TWI497890B - Series cascaded converter with single zero-voltage-transition auxiliary circuit - Google Patents
Series cascaded converter with single zero-voltage-transition auxiliary circuit Download PDFInfo
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本發明涉及具單一零電壓輔助電路之串接式轉換器，尤指一種利用單一零電壓輔助電路之降昇壓型串接式轉換器。The present invention relates to a series converter having a single zero voltage auxiliary circuit, and more particularly to a step-down series converter using a single zero voltage auxiliary circuit.
由於現今之電子產品要求輕薄短小等特色，故電源轉換器之切換頻率呈現高頻化趨勢。例如，一習知之高昇壓比串接式降昇壓型轉換器如第一圖所示，其具有一前級轉換器(pre-stage converter)與一後級轉換器(post-stage converter)；因其電路具有架構簡單、高昇壓比及可操作於降壓模式等優點，而被廣泛地應用在電子產品之充電裝置上。在第一圖中之該前級轉換器為一昇壓型轉換器(boost converter)，包括一第一電感L1 (具電流IL1 )、一第一主開關S1 、一第一二極體D1 與一第一電容C1 ；而在第一圖中之該後級轉換器為一降昇壓型轉換器(buck-boost converter)，包括一第二電感L2 (具電流IL2 )、一第二主開關S2 、一第二二極體D2 、一第二電容C2 以及一負載Ro ；且該降昇壓型轉換器接收一直流輸入電壓Vi ，且產生一直流輸出電壓Vo 。Since today's electronic products require features such as lightness, thinness, and shortness, the switching frequency of the power converter has a high frequency trend. For example, a conventional high step-up ratio series-down converter type converter has a pre-stage converter and a post-stage converter as shown in the first figure; Because of its simple structure, high boost ratio and operable in buck mode, the circuit is widely used in charging devices for electronic products. The front stage converter in the first figure is a boost converter, including a first inductor L 1 (with current I L1 ), a first main switch S 1 , and a first two pole The body D 1 and a first capacitor C 1 ; and the post-stage converter in the first figure is a buck-boost converter, including a second inductor L 2 (having a current I L2 ) a second main switch S 2 , a second diode D 2 , a second capacitor C 2 , and a load R o ; and the step-down converter receives the DC input voltage V i and generates Stream output voltage V o .
上述習知之高昇壓比串接式降昇壓型轉換器的主開關(例如第一圖所示之S1 與S2 )採用硬切換，此一方式會使得主開關S1 與S2 具有嚴重的切換損失。隨著切換頻率的提高，此切換損失更為明顯，轉換器一旦無法操作在高頻，就無法有效縮小產品體積及提高效率。The above-mentioned conventional high-boost ratio series-down type step-down converter main switch (for example, S 1 and S 2 shown in the first figure) adopts hard switching, which makes the main switches S 1 and S 2 have serious Switching loss. As the switching frequency increases, this switching loss is more obvious. Once the converter cannot operate at high frequencies, it cannot effectively reduce the product size and improve efficiency.
然而，電源轉換器切換頻率之高頻化將增加主開關(例如第一圖所示之S1 與S2 )的切換損失，導致電源轉換器之效率降低。若加入傳統之零電壓輔助電路，則需要兩組零電壓輔助電路，如第二圖所示。第二圖與第一圖之不同在於，第二圖中之一第一電感為Lf1 (具電流ILf1 )，一第二電感為Lf2 (具電流ILf2 )，在第一主開關S1 與第一電容C1 之間增加了一第一零電壓輔助電路，且增加了與第二主開關S2 並聯之一第二零電壓輔助電路。該第一零電壓輔助電路包括一第一共振電容Cr1 (具跨壓VCr1 )、一第一共振電感Lr1 、一第一輔助開關Sa 與一第三二極體Da ，且該第二零電壓輔助電路包括一第二共振電容Cr2 (具跨壓VCr2 )、一第二共振電感Lr2 、一第二輔助開關Sb 與一第四二極體Db 。However, the high frequency of the power converter switching frequency will increase the switching loss of the main switch (such as S 1 and S 2 shown in the first figure), resulting in a decrease in the efficiency of the power converter. If a conventional zero voltage auxiliary circuit is added, two sets of zero voltage auxiliary circuits are required, as shown in the second figure. The second figure is different from the first figure in that one of the first inductances in the second figure is L f1 (with current I Lf1 ), and the second inductance is L f2 (with current I Lf2 ) in the first main switch S and increasing the first capacitance C 1 between a zero voltage of a first auxiliary circuit, and increases the second zero-voltage auxiliary circuit connected in parallel with one of the second main switch 2 S. The first zero voltage auxiliary circuit includes a first resonant capacitor C r1 (with a voltage across the voltage V Cr1 ), a first resonant inductor L r1 , a first auxiliary switch S a and a third diode D a , and The 205th voltage auxiliary circuit includes a second resonant capacitor C r2 (with a voltage across the voltage V Cr2 ), a second resonant inductor L r2 , a second auxiliary switch S b and a fourth diode D b .
