TWI578683B - Single stage High Power Factor Dual-forward Converter - Google Patents

Single stage High Power Factor Dual-forward Converter Download PDF

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TWI578683B
TWI578683B TW104137798A TW104137798A TWI578683B TW I578683 B TWI578683 B TW I578683B TW 104137798 A TW104137798 A TW 104137798A TW 104137798 A TW104137798 A TW 104137798A TW I578683 B TWI578683 B TW I578683B
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switch
capacitor
power factor
circuit
factor correction
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TW104137798A
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TW201720032A (en
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張永農
詹舜宇
王派挺
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國立虎尾科技大學
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Description

單級高功因之雙順向式轉換器 Single-stage high-power double-parallel converter

本發明係關於一種電力轉換器，尤指一種單級高功因之雙順向轉換器。 The present invention relates to a power converter, and more particularly to a single-stage high power dual forward converter.

電力轉換電路的目的是為負載提供符合需求及高品質的電力來源，於既有的電力轉換電路中常見的是雙級或多級的電力轉換電路。既有電力轉換電路主要的改進目標主要包含以下幾項重要因素：各級電路中的各項元件間所造成電力轉換時的功率損失、零電壓切換、減少電壓突波，以及元件數量及成本。 The purpose of the power conversion circuit is to provide a load and a high quality power source for the load. In the existing power conversion circuit, a two-stage or multi-stage power conversion circuit is common. The main improvement targets of the existing power conversion circuit mainly include the following important factors: power loss during power conversion, zero voltage switching, voltage surge reduction, component quantity and cost caused by various components in each stage circuit.

為改善傳統硬切方式的轉換器功率耗損、電壓突波等缺陷，現有一種雙順向式轉換器，請參閱圖1，其大致電路結構包含一輸入電源電力、一功因修正電路、二變壓器T001、T002及二整流電路，其中，該功因修正電路係與該二變壓器的一次側電連接，以一切換開關S001之開閉決定電感L001及電容C001之儲能及釋能，並由該功因修正電路須設置二組切換開關S002~S005及二組重置二極體D002~D005，以切換該二組切換開關決定該電容C001分別對該二變壓器T001、T002釋能，而分別透過該二整流電路輸出給外部的負載。 In order to improve the defect of power loss and voltage surge of the conventional hard-cutting mode, a double-parallel converter is known. Referring to FIG. 1, the approximate circuit structure includes an input power supply, a power factor correction circuit, and a second transformer. T 001 , T 002 and two rectifier circuits, wherein the power correction circuit is electrically connected to the primary side of the two transformers, and the energy storage and release of the inductor L 001 and the capacitor C 001 are determined by opening and closing of the switch S 001 And the power factor correction circuit shall be provided with two sets of switch S 002 ~ S 005 and two sets of reset diodes D 002 ~ D 005 to switch the two sets of switch to determine the capacitor C 001 respectively for the two transformers T 001 and T 002 release energy, and are respectively output to an external load through the two rectifier circuits.

現有的雙順向式轉換器雖有助於改善硬切方式所造成的電壓突波，但具有以下種種缺陷： The existing dual-parallel converters help to improve the voltage surge caused by the hard-cut method, but have the following drawbacks:

1.須使用2個變壓器、9個二極體及5個切換開關，元件數量遽增，大幅佔據電路面積。 1. Two transformers, nine diodes and five switchers must be used, and the number of components increases, which greatly occupies the circuit area.

2.其變壓器僅操作於第一象限，利用率低。 2. The transformer operates only in the first quadrant and has low utilization.

3.切換開關不具有零電壓切換之特性進一步減少效能利用，且需要多個重置二極體進行電能回收，又進一步增加元件成本及電路面積。 3. The switch does not have the characteristics of zero voltage switching to further reduce the efficiency utilization, and requires multiple reset diodes for power recovery, further increasing component cost and circuit area.

