TWI476578B - Power supply apparatus and switching method therefor - Google Patents
Power supply apparatus and switching method therefor Download PDFInfo
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Description
一種電源供應裝置及其切換方法，特別關於一種可切換不 同供應電源且具放電功能之電源供應裝置及其切換方法。Power supply device and switching method thereof, in particular, a switchable A power supply device with a power supply and a discharge function and a switching method thereof.
在常見之可自動切換電源配置的電源供應裝置中，此電源供應裝置的一次側大都是以兩組交流電源來選擇切換，其中一組為一般常見之市電交流電源，另一組則是由備源的交流發電機來提供交流電源。一般電源供應裝置在正常運作時，都是選擇市電為裝置運作之預設電源，而當市電供應中斷時，此電源供應裝置中的控制電路會切換由發電機之交流電源來提供電源供應裝置運作所需電力。In the common power supply device that can automatically switch the power configuration, the primary side of the power supply device is mostly switched by two sets of AC power sources, one of which is a common common commercial AC power source, and the other is a standby device. The source of the alternator provides AC power. Generally, when the power supply device is in normal operation, the power supply is selected as the preset power supply for the operation of the device, and when the commercial power supply is interrupted, the control circuit in the power supply device switches the AC power supply of the generator to provide the power supply device operation. Required power.
而此方法在當市電中斷後，電源供應裝置便將電源的供應來源由市電電源切換至發電機電源，轉由發電機來提供電源供應裝置運作所需電源。但此方法之缺點為當電源供應裝置由市電切換至發電機供電過程中，發電機從啟動到穩定正常供電的時間需要數十秒，這會造成電源供應裝置的供電短暫中斷。In this method, after the mains supply is interrupted, the power supply device switches the supply source of the power source from the mains power source to the generator power source, and the generator supplies the power required for the operation of the power supply device. However, the disadvantage of this method is that when the power supply device is switched from the mains to the generator, the time from the start of the generator to the stable normal power supply takes several tens of seconds, which causes the power supply of the power supply device to be temporarily interrupted.
因此，使用此方法設計之電源供應裝置則必須在負載端增加直流的備援裝置(例如一電池)或不斷電系統設備來穩定電源，但此方法所需費用較高，而且備援系統會占用較大的空間，整體系統的效率也較低。Therefore, the power supply device designed by this method must add a DC backup device (such as a battery) or an uninterruptible power system device to stabilize the power supply at the load end, but this method requires a higher cost, and the backup system will Taking up a large space, the overall system is also less efficient.
本發明可以提供一種電源供應裝置及其切換方法，解決在切換兩供電來源時會造成供電暫時中斷的問題。The invention can provide a power supply device and a switching method thereof, and solve the problem that the power supply is temporarily interrupted when the two power sources are switched.
本發明提出一種電源供應裝置，包括供電單元、切換單元、放電單元以及控制單元。供電單元用以接收第一電源或第二電源，用以輸出第三電源。切換單元耦接供電單元，用以接收第一電源以及第二電源，以選擇輸出第一電源或第二電源至供電單元。放電單元耦接供電單元，用以依據控制訊號，以對供電單元進行放電。控制單元耦接切換單元與放電單元用以當判斷出第一電源之電壓是否小於第一電壓，控制單元控制切換單元，以停止輸出第一電源至供電單元，且控制單元產生控制訊號，使放電單元將供電單元進行放電，以降低供電單元之電壓，而控制單元控制切換單元，以輸出第二電源至供電單元。The invention provides a power supply device comprising a power supply unit, a switching unit, a discharge unit and a control unit. The power supply unit is configured to receive the first power source or the second power source to output the third power source. The switching unit is coupled to the power supply unit for receiving the first power source and the second power source to selectively output the first power source or the second power source to the power supply unit. The discharge unit is coupled to the power supply unit for discharging the power supply unit according to the control signal. The control unit is coupled to the switching unit and the discharge unit for determining whether the voltage of the first power source is less than the first voltage, the control unit controls the switching unit to stop outputting the first power source to the power supply unit, and the control unit generates a control signal to discharge The unit discharges the power supply unit to reduce the voltage of the power supply unit, and the control unit controls the switching unit to output the second power supply to the power supply unit.
