TW202135446A - High voltage gain converter comprising three switches, two inductors, four diodes, and three capacitors - Google Patents
High voltage gain converter comprising three switches, two inductors, four diodes, and three capacitors Download PDFInfo
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本發明是有關於一種升壓型轉換器,特別是指一種用於再生能源電力系統中連結再生能源與高壓匯流排之間的高電壓增益轉換器。The present invention relates to a boost converter, in particular to a high voltage gain converter for connecting renewable energy and high-voltage busbars in a renewable energy power system.
參閱圖1,一種習知的升壓轉換器,習知的升壓轉換器操作在極高導通比才能達到較高電壓增益,參數VO 、Vin 、D分別為輸出電壓、輸入電壓、開關的責任導通比,但是實務上受到寄生元件的影響,當導通比超過0.9以上時而使電壓增益不增反減,不符高電壓增益的需求,因此,無需極高導通比且同時為符合高電壓增益的需求的高電壓增益轉換器是未來的研究方向。Refer to Figure 1, a conventional boost converter. The conventional boost converter operates at a very high conduction ratio to achieve a higher voltage gain. , The parameters V O , V in , D are the output voltage, input voltage, and the responsible conduction ratio of the switch, but they are affected by parasitic elements in practice. When the conduction ratio exceeds 0.9, the voltage gain will not increase but decrease, which is not high. The demand for voltage gain, therefore, a high voltage gain converter that does not require a very high conduction ratio and at the same time meets the demand for high voltage gain is a future research direction.
因此,本發明之目的,即在提供一種高電壓增益轉換器。Therefore, the object of the present invention is to provide a high voltage gain converter.
於是,本發明高電壓增益轉換器,包含一第一電感、一第一開關、一第二開關、一第二電感、第一二極體、一第二二極體、一第一電容、一第三二極體、一第三開關、一第二電容,與一輸出級。Therefore, the high voltage gain converter of the present invention includes a first inductor, a first switch, a second switch, a second inductor, a first diode, a second diode, a first capacitor, and a second inductor. The third diode, a third switch, a second capacitor, and an output stage.
第一電感具有一接收一直流電壓的第一端與一第二端。第一開關具有一電連接該第一電感的第二端的第一端與一接地的第二端,且受控制切換於導通與不導通間。第二開關具有一電連接該第一電感的第一端的第一端與一第二端,且受控制切換於導通與不導通間。第二電感具有一電連接該第二開關的第二端的第一端與一電連接該第一開關的第二端的第二端。第一二極體具有一電連接該該第一電感的第一端的陽極,與一陰極。第二二極體具有一電連接該第一開關的第二端的陰極,與一陽極。第一電容具有一電連接該第一二極體的陰極的第一端與一電連接該第一電感的第二端的第二端。第三二極體具有一電連接該第一電感的第二端的陽極,與一陰極。第三開關具有一電連接該第三二極體的陰極的第一端,與一電連接該第二開關的第二端的第二端,且受控制切換於導通與不導通間。第二電容電連接該第二開關的第二端與該第二二極體的陽極之間。輸出級電連接該第一電容的第一端與該第二電容的第二端,用以提供一正比於該第一電容的跨壓與該第二電容的跨壓的加總的輸出電壓。The first inductor has a first terminal and a second terminal for receiving a DC voltage. The first switch has a first terminal electrically connected to the second terminal of the first inductor and a grounded second terminal, and is controlled to switch between conduction and non-conduction. The second switch has a first terminal and a second terminal electrically connected to the first terminal of the first inductor, and is controlled to switch between conduction and non-conduction. The second inductor has a first end electrically connected to the second end of the second switch and a second end electrically connected to the second end of the first switch. The first diode has an anode electrically connected to the first end of the first inductor and a cathode. The second diode has a cathode electrically connected to the second end of the first switch, and an anode. The first capacitor has a first end electrically connected to the cathode of the first diode and a second end electrically connected to the second end of the first inductor. The third diode has an anode electrically connected to the second end of the first inductor, and a cathode. The third switch has a first end electrically connected to the cathode of the third diode, and a second end electrically connected to the second end of the second switch, and is controlled to switch between conduction and non-conduction. The second capacitor is electrically connected between the second terminal of the second switch and the anode of the second diode. The output stage is electrically connected to the first end of the first capacitor and the second end of the second capacitor to provide an output voltage proportional to the sum of the cross voltage of the first capacitor and the cross voltage of the second capacitor.
