TW202222018A

TW202222018A - Power device and operation method thereof

Info

Publication number: TW202222018A
Application number: TW109141670A
Authority: TW
Inventors: 賴建安; 張濬哲; 廖建堯; 吳炳昇; 陳易; 許昌源
Original assignee: 台達電子工業股份有限公司
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2022-06-01
Also published as: TWI777313B

Abstract

The present disclosure provides a power device, which includes a power factor correction circuit, an auxiliary capacitor, a switching device, an auxiliary boost circuit, a controller, and a voltage conversion device. A first end of the switching device is electrically connected to the output end of the power factor correction circuit, and a second end of the switching device is electrically connected to one end of the auxiliary capacitor. An output terminal of the auxiliary boost circuit is electrically connected to the output end of the power factor correction circuit, an input terminal of the auxiliary boost circuit is electrically connected to a middle end of the switching device, and a ground terminal of the auxiliary boost circuit is electrically connected to another end of the auxiliary capacitor. The controller is electrically connected to the switching device and the auxiliary boost circuit. The input end of the voltage conversion device is electrically connected to the output end of the power factor correction circuit.

Description

電源裝置及其操作方法Power supply device and method of operation thereof

本發明是有關於一種裝置及方法，且特別是有關於一種電源裝置及其操作方法。The present invention relates to an apparatus and method, and more particularly, to a power supply apparatus and a method of operation thereof.

在電源供應器應用環境中，系統資料是極為重要的資產，而在輸入電壓不穩定的情況底下，更是需要穩定的輸出電壓來維持系統運作或存檔，於是在輸入電源於正常供電期間突然斷電時，電源供應器輸出電力維持時間（hold up time）的要求與日俱增，由10ms 到20ms不等。而該維持時間的設計，會直接影響到第二級直流轉換器的工作範圍的設計。In the power supply application environment, system data is an extremely important asset, and in the case of unstable input voltage, a stable output voltage is required to maintain system operation or archive, so the input power is suddenly cut off during normal power supply. When the power is turned on, the requirements for the hold up time of the output power of the power supply are increasing day by day, ranging from 10ms to 20ms. The design of the holding time will directly affect the design of the working range of the second-stage DC converter.

現行做法是將功率因數校正器的輸出電容量加大，這樣做會導致功率密度下降。或者將後級輸入的工作範圍加大，但通常越大的工作範圍，其正常工作時的效率就會越低。The current practice is to increase the output capacitance of the power factor corrector, which will lead to a decrease in power density. Or increase the working range of the post-stage input, but generally the larger the working range, the lower the efficiency during normal operation.

習知技術一，是在功率因數校正器後級，串聯加入升壓（boost）電路，在輸入交流（AC）電壓消失時，提供後級能量來維持輸出。但其因為與電路為串聯形式，在正常操作時會增加損耗，降低總體效率。並且當輸入瞬間掉電再回復時，因為主電容之能量已下降至極低，輸入端會有一個極大的湧浪電流（inrush current），該電流可能會導致輸入端的斷路器跳閘，或不斷電系統（UPS）進入保護。The first conventional technique is to add a boost circuit in series at the post-stage of the power factor corrector, so as to provide post-stage energy to maintain the output when the input alternating current (AC) voltage disappears. However, because it is in series with the circuit, it will increase losses during normal operation and reduce the overall efficiency. And when the input is powered off instantaneously and then recovers, because the energy of the main capacitor has dropped to a very low level, there will be a huge inrush current at the input end, which may cause the circuit breaker at the input end to trip or be disconnected. System (UPS) entry protection.

習知技術二，是在功率因數校正器後級，並聯方式加入一個三個開關降壓型（buck）電路，其中一個開關用意是控制電容充電，另兩個開關形成降壓型電路，在輸入交流電壓消失時，提供主電容能量來維持輸出。然而降壓型電路對於輸出電壓的維持能力是有限的。The second conventional technique is to add a three-switch step-down (buck) circuit in parallel at the rear stage of the power factor corrector. One of the switches is used to control the charging of the capacitor, and the other two switches form a step-down circuit. When the AC voltage disappears, the main capacitor energy is provided to maintain the output. However, the buck circuit's ability to maintain the output voltage is limited.

本發明提出一種電源裝置及其操作方法，改善先前技術的問題。The present invention provides a power supply device and an operating method thereof, which improve the problems of the prior art.

在本發明的一實施例中，本發明所提出的電源裝置包括功率因數校正器、輔助電容器、切換裝置、輔助升壓電路、控制器以及電壓轉換裝置。切換裝置具有第一端、第二端與中間端，第一端電性連接功率因數校正器的輸出端，第二端電性連接輔助電容器的一端。輔助升壓電路的輸出端電性連接功率因數校正器的輸出端，輔助升壓電路的輸入端電性連接中間端，輔助升壓電路的接地端電性連接輔助電容器的另一端。控制器電性連接切換裝置及輔助升壓電路，電壓轉換裝置具有輸入端電性連接功率因數校正器的輸出端。當功率因數校正器停止工作時，控制器控制切換裝置與輔助升壓電路的切換，使輔助電容器所儲存的電力可透過切換裝置與輔助升壓電路來對功率因數校正器的輸出端進行穩壓。In an embodiment of the present invention, the power supply device proposed by the present invention includes a power factor corrector, an auxiliary capacitor, a switching device, an auxiliary boost circuit, a controller, and a voltage conversion device. The switching device has a first end, a second end and an intermediate end, the first end is electrically connected to the output end of the power factor corrector, and the second end is electrically connected to one end of the auxiliary capacitor. The output end of the auxiliary boost circuit is electrically connected to the output end of the power factor corrector, the input end of the auxiliary boost circuit is electrically connected to the middle end, and the ground end of the auxiliary boost circuit is electrically connected to the other end of the auxiliary capacitor. The controller is electrically connected to the switching device and the auxiliary boosting circuit, and the voltage converting device has an input end that is electrically connected to an output end of the power factor corrector. When the power factor corrector stops working, the controller controls the switching between the switching device and the auxiliary booster circuit, so that the power stored in the auxiliary capacitor can regulate the output of the power factor corrector through the switching device and the auxiliary booster circuit. .