如第二圖所示習知之具兩組零電壓輔助電路的高昇壓比串接式降昇壓型轉換器仍具有效率較差與體積較大等缺點，可進一步加以改善。As shown in the second figure, the high-boost ratio series-connected step-down converter with two sets of zero-voltage auxiliary circuits still has the disadvantages of poor efficiency and large volume, and can be further improved.
職是之故，發明人鑒於習知技術之缺失，乃思及改良發明之意念，終能發明出本案之「具單一零電壓輔助電路之串接式轉換器」。As a result of the job, the inventor, in view of the lack of the prior art, thought of and improved the idea of invention, and finally invented the "serial converter with a single zero-voltage auxiliary circuit" in this case.
本案之主要目的在於提供一種具單一輔助電路之串接式轉換器，該單一輔助電路使主電路之雙主開關皆達到零電壓切換，除了可降低主要開關導通時之切換損失，並可減少一組零電壓輔助電路之元件，故本發明之創作目的與優勢為提昇效率、縮小產品體積及降低產品成本。The main purpose of the present invention is to provide a series converter with a single auxiliary circuit, which enables the dual main switches of the main circuit to achieve zero voltage switching, in addition to reducing the switching loss when the main switch is turned on, and reducing one The components of the zero voltage auxiliary circuit are set, so the purpose and advantage of the invention are to improve efficiency, reduce product volume and reduce product cost.
本案之又一主要目的在於提供一種串接式降昇壓型轉換器，包含一前級轉換器，一後級轉換器，以及一單一輔助電路，耦合於該前級與該後級轉換器，其中於該前級轉換器與該後級轉換器導通前，該輔助電路產生一放電作用，當該放電作用完成後，導通該前級與該後級轉換器，以達成零電壓切換。Another main object of the present invention is to provide a series-connected step-down converter including a pre-stage converter, a post-stage converter, and a single auxiliary circuit coupled to the pre-stage and the post-stage converter. The auxiliary circuit generates a discharge action before the pre-stage converter is turned on and the post-stage converter. When the discharge is completed, the pre-stage and the post-stage converter are turned on to achieve zero voltage switching.
本案之下一主要目的在於提供一種串接式降昇壓型轉換器，包含一前級轉換器，一後級轉換器，以及一單一輔助電路，耦合於該前級轉換器與該後級轉換器，且於受有一第一驅動訊號後一特定時間，發送一第二驅動信號於該前級轉換器與該後級轉換器，以達成零電壓切換。A primary object of the present invention is to provide a series-connected step-down converter including a pre-stage converter, a post-stage converter, and a single auxiliary circuit coupled to the pre-stage converter and the subsequent stage conversion And transmitting a second driving signal to the pre-stage converter and the post-stage converter at a specific time after receiving the first driving signal to achieve zero voltage switching.
本案之再一主要目的在於提供一種串接式轉換器，包含一前級轉換器，一後級轉換器，以及一單一輔助電路，具第一端及第二端，其中該第一端連接於該前級轉換器，且該第二端連接於該後級轉換器。A further main object of the present invention is to provide a serial-to-connect converter comprising a pre-stage converter, a post-stage converter, and a single auxiliary circuit having a first end and a second end, wherein the first end is connected to The front stage converter is connected to the second stage converter.
為了讓本發明之上述目的、特徵、和優點能更明顯易懂，下文特舉較佳實施例，並配合所附圖式，作詳細說明如下：The above described objects, features, and advantages of the present invention will become more apparent and understood.
如第三圖所示，為一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路之高昇壓比串接式降昇壓型轉換器的電路圖。第三圖與前述第二圖之不同在於將第二圖中之該兩組零電壓輔助電路精簡為一組零電壓輔助電路，其電路之連接方式亦復不同。其中，該單一零電壓輔助電路除僅具一(第一)輔助開關Sa 與一諧振(耦合)電感Lr 外，仍包括該第一與該第二諧振電容Cr1 和Cr2 及該第三二極體Da 等元件。在轉換器之該第一與該第二主開關S1 和S2 導通之前，在該輔助開關Sa 導通後，該諧振電感Lr 與諧振電容Cr1 和Cr2 會產生諧振電流ILr 。當該兩諧振電容Cr1 和Cr2 放電完畢後，因諧振電感Lr 不容許諧振電流ILr 瞬間變化，所以諧振電流ILr 會流經並聯於主開關S1 與S2 兩端之二極體。此時，如將主開關S1 和S2 同時導通，即可使主開關S1 與S2 達到零電壓切換。如主開關S1 和S2 使用金氧半場效電晶體(MOSFETs)元件，亦可利用元件本身之寄生二極體取代額外並聯於主開關S1 與S2 兩端之二極體。綜合前述觀點，本發明具有以下優點：As shown in the third figure, there is shown a circuit diagram of a high step-up ratio series-down converter type converter having a single zero voltage auxiliary circuit in accordance with a first preferred embodiment of the present invention. The third figure is different from the foregoing second figure in that the two sets of zero voltage auxiliary circuits in the second figure are reduced to a set of zero voltage auxiliary circuits, and the connection modes of the circuits are also different. Wherein, the single zero voltage auxiliary circuit includes the first and second resonant capacitors C r1 and C r2 and the first (the first) auxiliary switch S a and the resonant (coupling) inductor L r The third diode D a and other components. Before the first and the second main switch S 1 is and S 2 are turned converter of, after the auxiliary switch S a is turned on, the resonant inductor L r and the resonant capacitor C r1 and C r2 generates resonant current I Lr. When the two resonant capacitors C r1 and C r2 are discharged, since the resonant inductor L r does not allow the resonant current I Lr to instantaneously change, the resonant current I Lr flows through the two poles connected in parallel across the main switches S 1 and S 2 . body. At this time, if the main switches S 1 and S 2 are simultaneously turned on, the main switches S 1 and S 2 can be switched to zero voltage. If the main switches S 1 and S 2 use metal oxide half field effect transistor (MOSFETs) components, the parasitic diodes of the components themselves can be used to replace the diodes additionally connected in parallel across the main switches S 1 and S 2 . Combining the foregoing points, the present invention has the following advantages:
(1)本發明利用單一零電壓輔助電路使主電路之主開關S1 和S2 皆可達到零電壓切換。(1) The present invention utilizes a single zero voltage auxiliary circuit to enable zero voltage switching of the main switches S 1 and S 2 of the main circuit.