有鑒於現有雙順向式轉換器元件多、佔據面積大及不具有零電壓切換之缺陷，本發明係提出一種單級高功因之雙順向式轉換器，以減少元件數量、減小電路面積，保有零電壓切換之特性。 In view of the defects of the existing double-parallel converter components, large occupied area and no zero voltage switching, the present invention proposes a single-stage high-power double-parallel converter to reduce the number of components and reduce the circuit. The area has the characteristics of zero voltage switching.

欲達上述目的，係令該單級高功因之雙順向式轉換器包含有：一輸入電源電路；二組主動式功因修正電路，係與該輸入電源電路構成電性連接，且各組主動式功因修正電路包含一電感、一二極體、一電容及一切換開關，以該二組主動式功因修正電路的二切換開關之開閉決定對應電感及電容之儲能與釋能；一組順向式切換電路，係與該二組主動式功因修正電路電性連接，其中，該組順向切換電路包含一變壓器及至少一切換開關，並以切換該至少一切換開關，而選擇式使該二組主動式功因修正電路之電感、電容與該變壓器之一次側構成電性連接；一整流電路，係連接於該組順向式切換電路的變壓器二次側，以提供一外部的負載電能。 To achieve the above purpose, the single-stage high-power double-parallel converter includes: an input power supply circuit; and two sets of active power factor correction circuits, which are electrically connected to the input power supply circuit, and each The active power factor correction circuit comprises an inductor, a diode, a capacitor and a switch, and the energy storage and discharge of the corresponding inductor and capacitor are determined by the opening and closing of the two switches of the two active power correction circuits. a set of forward switching circuits electrically connected to the two sets of active power factor correction circuits, wherein the set of forward switching circuits includes a transformer and at least one switch, and switches the at least one switch The selection method electrically connects the inductance and the capacitance of the two sets of active power factor correction circuits to the primary side of the transformer; a rectifier circuit is connected to the secondary side of the transformer of the group of forward switching circuits to provide An external load of electrical energy.

本發明係以二組主動式功因修正電路配合一組順向式切換電路進行轉換，可減少變壓器之使用，減少元件數量並縮小電路體積，且基於上述 電路結構，可於各切換開關在切換時，由激磁電流經由切換開關的本質二極體回收至對應電容，進一步省去重置二極體之使用，並可使切換開關具有零電壓切換之特性。 The invention converts two sets of active power factor correction circuits with a set of forward switching circuits, which can reduce the use of transformers, reduce the number of components and reduce the circuit volume, and based on the above The circuit structure can recover the excitation current through the essential diode of the switch to the corresponding capacitor when the switch is switched, further eliminating the use of the reset diode and making the switch have zero voltage switching characteristics. .

T001、T002‧‧‧變壓器 T 001 , T 002 ‧‧‧ transformer

S001~S005‧‧‧切換開關 S 001 ~S 005 ‧‧‧Toggle switch

L001~L003‧‧‧電感 L 001 ~L 003 ‧‧‧Inductance

C001、C002‧‧‧電容 C 001 , C 002 ‧ ‧ capacitor

D001~D009‧‧‧二極體 D 001 ~D 009 ‧‧‧II

10‧‧‧輸入電源電路 10‧‧‧Input power circuit

11‧‧‧整流電路 11‧‧‧Rectifier circuit

12‧‧‧防逆壓電路 12‧‧‧Anti-reverse voltage circuit

20‧‧‧主動式功因修正電路 20‧‧‧Active power factor correction circuit

30‧‧‧順向式切換電路 30‧‧‧ directional switching circuit

40‧‧‧整流電路 40‧‧‧Rectifier circuit

50‧‧‧負載 50‧‧‧ load

T1‧‧‧變壓器 T 1 ‧‧‧Transformer

S1、S2、S3‧‧‧切換開關 S 1 , S 2 , S 3 ‧ ‧ switch

C1、C2、CO‧‧‧電容 C 1 , C 2 , C O ‧‧‧ capacitor

L1、L2、LO‧‧‧電感 L 1 , L 2 , L O ‧‧‧Inductors

D1、D2、DO1、DO2‧‧‧二極體 D 1 , D 2 , D O1 , D O2 ‧‧‧ diode

圖1：為現有雙順向式轉換器之電路示意圖。 Figure 1: Schematic diagram of the circuit of an existing dual-parallel converter.