本發明之功效在於:由於導入雙導通比控制技術,增加了電壓增益的設計自由度,所以高電壓增益的達成,轉換器不必操作在極大的導通比。The effect of the present invention is that because the dual conduction ratio control technology is introduced, the design freedom of voltage gain is increased, so that high voltage gain is achieved without the converter having to operate at a great conduction ratio.
在本發明被詳細描述之前,應當注意在以下的說明內容中,類似的元件是以相同的編號來表示。Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numbers.
參閱圖2,本發明高電壓增益轉換器之一實施例,包含一第一電感L1
、一第一開關S1
、一第二開關S2
、一第二電感L2
、第一二極體D1
、一第二二極體D2
、一第一電容C1
、一第三二極體D3
、一第三開關S3
、一第二電容C2
、一輸出級2與一控制單元3。Referring to FIG. 2, an embodiment of the high voltage gain converter of the present invention includes a first inductor L 1 , a first switch S 1 , a second switch S 2 , a second inductor L 2 , and a first diode D 1 , a second diode D 2 , a first capacitor C 1 , a third diode D 3 , a third switch S 3 , a second capacitor C 2 , an
第一電感L1 具有一接收一直流電壓Vi的第一端與一第二端。The first inductor L 1 having a first end and a receiving end of a second DC voltage Vi.
第一開關S1 具有一電連接該第一電感L1 的第二端的第一端與一接地的第二端,且受控制切換於導通與不導通間;該第一開關S1 是一N型功率半導體電晶體,且該第一開關S1 的第一端是汲極,該第一開關S1 的第二端是源極。The first switch S 1 has a first terminal electrically connected to the second terminal of the first inductor L 1 and a grounded second terminal, and is controlled to switch between conducting and non-conducting; the first switch S 1 is a N type power semiconductor transistor, and a first terminal of the first switch S 1 is the drain, the second terminal of the first switch S 1 is the source.
第二開關S2 具有一電連接該第一電感L1 的第一端的第一端與一第二端,且受控制切換於導通與不導通間;第二開關S2 是一N型功率半導體電晶體,且該第二開關S2 的第一端是汲極,該第二開關S2 的第二端是源極。Having a second switch S 2 is electrically connected to a first end of the first inductor L 1, a first end and a second end, and controlled to switch between conducting and nonconducting; a second switch S 2 is N-type power the semiconductor transistor, and a first end of the second switch S 2 is a drain, the second terminal of the second switch S 2 is the source.
第二電感L2 具有一電連接該第二開關S2 的第二端的第一端與一電連接該第一開關S1 的第二端的第二端。The second inductor L 2 has a first end electrically connected to the second end of the second switch S 2 and a second end electrically connected to the second end of the first switch S 1.
第一二極體D1 具有一電連接該第一電感L1 的第一端的陽極,與一陰極。The first diode D 1 has an anode electrically connected to a first end of the first inductance of L 1, and a cathode.
第二二極體D2 具有一電連接該第一開關S1 的第二端的陰極,與一陽極。The second diode D 2 has a cathode electrically connected to the second end of the first switch S 1 and an anode.
第一電容C1 具有一電連接該第一二極體D1 的陰極的第一端與一電連接該第一電感L1 的第二端的第二端。The first capacitor C 1 is electrically connected with a cathode of the first diode D 1, the first inductor is electrically connected to a first terminal and a second terminal of a second L 1.
