TWI690140B - Low loss buffer circuit、rectifier with low loss buffer circuit and converter with low loss buffer circuit - Google Patents

Low loss buffer circuit、rectifier with low loss buffer circuit and converter with low loss buffer circuit Download PDF

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TWI690140B
TWI690140B TW107124890A TW107124890A TWI690140B TW I690140 B TWI690140 B TW I690140B TW 107124890 A TW107124890 A TW 107124890A TW 107124890 A TW107124890 A TW 107124890A TW I690140 B TWI690140 B TW I690140B
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diode
snubber
cathode
anode
rectifier
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TW107124890A
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TW202008699A (en
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黃偉彬
張錫男
黃建嵐
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幸康電子股份有限公司
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    • 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

Abstract

A low loss buffer circuit includes a buffer resistor, a buffer capacitor and a buffer diode, one end of the buffer resistor is connected to the anode of the buffer diode, the interconnected node is defined as a first total node, the buffer capacitor has one end connected to the first total node, and the other end connected to the cathode of the rectifier diode, the cathode of the buffer diode is connected to a positive output, and the other end of the buffer resistor is connected to the anode of the rectifier diode, when the sharp wave voltage of the rectifier diode appears, the current flows through the buffer capacitor, the buffer diode to the positive and negative outputs to form a loop, when the rectifier diode is switched on, current discharged from the buffer capacitor flows through the positive and negative outputs, and the loop, such that the sharp wave energy will be transmitted to the output.

Description

低損耗緩衝電路、具有低損耗緩衝電路之整流器及具有低損耗緩衝電路之轉換器Low loss buffer circuit, rectifier with low loss buffer circuit and converter with low loss buffer circuit

本發明係關於一種緩衝電路，特別係關於一種低耗能之低耗損緩衝電路。The invention relates to a buffer circuit, in particular to a low-loss buffer circuit with low energy consumption.

本發明另提供一種具有低損耗緩衝電路之整流器。The invention also provides a rectifier with a low-loss buffer circuit.

本發明另提供一種具有低損耗緩衝電路之轉換器。The invention also provides a converter with a low-loss buffer circuit.

一般整流電路如順向式轉換器（Forward converter）、返馳式轉換器（Flyback converters）、中間抽頭式整流器、倍流整流器、全波整流器架構中，皆會因變壓器的漏電感、印刷電路板所產生的寄生電感、寄生電容、二極體的寄生電容在整流二極體兩端產生尖波電壓；Common rectifier circuits such as forward converters, flyback converters, center-tapped rectifiers, current doubler rectifiers, and full-wave rectifiers are all caused by transformer leakage inductance and printed circuit boards. The generated parasitic inductance, parasitic capacitance, and parasitic capacitance of the diode produce a sharp wave voltage across the rectifier diode;

前述尖波電壓往往造成電路上整流二極體的損壞、或造成電磁干擾，影響電路的特性，為此於前述電路中往往會增加RCD緩衝器(RCD snubber)以降低二極體的尖波電壓，然而傳統之RCD緩衝器非常耗能，容易發熱，如圖1所示，以一般順向式轉換器的二次側為例；The aforementioned spike voltage often causes damage to the rectifier diode on the circuit, or causes electromagnetic interference, which affects the characteristics of the circuit. For this reason, an RCD snubber is often added to the aforementioned circuit to reduce the spike voltage of the diode However, the traditional RCD buffer is very energy-consuming and easily generates heat. As shown in Figure 1, the secondary side of a general forward converter is used as an example;

次級線圈後順向串接一第一二極體51，該第一二極體51另串接一電感53及一第二二極體52，該電感53及該第二二極體52則連接該輸出電容54，而傳統的RCD緩衝器(RCD snubber)如圖1虛線所示，具有一第三二極體61、一電容62及一電阻63構成，該第三二極體61之陽極(A)連接於該第一二極體51之陰極(K)，該三二極體61之陰極(K)連接該電容62及該電阻63之其中一端，該電容62及該電組63之另一端係連接於該第二二極體52之陽極(A)。After the secondary coil, a first diode 51 is serially connected in series, an inductor 53 and a second diode 52 are further connected in series, the inductor 53 and the second diode 52 are connected in series The output capacitor 54 is connected to the conventional RCD snubber, as shown by the dotted line in FIG. 1, and has a third diode 61, a capacitor 62 and a resistor 63. The anode of the third diode 61 (A) connected to the cathode (K) of the first diode 51, the cathode (K) of the three diode 61 is connected to one end of the capacitor 62 and the resistor 63, the capacitor 62 and the electric group 63 The other end is connected to the anode (A) of the second diode 52.

如此一來，當該第一二極體51導通，第二二極體52的尖波電壓出現時，電流將流經該第三二極體61、該電容62以形成一迴路，然而，當第二二極體52由截止轉為導通時，電容62放電之電流僅能夠流經電阻63作為消耗，如此一來將造成電力之耗損，無法妥善利用電容放電之能量。In this way, when the first diode 51 is turned on and the spike voltage of the second diode 52 appears, current will flow through the third diode 61 and the capacitor 62 to form a loop, however, when When the second diode 52 is turned from off to on, the current discharged by the capacitor 62 can only flow through the resistor 63 as consumption, which will cause power consumption and cannot properly use the energy discharged by the capacitor.

為此，需要一種低損耗之緩衝電路。For this reason, a buffer circuit with low loss is needed.

本發明提供一種緩衝電路，其主要目的係能夠提供一種節能、高利用率之緩衝電路。The invention provides a buffer circuit, the main purpose of which is to provide a buffer circuit with energy saving and high utilization rate.

為達前述目的，本發明低耗損緩衝電路之第一實施例，供以與順向式轉換器、返馳式轉換器、中間抽頭式整流器、倍流整流器或全波整流器電性連接，而該低損耗緩衝電路，包括：To achieve the foregoing objective, the first embodiment of the low-loss buffer circuit of the present invention is electrically connected to a forward converter, a flyback converter, a center-tapped rectifier, a current doubler rectifier, or a full-wave rectifier. Low-loss buffer circuit, including:

一緩衝器電阻、一緩衝器電容及一緩衝器二極體，該緩衝器電阻之其中一端連接該緩衝器二極體之陽極，定義相互連接之節點為一第一總節點，該緩衝器電容之其中一端連接於該第一總節點，該緩衝器電容之另一端供以連接於一整流二極體之陰極，該緩衝器二極體之陰極供以連接於正輸出端，該緩衝器電阻之另一端則供以連接於該整流二極體之陽極。A snubber resistor, a snubber capacitor and a snubber diode, one end of the snubber resistor is connected to the anode of the snubber diode, defining a node connected to each other as a first total node, the snubber capacitor One end is connected to the first general node, the other end of the snubber capacitor is connected to the cathode of a rectifier diode, the cathode of the snubber diode is connected to the positive output, the snubber resistor The other end is connected to the anode of the rectifier diode.