圖2：為本發明電路示意圖。 Figure 2 is a schematic diagram of the circuit of the present invention.

圖3：為本發明電路切換波形示意圖。 FIG. 3 is a schematic diagram of a circuit switching waveform of the present invention.

圖4：為本發明電路之電流波形示意圖。 Figure 4 is a schematic diagram showing the current waveform of the circuit of the present invention.

圖5~圖8：為本發明各操作模式之電路示意圖。 5 to 8 are schematic diagrams of circuits of various operation modes of the present invention.

請配合參閱圖2，本發明單級高功因之雙順向式轉換器包含有：一輸入電源電路10；二組主動式功因修正電路20，係與該輸入電源電路10構成電性連接，且各組主動式功因修正電路20包含一電感L1、L2、一二極體D1、D2、一電容C1、C2及一切換開關S1、S2，其詳細電路容後說明；一組順向式切換電路30，係與該二組主動式功因修正電路20電性連接，其中，該組順向切換電路30包含一變壓器T1及至少一切換開關S3，並以切換該至少一切換開關S3，而選擇式使該二組主動式功因修正電路20之電感L1、L2、電容C1、C2與該變壓器T1之一次側構成電性連接；一整流電路40，係連接於該組順向式切換電路30的變壓器T1二次側，以提供一外部的負載50電能。 Referring to FIG. 2, the single-stage high-power double-parallel converter of the present invention comprises: an input power supply circuit 10; two sets of active power factor correction circuits 20 are electrically connected to the input power supply circuit 10. And each group of active power factor correction circuit 20 includes an inductor L 1 , L 2 , a diode D 1 , D 2 , a capacitor C 1 , C 2 and a switch S 1 , S 2 , the detailed circuit thereof A group of forward switching circuits 30 are electrically connected to the two sets of active power factor correction circuits 20, wherein the group of forward switching circuits 30 includes a transformer T 1 and at least one switch S 3 . and to switch the at least one switch S 3, and selective so that the two sets of active power factor inductance correction circuit 20 of the L 1, L 2, capacitors C 1, C 2 constituting the electrically one of the primary side of the transformer T A rectifying circuit 40 is connected to the secondary side of the transformer T 1 of the set of forward switching circuits 30 to provide an external load 50 of electrical energy.

於本實施例中，該輸入電源電路10包含一輸入電源AC、一整流電路11及一防逆壓電路12，該整流電路11包含二個二極體，且該二個二極體順偏連接於該輸入電源AC及該二組主動式功因修正電路20之間，該防逆壓電路12包含二個二極體，且該二個二極體逆偏連接於該輸入電源AC及該二組主動式功因修正電路20之間。 In the embodiment, the input power supply circuit 10 includes an input power supply AC, a rectifying circuit 11 and an anti-back voltage circuit 12, the rectifying circuit 11 includes two diodes, and the two diodes are biased. Connected between the input power source AC and the two sets of active power factor correction circuits 20, the anti-back voltage circuit 12 includes two diodes, and the two diodes are reversely connected to the input power source AC and The two sets of active power factor correction circuits 20 are between.