第三二極體D3 具有一電連接該第一電感L1 的第二端的陽極,與一陰極。The third diode D 3 having an anode electrically connected to a second terminal of the first inductance of L 1, and a cathode.
第三開關S3 具有一電連接該第三二極體D3 的陰極的第一端,與一電連接該第二開關S2 的第二端的第二端,且受控制切換於導通與不導通間。該第三開關S3 是一N型功率半導體電晶體,且該第三開關S3 的第一端是汲極,該第三開關S3 的第二端是源極。A first end, and an electrical switch S 3 having a third electrically connected to the cathode of the third diode D 3 is connected to the second end of the second end of the second switch S 2, and controlled to switch ON and not Conduction room. The third switch S 3 is an N-type power semiconductor transistor, the first and the third switch S 3 is a drain terminal, a second terminal of the third switch S 3 is the source.
第二電容C2 電連接該第二開關S2 的第二端與該第二二極體D2 的陽極之間。The second capacitor C 2 is electrically connected between the second end of the second switch S 2 and the anode of the second diode D 2.
輸出級2電連接該第一電容C1
的第一端與該第二電容C2
的第二端,用以提供一正比於該第一電容C1
的跨壓與該第二電容C2
的跨壓的加總的輸出電壓。該輸出級2包括一輸出二極體DO
與一輸出電容CO
。輸出二極體DO
具有一電連接該第一電容C1
的第一端的陽極,與一陰極。輸出電容CO
電連接於該輸出二極體DO
的陰極與該第二電容C2
的第二端之間。The
該控制單元3產生一切換該第一開關S1
的第一脈波調變信號、一切換該第二開關S2
的第二脈波調變信號與一切換該第三開關S3
的第三脈波調變信號,該第一脈波調變信號與該第二脈波調變信號具有相同的周期時間。The
參閱圖3、4,分別為本實施例的連續導通模式(Continuous Conduction Mode, CCM)、不連續導通模式(Discontinuous Conduction Mode, DCM)的操作時序圖,其中,參數 vgs1 、vgs2 、vgs3 分別代表控制該第一~第三開關S1 、S2 、 S3 是否導通的脈波信號的電壓,參數vL1 、vL2 分別代表該第一及第二電感L1 、 L2 的二端跨壓,參數iL1 、iL2 分別代表該第一及第二電感L1 、 L2 的電流,參數vD1 、vD2 、vDO 分別代表該第一二極體D1 、第二二極體D2 、輸出二極體DO 的二端跨壓,參數iD1 、iD2 、iDO 、iC1 、iC2 、iCO 分別代表該第一二極體D1 、第二二極體D2 、輸出二極體DO 、該第一電容C1 、第二電容C2 、輸出電容CO 的電流,參數TS 為第一脈波信號的週期時間。Refer to FIGS. 3 and 4, respectively, the operation timing diagrams of the continuous conduction mode (Continuous Conduction Mode, CCM) and the discontinuous conduction mode (DCM) of this embodiment, where the parameters v gs1 , v gs2 , and v gs3 Respectively represent the voltage of the pulse signal that controls whether the first to third switches S 1 , S 2 , S 3 are turned on, and the parameters v L1 and v L2 represent the two ends of the first and second inductors L 1 , L 2 respectively Across voltage, the parameters i L1 and i L2 represent the currents of the first and second inductors L 1 and L 2 respectively, and the parameters v D1 , v D2 , and v DO represent the first diode D 1 and the second diode respectively Body D 2 , output diode D O across the two ends, the parameters i D1 , i D2 , i DO , i C1 , i C2 , i CO represent the first diode D 1 , the second diode respectively D 2, the output diode D O, the first capacitor C 1, the second capacitor C 2, the current of the output capacitor C O, T S parameter is the cycle time of the first pulse signal.