本發明低耗損緩衝電路之第二實施例， 供以與順向式轉換器、返馳式轉換器、中間抽頭式整流器、倍流整流器或全波整流器電性連接，而該低損耗緩衝電路，包括：The second embodiment of the low loss buffer circuit of the present invention is provided to be electrically connected to a forward converter, a flyback converter, a center tapped rectifier, a current doubler rectifier or a full wave rectifier, and the low loss buffer circuit, include:

一緩衝器電阻、一緩衝器電容及一緩衝器二極體，該緩衝器電阻之其中一端連接該緩衝器二極體之陰極，定義相互連接之節點為一第二總節點，該緩衝器電容之其中一端亦連接於該第二總節點，該緩衝器電容之另一端供以連接於一整流二極體之陽極，該緩衝器二極體之陽極供以連接於負輸出端，該緩衝器電阻之另一端則供以連接於該整流二極體之陰極。A snubber resistor, a snubber capacitor and a snubber diode, one end of the snubber resistor is connected to the cathode of the snubber diode, defining a node connected to each other as a second total node, the snubber capacitor One end is also connected to the second total node, the other end of the snubber capacitor is connected to the anode of a rectifier diode, and the anode of the snubber diode is connected to the negative output terminal, the snubber The other end of the resistor is connected to the cathode of the rectifier diode.

藉由前述可知，於第一實施例中，當該整流二極體之尖波電壓出現時，電流將流經該緩衝器電容、該緩衝器二極體至正輸出端、負輸出端以形成一迴路，然而，當該整流二極體由截止轉為導通時，緩衝器電容放電之電流便能夠流經電感、正輸出端、負輸出端、緩衝器電阻迴路，如此一來，放電迴路將能夠經過輸出端，進而得以將尖波能量傳輸至輸出端，以達到節能、高利用率目的。As can be seen from the foregoing, in the first embodiment, when the spike voltage of the rectified diode appears, current will flow through the snubber capacitor, the snubber diode to the positive output terminal and the negative output terminal to form One loop, however, when the rectifier diode is turned from off to on, the current discharged by the snubber capacitor can flow through the inductor, positive output terminal, negative output terminal, snubber resistance circuit, so that the discharge circuit will It can pass through the output end, and then can transmit the sharp wave energy to the output end, so as to achieve the purpose of energy saving and high utilization rate.

藉由前述可知，於第二實施例中，當該整流二極體之尖波電壓出現時，電流將流經該緩衝器二極體、該緩衝器電容以形成一迴路，然而，當該整流二極體由截止轉為導通時，緩衝器電容放電之電流便能夠流經緩衝器電阻、正輸出端、負輸出端、電感以形成一迴路，如此一來，放電迴路將能夠經過輸出端，進而得以將尖波能量傳輸至輸出端，以達到節能、高利用率目的。As can be seen from the foregoing, in the second embodiment, when the spike voltage of the rectifier diode appears, current will flow through the snubber diode and the snubber capacitor to form a loop, however, when the rectifier When the diode turns from off to on, the current discharged by the snubber capacitor can flow through the snubber resistor, positive output, negative output, and inductance to form a loop. In this way, the discharge loop will be able to pass through the output. Then, the sharp wave energy can be transmitted to the output end, so as to achieve energy saving and high utilization.

本新型低損耗緩衝電路之第一實施例，如圖2、4、6、8、9、11所示，供以與順向式轉換器、返馳式轉換器、中間抽頭式整流器、倍流整流器或全波整流器電性連接，而該低損耗緩衝電路，包括：The first embodiment of the new low-loss snubber circuit, as shown in Figures 2, 4, 6, 8, 9, and 11, is provided with a forward converter, a flyback converter, a center-tapped rectifier, and a current doubler The rectifier or full-wave rectifier is electrically connected, and the low-loss buffer circuit includes:

一緩衝器電阻10、一緩衝器電容20及一緩衝器二極體30，該緩衝器電阻10之其中一端連接該緩衝器二極體30之陽極(A)，並定義相互連接之節點為一第一總節點NT1，該緩衝器電容20之其中一端亦連接於該第一總節點NT1，該緩衝器電容20之另一端供以連接於一整流二極體D之陰極(K)，該緩衝器二極體30之陰極(K)供以連接於正輸出端Vo+，該緩衝器電阻10之另一端則供以連接於該整流二極體D之陽極(A)。A snubber resistor 10, a snubber capacitor 20 and a snubber diode 30, one end of the snubber resistor 10 is connected to the anode (A) of the snubber diode 30, and the node connected to each other is defined as one In the first total node NT1, one end of the snubber capacitor 20 is also connected to the first total node NT1, and the other end of the snubber capacitor 20 is connected to the cathode (K) of a rectifier diode D. The buffer The cathode (K) of the diode 30 is connected to the positive output terminal Vo+, and the other end of the snubber resistor 10 is connected to the anode (A) of the rectifier diode D.

該整流二極體D之數量可為一個或是複數個並聯。The number of the rectifier diode D can be one or a plurality of parallel.

第一實施例的第一個態樣，為具有低損耗緩衝電路之順向式轉換器，該整流二極體D之數量為一，如圖2所述，包括：The first aspect of the first embodiment is a forward converter with a low-loss snubber circuit. The number of the rectifier diode D is one, as shown in FIG. 2, including:

一第一二極體D1，陽極(A)連接於一線圈之其中一端，該第一二極體D1之陰極(K)連接於一第一節點N1；A first diode D1, the anode (A) is connected to one end of a coil, and the cathode (K) of the first diode D1 is connected to a first node N1;

一第二二極體D2，該第二二極體D2之陰極(K)連接於該第一節點N1，該第二二極體D2之陽極(A)連接於一第二節點N2，該線圈之另一端及一負輸出端Vo-連接於該第二節點N2，於本實施態樣中，第二二極體D2為該整流二極體D；A second diode D2, the cathode (K) of the second diode D2 is connected to the first node N1, the anode (A) of the second diode D2 is connected to a second node N2, the coil The other end and a negative output terminal Vo- are connected to the second node N2. In this embodiment, the second diode D2 is the rectifying diode D;

一第一電感L1，其中一端連接於該第一節點N1，另一端連接於該正輸出端Vo+；A first inductor L1, one end of which is connected to the first node N1, and the other end is connected to the positive output terminal Vo+;

該緩衝器電容20之其中一端連接於該第一節點N1，該緩衝器二極體30之陰極(K)連接於正輸出端Vo+，該緩衝器電阻10連接於該第二節點N2。One end of the snubber capacitor 20 is connected to the first node N1, the cathode (K) of the snubber diode 30 is connected to the positive output terminal Vo+, and the snubber resistor 10 is connected to the second node N2.