於本實施例中，該變壓器T1為一單相三線式變壓器，且該整流電路40包含二個二極體DO1、DO2、一濾波電感LO及一濾波電容CO，該二個二極體係設置於該單相三線式變壓器二次側的正、負二極上，該濾波電感LO及該濾波電容CO則串接，並透過該二個二極體DO1、DO2與該單相三線式變壓器二次側的正、負二極及中性線構成迴路。 In this embodiment, the transformer T 1 is a single-phase three-wire transformer, and the rectifier circuit 40 includes two diodes D O1 , D O2 , a filter inductor L O and a filter capacitor C O . The two-pole system is disposed on the positive and negative poles of the secondary side of the single-phase three-wire transformer, and the filter inductor L O and the filter capacitor C O are connected in series and pass through the two diodes D O1 , D O2 and The positive and negative dipoles and the neutral line on the secondary side of the single-phase three-wire transformer form a loop.

以下謹進一步詳細說明上述主動式功因修正電路，於本實施例中，各組主動式功因修正電路20中，電感L1(L2)、二極體及電容C1(C2)係三者串連後與該輸入電源構成迴路，對應的切換開關S1(S2)則跨接於對應電容C1(C2)，以於開閉該二組主動式功因修正電路20的切換開關S1、S2而決定對應電感L1、L2與電容C1、C2之儲能與釋能。 In the following, the active power factor correction circuit is further described in detail. In this embodiment, each group of active power factor correction circuits 20 has an inductance L 1 (L 2 ), a diode, and a capacitance C 1 (C 2 ). After the three are connected in series, the input power source forms a loop, and the corresponding switch S 1 (S 2 ) is connected across the corresponding capacitor C 1 (C 2 ) to open and close the switching of the two sets of active power factor correction circuits 20 . The switches S 1 and S 2 determine the energy storage and release energy of the corresponding inductors L 1 and L 2 and the capacitors C 1 and C 2 .

請進一步配合參看圖3，上述該二組主動式功因修正電路的二個切換開關開閉之相位相差180度，實作上係分別以相角差180度的PWM訊號分別觸發該二組主動式功因修正電路的二個切換開關。該組順向式切換電路的切換開關則與其中一組主動式功因修正電路的切換開關同相位開閉。 Please further refer to FIG. 3, in which the two switching switches of the two sets of active power factor correction circuits are 180 degrees out of phase, and the two sets of active signals are respectively triggered by PWM signals with phase angle difference of 180 degrees. Two switching switches for the power correction circuit. The switching switch of the group of forward switching circuits is opened and closed in phase with the switching switch of one of the active power factor correcting circuits.

請進一步配合參閱圖4，如上述當該二組主動式功因修正電路的二個切換開關開閉之相位相差為180度時，該二組主動式功因修正電路對應的電感L1、L2之儲放能電流iL1、iL2將分別形成兩個相差180度之三角波，而輸入即為該二電感的加總iL1+iL2，故於兩三角波交疊下，輸入電流將近似於一正弦波，相當於電感操作於連續電流模式(CCM)，進而可達到高功因之效果。 Please further refer to FIG. 4. As described above, when the phase difference between the two switching switches of the two sets of active power factor correction circuits is 180 degrees, the inductances L 1 and L 2 corresponding to the two sets of active power factor correction circuits are used. The storage currents i L1 and i L2 will form two triangular waves 180 degrees apart, and the input is the sum of the two inductors i L1 +i L2 , so the input current will be approximated when the two triangles overlap. A sine wave, equivalent to the inductor operating in continuous current mode (CCM), can achieve high power efficiency.

以下進一步說明本發明單級高功因之雙順向式轉換器各個切換模式，請進一步配合參閱圖5，當其中一組主動式功因修正電路的切換開關S1及該組順向式切換電路的切換開關S3同時導通時，輸入電源對電感L1充電，同時，電感L2對電容C2釋能，而此時，電容C1可經由切換開關S3對變壓器一次側輸出能量，藉此，電容C1之能量便經由該變壓器傳遞至二次側，由整流二極體DO1、濾波電感LO、濾波電容CO供應至該外部的負載。 The following describes the switching modes of the single-stage high-power double-parallel converter of the present invention. Please refer to FIG. 5 further, when one of the active power factor correction circuit switches S 1 and the group of forward switching switch circuit S 3 simultaneously turned on, the input power to the inductor L 1 charge, while the inductance L 2 of the capacitor C 2 discharging, at a time, the capacitor C 1 via the switch S 3 to the primary side of the output transformer of energy, whereby, the energy of the capacitor C 1 will be transferred to the secondary side through the transformer, supplied by the rectifier diode D O1, filter inductor L O, O filtering capacitor C to the external load.