在一實施例中，前述當判斷第一電源之電壓大於或等於第一電壓時，控制單元控制切換單元，以將第一電源輸出至供電單元。In an embodiment, when it is determined that the voltage of the first power source is greater than or equal to the first voltage, the control unit controls the switching unit to output the first power source to the power supply unit.
在一實施例中，前述切換單元包括第一切換單元以及第二切換單元。第一切換單元耦接供電單元，用以控制第一電源是否輸出至供電單元。第二切換單元耦接供電單元，用以控制第二電源是否輸出至供電單元。In an embodiment, the foregoing switching unit includes a first switching unit and a second switching unit. The first switching unit is coupled to the power supply unit for controlling whether the first power source is output to the power supply unit. The second switching unit is coupled to the power supply unit for controlling whether the second power source is output to the power supply unit.
在一實施例中，前述電源供應裝置更包括蓄電單元。蓄電單元耦接供電單元，用以穩定供電單元之電壓。In an embodiment, the foregoing power supply device further includes a power storage unit. The power storage unit is coupled to the power supply unit for stabilizing the voltage of the power supply unit.
在一實施例中，前述第一電源為交流電源，第二電源為直流電源。In an embodiment, the first power source is an alternating current power source, and the second power source is a direct current power source.
本發明之一種電源供應裝置之切換方法，包括下列步驟。 輸出第一電源至供電單元。判斷第一電源之電壓是否小於第一電壓。當判斷第一電源之電壓小於第一電壓時，停止輸出第一電源至供電單元。執行放電程序。輸出第二電源至供電單元。A method for switching a power supply device of the present invention includes the following steps. The first power source is output to the power supply unit. It is determined whether the voltage of the first power source is less than the first voltage. When it is determined that the voltage of the first power source is less than the first voltage, the output of the first power source to the power supply unit is stopped. Perform the discharge procedure. The second power source is output to the power supply unit.
在一實施例中，當判斷第一電源之電壓大於或等於第一電壓時，輸出第一電源至供電單元。In an embodiment, when it is determined that the voltage of the first power source is greater than or equal to the first voltage, the first power source is output to the power supply unit.
在一實施例中，前述放電程序之步驟包括下列步驟。執行一放電，以降低供電單元之電壓。判斷供電單元之電壓是否小於第二電壓。當判斷供電單元之電壓小於第二電壓時，停止執行放電。當判斷供電單元之電壓大於或等於第二電壓時，輸出第二電源至供電單元。In one embodiment, the steps of the foregoing discharge procedure include the following steps. A discharge is performed to lower the voltage of the power supply unit. Determine whether the voltage of the power supply unit is less than the second voltage. When it is judged that the voltage of the power supply unit is less than the second voltage, the discharge is stopped. When it is determined that the voltage of the power supply unit is greater than or equal to the second voltage, the second power source is output to the power supply unit.
在一實施例中，前述輸出第二電源至供電單元之步驟之後更包括下列步驟。判斷第一電源之電壓是否大於第三電壓。當第一電源之電壓大於第三電壓時，停止輸出第二電源至供電單元。當第一電源之電壓小於或等於第三電壓時，輸出第二電源至供電單元。In an embodiment, the step of outputting the second power source to the power supply unit further includes the following steps. It is determined whether the voltage of the first power source is greater than the third voltage. When the voltage of the first power source is greater than the third voltage, the outputting of the second power source to the power supply unit is stopped. When the voltage of the first power source is less than or equal to the third voltage, the second power source is output to the power supply unit.
在一實施例中，前述停止輸出第二電源至供電單元之步驟之後更包括下列步驟。輸出第一電源至供電單元。In an embodiment, the step of stopping outputting the second power source to the power supply unit further includes the following steps. The first power source is output to the power supply unit.
本發明所提供之電源供應裝置及其切換方法，藉由當判斷在供應至供電單元之第一電源中斷時，執行一放電程序，再切換輸出第二電源至供電單元。如此一來，可以解決在切換兩供電來源時會造成供電暫時中斷的問題，同時可以節省設備建置成本，提高整體系統運作效率。The power supply device and the switching method thereof are provided by the present invention, and when it is determined that the first power supply to the power supply unit is interrupted, a discharge program is executed, and then the second power supply is switched to the power supply unit. In this way, the problem that the power supply is temporarily interrupted when switching the two power supply sources can be solved, and the equipment construction cost can be saved, and the overall system operation efficiency can be improved.
