內容之另一實施例所述之隔離型轉換器之示意圖。 第4圖所示為根據本揭示內容之另一實施例所述之隔離型轉換器之示意圖。 第5A~5F圖所示為根據本揭示內容之另一實施例所述之隔離型轉換器之示意圖。 第6圖為根據本揭示內容之另一實施例所述之隔離型轉換器之示意圖。 第7圖所示為根據本揭示內容之另一實施例所述之隔離型轉換器之示意圖。 FIG. 1 is a schematic diagram of an isolated converter according to some embodiments of the present disclosure. 2A-2C are schematic diagrams of the operation of the isolated converter according to some embodiments of the present disclosure. FIG. 3 is a schematic diagram of an isolated converter according to another embodiment of the present disclosure. FIG. 4 is a schematic diagram of an isolated converter according to another embodiment of the present disclosure. 5A-5F are schematic diagrams of an isolated converter according to another embodiment of the present disclosure. FIG. 6 is a schematic diagram of an isolated converter according to another embodiment of the present disclosure. FIG. 7 is a schematic diagram of an isolated converter according to another embodiment of the present disclosure.
國內寄存資訊(請依寄存機構、日期、號碼順序註記) 無 國外寄存資訊(請依寄存國家、機構、日期、號碼順序註記) 無 Domestic deposit information (please note in order of depositor, date, and number) none Overseas storage information (please note in order of storage country, institution, date, and number) none
100:隔離型轉換器 100: isolated converter
110:輸入電路 110: input circuit
120:變壓器 120: Transformer
130:緩衝電路 130: snubber circuit
140:輸出電路 140: output circuit
S1:第一開關 S1: first switch
S2:第二開關 S2: second switch
C1-C2:輸入電容 C1-C2: input capacitance
Ca-Cb:緩衝電容 Ca-Cb: snubber capacitance
Co:輸出電容 Co: output capacitance
Ra:阻抗元件 Ra: impedance element
Na:分壓節點 Na: Voltage divider node
Nb:節點 Nb: node
RL:負載 RL: load
Lk:漏感 Lk: leakage inductance
Lm:激磁電感 Lm: Exciting inductance
N1:第一節點 N1: the first node
N2:第二節點 N2: second node
Np:初級繞組 Np: primary winding
Ns:次級繞組 Ns: secondary winding
D1-D2:二極體 D1-D2: Diodes
Do:二極體 Do: Diode
Vin:輸入電源 Vin: input power
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US202163261102P | 2021-09-10 | 2021-09-10 | |
US63/261,102 | 2021-09-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
TWI787097B true TWI787097B (en) | 2022-12-11 |
TW202312641A TW202312641A (en) | 2023-03-16 |
Family
ID=85431071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW111108854A TWI787097B (en) | 2021-09-10 | 2022-03-10 | Isolated converter |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN115800751A (en) |
TW (1) | TWI787097B (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101488703A (en) * | 2008-01-15 | 2009-07-22 | 美高森美公司 | Fine tuned multiple output converter |
CN105680696A (en) * | 2014-12-08 | 2016-06-15 | 戴洛格半导体公司 | Adaptive bjt driver for switching power converter |
TW202027394A (en) * | 2019-01-14 | 2020-07-16 | 新加坡商西拉娜亞洲私人有限公司 | Active clamp circuit |
CN111585444A (en) * | 2019-02-15 | 2020-08-25 | 英飞凌科技奥地利有限公司 | Switching converter and method for operating a switching converter |
CN112865546A (en) * | 2021-03-11 | 2021-05-28 | 佛山市南海赛威科技技术有限公司 | Power converter and power supply control method and power supply control chip thereof |
-
2022
- 2022-03-10 CN CN202210233288.1A patent/CN115800751A/en active Pending
- 2022-03-10 TW TW111108854A patent/TWI787097B/en active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101488703A (en) * | 2008-01-15 | 2009-07-22 | 美高森美公司 | Fine tuned multiple output converter |
CN105680696A (en) * | 2014-12-08 | 2016-06-15 | 戴洛格半导体公司 | Adaptive bjt driver for switching power converter |
TW202027394A (en) * | 2019-01-14 | 2020-07-16 | 新加坡商西拉娜亞洲私人有限公司 | Active clamp circuit |
CN111585444A (en) * | 2019-02-15 | 2020-08-25 | 英飞凌科技奥地利有限公司 | Switching converter and method for operating a switching converter |
CN112865546A (en) * | 2021-03-11 | 2021-05-28 | 佛山市南海赛威科技技术有限公司 | Power converter and power supply control method and power supply control chip thereof |
Also Published As
Publication number | Publication date |
---|---|
CN115800751A (en) | 2023-03-14 |
TW202312641A (en) | 2023-03-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Kim et al. | A ZVZCS PWM FB DC/DC converter using a modified energy-recovery snubber | |
US8743565B2 (en) | High power converter architecture | |
US7515439B2 (en) | Low voltage stress power converter | |
US9019724B2 (en) | High power converter architecture | |
JP2009254227A (en) | Half-bridge llc resonant converter with self-driven synchronous rectifier | |
US10492283B2 (en) | High-voltage generator for an X-ray device | |
JP2007185072A (en) | Dc-dc converter | |
JPH0417567A (en) | Switching power supply circuit | |
JP5326411B2 (en) | Switching power supply | |
US6477064B1 (en) | High efficiency DC-DC power converter with turn-off snubber | |
Kim et al. | High-efficiency three-level DC–DC converter with reduced circulating current and rectifier voltage stress | |
TWI787097B (en) | Isolated converter | |
US20040179377A1 (en) | Insulating switching DC/DC converter | |
US11368095B1 (en) | Continuous load high power flyback converter | |
JP7424720B2 (en) | isolated converter | |
US20220115956A1 (en) | Flyback converter and electronic device | |
JP3658760B2 (en) | Multi-output switching power supply | |
JP2017175793A (en) | DC-DC converter | |
US20240195313A1 (en) | Power converters having synchronous rectifier circuits powered by auxiliary windings | |
Yao | AT‐type three‐level converter for wide‐range voltage application | |
TWI819586B (en) | Full-bridge phase shift converter with voltage clamping | |
US20240195312A1 (en) | Synchronous rectifier circuit powered by a portion of secondary windings | |
KR101228799B1 (en) | Power supply | |
US20230207188A1 (en) | Differential transformer based voltage converter and method thereof | |
RU2327274C1 (en) | Complete bridge converter of constant voltage with soft switching |