較佳的，如圖10所示，於該緩衝器二極體30之陰極(K)與該緩衝器電阻10之間，另可連接一輔助電容Ca，該輔助電容Ca可做為一輔助電源。Preferably, as shown in FIG. 10, an auxiliary capacitor Ca may be connected between the cathode (K) of the buffer diode 30 and the buffer resistor 10, and the auxiliary capacitor Ca may be used as an auxiliary power supply .

第一實施例的第二個態樣，為具有低損耗緩衝電路之反馳式轉換器，該整流二極體D之數量為一，如圖4所述，包括：The second aspect of the first embodiment is a flyback converter with a low-loss snubber circuit. The number of the rectifier diode D is one, as shown in FIG. 4, including:

一第三二極體D3，陰極(K)連接於線圈之其中一端，陽極(A)連接於該負輸出端Vo-，於本實施態樣中，該第三二極體D3為該整流二極體D；A third diode D3, the cathode (K) is connected to one end of the coil, and the anode (A) is connected to the negative output terminal Vo-. In this embodiment, the third diode D3 is the rectifier diode Polar body D;

該緩衝器電容20連接於該第一總節點NT1之另一端連接於該第三二極體D3之陰極(K)，該緩衝器二極體30之陰極(K)連接於正輸出端Vo+，該緩衝器電阻10連接於該第一總節點NT1之另一端連接於該第三二極體D3之陽極(A)。The buffer capacitor 20 is connected to the other end of the first total node NT1 and to the cathode (K) of the third diode D3, and the cathode (K) of the buffer diode 30 is connected to the positive output terminal Vo+, The other end of the snubber resistor 10 is connected to the first total node NT1 and to the anode (A) of the third diode D3.

第一實施例的第三個態樣，為具有低損耗緩衝電路之中間抽頭式整流器，其中，該線圈具有一第一端S1、一第二端S2及一第三端S3，於本實施態樣中，該整流二極體D之數量為二，如圖6所示，而具有低損耗緩衝電路之中間抽頭式整流器，包括：The third aspect of the first embodiment is a center-tapped rectifier with a low-loss buffer circuit, wherein the coil has a first end S1, a second end S2, and a third end S3. In this embodiment In the sample, the number of the rectifier diode D is two, as shown in FIG. 6, and the middle-tap rectifier with a low-loss buffer circuit includes:

一第四二極體D4，陰極(K)連接於該第三端S3，陽極(A)連接於該負輸出端Vo-，於本實施態樣中，該第四二極體D4為其中一個該整流二極體D；A fourth diode D4, the cathode (K) is connected to the third terminal S3, and the anode (A) is connected to the negative output terminal Vo-, in this embodiment, the fourth diode D4 is one of them The rectifier diode D;

一第五二極體D5，陰極(K)連接於該第一端S1，陽極(A)連接於該負輸出端Vo-，於本實施態樣中，該第五二極體D5為另一個該整流二極體D；A fifth diode D5, the cathode (K) is connected to the first terminal S1, and the anode (A) is connected to the negative output terminal Vo-, in this embodiment, the fifth diode D5 is another The rectifier diode D;

一第二電感L2，其中一端連接於該第二端S2，另一端連接於該正輸出端Vo+；A second inductor L2, one end of which is connected to the second end S2, and the other end is connected to the positive output end Vo+;

該低損耗緩衝電路之數量為二，其中一個緩衝器電容20連接於該第三端S3，另一個該緩衝器電容20連接於該第一端S1，二個該緩衝器電阻10接連接於該負輸出端Vo-，二個該緩衝器二極體30之陰極(K)皆連接於該正輸出端Vo+。The number of the low-loss snubber circuit is two, one snubber capacitor 20 is connected to the third terminal S3, the other snubber capacitor 20 is connected to the first terminal S1, and the two snubber resistors 10 are connected to the The negative output terminal Vo-, the cathodes (K) of the two buffer diodes 30 are connected to the positive output terminal Vo+.

較佳的，如圖10所示，於該緩衝器二極體30之陰極(K)與該緩衝器電阻10之間，另可連接一輔助電容Ca，該輔助電容Ca可做為一輔助電源。Preferably, as shown in FIG. 10, an auxiliary capacitor Ca may be connected between the cathode (K) of the buffer diode 30 and the buffer resistor 10, and the auxiliary capacitor Ca may be used as an auxiliary power supply .

第一實施例的第四個態樣，為具有低損耗緩衝電路之倍流整流器，其中，該整流二極體D之數量為二，如圖8所示，而具有低損耗緩衝電路之倍流整流器，包括：The fourth aspect of the first embodiment is a current doubler rectifier with a low-loss buffer circuit, wherein the number of the rectifying diode D is two, as shown in FIG. 8, and the current doubler with a low-loss buffer circuit Rectifier, including:

一第六二極體D6，陽極(A)連接於負輸出端，陰極(K)連接於其中一個輸入端，於本實施態樣中，該第六二極體D6為其中一個該整流二極體D；A sixth diode D6, the anode (A) is connected to the negative output terminal, and the cathode (K) is connected to one of the input terminals. In this embodiment, the sixth diode D6 is one of the rectifier diodes Body D;

一第七二極體D7，陽極(A)連接於負輸出端，陰極(K)連接於另一個輸入端，於本實施態樣中，該第七二極體D7為另一個該整流二極體D；A seventh diode D7, the anode (A) is connected to the negative output terminal, and the cathode (K) is connected to the other input terminal. In this embodiment, the seventh diode D7 is another rectifier diode Body D;

一第三電感L3，其中一端與該第六二極體D6之陰極(K)連接，另一端連接於該正輸出端Vo+；A third inductor L3, one end of which is connected to the cathode (K) of the sixth diode D6, and the other end is connected to the positive output terminal Vo+;

一第四電感L4，其中一端與該第七二極體D7之陰極(K)連接，另一端連接於該正輸出端Vo+；A fourth inductor L4, one end of which is connected to the cathode (K) of the seventh diode D7, and the other end is connected to the positive output terminal Vo+;

該低損耗緩衝電路之數量為二，其中一個緩衝器電容20連接於該第六二極體D6之陰極(K)，另一個該緩衝器電容20連接於該第七二極體D7之陰極(K)，二個該緩衝器電阻10接連接於該負輸出端Vo-，二個該緩衝器二極體30之陰極(K)皆連接於該正輸出端Vo+。The number of the low-loss snubber circuit is two, one snubber capacitor 20 is connected to the cathode (K) of the sixth diode D6, and the other snubber capacitor 20 is connected to the cathode of the seventh diode D7 ( K), the two buffer resistors 10 are connected to the negative output terminal Vo-, and the cathodes (K) of the two buffer diodes 30 are connected to the positive output terminal Vo+.