在本發明的一實施例中，本發明所提出的電源裝置的操作方法，電源裝置包括功率因數校正器、電壓轉換裝置以及與電壓轉換裝置並聯設置於功率因數校正器的輸出端的輔助電路，操作方法包括以下步驟：（A）當功率因數校正器動作時，控制輔助電路中的切換裝置於第一切換狀態，使功率因數校正器的輸出端透過切換裝置對輔助電路中的輔助電容器進行充電；（B）當功率因數校正器停止工作未超出一預設時間時，將切換裝置維持於第一切換狀態；（C）當功率因數校正器停止工作超出預設時間時，將切換裝置切換至第二切換狀態，使輔助電容器分別透過切換裝置與輔助電路中的輔助升壓電路來對功率因數校正器的輸出端進行穩壓。In an embodiment of the present invention, the operation method of a power supply device proposed by the present invention, the power supply device includes a power factor corrector, a voltage conversion device, and an auxiliary circuit arranged in parallel with the voltage conversion device at the output end of the power factor corrector. The method includes the following steps: (A) when the power factor corrector operates, controlling the switching device in the auxiliary circuit to be in a first switching state, so that the output end of the power factor corrector charges the auxiliary capacitor in the auxiliary circuit through the switching device; (B) when the power factor corrector stops working within a preset time, the switching device is maintained in the first switching state; (C) when the power factor corrector stops working beyond the preset time, the switching device is switched to the first switching state. In two switching states, the auxiliary capacitor regulates the output end of the power factor corrector through the switching device and the auxiliary boosting circuit in the auxiliary circuit respectively.

綜上所述，本發明之技術方案與現有技術相比具有明顯的優點和有益效果。由於未來高效率高功率密度的要求越來越嚴峻，本發明提升維持時間之技巧可以大幅提升工作效率，藉由減少主電容器電容的尺寸來提高功率密度，輔助電路易於模組化設計，並且沒有傳統式輔助升壓的副作用，極具技術價值。To sum up, the technical solution of the present invention has obvious advantages and beneficial effects compared with the prior art. As the requirements for high efficiency and high power density are becoming more and more severe in the future, the technique of improving the maintenance time of the present invention can greatly improve the work efficiency. By reducing the size of the main capacitor, the power density is improved, the auxiliary circuit is easy to be modularized, and there is no The side effects of traditional auxiliary boost are of great technical value.

以下將以實施方式對上述之說明作詳細的描述，並對本發明之技術方案提供更進一步的解釋。The above description will be described in detail in the following embodiments, and further explanations will be provided for the technical solution of the present invention.

為了使本發明之敘述更加詳盡與完備，可參照所附之圖式及以下所述各種實施例，圖式中相同之號碼代表相同或相似之元件。另一方面，眾所週知的元件與步驟並未描述於實施例中，以避免對本發明造成不必要的限制。For a more detailed and complete description of the present invention, reference may be made to the accompanying drawings and the various embodiments described below, wherein the same numbers in the drawings represent the same or similar elements. On the other hand, well-known elements and procedures have not been described in the embodiments in order not to unnecessarily limit the present invention.

於實施方式與申請專利範圍中，涉及『連接』之描述，其可泛指一元件透過其他元件而間接耦合至另一元件，或是一元件無須透過其他元件而直接連結至另一元件。In the embodiments and the scope of the patent application, the description related to "connection" can generally refer to that an element is indirectly coupled to another element through other elements, or that an element is directly connected to another element without passing through other elements.

於實施方式與申請專利範圍中，涉及『源極/汲極』之描述，其可泛指一元件可視實際應用而做為源極或汲極。In the embodiments and the scope of the patent application, the description related to "source/drain" can generally refer to a device that can be used as a source or a drain depending on practical applications.

於實施方式與申請專利範圍中，除非內文中對於冠詞有所特別限定，否則『一』與『該』可泛指單一個或複數個。In the embodiments and the scope of the patent application, unless there is a special limitation on the article in the context, "a" and "the" may refer to a single or plural.

本文中所使用之『約』、『大約』或『大致』係用以修飾任何可些微變化的數量，但這種些微變化並不會改變其本質。於實施方式中若無特別說明，則代表以『約』、『大約』或『大致』所修飾之數值的誤差範圍一般是容許在百分之二十以內，較佳地是於百分之十以內，而更佳地則是於百分之五以內。As used herein, "about", "approximately" or "approximately" is used to modify any quantity that may vary slightly, but which does not alter its essence. If there is no special description in the embodiment, it means that the error range of the numerical value modified by "about", "approximately" or "approximately" is generally allowed within 20%, preferably within 10%. within, and more preferably within five percent.

第1圖是依照本發明一實施例之一種電源裝置100的電路圖。如第1圖所示，在功率因數校正器110後級，加入一個輔助電路120。輔助電路120包括輔助升壓電路121、切換裝置122以及輔助電容器C1。在架構上，切換裝置122的第一端125與第二端127可為兩相對的末端，切換裝置122的中間端126可為介於第一端125與第二端127之間的節點，切換裝置122的第一端125電性連接功率因數校正器110的輸出端111，輔助電容器C1的一端電性連接切換裝置122的第二端127，輔助升壓電路121的輸出端101電性連接功率因數校正器110的輸出端111，輔助升壓電路121的輸入端102電性連接切換裝置122的中間端126，輔助升壓電路121的接地端103電性連接輔助電容器C1的另一端。控制器130電性連接功率因數校正器110、切換裝置122及輔助升壓電路121，電壓轉換裝置140（如：直流對直流轉換器）與輔助電路120並聯設置，電壓轉換裝置140的輸入端141電性連接功率因數校正器110的輸出端111。電壓轉換裝置140的輸出電性連接負載142。功率因數校正器110的接地端112、輔助升壓電路121的接地端103與電壓轉換裝置140的接地端143共地。實作上，控制器130可泛指電源裝置100中的一個、多個或全部的控制電路，亦可選擇性涵蓋外部控制電路，熟習此項技藝者當視實際應用，彈性設計之。FIG. 1 is a circuit diagram of a power supply device 100 according to an embodiment of the present invention. As shown in FIG. 1, an auxiliary circuit 120 is added after the power factor corrector 110. The auxiliary circuit 120 includes an auxiliary booster circuit 121, a switching device 122, and an auxiliary capacitor C1. Structurally, the first end 125 and the second end 127 of the switching device 122 can be two opposite ends, and the middle end 126 of the switching device 122 can be a node between the first end 125 and the second end 127 . The first terminal 125 of the device 122 is electrically connected to the output terminal 111 of the power factor corrector 110 , one terminal of the auxiliary capacitor C1 is electrically connected to the second terminal 127 of the switching device 122 , and the output terminal 101 of the auxiliary boost circuit 121 is electrically connected to the power The output terminal 111 of the factor corrector 110 and the input terminal 102 of the auxiliary boost circuit 121 are electrically connected to the middle terminal 126 of the switching device 122 , and the ground terminal 103 of the auxiliary boost circuit 121 is electrically connected to the other terminal of the auxiliary capacitor C1 . The controller 130 is electrically connected to the power factor corrector 110 , the switching device 122 and the auxiliary boosting circuit 121 , the voltage converting device 140 (eg, a DC-DC converter) is arranged in parallel with the auxiliary circuit 120 , and the input terminal 141 of the voltage converting device 140 The output terminal 111 of the power factor corrector 110 is electrically connected. The output of the voltage conversion device 140 is electrically connected to the load 142 . The ground terminal 112 of the power factor corrector 110 , the ground terminal 103 of the auxiliary boost circuit 121 and the ground terminal 143 of the voltage conversion device 140 share the same ground. In practice, the controller 130 may generally refer to one, more or all control circuits in the power supply device 100 , and may also selectively include external control circuits. Those skilled in the art should flexibly design them according to practical applications.