以下為本實施例操作於CCM的三階段的各電路圖,其中,導通的元件以實線表示,不導通的元件以虛線表示,以下分別針對每一階段進行說明。The following is a circuit diagram of each of the three stages of CCM operation in this embodiment, in which the conductive elements are represented by solid lines, and the non-conductive elements are represented by dashed lines. The following describes each phase separately.
第一階段(時間:t0 ~t1 ):The first stage (time: t 0 ~t 1 ):
參閱圖3及圖5,第一開關S1 與第二開關S2 由不導通轉成導通,而第三開關S3 不導通,第一二極體D1 導通,第二二極體D2 導通,第三二極體D3 不導通,輸出二極體DO 不導通。3 and 5, the first switch S 1 and the second switch S 2 are turned from non-conducting to conducting, and the third switch S 3 is non-conducting, the first diode D 1 is conducting, and the second diode D 2 Conduction, the third diode D 3 is not conductive, and the output diode D O is not conductive.
第一電感L1 和第二電感L2 等效並聯且跨壓均為輸入電壓Vi ,其電感電流呈線性上升,因為兩個電感值相同均為L,因此斜率均為Vi /L,輸入電壓Vi 經由第一二極體D1 和第二二極體D2 對第一電容C1 和第二電容C2 充電,在本階段中The first inductor L 1 and the second inductor L 2 and the voltage across the equivalent parallel are input voltage V i, the inductance current increases linearly, because the two are identical inductance L, the slope are thus V i / L, a first input voltage V i via the diode D 1 and the second diode D 2 of the first capacitor C 1 and the second capacitor C 2 is charged at this stage in
當t=t1,第一開關S1 和第二開關S2 切換為不導通,第三開關S3 切換為導通時,本階段結束。When t=t1, the first switch S 1 and the second switch S 2 are switched to be non-conducting, and the third switch S 3 is switched to be conducting, this stage ends.
第二階段(時間:t0 ~t1 ):The second stage (time: t 0 ~t 1 ):
參閱圖3及圖6,第一開關S1 與第二開關S2 由導通轉成不導通,而第三開關S3 導通,第一二極體D1 不導通,第二二極體D2 不導通,第三二極體D3 導通,輸出二極體DO不導通。Referring to FIGS. 3 and 6, the first switch S 1 and the second switch S 2 are turned from conducting to non-conducting, and the third switch S 3 is conducting, the first diode D 1 is not conducting, and the second diode D 2 nonconductive, the third diode D 3 is turned on, the output diode DO nonconductive.
經由第三開關S3 和第三二極體D3 形成迴路,輸入電壓Vi 對等效串聯的第一電感L1 和第二電感L2 充電,此時第一電感L1 和第二電感L2 的跨壓皆為Vi /2,電感電流持續上升,而斜率為Vi /2L,在本階段中電感電流可表示為S 3 and the third diode D 3 is formed via a third switch circuit, a first input voltage V i to the equivalent series inductance of the second inductor L 1 and L 2 charging, while the first inductor L 1 and the second inductor The voltage across L 2 is V i /2, the inductor current continues to rise, and the slope is V i /2L. In this stage, the inductor current can be expressed as
當t=t2 ,第三開關S3 切換為不導通時,本階段結束。When t=t 2 and the third switch S 3 is switched to non-conducting, this stage ends.
第三階段(時間:t2 ):The third stage (time: t 2 ):
參閱圖3及圖7,第一開關S1 不導通,而第二開關S2 不導通,而第三開關S3 切換為不導通,第一二極體D1 不導通,第二二極體D2 不導通,第三二極體D3 不導通,輸出二極體DO 導通。Referring to Figures 3 and 7, the first switch S 1 is not conductive, the second switch S 2 is not conductive, and the third switch S 3 is switched to be non-conductive, the first diode D 1 is not conductive, and the second diode D 2 is not conducting, the third diode D 3 is not conducting, and the output diode D O is conducting.