再請進一步配合參閱圖6，承上述切換模式後，當該二組主動式功因修正電路的切換開關S1、S2及該組順向式切換電路的切換開關S3都為開路時，此時該變壓器之激磁電流會經由切換開關S2之本質二極體回收至電容C2，激磁電流回收的過程會幫助切換開關S2達成零電壓切換。濾波電感LO與CO進行釋能供應該外部負載能量。 Then ask further referring to FIG. 6, the bearing of the switching mode, when the two groups of active power factor switch S correction circuit 1, S 2, and the switch of the set of forward type switching circuit S. 3 are open, At this time, the excitation current of the transformer is recovered to the capacitor C 2 via the intrinsic diode of the switch S 2 , and the process of the excitation current recovery helps the switch S2 to achieve zero voltage switching. The filter inductors L O and C O are discharged to supply the external load energy.

再請進一步配合參閱圖7，當切換開關S2導通、切換開關S1、S3開路時，該輸入電源對電感L2充電，並同時由電感L1對電容C1釋能，而電容C2則經由切換開關S2對變壓器一次側輸出能量，電容C2之能量藉由變壓器傳遞至二次側後，經由整流二極體DO2、濾波電感LO、濾波電容CO供應至該外部的負載。 Then ask further referring to FIG. 7, when the switch S 2 is turned on, the switching switches S 1, when the S 3 is open, the input power source L 2 charging inductance, the same time to the inductance L 1 of the capacitor C. 1 release, and capacitor C 2 is passed via a switch S 2 side of the output transformer primary energy, energy of capacitor C 2 by the transformer to a secondary side post, to the external supply through the rectifying diode D O2, filter inductor L O, O filter capacitor C Load.

再請進一步配合參閱圖8，當切換開關S1、S2、S3又再次三者皆為開路時，變壓器之激磁電流將經由切換開關S3之本質二極體回收至電容C1，激磁電流回收的過程同樣會幫助切換開關S3達成零電壓切換。而濾波電感LO與濾波電容CO進行釋能供應外部負載能量。 Please further refer to FIG. 8. When the switches S 1 , S 2 , and S 3 are again open, the excitation current of the transformer will be recovered to the capacitor C 1 via the intrinsic diode of the switch S 3 , and the excitation is performed. The process of current recovery also helps switch S 3 to achieve zero voltage switching. The filter inductor L O and the filter capacitor C O are discharged to supply external load energy.

綜合上述本發明單級高功因之雙順向式轉換器之優點： Combining the advantages of the above-described single-stage high-power double-parallel converter of the present invention:

1.相較於現有技術中的雙順向式轉換器，本發明元件上節省了5個二極體、2個切換開關及1個變壓器。除可節省成本以外，亦有效縮小電路佔據面積。 1. Compared to the prior art double-parallel converter, the device of the invention saves 5 diodes, 2 switching switches and 1 transformer. In addition to cost savings, it also effectively reduces the circuit footprint.

2.除節省1個變壓器之使用以外，本發明單級高功因之雙順向式轉換器中的變壓器操作在第一、第三象限，也提高了變壓器的鐵芯利用率，有助於提升功率密度。 2. In addition to saving the use of one transformer, the transformer in the single-stage high-power double-parallel converter of the present invention operates in the first and third quadrants, and also improves the utilization of the core of the transformer, which contributes to Increase power density.