較佳的，如圖10所示，於各該緩衝器二極體30之陰極(K)與各該緩衝器電阻10之間，另可連接該輔助電容Ca，該輔助電容Ca可做為一輔助電源。Preferably, as shown in FIG. 10, between the cathode (K) of each snubber diode 30 and each snubber resistor 10, the auxiliary capacitor Ca may be further connected, and the auxiliary capacitor Ca may be used as a Auxiliary power.

第一實施例的第五個態樣，為具有低損耗緩衝電路之全波整流器，其中，該整流二極體D之數量為四，如圖9所述，而具有低損耗緩衝電路之全波整流器，包括：The fifth aspect of the first embodiment is a full-wave rectifier with a low-loss buffer circuit, wherein the number of rectifier diodes D is four, as shown in FIG. 9, and the full-wave rectifier with a low-loss buffer circuit Rectifier, including:

一第五電感L5，其中一端連接於該正輸出端Vo+，另一端連接於一第三節點N3；A fifth inductor L5, one end of which is connected to the positive output terminal Vo+, and the other end is connected to a third node N3;

一第八二極體D8，陽極(A)連接於一第一輸入端Vi1，陰極(K)連接於該第三節點N3，於本實施態樣中，該第八二極體D8為其中一個該整流二極體D；An eighth diode D8, the anode (A) is connected to a first input terminal Vi1, and the cathode (K) is connected to the third node N3. In this embodiment, the eighth diode D8 is one of them The rectifier diode D;

一第九二極體D9，陽極(A)連接於該負輸出端Vo-，陰極(K)連接於該第一輸入端Vi1，於本實施態樣中，該第九二極體D9為其中一個該整流二極體D；A ninth diode D9, the anode (A) is connected to the negative output terminal Vo-, and the cathode (K) is connected to the first input terminal Vi1. In this embodiment, the ninth diode D9 is One of the rectifier diode D;

一第十二極體D10，陽極(A)連接於一第二輸入端Vi2，陰極(K)連接於該第三節點N3，於本實施態樣中，該第十二極體D10為其中一個該整流二極體D；A twelfth polar body D10, the anode (A) is connected to a second input terminal Vi2, and the cathode (K) is connected to the third node N3. In this embodiment, the twelfth polar body D10 is one of them The rectifier diode D;

一第十一二極體D11，陽極(A)連接於負輸出端Vo-，陰極(K)連接於該第二輸入端Vi2，於本實施態樣中，該第十一二極體D11為其中一個該整流二極體D；An eleventh diode D11, the anode (A) is connected to the negative output terminal Vo-, and the cathode (K) is connected to the second input terminal Vi2. In this embodiment, the eleventh diode D11 is One of the rectifier diode D;

該低損耗緩衝電路之數量為一，該緩衝器電容20連接於該第三節點N3，該緩衝器電阻10接連接於該第九二極體D9及第十一二極體D11之陽極(A)，該緩衝器二極體30之陰極(K)連接於正輸出端Vo+。The number of the low-loss snubber circuit is one, the snubber capacitor 20 is connected to the third node N3, and the snubber resistor 10 is connected to the anodes of the ninth diode D9 and the eleventh diode D11 (A ), the cathode (K) of the buffer diode 30 is connected to the positive output terminal Vo+.

較佳的，如圖10所示，於各該緩衝器二極體30之陰極(K)與各該緩衝器電阻10之間，另可連接該輔助電容Ca，該輔助電容Ca可做為一輔助電源。Preferably, as shown in FIG. 10, between the cathode (K) of each snubber diode 30 and each snubber resistor 10, the auxiliary capacitor Ca may be further connected, and the auxiliary capacitor Ca may be used as a Auxiliary power.

第一實施例的第六個態樣，為具有低損耗緩衝電路之中間抽頭式整流器，其中，該線圈具有該第一端S1、該第二端S2及該第三端S3，於本實施態樣中，該整流二極體D之數量為二，如圖11所示，而具有低損耗緩衝電路之中間抽頭式整流器，包括：The sixth aspect of the first embodiment is a center-tapped rectifier with a low-loss buffer circuit, wherein the coil has the first end S1, the second end S2, and the third end S3. In this embodiment In the sample, the number of the rectifier diode D is two, as shown in FIG. 11, and the middle-tap rectifier with a low-loss buffer circuit includes:

一第十二二極體D12，陽極(A)連接於該第一端S1，於本實施態樣中，該第十二二極體D12為其中一個該整流二極體D；A twelfth diode D12, the anode (A) is connected to the first end S1, in the present embodiment, the twelfth diode D12 is one of the rectifying diodes D;

一第十三二極體D13，陽極(A)連接於該第三端S3，於本實施態樣中，該第十三二極體D13為另一個該整流二極體D；A thirteenth diode D13, the anode (A) is connected to the third terminal S3, in the present embodiment, the thirteenth diode D13 is another rectifying diode D;

一第六電感L6，其中一端與該第十二二極體D12、第十三二極體D13之陰極(K)連接，另一端連接於該正輸出端Vo+；A sixth inductor L6, one end of which is connected to the cathode (K) of the twelfth diode D12 and the thirteenth diode D13, and the other end is connected to the positive output terminal Vo+;

該低損耗緩衝電路之數量為一，該緩衝器電容20連接於該第十二二極體D12、第十三二極體D13之陰極(K)，該緩衝器電阻10接連接於該負輸出端Vo-、第二端S2，該緩衝器二極體30之陰極(K)連接於該正輸出端Vo+。The number of the low-loss snubber circuit is one, the snubber capacitor 20 is connected to the cathode (K) of the twelfth diode D12 and the thirteenth diode D13, and the snubber resistor 10 is connected to the negative output The terminal Vo- and the second terminal S2, the cathode (K) of the buffer diode 30 is connected to the positive output terminal Vo+.

本新型低損耗緩衝電路之第二實施例，如圖3、5、7所示，供以與順向式轉換器、返馳式轉換器、倍流整流器電性連接，而該低損耗緩衝電路，包括：The second embodiment of the novel low-loss snubber circuit, as shown in FIGS. 3, 5, and 7, is electrically connected to a forward converter, a flyback converter, and a current doubler rectifier, and the low-loss snubber circuit ,include:

該緩衝器電阻10、該緩衝器電容20及該緩衝器二極體30，該緩衝器電阻10之其中一端連接該緩衝器二極體30之陰極(K)，並定義相互連接之節點為一第二總節點NT2，該緩衝器電容20之其中一端亦連接於該第二總節點NT2，該緩衝器電容20之另一端供以連接於該整流二極體D之陽極(A)，該緩衝器二極體30之陽極(A)供以連接於負輸出端Vo-，該緩衝器電阻10之另一端則供以連接於該整流二極體D之陰極(K)。The snubber resistor 10, the snubber capacitor 20 and the snubber diode 30, one end of the snubber resistor 10 is connected to the cathode (K) of the snubber diode 30, and the node connected to each other is defined as one In the second total node NT2, one end of the snubber capacitor 20 is also connected to the second total node NT2, and the other end of the snubber capacitor 20 is connected to the anode (A) of the rectifier diode D. The buffer The anode (A) of the diode 30 is connected to the negative output terminal Vo-, and the other end of the snubber resistor 10 is connected to the cathode (K) of the rectifier diode D.