本階段輸入電壓源Vi 、第一與第二電感L1 和L2 、第一電容C1 、第二電容C2 串聯連接,經由輸出二極體DO ,對輸出電容CO 及負載R傳送能量。第一電感L1 和第二電感L2 的跨壓為,其電流呈線性下降,在本階段中電感電流可表示為This stage of the input voltage source V i, connected to the first and second inductor L 1 and L 2, the first capacitor C 1, the second capacitor C 2 in series through the output diode D O, and the output load capacitance C O R Transfer energy. The voltage across the first inductor L 1 and the second inductor L 2 is , Its current decreases linearly, and the inductor current in this stage can be expressed as
當t=t3 ,第一開關S1 、第二開關S2 切換為導通,第三開關S3 保持不導通,本階段結束,進入下一個切換週期。When t=t 3 , the first switch S 1 and the second switch S 2 are switched to conduction, and the third switch S 3 remains non-conducting. This stage ends and the next switching cycle is entered.
以下為本實施例操作於DCM的四階段的各電路圖,其中,導通的元件以實線表示,不導通的元件以虛線表示,以下分別針對每一階段進行說明。The following is a circuit diagram of each of the four stages of operation in the DCM of this embodiment, in which the conductive elements are represented by solid lines, and the non-conductive elements are represented by dashed lines. The following describes each phase separately.
第一階段(時間:t0 ~t1 ):The first stage (time: t 0 ~t 1 ):
參閱圖4及圖5,本階段的操作原理與CCM操作的第一階段相同。在本階段第一電感L1 、第二電感L2 的電流最大值為。定義t=t1時的第一電感電流值,Referring to Figures 4 and 5, the operating principle of this stage is the same as the first stage of CCM operation. At this stage, the maximum current of the first inductor L 1 and the second inductor L 2 is . Define the first inductor current value when t=t1,
當t=t1,第一開關S1 和第二開關S2 切換為不導通,同時第三開關S3 切換為導通,本階段結束。When t=t1, the first switch S 1 and the second switch S 2 are switched to non-conducting, and the third switch S 3 is switched to conducting at the same time, and this stage ends.
第二階段(時間:t1 ~t2 ):The second stage (time: t 1 ~t 2 ):
參閱圖4及圖6,本階段的操作原理與CCM操作的第二階段相同。第一開關S1 和第二開關S2 為不導通,而第三開關S3 為導通。輸入電壓Vi 對第一電感L1 和第二電感L2 轉移能量,輸出電容CO 供應負載電流。第一電感L1 和第二電感L2 的電流最大值為。當t=t2 ,第三開關S3 切換為不導通,本階段結束。Referring to Figures 4 and 6, the operating principle of this stage is the same as the second stage of CCM operation. The first switch S 1 and the second switch S 2 are non-conductive, and the third switch S 3 is conductive. The input voltage V i transfers energy to the first inductor L 1 and the second inductor L 2 , and the output capacitor C O supplies load current. The maximum current of the first inductor L 1 and the second inductor L 2 is . When t=t 2 , the third switch S 3 is switched to be non-conducting, and this stage ends.
第三階段(時間:t2 ~t3 ):The third stage (time: t 2 ~t 3 ):
參閱圖4及圖7,本階段的操作原理與CCM操作的第三階段相同,第一至第三開關S1 ~S3 都不導通。輸出二極體DO 導通。輸入電壓Vi、第一電感L1 和第二電感L2 、第一電容C1 和第二電容C2 等效串聯對輸出電容CO 充電。第一電感L1 和第二電感L2 的電流直線下降,第一至第三開關S1 ~S3 的跨壓為Referring to FIG. 4 and FIG. 7, the operation principle of this stage is the same as that of the third stage of CCM operation, and the first to third switches S 1 to S 3 are not turned on. The output diode D O is turned on. The input voltage Vi, the first inductor L 1 and the second inductor L 2 , the first capacitor C 1 and the second capacitor C 2 are equivalently connected in series to charge the output capacitor C O. The currents of the first inductor L 1 and the second inductor L 2 decrease linearly, and the voltage across the first to third switches S 1 to S 3 is
當t=t3,當第一電感L1 和第二電感L2 的電流下降至0,輸出二極體DO 自然轉態為不導通,本階段結束。When t=t3, when the currents of the first inductor L 1 and the second inductor L 2 drop to 0, the output diode D O naturally turns into non-conducting state, and this stage ends.