(2)使用單一零電壓輔助電路使主電路之主開關S1 與S2 同時達到零電壓切換，可節省一組零電壓輔助電路元件。(2) Using a single zero voltage auxiliary circuit to make the main switch S 1 and S 2 of the main circuit reach zero voltage switching at the same time, a set of zero voltage auxiliary circuit components can be saved.
(3)電路之主開關S1 和S2 具有零電壓切換，使得有效降低開關導通時之切換損失，因此可將電路操作在高頻，(3) The main switches S 1 and S 2 of the circuit have zero voltage switching, so that the switching loss when the switch is turned on is effectively reduced, so that the circuit can be operated at a high frequency.
當然，上述之利用單一零電壓輔助電路俾達成主開關S1 與S2 零電壓切換、減少一組輔助電路、縮小體積及具有高效率等優點之本發明構想亦可擴大應用於串接式轉換器。如第四圖所示為一依據本發明構想之第二較佳實施例的具單一零電壓輔助電路之串接式轉換器的電路示意圖。在第四圖中，該串接式轉換器包含一前級轉換器，一後級轉換器，以及一單一輔助電路，具第一端及第二端，其中該第一端連接於該前級轉換器，且該第二端連接於該後級轉換器。參見第四圖，該前級轉換器為一昇壓型轉換器或一降壓型轉換器，且該後級轉換器是選自一昇壓型轉換器、一降壓型轉換器與一降昇壓型轉換器三者其中之任一。例如，當該前級轉換器為一降壓型轉換器，而該後級轉換器為一降昇壓型轉換器或者一降壓型轉換器時，則該具單一零電壓輔助電路之串接式轉換器為一高降壓比串接式轉換器。Of course, the above concept of using the single zero voltage auxiliary circuit to achieve zero voltage switching of the main switches S 1 and S 2 , reducing a set of auxiliary circuits, reducing the volume, and having high efficiency can also be expanded to be applied in series. converter. As shown in the fourth figure, a circuit diagram of a series converter having a single zero voltage auxiliary circuit in accordance with a second preferred embodiment of the present invention is shown. In the fourth figure, the series converter includes a pre-stage converter, a post-stage converter, and a single auxiliary circuit having a first end and a second end, wherein the first end is connected to the pre-stage a converter, and the second end is coupled to the post-stage converter. Referring to the fourth figure, the pre-stage converter is a step-up converter or a buck converter, and the post-stage converter is selected from a boost converter, a buck converter and a drop. Any of the boost converters. For example, when the pre-stage converter is a buck converter and the post-stage converter is a step-down converter or a buck converter, the string has a single zero-voltage auxiliary circuit. The connected converter is a high step-down ratio serial converter.
第五圖(a)-(h)分別顯示一習知之昇壓型、降壓型、降昇壓型、Cuk、Sepic、Zeta、返馳式與順向式轉換器的電路圖。在第五圖(a)-(h)所示之轉換器中，昇壓型轉換器具昇壓功能，降壓型轉換器具降壓功能，至於其餘六種轉換器則均兼具昇壓以及降壓之功能。The fifth diagrams (a)-(h) show circuit diagrams of a conventional boost, buck, step-down, Cuk, Sepic, Zeta, flyback, and forward converter, respectively. In the converters shown in the fifth (a)-(h), the boost converter has a boost function, the buck converter has a buck function, and the other six converters have both boost and drop. The function of pressing.
第六圖顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路之高昇壓比串接式降昇壓型轉換器的第一與第二主開關S1 與S2 之驅動訊號VS1 與VS2 的波形圖，其中該兩個主開關S1 與S2 的驅動訊號VS1 與VS2 為同步(如第六圖所示)。Figure 6 shows first and second main switches S 1 and S 2 of a high step-up ratio series step-down converter having a single zero voltage auxiliary circuit in accordance with a first preferred embodiment of the present invention. the drive signal waveform diagram V S1 and V S2, wherein the two main switches S 1 and S-drive signal V S1 and V S2 2 for synchronization (e.g., shown in FIG VI).