當輸入電源162斷電時，控制器可送出禁能訊號使功率因數校正器110停止工作，並透過切換開關S5（如：雙載子接面電晶體）藉以對切換裝置122進行切換，且啟動輔助升壓電路121，使輔助電容器C1所儲存的電力可透過切換裝置122與輔助升壓電路121，對功率因數校正器110的輸出端111進行穩壓，亦即將輔助電容器C1的能量回灌至主迴路（如：功率因數校正器110），使功率因數校正器110的輸出端111電壓保持在某個電壓水平之上（如：功率因數校正器110在正常運作時，輸出端111電壓的95%以上），以維持後段功率級（如：電壓轉換裝置140及負載142）的操作。此操作可以使得後段功率級的工作範圍縮小，因此可以設計在最佳工作點。When the input power supply 162 is powered off, the controller can send a disable signal to stop the power factor corrector 110 from working, and switch the switching device 122 through the switch S5 (eg, a dual junction transistor), and start The auxiliary booster circuit 121 enables the power stored in the auxiliary capacitor C1 to regulate the output terminal 111 of the power factor corrector 110 through the switching device 122 and the auxiliary booster circuit 121 , that is, the energy of the auxiliary capacitor C1 is recharged to The main loop (eg: power factor corrector 110 ) keeps the voltage of the output terminal 111 of the power factor corrector 110 above a certain voltage level (eg: when the power factor corrector 110 is in normal operation, the voltage of the output terminal 111 is 95% % or more) to maintain the operation of the subsequent power stage (eg, the voltage conversion device 140 and the load 142 ). This operation can make the operating range of the rear power stage narrow, so it can be designed at the optimal operating point.

為了對上述電源裝置100的硬體架構做更進一步的闡述，請參照第1、2圖，第2圖是依照本發明一實施例之一種電源裝置100的電路圖。在第2圖中，輔助升壓電路121包括輔助二極體D1、輔助開關S3以及輔助電感器L1。在架構上，輔助二極體D1的陰極電性連接輔助升壓電路121的輸出端101，且電性連接功率因數校正器110的輸出端111。輔助開關S3（如：N通道增強型金氧半場效電晶體）的一端（如：汲極）電性連接輔助二極體D1的陽極，輔助開關S3的另一端（如：源極）電性連接接地端103，輔助開關S3的控制端（如：閘極）耦接控制器130。輔助電感器L1的一端電性連接輔助開關S3的一端，輔助電感器L1的另一端電性連接輔助升壓電路121的輸入端102。In order to further illustrate the hardware structure of the power supply device 100, please refer to FIGS. 1 and 2. FIG. 2 is a circuit diagram of a power supply device 100 according to an embodiment of the present invention. In FIG. 2, the auxiliary booster circuit 121 includes an auxiliary diode D1, an auxiliary switch S3, and an auxiliary inductor L1. Structurally, the cathode of the auxiliary diode D1 is electrically connected to the output terminal 101 of the auxiliary boost circuit 121 and is electrically connected to the output terminal 111 of the power factor corrector 110 . One end (eg: drain) of the auxiliary switch S3 (eg: N-channel enhancement mode MOSFET) is electrically connected to the anode of the auxiliary diode D1, and the other end (eg: source) of the auxiliary switch S3 is electrically connected Connected to the ground terminal 103 , the control terminal (eg, gate) of the auxiliary switch S3 is coupled to the controller 130 . One end of the auxiliary inductor L1 is electrically connected to one end of the auxiliary switch S3 , and the other end of the auxiliary inductor L1 is electrically connected to the input end 102 of the auxiliary boost circuit 121 .

在本發明的一實施例中，切換裝置122可為背靠背裝置，其包括第一半導體開關S1以及第二半導體開關S2。在架構上，第一半導體開關S1（如：N通道增強型金氧半場效電晶體）的一端（如：汲極）電性連接第一端125及功率因數校正器110的輸出端111，第一半導體開關S1的另一端（如：源極）電性連接中間端126及輔助升壓電路121的輸入端102，第一半導體開關S1具有第一本體二極體D11，第一本體二極體D11的陰極與陽極分別電性連接第一半導體開關S1的一端與另一端。第二半導體開關S2（如：N通道增強型金氧半場效電晶體）的一端（如：源極）電性連接第一半導體開關S1的另一端、中間端126及輔助升壓電路121的輸入端102，第二半導體開關S2的另一端（如：汲極）電性連接第二端127及輔助電容器C1的一端，第二半導體開關S2具有第二本體二極體D12，第二本體二極體D12的陽極與陰極分別電性連接第二半導體開關S2的一端與另一端。In an embodiment of the present invention, the switching device 122 can be a back-to-back device, which includes a first semiconductor switch S1 and a second semiconductor switch S2. Structurally, one end (such as the drain) of the first semiconductor switch S1 (such as an N-channel enhancement mode MOSFET) is electrically connected to the first end 125 and the output end 111 of the power factor corrector 110 . The other end (eg, source) of a semiconductor switch S1 is electrically connected to the intermediate terminal 126 and the input terminal 102 of the auxiliary boost circuit 121 . The first semiconductor switch S1 has a first body diode D11 , which is The cathode and the anode of D11 are respectively electrically connected to one end and the other end of the first semiconductor switch S1 . One end (such as the source) of the second semiconductor switch S2 (such as an N-channel enhancement mode MOSFET) is electrically connected to the other end of the first semiconductor switch S1 , the middle end 126 and the input of the auxiliary boost circuit 121 Terminal 102, the other terminal (eg: drain) of the second semiconductor switch S2 is electrically connected to the second terminal 127 and one terminal of the auxiliary capacitor C1, the second semiconductor switch S2 has a second body diode D12, the second body diode The anode and the cathode of the body D12 are electrically connected to one end and the other end of the second semiconductor switch S2, respectively.

在本發明的一實施例中，切換裝置122更包括限流電阻器R。在架構上，限流電阻器R電性連接於第一半導體開關S1與功率因數校正器110的輸出端111之間。或者，在本發明的另一實施例中，藉由控制器130控制第一半導體開關S1的電流流量，從而省略限流電阻器R。In an embodiment of the present invention, the switching device 122 further includes a current limiting resistor R. Structurally, the current limiting resistor R is electrically connected between the first semiconductor switch S1 and the output end 111 of the power factor corrector 110 . Alternatively, in another embodiment of the present invention, the current flow of the first semiconductor switch S1 is controlled by the controller 130, so that the current limiting resistor R is omitted.