第四階段(時間:t3 ~t4 ):The fourth stage (time: t 3 ~t 4 ):
參閱圖4及圖8,本階段所有開關及二極體均為不導通,第一電感L1 和第二電感L2 的電流。輸出電容CO 放電至負載,負載電流。當t=t4 ,第一開關S1 和第二開關S2 切換為導通,本階段結束,新的一個切換週期開始。Referring to Figure 4 and Figure 8, all switches and diodes are non-conducting at this stage, and the currents of the first inductor L 1 and the second inductor L 2 . The output capacitor C O is discharged to the load, the load current . When t=t 4 , the first switch S 1 and the second switch S 2 are switched on, this stage ends, and a new switching cycle starts.
> CCM模式電壓增益分析>> CCM mode voltage gain analysis>
對第一電感L1 和第二電感L2 應用伏-秒平衡定理(volt-second balance principle),因此可得:Apply the volt-second balance principle to the first inductance L 1 and the second inductance L 2, so that:
將操作模式中的電感電壓代入可得Substituting the inductor voltage in the operating mode into the available
整理可得CCM模式情況下,電壓增益MCCM 為In the case of CCM mode, the voltage gain M CCM is
從上式可知電壓增益具有導通比d1 和d2 兩個設計自由度。操作在CCM模式時,電壓增益對應於第一開關S1 與第二開關S2 的導通比d1 和d2 的曲線如圖9、10。It can be seen from the above formula that the voltage gain has two design degrees of freedom for the conduction ratio d 1 and d 2. When operating in the CCM mode, the voltage gain corresponding to the conduction ratios d 1 and d 2 of the first switch S 1 and the second switch S 2 is shown in Fig. 9 and Fig. 10.
> DCM模式電壓增益分析>> DCM mode voltage gain analysis>
當轉換器操作在不連續導通模式(DCM)時,由於電感依然滿足伏-秒平衡定理,所以可得When the converter is operating in discontinuous conduction mode (DCM), since the inductance still satisfies the volt-second balance theorem, it can be obtained
整理可得Organize available
(1) (1)
穩態時,輸出電容CO 的電流波形iCO ,其平均電流可表示為In the steady state, the current waveform i CO of the output capacitor C O , the average current can be expressed as
(2) (2)
(17)式中電感電流最大值與輸出電流IO 可分別計算如下(17) The maximum inductor current in the formula And the output current I O can be calculated separately as follows
(3) (3)
(4) (4)
將(1)(3)(4)式代入(2)式,可得Substituting formula (1)(3)(4) into formula (2), we can get
(5) (5)
穩態時,輸出電容CO 滿足安-秒平衡定理(amp-second balance principle),即,因此(5)式可化簡為In steady state, the output capacitor C O satisfies the amp-second balance principle, namely , Therefore (5) can be simplified to
(6) (6)
定義規一化電感時間常數(normalized inductor time constant):,將規一化電感時間常數代入(6)式,整理可得DCM模式的電壓增益為Define the normalized inductor time constant: , To normalize the inductance time constant Substituting into equation (6), we can get the voltage gain of DCM mode as
(7) (7)
從上式可知操作在DCM模式時,電壓增益是規一化電感時間常數及導通比d1 和d2 的函數。若以L=74.2μH,TS =20μs,R=1600Ω為例,經由計算,則電壓增益與導通比d1 和d2 的關係曲線如圖11、12,其中圖11是當d1 在不同的定值時,電壓增益與導通比d2 的關係曲線;另一方面,圖12是當導通比d2 在不同的定值時,電壓增益和導通比d1 的關係曲線。It can be seen from the above formula that when operating in DCM mode, the voltage gain is the normalized inductor time constant And the conduction ratio as a function of d 1 and d 2. If L=74.2μH, T S =20μs, R=1600Ω as an example, through calculation , The voltage gain and the conduction ratio d 1 and d 2 are shown in Fig. 11 and 12, where Fig. 11 is the relation curve of the voltage gain and the conduction ratio d 2 when d 1 is at different fixed values; on the other hand, Fig. 12 is the relationship curve between the voltage gain and the conduction ratio d 1 when the conduction ratio d 2 is at different fixed values.