第七圖顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路之高昇壓比串接式降昇壓型轉換器的主要模擬波形圖，其中包含主開關S1 與S2 及輔助開關Sa 的驅動訊號VS1 、VS2 和VSa 、主開關S1 和S2 的跨壓Vds1 與Vds2 、主開關S1 與S2 與其並聯二極體電流Ids1 與Ids2 及諧振電流ILr 、二極體跨壓VD1 與VD2 以及二極體電流ID1 與ID2 。觀察波形可知，開關驅動訊號VS1 與VS2 在導通瞬間，主開關S1 和S2 及其並聯二極體電流Ids1 與Ids2 皆為負值，故可證明主開關S1 與S2 具有零電壓導通之特性，進而可提高電路切換頻率，縮小儲能元件體積。7 is a main analog waveform diagram of a high step-up ratio series-connected step-down converter with a single zero voltage auxiliary circuit according to a first preferred embodiment of the present invention, including a main switch S 1 and S 2 and auxiliary switch S a drive signals V S1 , V S2 and V Sa , main switches S 1 and S 2 across voltages V ds1 and V ds2 , main switches S 1 and S 2 and their parallel diode current I ds1 And I ds2 and resonant current I Lr , diode crossover voltages V D1 and V D2 , and diode currents I D1 and I D2 . Observing the waveform, it can be seen that the switch drive signals V S1 and V S2 are turned on, the main switches S 1 and S 2 and their parallel diode currents I ds1 and I ds2 are both negative values, so the main switches S 1 and S 2 can be proved. It has the characteristics of zero voltage conduction, which can increase the switching frequency of the circuit and reduce the volume of the energy storage component.
第八圖(a)顯示一習知之不具零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關的電壓電流應力模擬曲線圖。第八圖(b)顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關的電壓電流應力模擬曲線圖。由第八圖(a)與第八圖(b)之比較可知依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關S1的電壓電流應力模擬曲線優於習知之不具零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關S1。Figure 8(a) shows a voltage-current stress simulation curve of a first main switch of a high step-up series cascade-down converter without a zero voltage auxiliary circuit. Figure 8(b) shows a voltage-current stress simulation of a first main switch of a high step-up series cascade-down converter with a single zero-voltage auxiliary circuit in accordance with a first preferred embodiment of the present invention. Graph. From the comparison of the eighth diagram (a) and the eighth diagram (b), the high step-up ratio series step-down converter with a single zero voltage auxiliary circuit according to the first preferred embodiment of the present invention is known. The voltage current stress simulation curve of the first main switch S1 is superior to the first main switch S1 of the high step-up series step-down converter type converter without the zero voltage auxiliary circuit.
第九圖(a)顯示一習知之不具零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關的電壓電流應力模擬曲線圖。第九圖(b)顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關S2的電壓電流應力模擬曲線圖。由第九圖(a)與第九圖(b)之比較可知依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關的電壓電流應力模擬曲線優於習知之不具零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關S2。The ninth diagram (a) shows a voltage-current stress simulation curve of a second main switch of a high step-up series cascade-down converter without a zero voltage auxiliary circuit. Figure 9 (b) shows the voltage and current stress of the second main switch S2 of the high step-up series series step-down converter with a single zero voltage auxiliary circuit according to the first preferred embodiment of the present invention. Simulate the graph. From the comparison of the ninth diagram (a) and the ninth diagram (b), the high step-up ratio series step-down converter with a single zero voltage auxiliary circuit according to the first preferred embodiment of the present invention is known. The voltage-current stress simulation curve of the second main switch is superior to the second main switch S2 of the high-boost ratio series step-down converter without the zero voltage auxiliary circuit.
第十圖(a)顯示一習知之具兩組零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關的電壓電流應力模擬曲線圖。第十圖(b)顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關的電壓電流應力模擬曲線圖。由第十圖(a)與第十圖(b)之比較可知，依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關S1 的電壓電流應力模擬曲線優於習知之具兩組零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關S1 。Fig. 10(a) shows a voltage-current stress simulation curve of a first main switch of a conventional high-boost ratio series-down converter type converter with two sets of zero-voltage auxiliary circuits. FIG. 10(b) shows a voltage-current stress simulation of a first main switch of a high step-up series cascade-down converter with a single zero-voltage auxiliary circuit in accordance with a first preferred embodiment of the present invention. Graph. From the comparison of the tenth (a) and the tenth (b), the high boost ratio series step-down converter with a single zero voltage auxiliary circuit according to the first preferred embodiment of the present invention is known. the first main switch voltage and current stress simulated curves S 1 is superior to the conventional zero-voltage auxiliary circuit having two high boosting ratio reduction cascoded first main switch of the boost converter S 1.