在本發明的一實施例中，功率因數校正器110包括主電容器C2、二極體D2、開關S4以及第一電感器L2。在架構上，主電容器C2的二端分別電性連接功率因數校正器110的輸出端111與接地端112，且分別電性連接輔助升壓電路的輸出端101與接地端103。二極體D2的陰極電性連接輔助二極體D1的陰極。開關S4（如：N通道增強型金氧半場效電晶體）的二端（如：汲極、源極）分別電性連接二極體D2的陽極與接地端112，開關S4的控制端（如：閘極）耦接控制器130。第一電感器L2的二端分別電性連接二極體D2的陽極與整流器160，整流器160電性連接輸入電源162。In an embodiment of the present invention, the power factor corrector 110 includes a main capacitor C2, a diode D2, a switch S4, and a first inductor L2. Structurally, the two terminals of the main capacitor C2 are electrically connected to the output terminal 111 and the ground terminal 112 of the power factor corrector 110 respectively, and are respectively electrically connected to the output terminal 101 and the ground terminal 103 of the auxiliary boost circuit. The cathode of the diode D2 is electrically connected to the cathode of the auxiliary diode D1. The two terminals (eg: drain, source) of the switch S4 (eg: N-channel enhancement mode MOSFET) are respectively electrically connected to the anode of the diode D2 and the ground terminal 112, and the control terminal of the switch S4 (eg : gate) is coupled to the controller 130 . Two ends of the first inductor L2 are respectively electrically connected to the anode of the diode D2 and the rectifier 160 , and the rectifier 160 is electrically connected to the input power source 162 .

在本發明的一實施例中，電源裝置100更包括第二電感器150以及倍壓電路152。在架構上，第二電感器150與第一電感器L2電感耦合，倍壓電路152電性連接第二電感器150。In an embodiment of the present invention, the power supply device 100 further includes a second inductor 150 and a voltage doubling circuit 152 . Structurally, the second inductor 150 is inductively coupled with the first inductor L2 , and the voltage doubling circuit 152 is electrically connected to the second inductor 150 .

在本發明的一實施例中，電源裝置100更包括光耦合器170。在架構上，光耦合器170電性連接倍壓電路152、控制器130與切換裝置122。In an embodiment of the present invention, the power supply device 100 further includes an optical coupler 170 . Structurally, the optocoupler 170 is electrically connected to the voltage doubling circuit 152 , the controller 130 and the switching device 122 .

在本發明的一實施例中，電源裝置100更包括切換開關S5（如：雙載子接面電晶體）。在架構上，切換開關S5的一端（如：射極）電性連接第一半導體開關S1的另一端（如：源極），而另一端（如：集極）電性連接第二半導體開關S2的控制端（如：閘極），切換開關S5的控制端（如：基極）電性連接第一半導體開關S1的控制端（如：閘極）並耦接控制器130。藉此，控制器130可以僅使用一隻控制腳位，就可讓第一、第二半導體開關S1、S2的控制訊號一定是反向。換言之，第一半導體開關S1導通，第二半導體開關S2就關斷；反之，第一半導體開關S1關斷，第二半導體開關S2就導通。此為本發明的其中一實施例，然不以此為限，本發明的第一半導體開關S1與第二半導體開關S2也可直接由控制器130分別提供獨立的控制訊號做控制。In an embodiment of the present invention, the power supply device 100 further includes a switch S5 (eg, a bipolar junction transistor). Structurally, one end (eg, the emitter) of the switch S5 is electrically connected to the other end (eg, the source) of the first semiconductor switch S1 , and the other end (eg, the collector) is electrically connected to the second semiconductor switch S2 The control terminal (eg gate) of the switch S5 is electrically connected to the control terminal (eg gate) of the first semiconductor switch S1 and coupled to the controller 130 . In this way, the controller 130 can only use one control pin, so that the control signals of the first and second semiconductor switches S1 and S2 must be reversed. In other words, when the first semiconductor switch S1 is turned on, the second semiconductor switch S2 is turned off; otherwise, when the first semiconductor switch S1 is turned off, the second semiconductor switch S2 is turned on. This is one embodiment of the present invention, but it is not limited thereto. The first semiconductor switch S1 and the second semiconductor switch S2 of the present invention can also be directly controlled by the controller 130 respectively providing independent control signals.

具體而言，於運作時，由於一次側功率因數校正器110需要偵測交流喪失（AC loss），以確保輸入電源162斷電，但其偵測需要做些延遲，避免於交流電於正常零交越點時誤動作，因此電源裝置100的運作可分為三個區間：正常情況、交流喪失未超出預設時間、交流喪失已超出預設時間。Specifically, during operation, the primary side power factor corrector 110 needs to detect AC loss to ensure that the input power supply 162 is powered off, but the detection needs to be delayed to avoid the normal zero-crossing of the AC power. The operation of the power supply device 100 can be divided into three intervals: the normal situation, the AC loss does not exceed the preset time, and the AC loss has exceeded the preset time.

於正常情況（即，交流不掉電）下，輸入電源162提供交流電，透過整流器160轉換為直流電，控制器130可藉由調制電壓Vc4給開關S4的控制端，以控制開關S4交替地導通與關斷，使功率因數校正器110動作，另可透過第一電感器L2耦合電力至第二電感器150，使倍壓電路152提供輔助電源Vcc給切換裝置122，控制器130並送出控制訊號以透過切換開關S5導通第一半導體開關S1並關斷第二半導體開關S2，輔助開關S3處於關斷狀態，使輔助升壓電路121不動作，功率因數校正器110的輸出端111的電壓透過第一半導體開關S1及第二本體二極體D12對輔助電容器C1進行充電。充電完成後，此迴路幾乎不耗電，因此在一般工作狀況下不會造成損耗而降低電源轉換效率。Under normal conditions (ie, the AC is not powered down), the input power supply 162 provides AC power, which is converted into DC power through the rectifier 160. The controller 130 can control the switch S4 to alternately turn on and off by modulating the voltage Vc4 to the control terminal of the switch S4. The power factor corrector 110 is turned off, and the power can be coupled to the second inductor 150 through the first inductor L2, so that the voltage doubling circuit 152 can provide the auxiliary power Vcc to the switching device 122, and the controller 130 can send a control signal By turning on the first semiconductor switch S1 and turning off the second semiconductor switch S2 through the switch S5, the auxiliary switch S3 is turned off, so that the auxiliary boost circuit 121 does not operate, and the voltage of the output end 111 of the power factor corrector 110 passes through the first semiconductor switch S3. A semiconductor switch S1 and a second body diode D12 charge the auxiliary capacitor C1. After the charging is completed, this circuit consumes almost no power, so it will not cause losses and reduce the power conversion efficiency under normal working conditions.

於交流喪失未超出預設時間（如：約2ms），亦即輸入電源162斷電，第一半導體開關S1維持導通且第二半導體開關S2維持關斷，功率因數校正器110停止工作未超出預設時間，輔助開關S3亦維持關斷狀態，此時主電容器C2因提供電力給電壓轉換裝置140，故其電壓低於輔助電容器C1的電壓，使第二本體二極體D12為截止狀態。When the AC loss does not exceed a preset time (eg, about 2ms), that is, the input power supply 162 is powered off, the first semiconductor switch S1 remains on and the second semiconductor switch S2 remains off, and the power factor corrector 110 stops working within the preset time. When the time is set, the auxiliary switch S3 also maintains the off state. At this time, the voltage of the main capacitor C2 is lower than the voltage of the auxiliary capacitor C1 because the main capacitor C2 provides power to the voltage conversion device 140, so that the second body diode D12 is in the off state.