3.誠如上述各個切換模式所提及，當三個切換開關皆為開路時，激磁電流將透過對應切換開關的本質二極體回收至對應電容，如此，不但可以節省重置二極體之使用，亦可使對應切換開關達到零電壓切換之功效。 3. As mentioned in the above switching modes, when all three switching switches are open, the excitation current will be recovered to the corresponding capacitor through the essential diode of the corresponding switching switch, thus saving the reset diode. It can also make the corresponding switch achieve zero voltage switching effect.

4.除此之外本發明利用二組主動式功因修正電路的電感分攤輸入電流，可使電感不易飽和，故本發明之電路能夠應用於大功率之場合。 4. In addition, the present invention utilizes the inductance of the two sets of active power factor correction circuits to share the input current, so that the inductor is not easily saturated, so the circuit of the present invention can be applied to high power applications.

10‧‧‧輸入電源電路 10‧‧‧Input power circuit

11‧‧‧整流電路 11‧‧‧Rectifier circuit

12‧‧‧防逆壓電路 12‧‧‧Anti-reverse voltage circuit

20‧‧‧主動式功因修正電路 20‧‧‧Active power factor correction circuit

30‧‧‧順向式切換電路 30‧‧‧ directional switching circuit

40‧‧‧整流電路 40‧‧‧Rectifier circuit

50‧‧‧負載 50‧‧‧ load

T1‧‧‧變壓器 T1‧‧‧ transformer

S1、S2、S3‧‧‧切換開關 S1, S2, S3‧‧‧ switch

C1、C2、CO‧‧‧電容 C1, C2, CO‧‧‧ capacitors

L1、L2、LO‧‧‧電感 L1, L2, LO‧‧‧ inductance

D1、D2、DO1、DO2‧‧‧二極體 D1, D2, DO1, DO2‧‧‧ diode

Claims (6)