第十一圖(a)顯示一習知之具兩組零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關的電壓電流應力模擬曲線圖。第十一圖(b)顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關的電壓電流應力模擬曲線圖。由第十一圖(a)與第十一圖(b)之比較可知依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關S2 的電壓電流應力模擬 曲線優於習知之具兩組零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關S2 。Figure 11 (a) shows a voltage-current stress simulation curve of a second main switch of a conventional high-boost ratio series-down converter type converter with two sets of zero-voltage auxiliary circuits. Figure 11 (b) shows the voltage and current stress of the second main switch of the high step-up series series step-down converter with a single zero voltage auxiliary circuit according to the first preferred embodiment of the present invention Simulate the graph. From the comparison of FIG. 11(a) and the eleventh figure (b), a high step-up ratio series step-down type conversion with a single zero voltage auxiliary circuit according to the first preferred embodiment of the present invention is known. second main switch S is simulated curves of voltage and current stress better than conventional 2 with two zero-voltage of the auxiliary booster circuit 2 is higher than the second main switch S cascadable the buck-boost converter.
第十二圖顯示一習知之具兩組零電壓輔助電路的高昇壓比串接式降昇壓型轉換器與依據本發明構想的第一較佳實施例之具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之效率模擬曲線圖，其中依據本發明構想的第一較佳實施例之具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之效率均優於習知之具兩組零電壓輔助電路的高昇壓比串接式降昇壓型轉換器。Figure 12 shows a conventional high-boosting series-connected step-down converter with two sets of zero-voltage auxiliary circuits and a high-rise with a single zero-voltage auxiliary circuit according to the first preferred embodiment of the present invention. A high efficiency step-down series step-down converter with a single zero voltage auxiliary circuit according to a first preferred embodiment of the present invention, which is an efficiency simulation graph of a voltage ratio series step-down converter The efficiency is better than the conventional high-boost ratio series-connected step-down converter with two sets of zero-voltage auxiliary circuits.
由上述第八圖(a)與(b)、第九圖(a)與(b)、第十圖(a)與(b)、第十一圖(a)與(b)及第十二圖之模擬結果可知，依據本發明構想之第一較佳實施例的具單一零電壓輔助電路之高昇壓比串接式降昇壓型轉換器可有效降低雙主開關S1 與S2 之導通切換損失。From the above eighth figures (a) and (b), ninth (a) and (b), tenth (a) and (b), eleventh (a) and (b) and twelfth As can be seen from the simulation results of the figure, the high step-up ratio series-connected step-down converter with a single zero-voltage auxiliary circuit according to the first preferred embodiment of the present invention can effectively reduce the dual main switches S 1 and S 2 . Turn on the switching loss.
1.一種串接式降昇壓型轉換器，包含：一前級轉換器，具一第一主開關；一後級轉換器，具一第二主開關；以及一單一輔助電路，連接於該前級與該後級轉換器，其中於該第一與該第二主開關導通前，該輔助電路產生一放電作用，當該放電作用完成後，導通該第一與該第二主開關，以達成零電壓切換。A series-connected step-down converter comprising: a pre-stage converter having a first main switch; a post-stage converter having a second main switch; and a single auxiliary circuit coupled to the a pre-stage and a post-stage converter, wherein the auxiliary circuit generates a discharge action before the first and the second main switch are turned on, and when the discharging action is completed, turning on the first and the second main switch to A zero voltage switch is achieved.
2.根據實施例1所述之串接式降昇壓型轉換器，其中該前級轉換器為一昇壓型轉換器，且該後級轉換器為一降昇壓 型轉換器。2. The series-connected step-down converter of embodiment 1, wherein the pre-stage converter is a boost converter, and the post-stage converter is a step-down converter Type converter.
3.根據實施例1或2所述之串接式降昇壓型轉換器，其中該第一與該第二主開關各具一第一端與一第二端，該單一輔助電路包括一具一第一端與一第二端之輔助開關、一具一陽極與一陰極之第一二極體、一第一諧振電容、一第二諧振電容與一具一第一端與一第二端之諧振電感，該第一諧振電容並聯該第一主開關，該第二諧振電容並聯該第二主開關，該諧振電感之該第一端連接於該第一主開關之該第一端，該諧振電感之該第二端連接於該輔助開關之該第一端與該第一二極體之該陽極，該第一二極體之該陰極連接於該第二主開關之該第一端，該輔助開關之該第二端連接於該第二主開關之該第二端，且該第一主開關之該第二端連接於一共同接地端。3. The series-connected step-down converter of embodiment 1 or 2, wherein the first and second main switches each have a first end and a second end, the single auxiliary circuit comprising a An auxiliary switch of a first end and a second end, a first diode having an anode and a cathode, a first resonant capacitor, a second resonant capacitor, and a first end and a second end a resonant inductor, the first resonant capacitor is connected in parallel with the first main switch, the second resonant capacitor is connected in parallel with the second main switch, and the first end of the resonant inductor is connected to the first end of the first main switch, The second end of the resonant inductor is connected to the first end of the auxiliary switch and the anode of the first diode, and the cathode of the first diode is connected to the first end of the second main switch, The second end of the auxiliary switch is connected to the second end of the second main switch, and the second end of the first main switch is connected to a common ground end.