於第二實施例的第一態樣，為具有低損耗緩衝電路之順向式轉換器，其中，該整流二極體D之數量為一，如圖3所述，包括：The first aspect of the second embodiment is a forward converter with a low-loss snubber circuit, wherein the number of the rectifier diode D is one, as shown in FIG. 3, including:

該第一二極體D1，陽極(A)連接於線圈之其中一端，該第一二極體D1之陰極(K)連接於一第四節點N4；In the first diode D1, the anode (A) is connected to one end of the coil, and the cathode (K) of the first diode D1 is connected to a fourth node N4;

該第二二極體D2，該第二二極體D2之陰極(K)連接於該第四節點N4，該第二二極體D2之陽極(A)連接於一第五節點N5，該線圈之另一端連接於該第五節點N5，於本實施態樣中，該第二二極體D2為該整流二極體D；The second diode D2, the cathode (K) of the second diode D2 is connected to the fourth node N4, the anode (A) of the second diode D2 is connected to a fifth node N5, the coil The other end is connected to the fifth node N5. In this embodiment, the second diode D2 is the rectifying diode D;

該第一電感L1，其中一端連接於該第五節點N5，另一端連接於一負輸出端Vo-；The first inductor L1 has one end connected to the fifth node N5 and the other end connected to a negative output terminal Vo-;

該緩衝器電容20之其中一端連接於該第五節點N5，該緩衝器二極體30之陽極(A)連接於負輸出端Vo-，該緩衝器電阻10連接於該第四節點N4。One end of the snubber capacitor 20 is connected to the fifth node N5, the anode (A) of the snubber diode 30 is connected to the negative output terminal Vo-, and the snubber resistor 10 is connected to the fourth node N4.

第二實施例的第二個態樣，為具有低損耗緩衝電路之反馳式轉換器，其中，該整流二極體D之數量為一，如圖5所述，包括：The second aspect of the second embodiment is a flyback converter with a low-loss buffer circuit, wherein the number of the rectifier diode D is one, as shown in FIG. 5, including:

該第三二極體D3，陽極(A)連接於一線圈之其中一端，陰極(K)連接於該正輸出端Vo+，於本實施態樣中，該第三二極體D3為該整流二極體D；In the third diode D3, the anode (A) is connected to one end of a coil, and the cathode (K) is connected to the positive output terminal Vo+. In this embodiment, the third diode D3 is the rectifier diode. Polar body D;

該緩衝器電容20連接於該第三二極體D3之陽極(A)，該緩衝器二極體30之陽極(A)連接於負輸出端Vo-，該緩衝器電阻10連接於該第三二極體D3之陰極(K)。The buffer capacitor 20 is connected to the anode (A) of the third diode D3, the anode (A) of the buffer diode 30 is connected to the negative output terminal Vo-, and the buffer resistor 10 is connected to the third The cathode (K) of diode D3.

第二實施例的第三個態樣，為具有低損耗緩衝電路之倍流整流器，其中，該整流二極體D之數量為二，如圖7所述，而具有低損耗緩衝電路之倍流整流器，包括：The third aspect of the second embodiment is a current doubler rectifier with a low-loss snubber circuit, wherein the number of the rectifier diode D is two, as shown in FIG. 7, and the current doubler with a low-loss snubber circuit Rectifier, including:

該第六二極體D6，陰極(K)連接於正輸出端Vo+，陽極(A)連接於其中一個輸入端，於本實施態樣中，該第六二極體D6為其中一個該整流二極體D；In the sixth diode D6, the cathode (K) is connected to the positive output terminal Vo+, and the anode (A) is connected to one of the input terminals. In this embodiment, the sixth diode D6 is one of the rectifier diodes. Polar body D;

該第七二極體D7，陰極(K)連接於正輸出端Vo+，陽極(A)連接於另一個輸入端，於本實施態樣中，該第七二極體D7為另一個該整流二極體D；In the seventh diode D7, the cathode (K) is connected to the positive output terminal Vo+, and the anode (A) is connected to the other input terminal. In this embodiment, the seventh diode D7 is another rectifier diode. Polar body D;

一第三電感L3，其中一端與該第六二極體D6之陽極(A)連接，另一端連接於該負輸出端Vo-；A third inductor L3, one end of which is connected to the anode (A) of the sixth diode D6, and the other end is connected to the negative output terminal Vo-;

一第四電感L4，其中一端與該第七二極體D7之陽極(A)連接，另一端連接於該負輸出端Vo-；A fourth inductor L4, one end of which is connected to the anode (A) of the seventh diode D7, and the other end is connected to the negative output terminal Vo-;

該低損耗緩衝電路之數量為二，其中一個緩衝器電容20連接於該第六二極體D6之陽極(A)，另一個該緩衝器電容20連接於該第七二極體D7之陽極(A)，二個該緩衝器電阻10接連接於該正輸出端Vo+，二個該緩衝器二極體30之陽極(A)皆連接於該負輸出端Vo-。The number of the low-loss snubber circuit is two, one snubber capacitor 20 is connected to the anode (A) of the sixth diode D6, and the other snubber capacitor 20 is connected to the anode of the seventh diode D7 ( A), the two buffer resistors 10 are connected to the positive output terminal Vo+, and the anodes (A) of the two buffer diodes 30 are connected to the negative output terminal Vo-.

以上為本發明第一實施例及第二實施例的具體結構組態與連接關係，以下則敘述其工作原理：The above is the specific structural configuration and connection relationship between the first embodiment and the second embodiment of the present invention, and the working principle is described below:

首先，以有低損耗緩衝電路之順向式轉換器為例，如圖2所示，當該第二二極體D2之尖波電壓出現時，電流將流經該緩衝器電容20、該緩衝器二極體30至正輸出端Vo+、負輸出端Vo-以形成一迴路，然而，當該第二二極體D2由截止轉為導通時，緩衝器電容20放電之電流便能夠流經第一電感L1、正輸出端Vo+、負輸出端Vo-、緩衝器電阻10迴路，如此一來，放電迴路將能夠經過輸出端，進而得以將尖波能量傳輸至輸出端，以達到節能、高利用率目的。First, taking a forward converter with a low-loss buffer circuit as an example, as shown in FIG. 2, when the spike voltage of the second diode D2 appears, current will flow through the buffer capacitor 20 and the buffer From the diode 30 to the positive output terminal Vo+ and the negative output terminal Vo- to form a loop. However, when the second diode D2 is turned from off to on, the current discharged by the buffer capacitor 20 can flow through the first An inductor L1, positive output terminal Vo+, negative output terminal Vo-, and snubber resistor 10 loops. In this way, the discharge loop will be able to pass through the output end, and then be able to transmit the sharp wave energy to the output end, to achieve energy saving and high utilization Rate purpose.