於交流喪失超出預設時間，亦即功率因數校正器110停止工作超出預設時間，控制器130可送出一與原先反相的控制訊號以透過切換開關S5關斷第一半導體開關S1並導通第二半導體開關S2，並藉由調制電壓Vc3給輔助開關S3的控制端，以控制輔助開關S3交替地導通與關斷，使輔助升壓電路121動作。由於此時輔助電容器C1的電壓高於主電容器C2的電壓，因此在電流路徑上會有一路是輔助電容器C1透過第二半導體開關S2及第一本體二極體D11對主電容器C2進行充電，另一路則是透過輔助升壓電路121中輔助開關S3受控制器130所提供的脈波寬度調變（PWM）訊號控制，以對主電容器C2進行充電。當輔助電容器C1的電壓持續下降，輔助開關S3的脈波寬度調變（PWM）控制訊號的責任週期越來越大，來達到使主電容器C2穩壓，即可達到加長維持時間（hold up time）的效果。When the AC loss exceeds the preset time, that is, the power factor corrector 110 stops working for more than the preset time, the controller 130 can send a control signal with an opposite phase to the original to turn off the first semiconductor switch S1 and turn on the second semiconductor switch S1 through the switch S5. The two semiconductor switches S2 are controlled by the modulation voltage Vc3 to the control terminal of the auxiliary switch S3 to control the auxiliary switch S3 to be turned on and off alternately, so that the auxiliary booster circuit 121 operates. Since the voltage of the auxiliary capacitor C1 is higher than the voltage of the main capacitor C2 at this time, there will be one path in the current path where the auxiliary capacitor C1 charges the main capacitor C2 through the second semiconductor switch S2 and the first body diode D11, and the other way is to charge the main capacitor C2 through the second semiconductor switch S2 and the first body diode D11. One channel is controlled by the pulse width modulation (PWM) signal provided by the controller 130 through the auxiliary switch S3 in the auxiliary boost circuit 121 to charge the main capacitor C2. When the voltage of the auxiliary capacitor C1 continues to drop, the duty cycle of the pulse width modulation (PWM) control signal of the auxiliary switch S3 becomes larger and larger, so as to stabilize the main capacitor C2 and prolong the hold up time. )Effect.

由於主迴路上的主電容器C2會被維持在一個高點，若輸入電源162瞬間掉電並回復時，不會產生極大的湧浪電流，進而保護線路上所有元件。Since the main capacitor C2 on the main circuit will be maintained at a high point, if the input power supply 162 is powered off instantaneously and is restored, it will not generate a huge inrush current, thereby protecting all components on the line.

另一方面，由於現今電源供應器瓦特數需求與日俱增，且維持時間需求越來越長，但因為關機時會因主電容器C2電壓降低而使後級隔離級電路（如：直流對直流轉換器）之一次側電流逐漸增加，甚至高於開關（如：金氧半場效電晶體）本身耐流大小而必需選用更高耐流的半導體規格，而輔助電路120架構可以在關機時使隔離級之輸入電壓箝制固定的電壓值，進而延長後級電源轉換器之可工作時間，而不須更換更高耐流的元件。On the other hand, due to the increasing wattage requirements of today's power supplies and the need for longer maintenance times, the subsequent isolation stage circuits (such as DC-DC converters) will be reduced due to the reduction of the voltage of the main capacitor C2 during shutdown. The primary side current gradually increases, even higher than the current withstand size of the switch (such as: metal oxide semi-field effect transistor) itself, so it is necessary to choose a higher current withstand semiconductor specification, and the auxiliary circuit 120 structure can make the input of the isolation stage when the power is turned off. The voltage is clamped to a fixed voltage value, thereby extending the working time of the post-stage power converter without replacing components with higher current resistance.

為了對上述電源裝置100的操作方法做更進一步的闡述，請同時參照第1～3圖，第3圖是依照本發明一實施例之一種電源裝置100的操作方法200的流程圖。於第1、2圖中，電源裝置100包括功率因數校正器110、電壓轉換裝置140以及與電壓轉換裝置140並聯設置於功率因數校正器110的輸出端111的輔助電路120。如第3圖所示，操作方法200包含步驟S201～S203（應瞭解到，在本實施例中所提及的步驟，除特別敘明其順序者外，均可依實際需要調整其前後順序，甚至可同時或部分同時執行）。In order to further illustrate the operation method of the power supply device 100, please refer to FIGS. 1-3 at the same time. FIG. 3 is a flowchart of an operation method 200 of the power supply device 100 according to an embodiment of the present invention. In FIGS. 1 and 2 , the power supply device 100 includes a power factor corrector 110 , a voltage conversion device 140 , and an auxiliary circuit 120 connected to the voltage conversion device 140 in parallel with the output end 111 of the power factor corrector 110 . As shown in FIG. 3, the operation method 200 includes steps S201-S203 (it should be understood that the steps mentioned in this embodiment, unless the sequence is specially stated, can be adjusted according to actual needs. even simultaneously or partially).

於步驟S201，當功率因數校正器110動作時，控制輔助電路120中的切換裝置122於第一切換狀態，使功率因數校正器110的輸出端111透過切換裝置122對輔助電路120中的輔助電容器C1進行充電。In step S201 , when the power factor corrector 110 operates, the switching device 122 in the auxiliary circuit 120 is controlled to be in the first switching state, so that the output terminal 111 of the power factor corrector 110 is connected to the auxiliary capacitor in the auxiliary circuit 120 through the switching device 122 . C1 to charge.

於步驟S202，當功率因數校正器110停止工作未超出預設時間時，將切換裝置122維持於第一切換狀態。此時，功率因數校正器110中的主電容器C2提供電力給並聯於輔助電路120的電壓轉換裝置140。In step S202, when the power factor corrector 110 stops working within the preset time, the switching device 122 is maintained in the first switching state. At this time, the main capacitor C2 in the power factor corrector 110 provides power to the voltage conversion device 140 connected in parallel with the auxiliary circuit 120 .

於步驟S203，當功率因數校正器110停止工作超出預設時間時，將切換裝置122切換至第二切換狀態，使輔助電容器C1分別透過切換裝置122與輔助電路120中的輔助升壓電路121對功率因數校正器110的輸出端111進行穩壓。In step S203, when the power factor corrector 110 stops working for more than a preset time, the switching device 122 is switched to the second switching state, so that the auxiliary capacitor C1 is connected to the auxiliary boosting circuit 121 in the auxiliary circuit 120 through the switching device 122 respectively. The output terminal 111 of the power factor corrector 110 is regulated.