>BCM操作模式分析>>BCM operation mode analysis>
當轉換器操作在邊界導通模式 (Boundary Conduction Mode,BCM)時,吾人可得CCM模式的電壓增益等於DCM模式的電壓增益,即When the converter is operating in Boundary Conduction Mode (BCM), we can get that the voltage gain of CCM mode is equal to the voltage gain of DCM mode, namely
MCCM =MDCM (8)M CCM =M DCM (8)
令邊界規一化電感時間常數為,則由上述公式的結果可推導得到Let the boundary normalization inductance time constant be , Then can be derived from the result of the above formula
(9) (9)
因此,若,則操作在CCM;若,則操作在DCM。Therefore, if , The operation is in CCM; if , The operation is in DCM.
>開關電壓應力分析>>Switching voltage stress analysis>
由轉換器操作原理分析可得第一至第三開關S1 ~S3 及每個二極體D1 、D2 、DO 在不同操作階段的跨壓,整理可知開關第一至第三開關S1 ~S3 的電應力分別為、。According to the analysis of the operation principle of the converter, the first to third switches S 1 to S 3 and the cross voltages of each diode D 1 , D 2 , and D O in different operation stages can be obtained. The first to third switches can be sorted out. The electrical stresses of S 1 ~S 3 are , .
該多個二極體D1 、D2 、D3 、DO 的電壓應力分別為、、。The voltage stresses of the multiple diodes D 1 , D 2 , D 3 , and D O are respectively , , .
區別於傳統升壓型轉換器的功率開關及二極體的電壓應力為輸出電壓,而本實施例的所有開關與二極體的電壓應力都小於輸出電壓。在高輸出電壓應用中,可使用低額定耐壓具有較低RDS(ON) 的MOSFETs,降低開關導通損失。另外,較低電壓應力的二極體可採用蕭特基二極體或導通壓降比較低的二極體,可降低導通損失,提升轉換器轉換效率。The voltage stress of the power switch and the diode which is different from the traditional boost converter is the output voltage, and the voltage stress of all the switches and diodes of this embodiment is less than the output voltage. In high output voltage applications, MOSFETs with low rated withstand voltage and lower R DS(ON) can be used to reduce switch conduction losses. In addition, a diode with lower voltage stress can be a Schottky diode or a diode with a relatively low conduction voltage drop, which can reduce the conduction loss and improve the conversion efficiency of the converter.
上述實施例,具有以下優點:The above embodiment has the following advantages:
一、由於導入雙導通比控制技術,增加了電壓增益的設計自由度,所以高電壓增益的達成,轉換器不必操作在極大的導通比。1. Due to the introduction of dual conduction ratio control technology, the design freedom of voltage gain is increased, so high voltage gain is achieved without the converter having to operate at a great conduction ratio.
二、由於第一至第三開關S1 ~S3 的電壓應力遠低於輸出電壓,所以可以使用導通阻抗較小的低額定耐壓電晶體,降低導通損失。2. Since the voltage stress of the first to third switches S 1 to S 3 is much lower than the output voltage, a low-rated piezoelectric crystal with a smaller on-resistance can be used to reduce the conduction loss.