4.根據以上任一實施例所述之串接式降昇壓型轉換器，其中該昇壓型轉換器更包括一第二二極體，該降昇壓型轉換器更包括一第三二極體，該第一主開關並聯於該第二二極體，該第二主開關並聯於該第三二極體，當該第一與該第二主開關導通前，在該輔助開關導通後，該諧振電感與該第一與第二諧振電容產生一諧振電流，該第一與該第二諧振電容於此時放電，當該第一與該第二諧振電容放電完畢後，該諧振電流續流並流經該第二與該第三二極體，且該第一與該第二主開關於此時被導通，以達成零電壓切換。4. The series-connected step-down converter of any one of the preceding embodiments, wherein the step-up converter further comprises a second diode, the step-up converter further comprising a third a pole body, the first main switch is connected in parallel to the second diode, and the second main switch is connected in parallel to the third diode. Before the first and the second main switch are turned on, after the auxiliary switch is turned on The resonant inductor generates a resonant current with the first and second resonant capacitors, and the first and second resonant capacitors are discharged at this time. After the first and second resonant capacitors are discharged, the resonant current continues. And flowing through the second and the third diodes, and the first and second main switches are turned on at this time to achieve zero voltage switching.
5.根據以上任一實施例所述之串接式降昇壓型轉換器，其中該輔助電路為一零電壓輔助電路，該第一與該第二主開 關均為一具一寄生二極體之金氧半場效電晶體，且該第二與該第三二極體均為該金氧半場效電晶體之寄生二極體。5. The series-connected step-down converter of any of the above embodiments, wherein the auxiliary circuit is a zero voltage auxiliary circuit, the first and the second main opening The gates are each a gold-oxygen half-field effect transistor with a parasitic diode, and the second and the third diodes are parasitic diodes of the MOS field-effect transistor.
6.一種串接式降昇壓型轉換器，包含：一前級轉換器；一後級轉換器；以及一單一輔助電路，連接於該前級轉換器與該後級轉換器，且於受有一第一驅動訊號後一特定時間，發送一第二驅動信號於該前級轉換器與該後級轉換器，以達成零電壓切換。6. A series-connected step-down converter comprising: a pre-stage converter; a post-stage converter; and a single auxiliary circuit coupled to the pre-stage converter and the post-stage converter After a certain driving time, a second driving signal is sent to the pre-stage converter and the post-stage converter to achieve zero voltage switching.
7.根據實施例6所述之串接式降昇壓型轉換器，其中該前級轉換器具一第一主開關，該後級轉換器具一第二主開關，該第一驅動訊號用於在該第一與該第二主開關導通前，使該輔助電路產生一放電作用，該第二驅動訊號用於在該放電作用完成後，導通該第一與該第二主開關，以達成零電壓切換。7. The series-connected step-down converter of embodiment 6, wherein the pre-stage converter has a first main switch, the post-stage converter has a second main switch, and the first drive signal is used in Before the first and the second main switch are turned on, the auxiliary circuit generates a discharge function, and the second driving signal is used to turn on the first and the second main switch to achieve zero voltage after the discharging is completed. Switch.
8.根據實施例7所述之串接式降昇壓型轉換器，其中該前級轉換器為一昇壓型轉換器，該後級轉換器為一降昇壓型轉換器，該第一與該第二主開關各具一第一端與一第二端，該單一輔助電路包括一具一第一端與一第二端之輔助開關、一具一陽極與一陰極之第一二極體、一第一諧振電容、一第二諧振電容與一具一第一端與一第二端之諧振電感，該第一諧振電容並聯該第一主開關，該第二諧振電容並聯該第二主開關，該諧振電感之該第一端連接於該第一主開關之該第一端，該諧振電感之該第二端連接於該輔助 開關之該第一端與該第一二極體之該陽極，該第一二極體之該陰極連接於該第二主開關之該第一端，該輔助開關之該第二端連接於該第二主開關之該第二端，且該第一主開關之該第二端連接於一共同接地端。8. The series-connected step-down converter of embodiment 7, wherein the pre-stage converter is a boost converter, and the post-stage converter is a step-down converter, the first The second main switch has a first end and a second end. The single auxiliary circuit includes an auxiliary switch having a first end and a second end, and a first diode having a cathode and a cathode. a first resonant capacitor, a second resonant capacitor, and a resonant inductor having a first end and a second end, the first resonant capacitor being connected in parallel with the first main switch, the second resonant capacitor being connected in parallel with the second a first switch, the first end of the resonant inductor is connected to the first end of the first main switch, and the second end of the resonant inductor is connected to the auxiliary The first end of the switch is connected to the anode of the first diode, the cathode of the first diode is connected to the first end of the second main switch, and the second end of the auxiliary switch is connected to the anode The second end of the second main switch, and the second end of the first main switch is connected to a common ground end.
9.一種串接式轉換器，包含：一前級轉換器；一後級轉換器；以及一單一輔助電路，具一第一端及一第二端，其中該第一端連接於該前級轉換器，且該第二端連接於該後級轉換器。A serial-to-connect converter comprising: a pre-stage converter; a post-stage converter; and a single auxiliary circuit having a first end and a second end, wherein the first end is coupled to the pre-stage a converter, and the second end is coupled to the post-stage converter.