《習知技術》 第一二極體51 第二二極體52 電感53 輸出電容54 第三二極體61 電容62 電阻63 《本發明》 緩衝器電阻10 緩衝器電容20 緩衝器二極體30 整流二極體D 第一總節點NT1 第二總節點NT2 第一節點N1 第二節點N2 第三節點N3 第四節點N4 第五節點N5 第一二極體D1 第二二極體D2 第三二極體D3 第四二極體D4 第五二極體D5 第六二極體D6 第七二極體D7 第八二極體D8 第九二極體D9 第十二極體D10 第十一二極體D11 第十二二極體D12 第十三二極體D13 第一電感L1 第二電感L2 第三電感L3 第四電感L4 第五電感L5 第六電感L6 第一端S1 第二端S2 第三端S3 正輸出端Vo+ 負輸出端Vo- 第一輸入端Vi1 第二輸入端Vi2 輔助電容Ca"Known Technology" First Diode 51 Second Diode 52 Inductor 53 Output Capacitor 54 Third Diode 61 Capacitor 62 Resistor 63 "Invention" Buffer Resistor 10 Buffer Capacitor 20 Buffer Diode 30 Rectifier diode D First total node NT1 Second total node NT2 First node N1 Second node N2 Third node N3 Fourth node N4 Fifth node N5 First diode D1 Second diode D2 Third second Diode D3 Fourth Diode D4 Fifth Diode D5 Sixth Diode D6 Seventh Diode D7 Eighth Diode D8 Ninth Diode D9 Twelfth Diode D10 Eleventh Diode Body D11 Twelfth diode D12 Thirteenth diode D13 First inductance L1 Second inductance L2 Third inductance L3 Fourth inductance L4 Fifth inductance L5 Sixth inductance L6 First end S1 Second end S2 Third Terminal S3 Positive output terminal Vo+ Negative output terminal Vo- First input terminal Vi1 Second input terminal Vi2 Auxiliary capacitor Ca

圖1   為習知緩衝電路應用於順向式轉換器二次側之示意圖。 圖2   為本發明第一實施例應用於順向式轉換器二次側之示意圖。 圖3   為本發明第二實施例應用於順向式轉換器二次側之示意圖。 圖4   為本發明第一實施例應用於返馳式轉換器二次側之示意圖。 圖5   為本發明第二實施例應用於返馳式轉換器二次側之示意圖。 圖6   為本發明第一實施例應用於中間抽頭式整流器二次側之示意圖。 圖7   為本發明第二實施例應用於倍流整流器二次側之示意圖。 圖8   為本發明第一實施例應用於倍流整流器二次側之示意圖。 圖9   為本發明第一實施例應用於全波整流器二次側之示意圖。 圖10  為本發明第一實施例之較佳實施態樣的示意圖。 圖11 為本發明第一實施例應用於中間抽頭整流器二次側之示意圖。Figure 1 is a schematic diagram of the conventional buffer circuit applied to the secondary side of a forward converter. FIG. 2 is a schematic diagram of the first embodiment of the present invention applied to the secondary side of a forward converter. FIG. 3 is a schematic diagram of the second embodiment of the present invention applied to the secondary side of a forward converter. FIG. 4 is a schematic diagram of the first embodiment of the present invention applied to the secondary side of a flyback converter. FIG. 5 is a schematic diagram of the second embodiment of the present invention applied to the secondary side of a flyback converter. FIG. 6 is a schematic diagram of the first embodiment of the present invention applied to the secondary side of an intermediate-tap rectifier. FIG. 7 is a schematic diagram of the second embodiment of the present invention applied to the secondary side of the current doubler rectifier. FIG. 8 is a schematic diagram of the first embodiment of the present invention applied to the secondary side of the current doubler rectifier. FIG. 9 is a schematic diagram of the first embodiment of the present invention applied to the secondary side of a full-wave rectifier. FIG. 10 is a schematic diagram of a preferred embodiment of the first embodiment of the present invention. FIG. 11 is a schematic diagram of the first embodiment of the present invention applied to the secondary side of an intermediate-tap rectifier.

緩衝器電阻10 緩衝器電容20 緩衝器二極體30 整流二極體D 第一總節點NT1 第一節點N1 第二節點N2 第一二極體D1 第二二極體D2 第一電感L1 正輸出端Vo+ 負輸出端Vo-Snubber resistor 10 Snubber capacitor 20 Snubber diode 30 Rectifier diode D First total node NT1 First node N1 Second node N2 First diode D1 Second diode D2 First inductor L1 Positive output Terminal Vo+ negative output terminal Vo-

Claims (12)