在本發明的一實施例中，步驟S201為正常情況（即，輸入電源162不掉電）的操作方式，當功率因數校正器110動作時，切換裝置122的第一切換狀態為導通第一半導體開關S1並關斷第二半導體開關S2，輔助開關S3處於關斷狀態，使輔助升壓電路121不動作，功率因數校正器110的輸出端111的電壓透過第一半導體開關S1及第二本體二極體D12對輔助電容器C1進行充電。另外，透過第一電感器L2與第二電感器150電感耦合，使倍壓電路152提供輔助電源Vcc給切換裝置122。In an embodiment of the present invention, step S201 is a normal operation mode (ie, the input power supply 162 is not powered off), and when the power factor corrector 110 operates, the first switching state of the switching device 122 is to turn on the first semiconductor The switch S1 turns off the second semiconductor switch S2, the auxiliary switch S3 is turned off, so that the auxiliary booster circuit 121 does not operate, and the voltage of the output end 111 of the power factor corrector 110 passes through the first semiconductor switch S1 and the second body 2 The pole body D12 charges the auxiliary capacitor C1. In addition, through the inductive coupling between the first inductor L2 and the second inductor 150 , the voltage multiplier circuit 152 provides the auxiliary power Vcc to the switching device 122 .

在本發明的一實施例中，步驟S202為輸入電源162喪失未超出預設時間的操作方式，當功率因數校正器110停止工作未超出預設時間時，導通第一半導體開關S1並關斷第二半導體開關S2，輔助開關S3處於關斷狀態，主電容器C2的電壓低於輔助電容器C1的電壓，使第二本體二極體D12為截止狀態，由主電容器C2提供電力給電壓轉換裝置140。In an embodiment of the present invention, step S202 is an operation mode in which the input power supply 162 is lost within a preset time. When the power factor corrector 110 stops working within a preset time, the first semiconductor switch S1 is turned on and the second semiconductor switch S1 is turned off. The two semiconductor switches S2 and the auxiliary switch S3 are in the off state, the voltage of the main capacitor C2 is lower than the voltage of the auxiliary capacitor C1, so that the second body diode D12 is in the off state, and the main capacitor C2 provides power to the voltage conversion device 140.

在本發明的一實施例中，步驟S203為輸入電源162喪失超出預設時間的操作方式，當功率因數校正器110停止工作超出預設時間時，切換裝置122的第二切換狀態為關斷第一半導體開關S1並導通第二半導體開關S2，並控制輔助開關S3交替地導通與關斷，使輔助升壓電路121動作，輔助電容器C1同時也透過第二半導體開關S2及第一本體二極體D11對主電容器C2進行充電，亦透過輔助電感器L1及輔助二極體D1對主電容器進行充電。In an embodiment of the present invention, step S203 is that the input power supply 162 loses the operation mode beyond the preset time. When the power factor corrector 110 stops working for more than the preset time, the second switching state of the switching device 122 is to turn off the second switching state. A semiconductor switch S1 turns on the second semiconductor switch S2, and controls the auxiliary switch S3 to be turned on and off alternately, so that the auxiliary boost circuit 121 operates, and the auxiliary capacitor C1 also passes through the second semiconductor switch S2 and the first body diode. D11 charges the main capacitor C2 and also charges the main capacitor through the auxiliary inductor L1 and the auxiliary diode D1.

雖然本發明之實施方式揭露如上，然其並非用以限定本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the embodiments of the present invention are disclosed as above, they are not intended to limit the present invention. Anyone who is familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention The scope of the patent application attached herewith shall prevail.

為讓本發明之上述和其他目的、特徵、優點與實施例能更明顯易懂，所附符號之說明如下： 100:電源裝置 101:輸出端 102:輸入端 103:接地端 110:功率因數校正器 111:輸出端 112:接地端 120:輔助電路 121:輔助升壓電路 122:切換裝置 125:第一端 126:中間端 127:第二端 130:控制器 140:電壓轉換裝置 141:輸入端 142:負載 143:接地端 150:第二電感器 152:倍壓電路 160:整流器 162:輸入電源 170:光耦合器 C1:輔助電容器 C2:主電容器 D1:輔助二極體 D2:二極體 D11:第一本體二極體 D12:第二本體二極體 L1:輔助電感器 L2:第一電感器 R:限流電阻器 S1:第一半導體開關 S2:第二半導體開關 S3:輔助開關 S4:開關 S5:切換開關 Vcc:輔助電源 Vc3:電壓 Vc4:電壓 200:操作方法 S201～S203:步驟 In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the descriptions of the appended symbols are as follows: 100: Power supply unit 101: output terminal 102: Input terminal 103: Ground terminal 110: Power Factor Corrector 111: output terminal 112: ground terminal 120: Auxiliary circuit 121: Auxiliary boost circuit 122: Switching device 125: First End 126: middle end 127: Second End 130: Controller 140: Voltage conversion device 141: Input terminal 142: load 143: ground terminal 150: Second inductor 152: Voltage Doubler Circuit 160: Rectifier 162: Input power 170: Optocoupler C1: Auxiliary capacitor C2: Main capacitor D1: Auxiliary Diode D2: Diode D11: The first body diode D12: Second body diode L1: Auxiliary Inductor L2: first inductor R: Current limiting resistor S1: first semiconductor switch S2: Second semiconductor switch S3: Auxiliary switch S4: switch S5: toggle switch Vcc: auxiliary power Vc3: Voltage Vc4: Voltage 200: How to operate S201～S203: Steps

為讓本發明之上述和其他目的、特徵、優點與實施例能更明顯易懂，所附圖式之說明如下：第1圖是依照本發明一實施例之一種電源裝置的方塊圖；第2圖是依照本發明一實施例之一種電源裝置的電路圖；以及第3圖是依照本發明一實施例之一種電源裝置的操作方法的流程圖。 In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the accompanying drawings are described as follows: FIG. 1 is a block diagram of a power supply device according to an embodiment of the present invention; FIG. 2 is a circuit diagram of a power supply device according to an embodiment of the present invention; as well as FIG. 3 is a flowchart of an operating method of a power supply device according to an embodiment of the present invention.