三、由於第一與第二二極體D1 、D2 的電壓應力遠低於輸出電壓,所以可以使用導通壓降較小的二極體,降低導通損失。綜上所述,故確實能達成本發明之目的。3. Since the voltage stress of the first and second diodes D 1 and D 2 is much lower than the output voltage, a diode with a smaller turn-on voltage drop can be used to reduce the turn-on loss. In summary, it can indeed achieve the purpose of the invention.
惟以上所述者,僅為本發明之實施例而已,當不能以此限定本發明實施之範圍,凡是依本發明申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾,皆仍屬本發明專利涵蓋之範圍內。However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.
L1 :第一電感 S1 :第一開關 S2 :第二開關 L2 :第二電感 D1 :第一二極體 D2 :第二二極體 C1 :第一電容 D3 :第三二極體 S3 :第三開關 C2 :第二電容 2:輸出級 3:控制單元 Vi:直流電壓 CO :輸出電容 DO :輸出二極體L 1 : first inductance S 1 : first switch S 2 : second switch L 2 : second inductance D 1 : first diode D 2 : second diode C 1 : first capacitor D 3 : first Triode S 3 : third switch C 2 : second capacitor 2: output stage 3: control unit Vi: DC voltage C O : output capacitor DO : output diode
本發明之其他的特徵及功效,將於參照圖式的實施方式中清楚地呈現,其中: 圖1是一種習知的升壓轉換器的一電路圖; 圖2是本發明高電壓增益轉換器的一實施例的一電路圖; 圖3是該實施例的連續導通模式一操作時序圖; 圖4是該實施例的不連續導通模式一操作時序圖; 圖5是該實施例操作於第一階段的一電路圖; 圖6是該實施例操作於第二階段的一電路圖; 圖7是該實施例操作於第三階段的一電路圖; 圖8是該實施例操作於第四階段的一電路圖; 圖9是該實施例操作在連續導通模式的不同導通比和電壓增益的一關係曲線圖; 圖10是該實施例操作在連續導通模式的不同導通比和電壓增益的一關係曲線圖; 圖11是該實施例操作在不連續導通模式的不同導通比和電壓增益的一關係曲線圖;及 圖12是該實施例操作在不連續導通模式的不同導通比和電壓增益的一關係曲線圖。Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a circuit diagram of a conventional boost converter; 2 is a circuit diagram of an embodiment of the high voltage gain converter of the present invention; FIG. 3 is an operation timing diagram of the continuous conduction mode of this embodiment; FIG. 4 is an operation timing diagram of the discontinuous conduction mode of this embodiment; Figure 5 is a circuit diagram of this embodiment operating in the first stage; Figure 6 is a circuit diagram of this embodiment operating in the second stage; FIG. 7 is a circuit diagram of this embodiment operating in the third stage; FIG. 8 is a circuit diagram of this embodiment operating in the fourth stage; FIG. 9 is a graph showing the relationship between different conduction ratios and voltage gains of the embodiment operating in continuous conduction mode; FIG. 10 is a graph showing the relationship between different conduction ratios and voltage gains of the embodiment operating in continuous conduction mode; FIG. 11 is a graph of the relationship between different conduction ratios and voltage gains of the embodiment operating in the discontinuous conduction mode; and FIG. 12 is a graph showing the relationship between different conduction ratios and voltage gains when the embodiment operates in a discontinuous conduction mode.
L1 :第一電感L 1 : first inductance
S1 :第一開關S 1 : The first switch
S2 :第二開關S 2 : The second switch
L2 :第二電感L 2 : second inductance
D1 :第一二極體D 1 : The first diode
D2 :第二二極體D 2 : The second diode
C1 :第一電容C 1 : The first capacitor
D3 :第三二極體D 3 : The third diode
S3 :第三開關S 3 : third switch
C2 :第二電容C 2 : second capacitor
2:輸出級2: output stage
3:控制單元3: control unit
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US11929016B2 (en) | 2021-12-17 | 2024-03-12 | Macroblock, Inc. | Scan-type display apparatus capable of short circuit detection, and scan driver thereof |
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