一種低損耗緩衝電路，供以與順向式轉換器、返馳式轉換器、中間抽頭式整流器、倍流整流器或全波整流器電性連接，而該低損耗緩衝電路，包括：一緩衝器電阻、一緩衝器電容及一緩衝器二極體，該緩衝器電阻之其中一端連接該緩衝器二極體之陽極，定義相互連接之節點為一第一總節點，該緩衝器電容之其中一端連接於該第一總節點，該緩衝器電容之另一端供以連接於一整流二極體之陰極，該緩衝器二極體之陰極供以連接於正輸出端，該緩衝器電阻之另一端則供以連接於該整流二極體之陽極。 A low-loss buffer circuit for electrically connecting with a forward converter, a flyback converter, an intermediate-tap rectifier, a current doubler rectifier or a full-wave rectifier, and the low-loss buffer circuit includes: a buffer resistor , A snubber capacitor and a snubber diode, one end of the snubber resistor is connected to the anode of the snubber diode, the node connected to each other is defined as a first total node, and one end of the snubber capacitor is connected At the first general node, the other end of the snubber capacitor is connected to the cathode of a rectifier diode, the cathode of the snubber diode is connected to the positive output, and the other end of the snubber resistor is It is connected to the anode of the rectifier diode. 如申請專利範圍第1項所述之低損耗緩衝電路，其中，於該緩衝器二極體之陰極與該緩衝器電阻之間，另連接一輔助電容。 The low-loss snubber circuit as described in item 1 of the patent application scope, wherein an auxiliary capacitor is further connected between the cathode of the snubber diode and the snubber resistor. 一種順向式轉換器，包括如請求項1之低損耗緩衝電路，包括：該整流二極體之數量為一，定義該整流二極體為一第二二極體；一第一二極體，陽極連接於一線圈之其中一端，該第一二極體之陰極連接於一第一節點；該第二二極體，陰極連接於該第一節點，該第二二極體之陽極連接於一第二節點，該線圈之另一端及該負輸出端連接於該第二節點；一第一電感，其中一端連接於該第一節點，另一端連接於該正輸出端；該緩衝器電容之其中一端連接於該第一節點，該緩衝器二極體之陰極連接於該正輸出端，該緩衝器電阻連接於該第二節點。 A forward converter, including the low-loss buffer circuit according to claim 1, including: the number of the rectifying diode is one, defining the rectifying diode as a second diode; a first diode , The anode is connected to one end of a coil, the cathode of the first diode is connected to a first node; the cathode of the second diode is connected to the first node, and the anode of the second diode is connected to A second node, the other end of the coil and the negative output are connected to the second node; a first inductor, one end of which is connected to the first node, and the other end to the positive output; the buffer capacitor One end is connected to the first node, the cathode of the buffer diode is connected to the positive output terminal, and the buffer resistor is connected to the second node. 一種反馳式轉換器，包括如請求項1之低損耗緩衝電路，包括：該整流二極體之數量為一，定義該整流二極體為一第三二極體； 該第三二極體，陰極連接於一線圈之其中一端，陽極連接於該負輸出端；該緩衝器電容連接於該第一總節點之另一端連接於第三二極體之陰極(K)，該緩衝器二極體之陰極連接於正輸出端，該緩衝器電阻連接於該第一總節點之另一端連接於該第三二極體之陽極。 A flyback converter, including the low-loss buffer circuit according to claim 1, includes: the number of the rectifier diode is one, and the rectifier diode is defined as a third diode; In the third diode, the cathode is connected to one end of a coil, and the anode is connected to the negative output; the other end of the snubber capacitor is connected to the first general node and the cathode (K) of the third diode The cathode of the buffer diode is connected to the positive output terminal, and the other end of the buffer resistor is connected to the first general node to the anode of the third diode. 一種中間抽頭式整流器，包括如請求項1之低損耗緩衝電路，包括：該整流二極體之數量為二，定義二該整流二極體分別為一第四二極體及一第五二極體；一線圈，具有一第一端、一第二端及一第三端：該第四二極體，陰極連接於該第三端，陽極連接於該負輸出端；該第五二極體，陰極連接於該第一端，陽極連接於該負輸出端；一第二電感，其中一端連接於該第二端，另一端連接於該正輸出端；該低損耗緩衝電路之數量為二，其中一個緩衝器電容連接於該第三端，另一個該緩衝器電容連接於該第一端，二個該緩衝器電阻接連接於該負輸出端，二個該緩衝器二極體之陰極皆連接於該正輸出端。 An intermediate-tap rectifier, including the low-loss buffer circuit according to claim 1, includes: the number of the rectifier diode is two, and the definition is two. The rectifier diode is a fourth diode and a fifth diode respectively Body; a coil with a first end, a second end and a third end: the fourth diode, the cathode is connected to the third end, the anode is connected to the negative output; the fifth diode , The cathode is connected to the first end, the anode is connected to the negative output; a second inductor, one end is connected to the second end, and the other end is connected to the positive output; the number of the low-loss buffer circuit is two, One of the buffer capacitors is connected to the third terminal, the other of the buffer capacitors is connected to the first terminal, two of the buffer resistors are connected to the negative output terminal, and the cathodes of the two buffer diodes are both Connect to the positive output. 一種倍流整流器，包括如請求項1之低損耗緩衝電路，包括：該整流二極體之數量為二，定義二該整流二極體分別為一第六二極體及一第七二極體；該第六二極體，陽極連接於該負輸出端，陰極連接於其中一個輸入端；該第七二極體，陽極連接於該負輸出端，陰極連接於另一個輸入端；一第三電感，其中一端與該第六二極體之陰極連接，另一端連接於該正輸出端； 一第四電感，其中一端與該第七二極體之陰極連接，另一端連接於該正輸出端；該低損耗緩衝電路之數量為二，其中一個緩衝器電容連接於該第六二極體之陰極，另一個該緩衝器電容連接於該第七二極體之陰極，二個該緩衝器電阻接連接於該負輸出端，二個該緩衝器二極體之陰極皆連接於該正輸出端。 A current doubler rectifier, including the low-loss buffer circuit according to claim 1, including: the number of the rectifying diode is two, and the definition two is a sixth diode and a seventh diode respectively The sixth diode, the anode is connected to the negative output terminal, and the cathode is connected to one of the input terminals; the seventh diode, the anode is connected to the negative output terminal, and the cathode is connected to the other input terminal; a third Inductance, one end of which is connected to the cathode of the sixth diode, and the other end is connected to the positive output end; A fourth inductor, one end of which is connected to the cathode of the seventh diode and the other end is connected to the positive output; the number of the low-loss snubber circuit is two, and one snubber capacitor is connected to the sixth diode Cathode, the other of the snubber capacitor is connected to the cathode of the seventh diode, two of the snubber resistors are connected to the negative output, and the cathodes of two of the snubber diodes are connected to the positive output end. 一種全波整流器，包括如請求項1之低損耗緩衝電路，包括：該整流二極體之數量為四，定義四該整流二極體分別為一第八二極體、一第九二極體、一第十二極體及一第十一二極體；一第五電感，其中一端連接於該正輸出端，另一端連接於一第三節點；該第八二極體，陽極連接於一第一輸入端，陰極連接於該第三節點；該第九二極體，陽極連接於該負輸出端，陰極連接於該第一輸入端；該第十二極體，陽極連接於一第二輸入端，陰極連接於該第三節點；該第十一二極體，陽極連接於負輸出端，陰極連接於該第二輸入端；該低損耗緩衝電路之數量為一，該緩衝器電容連接於該第三節點，該緩衝器電阻接連接於該第九二極體及第十一二極體之陽極，該緩衝器二極體之陰極連接於正輸出端。 