100:電源裝置 100: Power supply unit

101:輸出端 101: output terminal

102:輸入端 102: Input terminal

103:接地端 103: Ground terminal

110:功率因數校正器 110: Power Factor Corrector

111:輸出端 111: output terminal

112:接地端 112: ground terminal

120:輔助電路 120: Auxiliary circuit

121:輔助升壓電路 121: Auxiliary boost circuit

122:切換裝置 122: Switching device

125:第一端 125: First End

126:中間端 126: middle end

127:第二端 127: Second End

130:控制器 130: Controller

140:電壓轉換裝置 140: Voltage conversion device

141:輸入端 141: Input terminal

142:負載 142: load

143:接地端 143: ground terminal

C1:輔助電容器 C1: Auxiliary capacitor

Claims

一種電源裝置，包括：一功率因數校正器；一輔助電容器；一切換裝置，具有一第一端、一第二端與一中間端，該第一端電性連接該功率因數校正器的一輸出端，該第二端電性連接該輔助電容器的一端；一輔助升壓電路，具有一輸出端、一輸入端與一接地端，該輔助升壓電路的該輸出端電性連接該功率因數校正器的該輸出端，該輔助升壓電路的該輸入端電性連接該中間端，該接地端電性連接該輔助電容器的另一端；一控制器，電性連接該切換裝置及該輔助升壓電路；以及一電壓轉換裝置，具有一輸入端電性連接該功率因數校正器的該輸出端，該控制器控制該切換裝置與該輔助升壓電路的切換，使該輔助電容器所儲存的電力可透過該切換裝置與該輔助升壓電路對該功率因數校正器的該輸出端進行穩壓。 A power supply device, comprising: a power factor corrector; an auxiliary capacitor; a switching device having a first end, a second end and an intermediate end, the first end is electrically connected to an output end of the power factor corrector, and the second end is electrically connected to one end of the auxiliary capacitor; an auxiliary boost circuit, which has an output terminal, an input terminal and a ground terminal, the output terminal of the auxiliary boost circuit is electrically connected to the output terminal of the power factor corrector, and the input terminal of the auxiliary boost circuit the middle terminal is electrically connected, and the ground terminal is electrically connected to the other end of the auxiliary capacitor; a controller electrically connected to the switching device and the auxiliary boost circuit; and a voltage conversion device having an input terminal electrically connected to the output terminal of the power factor corrector, The controller controls the switching between the switching device and the auxiliary boosting circuit, so that the power stored in the auxiliary capacitor can be regulated at the output end of the power factor corrector through the switching device and the auxiliary boosting circuit.

如請求項1所述之電源裝置，其中該切換裝置包括：一第一半導體開關，其一端電性連接該第一端及該功率因數校正器的該輸出端，而另一端電性連接該中間端及該輔助升壓電路的該輸入端，該第一半導體開關具有一第一本體二極體，該第一本體二極體的一陰極與一陽極分別電性連接該第一半導體開關的該端與該另一端；以及一第二半導體開關，其一端電性連接該第一半導體開關的該另一端、該中間端及該輔助升壓電路的該輸入端，該第二半導體開關的另一端電性連接該第二端及該輔助電容器的該端，該第二半導體開關具有一第二本體二極體，該第二本體二極體的一陽極與一陰極分別電性連接該第二半導體開關的該端與該另一端。 The power supply device of claim 1, wherein the switching device comprises: a first semiconductor switch, one end of which is electrically connected to the first end and the output end of the power factor corrector, and the other end of which is electrically connected to the intermediate end and the input end of the auxiliary boost circuit, the first semiconductor switch The switch has a first body diode, a cathode and an anode of the first body diode are respectively electrically connected to the end and the other end of the first semiconductor switch; and a second semiconductor switch, one end of which is electrically connected to the other end of the first semiconductor switch, the middle end and the input end of the auxiliary boost circuit, and the other end of the second semiconductor switch is electrically connected to the second end and the end of the auxiliary capacitor, the second semiconductor switch has a second body diode, an anode and a cathode of the second body diode are respectively electrically connected to the end of the second semiconductor switch and the other one end.

如請求項2所述之電源裝置，其中該輔助升壓電路包括：一輔助二極體，其一陰極電性連接該輔助升壓電路的該輸出端；一輔助開關，其一端電性連接該輔助二極體的一陽極，該輔助開關的另一端電性連接該輔助升壓電路的該接地端，該輔助開關的一控制端耦接該控制器；以及一輔助電感器，其一端電性連接該輔助二極體的該陽極，而另一端電性連接該輔助升壓電路的該輸入端。 The power supply device of claim 2, wherein the auxiliary boost circuit comprises: an auxiliary diode, a cathode of which is electrically connected to the output end of the auxiliary boost circuit; an auxiliary switch, one end of which is electrically connected to an anode of the auxiliary diode, the other end of the auxiliary switch is electrically connected to the ground terminal of the auxiliary boost circuit, and a control terminal of the auxiliary switch is coupled to the controller; as well as an auxiliary inductor, one end of which is electrically connected to the anode of the auxiliary diode, and the other end of which is electrically connected to the input end of the auxiliary boost circuit.

如請求項3所述之電源裝置，其中當該功率因數校正器動作時該控制器導通該第一半導體開關並關斷該第二半導體開關，且該輔助開關處於關斷狀態。The power supply device of claim 3, wherein when the power factor corrector operates, the controller turns on the first semiconductor switch and turns off the second semiconductor switch, and the auxiliary switch is in an off state.

如請求項4所述之電源裝置，其中該功率因數校正器電性連接一輸入電源，在該輸入電源斷電以後，當該功率因數校正器停止工作未超出一預設時間時，該輔助開關維持該關斷狀態。The power supply device of claim 4, wherein the power factor corrector is electrically connected to an input power supply, and after the input power supply is cut off, when the power factor corrector stops working within a preset time, the auxiliary switch maintain this off state.

如請求項4所述之電源裝置，其中當該功率因數校正器停止工作超出一預設時間時，該控制器關斷該第一半導體開關並導通該第二半導體開關，並控制該輔助開關交替地導通與關斷。The power supply device of claim 4, wherein when the power factor corrector stops working for more than a predetermined time, the controller turns off the first semiconductor switch and turns on the second semiconductor switch, and controls the auxiliary switch alternately ground on and off.

如請求項2所述之電源裝置，更包括：一切換開關，其一端電性連接該第一半導體開關的該另一端，而另一端電性連接該第二半導體開關的一控制端，該切換開關的控制端耦接該第一半導體開關的一控制端及該控制器。 The power supply device as claimed in claim 2, further comprising: a switch, one end of which is electrically connected to the other end of the first semiconductor switch, and the other end is electrically connected to a control terminal of the second semiconductor switch, the control terminal of the switch is coupled to a control terminal of the first semiconductor switch control terminal and the controller.

如請求項3所述之電源裝置，其中該切換裝置更包括：一限流電阻器，電性連接於該第一半導體開關與該功率因數校正器的該輸出端之間。 The power supply device as claimed in claim 3, wherein the switching device further comprises: A current limiting resistor is electrically connected between the first semiconductor switch and the output end of the power factor corrector.

如請求項1所述之電源裝置，其中該功率因數校正器包括：一主電容器，其二端分別電性連接該輔助升壓電路的該輸出端與該接地端；一二極體，其一陰極電性連接該輔助升壓電路的該輸出端；一開關，其二端分別電性連接該二極體的一陽極與該接地端，該開關的一控制端耦接該控制器；以及一第一電感器，其二端分別電性連接該二極體的該陽極與一整流器，該整流器電性連接一輸入電源。 The power supply device of claim 1, wherein the power factor corrector comprises: a main capacitor, the two ends of which are respectively electrically connected to the output end and the ground end of the auxiliary boost circuit; a diode, a cathode of which is electrically connected to the output end of the auxiliary boost circuit; a switch, two terminals of which are electrically connected to an anode of the diode and the ground terminal respectively, and a control terminal of the switch is coupled to the controller; and A first inductor, the two ends of which are respectively electrically connected to the anode of the diode and a rectifier, and the rectifier is electrically connected to an input power source.