雖然本發明以前述之實施例揭露如上，然其並非用以限定本發明。在不脫離本發明之精神和範圍內，所為之更動與潤飾，均屬本發明之專利保護範圍。關於本發明所界定之保護範圍請參考所附之申請專利 範圍。Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention. range.
100‧‧‧電源供應裝置100‧‧‧Power supply unit
110‧‧‧切換單元110‧‧‧Switch unit
112‧‧‧第一切換單元112‧‧‧First switching unit
114‧‧‧第二切換單元114‧‧‧Second switching unit
120‧‧‧控制單元120‧‧‧Control unit
130‧‧‧放電單元130‧‧‧discharge unit
140‧‧‧供電單元140‧‧‧Power supply unit
150‧‧‧蓄電單元150‧‧‧Power storage unit
160‧‧‧第一電源160‧‧‧First power supply
170‧‧‧第二電源170‧‧‧second power supply
180‧‧‧負載180‧‧‧load
第1圖為本發明之電源供應裝置的示意圖。Figure 1 is a schematic view of a power supply device of the present invention.
第2圖為本發明電源供應裝置之切換方法的流程圖。2 is a flow chart of a method for switching a power supply device of the present invention.
第3圖為第2圖之步驟S240的詳細流程圖。Fig. 3 is a detailed flowchart of step S240 of Fig. 2.
第4圖為本發明之電源供應裝置之切換方法之另一流程圖。Fig. 4 is another flow chart of the switching method of the power supply device of the present invention.
以下在實施方式中詳細敘述本發明之詳細特徵以及優點，其內容足以使任何熟習相關技藝者了解本發明之技術內容並據以實施，且根據本說明書所揭露之內容、申請專利範圍及圖式，任何熟習相關技藝者可輕易地理解本發明相關之目的及優點。The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art.
請參照「第1圖」其為依據本發明之電源供應裝置的示意圖。電源供應裝置100包括切換單元110、控制單元120、放電單元130以及供電單元140。切換單元110用以接收第一電源160以及第二電源170，以選擇輸出第一電源160或第二電源170。供電單元140耦接切換單元110，用以接收切換單元110所輸出之第一電源160或第二電源170。並且，供電單元140可以將所接收的第一電源160或第二電源170轉換輸出為第三電源，並將第三電源輸出至負載180，以供負載180使用。Please refer to "FIG. 1" which is a schematic diagram of a power supply device according to the present invention. The power supply device 100 includes a switching unit 110, a control unit 120, a discharge unit 130, and a power supply unit 140. The switching unit 110 is configured to receive the first power source 160 and the second power source 170 to selectively output the first power source 160 or the second power source 170. The power supply unit 140 is coupled to the switching unit 110 for receiving the first power source 160 or the second power source 170 output by the switching unit 110. Moreover, the power supply unit 140 may convert and output the received first power source 160 or the second power source 170 into a third power source, and output the third power source to the load 180 for use by the load 180.
在本實施例中，切換單元110還包括第一切換單元112以及第二切換單元114。第一切換單元112耦接供電單元140，並受控於控制單元120，以控制第一電源160是否輸出至供電單元140。第二切換單元114 耦接供電單元140，並受控於控制單元120，以控制第二電源170是否輸出至供電單元140。放電單元130耦接供電單元140，用以依據控制訊號，以對供電單元140進行一放電。In this embodiment, the switching unit 110 further includes a first switching unit 112 and a second switching unit 114. The first switching unit 112 is coupled to the power supply unit 140 and controlled by the control unit 120 to control whether the first power source 160 is output to the power supply unit 140. Second switching unit 114 The power supply unit 140 is coupled to and controlled by the control unit 120 to control whether the second power source 170 is output to the power supply unit 140. The discharge unit 130 is coupled to the power supply unit 140 for performing a discharge on the power supply unit 140 according to the control signal.