一種單級高功因之雙順向式轉換器，係包含有：一輸入電源電路；二組主動式功因修正電路，係與該輸入電源電路構成電性連接，且各組主動式功因修正電路包含一電感、一二極體、一電容及一切換開關，以該二組主動式功因修正電路的二切換開關之開閉決定對應電感及電容之儲能與釋能；一組順向式切換電路，係與該二組主動式功因修正電路電性連接，其中，該組順向切換電路包含一變壓器及至少一切換開關，並以切換該至少一切換開關，而選擇式使該二組主動式功因修正電路之電感、電容與該變壓器之一次側構成電性連接；一整流電路，係連接於該組順向式切換電路的變壓器二次側，以提供一外部的負載電能；其中該二組主動式功因修正電路的二個切換開關開閉之相位相差180度，該組順向式切換電路的切換開關則與其中一組主動式功因修正電路的切換開關同相位開閉。 A single-stage high-power double-parallel converter includes: an input power supply circuit; two sets of active power factor correction circuits are electrically connected with the input power supply circuit, and each group of active power factors The correction circuit comprises an inductor, a diode, a capacitor and a switch, and the energy storage and discharge of the corresponding inductor and capacitor are determined by the opening and closing of the two switches of the two active power correction circuits; The switching circuit is electrically connected to the two sets of active power factor correction circuits, wherein the group of forward switching circuits includes a transformer and at least one switch, and switches the at least one switch, and the selection The inductance and capacitance of the two sets of active power factor correction circuits are electrically connected with the primary side of the transformer; a rectifier circuit is connected to the secondary side of the transformer of the group of forward switching circuits to provide an external load power The phase of the two switching switches of the two active power factor correction circuits is 180 degrees out of phase, and the switching switch of the group of forward switching circuits is combined with one of the active power factor correction circuits. The switch opened and closed in phase. 如請求項1所述的單級高功因之雙順向式轉換器，輸入電源電路包含：一輸入電源；一整流電路，包含二個二極體，該二個二極體順偏連接於該輸入電源及該二組主動式功因修正電路之間；及一防逆壓電路，包含二個二極體，且該二個二極體逆偏連接於該輸入電源及該二組主動式功因修正電路之間。 The single-stage high-power double-parallel converter according to claim 1, wherein the input power circuit comprises: an input power source; and a rectifier circuit comprising two diodes, the two diodes are connected in a forward manner The input power source and the two sets of active power factor correction circuits; and a back pressure prevention circuit comprising two diodes, wherein the two diodes are reversely connected to the input power source and the two groups of active The power factor is corrected between the circuits. 如請求項1或2所述的單級高功因之雙順向式轉換器，該組順向式切換電路的變壓器為一單相三線式變壓器。 The single-stage high-power double-parallel converter according to claim 1 or 2, wherein the transformer of the group of forward switching circuits is a single-phase three-wire transformer. 如請求項3所述的單級高功因之雙順向式轉換器，該整流電路包含二個二極體、一濾波電感及一濾波電容，該整流電路二個二極體係設置於該單相三線式變壓器二次側的正、負二極上，該濾波電感及該濾波電容係串接，並透過該整流電路的二個二極體與該單相三線式變壓器二次側的正、負二極及中性線構成迴路。 The single-stage high-power double-parallel converter according to claim 3, the rectifier circuit includes two diodes, a filter inductor and a filter capacitor, and the two-pole system of the rectifier circuit is disposed on the single On the positive and negative poles of the secondary side of the three-phase transformer, the filter inductor and the filter capacitor are connected in series, and the two diodes of the rectifier circuit and the secondary side of the single-phase three-wire transformer are positive and negative. The two poles and the neutral line form a loop. 如請求項1或2所述的單級高功因之雙順向式轉換器，其中，各組主動式功因修正電路的電感、二極體及電容係三者串連後與該輸入電源構成迴路，對應的切換開關則跨接於對應電容，以於開閉該二組主動式功因修正電路的切換開關而決定對應電感與電容之儲能與釋能。 The single-stage high-power double-parallel converter according to claim 1 or 2, wherein the inductance, the diode and the capacitor of each group of active power factor correction circuits are connected in series with the input power source The circuit is configured to connect the corresponding switch to the corresponding capacitor to open and close the switch of the two sets of active power factor correction circuits to determine the energy storage and release energy of the corresponding inductor and capacitor. 如請求項3所述的單級高功因之雙順向式轉換器，其中，各組主動式功因修正電路的電感、二極體及電容係三者串連後與該輸入電源構成迴路，對應的切換開關則跨接於對應電容，以於開閉該二組主動式功因修正電路的切換開關而決定對應電感與電容之儲能與釋能。 The single-stage high-power double-parallel converter according to claim 3, wherein the inductance, the diode and the capacitor of each group of active power factor correction circuits are connected in series with the input power source The corresponding switch is connected to the corresponding capacitor to open and close the switch of the two sets of active power factor correction circuits to determine the energy storage and release energy of the corresponding inductor and capacitor.
TW104137798A 2015-11-17 2015-11-17 Single stage High Power Factor Dual-forward Converter TWI578683B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200713737A (en) * 2005-09-20 2007-04-01 Univ Nat Cheng Kung Converter with continuous-current-mode power-factor-correction
US8324871B2 (en) * 2009-11-19 2012-12-04 Delta Electronics, Inc. Integrated multi-inductor magnetic member and multi-loop power factor correction circuit having same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200713737A (en) * 2005-09-20 2007-04-01 Univ Nat Cheng Kung Converter with continuous-current-mode power-factor-correction
US8324871B2 (en) * 2009-11-19 2012-12-04 Delta Electronics, Inc. Integrated multi-inductor magnetic member and multi-loop power factor correction circuit having same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
B.R. Lin、David Wang,"Analysis and Implementation of an Active Clamp ZVS Forward Converter",IEEE International Conference on Industrial Technology,2005,pp. 1427-1432 *

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