如請求項9所述之電源裝置，更包括：一第二電感器，與該第一電感器電感耦合；一倍壓電路，電性連接該第二電感器；以及一光耦合器，電性連接該倍壓電路、該控制器與該切換裝置。 The power supply device as claimed in claim 9, further comprising: a second inductor inductively coupled with the first inductor; A voltage doubling circuit is electrically connected to the second inductor; and An optocoupler is electrically connected to the voltage doubling circuit, the controller and the switching device.

一種電源裝置的操作方法，該電源裝置包括一功率因數校正器、一電壓轉換裝置以及與該電壓轉換裝置並聯設置於該功率因數校正器的一輸出端的一輔助電路，該操作方法包括以下步驟：（A）當該功率因數校正器動作時，控制該輔助電路中的一切換裝置於一第一切換狀態，使該功率因數校正器的該輸出端透過該切換裝置對該輔助電路中的一輔助電容器進行充電；（B）當該功率因數校正器停止工作未超出一預設時間時，將該切換裝置維持於該第一切換狀態；以及（C）當該功率因數校正器停止工作超出該預設時間時，將該切換裝置切換至一第二切換狀態，使該輔助電容器分別透過該切換裝置與該輔助電路中的一輔助升壓電路對該功率因數校正器的該輸出端進行穩壓。 An operation method of a power supply device, the power supply device comprising a power factor corrector, a voltage conversion device, and an auxiliary circuit arranged in parallel with the voltage conversion device at an output end of the power factor corrector, the operation method comprising the following steps: (A) When the power factor corrector operates, control a switching device in the auxiliary circuit to be in a first switching state, so that the output end of the power factor corrector passes through the switching device to an auxiliary circuit in the auxiliary circuit capacitors are charged; (B) maintaining the switching device in the first switching state when the power factor corrector stops working within a predetermined time period; and (C) when the power factor corrector stops working for more than the preset time, switch the switching device to a second switching state, so that the auxiliary capacitor passes through the switching device and an auxiliary booster circuit in the auxiliary circuit respectively The output of the power factor corrector is regulated.

如請求項11所述之操作方法，其中該輔助升壓電路包括一輔助二極體、一輔助開關以及一輔助電感器，該輔助二極體的一陰極電性連接該功率因數校正器的該輸出端，該輔助開關的一端電性連接該輔助二極體的一陽極，該輔助開關的另一端電性連接一接地端，該輔助電感器的一端電性連接該輔助開關的該端。The operation method of claim 11, wherein the auxiliary boost circuit comprises an auxiliary diode, an auxiliary switch and an auxiliary inductor, and a cathode of the auxiliary diode is electrically connected to the power factor corrector of the power factor corrector. An output end, one end of the auxiliary switch is electrically connected to an anode of the auxiliary diode, the other end of the auxiliary switch is electrically connected to a ground terminal, and one end of the auxiliary inductor is electrically connected to the end of the auxiliary switch.

如請求項12所述之操作方法，其中該切換裝置包括一第一半導體開關以及一第二半導體開關，該第一半導體開關的一端電性連接該功率因數校正器的該輸出端，該第一半導體開關的另一端電性連接該輔助電感器的另一端，該第二半導體開關的一端電性連接該第一半導體開關的該另一端，該第二半導體開關的另一端電性連接該輔助電容器的該端，該第一半導體開關具有一第一本體二極體，該第一本體二極體的一陰極與一陽極分別電性連接該第一半導體開關的該端與該另一端，該第二半導體開關具有一第二本體二極體，該第二本體二極體的一陽極與一陰極分別電性連接該第二半導體開關的該端與該另一端。The operation method of claim 12, wherein the switching device comprises a first semiconductor switch and a second semiconductor switch, one end of the first semiconductor switch is electrically connected to the output end of the power factor corrector, and the first semiconductor switch is electrically connected to the output end of the power factor corrector. The other end of the semiconductor switch is electrically connected to the other end of the auxiliary inductor, one end of the second semiconductor switch is electrically connected to the other end of the first semiconductor switch, and the other end of the second semiconductor switch is electrically connected to the auxiliary capacitor the end of the first semiconductor switch, the first semiconductor switch has a first body diode, a cathode and an anode of the first body diode are respectively electrically connected to the end and the other end of the first semiconductor switch, the first body diode The two semiconductor switches have a second body diode, and an anode and a cathode of the second body diode are respectively electrically connected to the end and the other end of the second semiconductor switch.

如請求項13所述之操作方法，其中步驟（A）包括：當該功率因數校正器動作時，該切換裝置的該第一切換狀態為導通該第一半導體開關並關斷該第二半導體開關，該輔助開關處於關斷狀態，使該輔助升壓電路不動作。 The method of operation as claimed in claim 13, wherein step (A) comprises: When the power factor corrector operates, the first switching state of the switching device is to turn on the first semiconductor switch and turn off the second semiconductor switch, and the auxiliary switch is in an off state, so that the auxiliary boost circuit does not operate .

如請求項13所述之操作方法，其中步驟（B）包括：當該功率因數校正器停止工作未超出該預設時間時，導通該第一半導體開關並關斷該第二半導體開關，該輔助開關處於關斷狀態。 The method of operation as claimed in claim 13, wherein step (B) comprises: When the power factor corrector stops working within the preset time, the first semiconductor switch is turned on and the second semiconductor switch is turned off, and the auxiliary switch is in an off state.

如請求項13所述之操作方法，其中步驟（C）包括：當該功率因數校正器停止工作超出該預設時間時，該切換裝置的該第二切換狀態為關斷該第一半導體開關並導通該第二半導體開關，並控制該輔助開關交替地導通與關斷，使該輔助升壓電路動作。 The operation method of claim 13, wherein step (C) comprises: When the power factor corrector stops working beyond the preset time, the second switching state of the switching device is to turn off the first semiconductor switch and turn on the second semiconductor switch, and control the auxiliary switch to turn on and off alternately off to make the auxiliary booster circuit operate.

如請求項11所述之操作方法，其中該電源裝置包括與該功率因數校正器中的一第一電感器電感耦合的一第二電感器，該第二電感器電性連接一倍壓電路，透過該第一、第二電感器電感耦合，使該倍壓電路提供一輔助電源給該切換裝置。The operation method of claim 11, wherein the power supply device includes a second inductor inductively coupled with a first inductor in the power factor corrector, the second inductor is electrically connected to a voltage doubling circuit , through the inductive coupling of the first and second inductors, the voltage doubling circuit provides an auxiliary power supply to the switching device.