A full-wave rectifier, including the low-loss buffer circuit according to claim 1, includes: the number of the rectifier diode is four, and the definition of the four rectifier diodes is one eighth diode and one ninth diode respectively , A twelfth diode and an eleventh diode; a fifth inductor, one end of which is connected to the positive output end, and the other end is connected to a third node; the eighth diode, the anode is connected to a The first input terminal, the cathode is connected to the third node; the ninth diode, the anode is connected to the negative output terminal, the cathode is connected to the first input terminal; the twelfth diode, the anode is connected to a second The input terminal, the cathode is connected to the third node; the eleventh diode, the anode is connected to the negative output terminal, and the cathode is connected to the second input terminal; the number of the low-loss buffer circuit is one, and the buffer capacitor is connected At the third node, the buffer resistor is connected to the anodes of the ninth diode and the eleventh diode, and the cathode of the buffer diode is connected to the positive output terminal. 一種中間抽頭式整流器，包括如請求項1之低損耗緩衝電路，包括：該整流二極體之數量為二，定義二該整流二極體分別為一第十二二極體及一第十三二極體；一線圈，具有一第一端、一第二端及一第三端：該第十二二極體，陽極連接於該第一端；該第十三二極體，陽極連接於該第三端； 一第六電感，其中一端，其中一端與該第十二二極體、第十三二極體之陰極連接，另一端連接於該正輸出端；該低損耗緩衝電路之數量為一，該緩衝器電容連接於該第十二二極體、第十三二極體之陰極，該緩衝器電阻接連接於該負輸出端、第二端，該緩衝器二極體3之陰極連接於該正輸出端。 A center-tapped rectifier, including the low-loss buffer circuit according to claim 1, including: the number of the rectifier diode is two, the definition of the rectifier diode is a twelfth diode and a thirteenth diode, respectively Diode; a coil with a first end, a second end and a third end: the twelfth diode, the anode is connected to the first end; the thirteenth diode, the anode is connected to The third end; A sixth inductor, one end of which is connected to the cathodes of the twelfth diode and the thirteenth diode, and the other end is connected to the positive output; the number of the low-loss buffer circuit is one, the buffer The capacitor is connected to the cathodes of the twelfth diode and the thirteenth diode. The snubber resistor is connected to the negative output terminal and the second end. The cathode of the snubber diode 3 is connected to the positive Output. 一種低損耗緩衝電路，供以與順向式轉換器、返馳式轉換器、中間抽頭式整流器、倍流整流器或全波整流器電性連接，而該低損耗緩衝電路，包括：一緩衝器電阻、一緩衝器電容及一緩衝器二極體，該緩衝器電阻之其中一端連接該緩衝器二極體之陰極，定義相互連接之節點為一第二總節點，該緩衝器電容之其中一端亦連接於該第二總節點，該緩衝器電容之另一端供以連接於一整流二極體之陽極，該緩衝器二極體之陽極供以連接於負輸出端，該緩衝器電阻之另一端則供以連接於該整流二極體之陰極。 A low-loss buffer circuit for electrically connecting with a forward converter, a flyback converter, an intermediate-tap rectifier, a current doubler rectifier or a full-wave rectifier, and the low-loss buffer circuit includes: a buffer resistor , A snubber capacitor and a snubber diode, one end of the snubber resistor is connected to the cathode of the snubber diode, the node connected to each other is defined as a second total node, and one end of the snubber capacitor is also Connected to the second total node, the other end of the snubber capacitor is connected to the anode of a rectifier diode, the anode of the snubber diode is connected to the negative output, and the other end of the snubber resistor It is connected to the cathode of the rectifier diode. 一種順向式轉換器，包括如請求項9之低損耗緩衝電路，包括：該整流二極體之數量為一，定義該整流二極體為一第二二極體；一第一二極體，陽極連接於一線圈之其中一端，該第一二極體之陰極連接於一第四節點；該第二二極體，陰極連接於該第四節點，該第二二極體之陽極連接於一第五節點，該線圈之另一端連接於該第五節點；一第一電感，其中一端連接於該第五節點，另一端連接於該負輸出端； 該緩衝器電容之其中一端連接於該第五節點，該緩衝器二極體之陽極連接於負輸出端，該緩衝器電阻連接於該第四節點。 A forward converter, including the low-loss buffer circuit according to claim 9, including: the number of the rectifying diode is one, defining the rectifying diode as a second diode; a first diode , The anode is connected to one end of a coil, the cathode of the first diode is connected to a fourth node; the second diode, the cathode is connected to the fourth node, and the anode of the second diode is connected to A fifth node, the other end of the coil is connected to the fifth node; a first inductor, one end of which is connected to the fifth node, and the other end is connected to the negative output terminal; One end of the snubber capacitor is connected to the fifth node, the anode of the snubber diode is connected to the negative output terminal, and the snubber resistor is connected to the fourth node. 一種反馳式轉換器，包括如請求項9之低損耗緩衝電路，包括：該整流二極體之數量為一，定義該整流二極體為一第三二極體；該第三二極體，陽極連接於一線圈之其中一端，陰極連接於該正輸出端；該緩衝器電容，連接於該第三二極體之陽極，該緩衝器二極體之陽極連接於負輸出端，該緩衝器電阻連接於該第三二極體之陰極。 A flyback converter, including the low-loss buffer circuit according to claim 9, includes: the number of the rectifying diode is one, defining the rectifying diode as a third diode; the third diode , The anode is connected to one end of a coil, the cathode is connected to the positive output; the buffer capacitor is connected to the anode of the third diode, the anode of the buffer diode is connected to the negative output, the buffer The resistor is connected to the cathode of the third diode. 一種倍流整流器，包括如請求項9之低損耗緩衝電路，包括：該整流二極體之數量為二，定義該整流二極體分別為一第六二極體及一第七二極體；該第六二極體，陰極連接於正輸出端，陽極連接於其中一個輸入端；該第七二極體，陰極連接於正輸出端，陽極連接於另一個輸入端；一第三電感，其中一端與該第六二極體之陽極連接，另一端連接於該負輸出端；一第四電感，其中一端與該第七二極體之陽極連接，另一端連接於該負輸出端；該低損耗緩衝電路之數量為二，其中一個緩衝器電容連接於該第六二極體之陽極，另一個該緩衝器電容連接於該第七二極體之陽極，二個該緩衝器電阻接連接於該正輸出端，二個該緩衝器二極體之陽極皆連接於該負輸出端。 A current doubler rectifier, including the low-loss buffer circuit according to claim 9, includes: the number of the rectifier diode is two, and the rectifier diode is defined as a sixth diode and a seventh diode, respectively; In the sixth diode, the cathode is connected to the positive output terminal, and the anode is connected to one of the input terminals; in the seventh diode, the cathode is connected to the positive output terminal and the anode is connected to the other input terminal; a third inductor, in which One end is connected to the anode of the sixth diode, and the other end is connected to the negative output; a fourth inductor, wherein one end is connected to the anode of the seventh diode, and the other end is connected to the negative output; the low The number of loss snubber circuits is two, one snubber capacitor is connected to the anode of the sixth diode, the other snubber capacitor is connected to the anode of the seventh diode, and the two snubber resistors are connected to The positive output terminal and the anodes of the two buffer diodes are connected to the negative output terminal.
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