10.根據實施例9所述之串接式轉換器，該串接式轉換器為一串接式降昇壓型轉換器，其中該前級轉換器為一昇壓型轉換器，該後級轉換器為一降昇壓型轉換器，該昇壓型轉換器包括一具一第一端與一第二端之第一主開關，該降昇壓型轉換器包括一具一第一端與一第二端之第二主開關，該單一輔助電路包括一具一第一端與一第二端之輔助開關、一具一陽極與一陰極之第一二極體、一第一諧振電容、一第二諧振電容與一具一第一端與一第二端之諧振電感，該第一諧振電容並聯該第一主開關，該第二諧振電容並聯該第二主開關，該諧振電感之該第一端連接於該輔助電路之該第一端與該第一主開關之該第一端，該諧振電感之該第二端連接於該輔助開關之該第一端與該第一二極體之該陽極，該第一二極體之該陰極連接於該第二主開關之該第一端，該輔助開關之該第二端連接於該輔助電路之該第二端與該第二主開關之該第二端，且該第一主開關之該第二 端連接於一共同接地端。10. The serial-to-connect converter of embodiment 9, the series-connected converter is a series-connected step-down converter, wherein the pre-stage converter is a boost converter, the latter stage The converter is a step-down converter, the boost converter includes a first main switch having a first end and a second end, and the step-up converter includes a first end and a a second main switch of the second end, the single auxiliary circuit includes an auxiliary switch having a first end and a second end, a first diode having an anode and a cathode, a first resonant capacitor, a second resonant capacitor and a resonant inductor having a first end and a second end, the first resonant capacitor being connected in parallel with the first main switch, the second resonant capacitor being connected in parallel with the second main switch, the resonant inductor The first end is connected to the first end of the auxiliary circuit and the first end of the first main switch, and the second end of the resonant inductor is connected to the first end of the auxiliary switch and the first diode The anode of the first diode is connected to the first end of the second main switch, and the auxiliary switch The second end is connected to the second end of the auxiliary circuit and the second end of the second main switch, and the second end of the first main switch The ends are connected to a common ground.
11.根據實施例9或10所述之串接式轉換器，其中該前級轉換器是選自一昇壓型轉換器、一降壓型轉換器、一Sepic轉換器、一Zeta轉換器、一返馳式轉換器與一順向式轉換器其中之任一，且該後級轉換器是選自一昇壓型轉換器、一降壓型轉換器、一降昇壓型轉換器、一Cuk轉換器、一Sepic轉換器、一Zeta轉換器、一返馳式轉換器與一順向式轉換器其中之任一。11. The serial-to-connect converter of embodiment 9 or 10, wherein the pre-stage converter is selected from the group consisting of a boost converter, a buck converter, a Sepic converter, a Zeta converter, a flyback converter and a forward converter, and the post converter is selected from a boost converter, a buck converter, a boost converter, and a A Cuk converter, a Sepic converter, a Zeta converter, a flyback converter and a forward converter.
綜上所述，本發明提供一種具單一輔助電路之串接式轉換器，該單一輔助電路使主電路之雙主開關皆達到零電壓切換，除了可降低主開關之導通切換損失，並可減少一組零電壓輔助電路之元件，故本發明之創作目的與優勢為提昇效率、縮小產品體積及降低產品成本，故其確實具有進步性與新穎性。In summary, the present invention provides a series-connected converter with a single auxiliary circuit, which enables the dual main switches of the main circuit to achieve zero voltage switching, in addition to reducing the conduction switching loss of the main switch, and reducing A set of zero voltage auxiliary circuit components, so the creative purpose and advantage of the present invention is to improve efficiency, reduce product volume and reduce product cost, so it is indeed progressive and novel.
是以，縱使本案已由上述之實施例所詳細敘述而可由熟悉本技藝之人士任施匠思而為諸般修飾，然皆不脫如附申請專利範圍所欲保護者。Therefore, even though the present invention has been described in detail by the above-described embodiments, it can be modified by those skilled in the art, and is not intended to be protected as claimed.
第一圖：其係顯示一習知之高昇壓比串接式降昇壓型轉換器的電路圖；第二圖：其係顯示一習知之具兩組零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之電路圖；第三圖：其係顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路之高昇壓比串接式降昇壓型轉換器的電路 圖；第四圖：其係顯示一依據本發明構想之第二較佳實施例的具單一零電壓輔助電路之串接式轉換器的電路示意圖；第五圖(a)-(h)：其係分別顯示一習知之昇壓型、降壓型、降昇壓型、Cuk、Sepic、Zeta、返馳式與順向式轉換器的電路圖；第六圖：其係顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路之高昇壓比串接式降昇壓型轉換器的第一與第二主開關之驅動訊號的波形圖；第七圖：其係顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路之高昇壓比串接式降昇壓型轉換器的主要模擬波形圖；第八圖(a)：其係顯示一習知之不具零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關的電壓電流應力模擬曲線圖；第八圖(b)：其係顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關的電壓電流應力模擬曲線圖；第九圖(a)：其係顯示一習知之不具零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關的電壓電流應力模擬曲線圖；第九圖(b)：其係顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第 二主開關的電壓電流應力模擬曲線圖；第十圖(a)：其係顯示一習知之具兩組零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關的電壓電流應力模擬曲線圖；第十圖(b)：其係顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第一主開關的電壓電流應力模擬曲線圖；第十一圖(a)：其係顯示一習知之具兩組零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關的電壓電流應力模擬曲線圖；第十一圖(b)：其係顯示一依據本發明構想之第一較佳實施例的具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之第二主開關的電壓電流應力模擬曲線圖；以及第十二圖：其係顯示一習知之具兩組零電壓輔助電路與依據本發明構想的第一較佳實施例之具單一零電壓輔助電路的高昇壓比串接式降昇壓型轉換器之效率模擬曲線圖。The first picture shows a circuit diagram of a conventional high step-up ratio series-down type step-down converter; the second picture shows a high-boost ratio series connection with a conventional two-voltage auxiliary circuit. Circuit diagram of a boost converter; FIG. 3 is a circuit diagram showing a high step-up ratio series step-down converter with a single zero voltage auxiliary circuit according to a first preferred embodiment of the present invention Figure 4 is a circuit diagram showing a series converter with a single zero voltage auxiliary circuit in accordance with a second preferred embodiment of the present invention; fifth (a)-(h): The circuit diagrams of a conventional boost type, buck type, step-down type, Cuk, Sepic, Zeta, flyback and forward converter are respectively shown; sixth figure: the system shows a concept according to the present invention. A waveform diagram of driving signals of first and second main switches of a high step-up ratio series step-down converter having a single zero voltage auxiliary circuit according to the first preferred embodiment; seventh figure: A main analog waveform diagram of a high step-up ratio series step-down converter with a single zero voltage auxiliary circuit according to a first preferred embodiment of the present invention; FIG. 8(a): A voltage and current stress simulation curve of a first main switch of a high step-up ratio series step-down converter without a zero voltage auxiliary circuit; FIG. 8(b): showing a first embodiment according to the present invention High boost ratio series-connected step-down boost with a single zero voltage auxiliary circuit of a preferred embodiment Simulation of voltage and current stress of the first main switch of the type converter; ninth figure (a): showing a second high-boost ratio series step-down converter with a zero voltage auxiliary circuit A voltage-current stress simulation diagram of the main switch; ninth diagram (b): showing a high step-up ratio series-down boost with a single zero-voltage auxiliary circuit in accordance with a first preferred embodiment of the present invention Type converter The voltage and current stress simulation curve of the two main switches; the tenth figure (a): which shows a first main switch of a high step-up series cascade-down converter with a set of zero voltage auxiliary circuits Voltage and current stress simulation graph; FIG. 10(b) is a high step-up ratio series step-down converter with a single zero voltage auxiliary circuit according to a first preferred embodiment of the present invention. The voltage-current stress simulation curve of the first main switch; FIG. 11(a): shows a second high-boost ratio series-down converter type converter with a set of zero-voltage auxiliary circuits Simulation diagram of voltage and current stress of the main switch; FIG. 11(b): showing a high step-up ratio series rise with a single zero voltage auxiliary circuit according to the first preferred embodiment of the present invention A voltage-current stress simulation plot of a second main switch of the proformer; and a twelfth diagram showing a conventional two-part zero voltage auxiliary circuit and a first preferred embodiment in accordance with the teachings of the present invention High boost ratio series connection of single zero voltage auxiliary circuit The efficiency of the boost converter simulated curves in FIG.
Claims (11)
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| TW099147386A TWI497890B (en) | 2010-12-31 | 2010-12-31 | Series cascaded converter with single zero-voltage-transition auxiliary circuit |
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| TW099147386A TWI497890B (en) | 2010-12-31 | 2010-12-31 | Series cascaded converter with single zero-voltage-transition auxiliary circuit |
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| TWI473410B (en) * | 2013-01-11 | 2015-02-11 | Univ Nat Formosa | Non-isolated dc-dc converter |
| TWI504116B (en) * | 2013-11-01 | 2015-10-11 | Hep Tech Co Ltd | Power conversion device and conversion method thereof |
| CN106033929B (en) * | 2015-03-16 | 2018-11-02 | 台达电子工业股份有限公司 | A kind of power converter and its control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW281826B (en) * | 1992-10-14 | 1996-07-21 | Electronic Power Conditioning Inc | |
| US6798177B1 (en) * | 2002-10-15 | 2004-09-28 | Arques Technology, Inc. | Boost-buck cascade converter for pulsating loads |
| TW200929825A (en) * | 2007-12-19 | 2009-07-01 | Univ Nat Taipei Technology | A two-stage converter and its start-up controlling method |
| TW201005458A (en) * | 2008-07-16 | 2010-02-01 | Acbel Polytech Inc | AC to DC power converter with hold up time function |
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2010
- 2010-12-31 TW TW099147386A patent/TWI497890B/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW281826B (en) * | 1992-10-14 | 1996-07-21 | Electronic Power Conditioning Inc | |
| US6798177B1 (en) * | 2002-10-15 | 2004-09-28 | Arques Technology, Inc. | Boost-buck cascade converter for pulsating loads |
| TW200929825A (en) * | 2007-12-19 | 2009-07-01 | Univ Nat Taipei Technology | A two-stage converter and its start-up controlling method |
| TW201005458A (en) * | 2008-07-16 | 2010-02-01 | Acbel Polytech Inc | AC to DC power converter with hold up time function |
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