控制單元120耦接切換單元110與放電單元130，用以當判斷出第一電源160之電壓是否小於第一電壓，控制單元120控制切換單元110，以停止輸出第一電源160至供電單元140，且控制單元120產生控制訊號，使放電單元130對供電單元140進行放電，以降低供電單元140之電壓，而控制單元120控制切換單元110，以輸出第二電源170至供電單元140。The control unit 120 is coupled to the switching unit 110 and the discharge unit 130 for determining whether the voltage of the first power source 160 is less than the first voltage, and the control unit 120 controls the switching unit 110 to stop outputting the first power source 160 to the power supply unit 140. The control unit 120 generates a control signal to cause the discharge unit 130 to discharge the power supply unit 140 to reduce the voltage of the power supply unit 140, and the control unit 120 controls the switching unit 110 to output the second power source 170 to the power supply unit 140.
首先，當第一電源160正常輸出時，控制單元120會控制切換單元110，以選擇第一電源160輸出至供電單元140。據此，供電單元140則依據第一電源160，而產生對應第一電源160的第三電源給負載180。接著，控制單元120會判斷第一電源160的供電狀態，亦即判斷第一電源160是否小於第一電壓。First, when the first power source 160 is normally output, the control unit 120 controls the switching unit 110 to select the first power source 160 to output to the power supply unit 140. Accordingly, the power supply unit 140 generates a third power source corresponding to the first power source 160 to the load 180 according to the first power source 160. Next, the control unit 120 determines the power supply state of the first power source 160, that is, determines whether the first power source 160 is smaller than the first voltage.
當判斷出第一電源160之電壓小於第一電壓(例如第一電源160之供應被中斷)時，控制單元120會控制切換單元110，以停止輸出第一電源160至供電單元140。也就是說，控制單元120控制切換單元110的第一切換單元112，以停止輸出第一電源160至供電單元140，亦即斷開第一電源160與供電單元140之間的連接。When it is determined that the voltage of the first power source 160 is less than the first voltage (for example, the supply of the first power source 160 is interrupted), the control unit 120 controls the switching unit 110 to stop outputting the first power source 160 to the power supply unit 140. That is, the control unit 120 controls the first switching unit 112 of the switching unit 110 to stop outputting the first power source 160 to the power supply unit 140, that is, disconnecting the first power source 160 from the power supply unit 140.
接著，控制單元120控制放電單元130，以對供電單元140進行放電，進而降低供電單元140之電壓。在本實施例中，第一電源160例如為一交流電源或一市電。放電單元130例如為一電阻器或一耗能元件，但並不以此為限。Next, the control unit 120 controls the discharge unit 130 to discharge the power supply unit 140, thereby reducing the voltage of the power supply unit 140. In this embodiment, the first power source 160 is, for example, an AC power source or a commercial power source. The discharge unit 130 is, for example, a resistor or an energy consuming component, but is not limited thereto.
之後，當供電單元140之電壓降低至一預設準位時，控制單元120會控制切換單元110，以選擇第二電源170輸出至供電單元140。據此，供電單元140會依據第二電源170，而產生對應第二電源170的第三電源給負載180。而在本實施例中，第二電源170例如為一直流電源。負載180例如為一伺服器，但並不以此為限。Thereafter, when the voltage of the power supply unit 140 is lowered to a predetermined level, the control unit 120 controls the switching unit 110 to select the second power source 170 to output to the power supply unit 140. Accordingly, the power supply unit 140 generates a third power source corresponding to the second power source 170 to the load 180 according to the second power source 170. In the present embodiment, the second power source 170 is, for example, a DC power source. The load 180 is, for example, a server, but is not limited thereto.
另外，本實施例之電源供應裝置100還包括蓄電單元150，此蓄電單元150耦接供電單元140與負載180之間，用以穩定供電單元140與負載180間的電壓。其中，蓄電單元150例如為電池、電容器或蓄電元件。In addition, the power supply device 100 of the present embodiment further includes a power storage unit 150 coupled between the power supply unit 140 and the load 180 for stabilizing the voltage between the power supply unit 140 and the load 180. The power storage unit 150 is, for example, a battery, a capacitor, or a storage element.
請參照「第2圖」，其為本發明之電源供應裝置之切換方法的流程示意圖。前述實施例之電源供應裝置100可執行此切換方法。首先，控制單元120致能第一切換單元112，以輸出第一電源160至供電單元140(步驟210)。接著，控制單元120會判斷第一電源160之電壓是否小於第一電壓(步驟220)。Please refer to FIG. 2, which is a schematic flow chart of a method for switching a power supply device according to the present invention. The power supply device 100 of the foregoing embodiment can perform this switching method. First, the control unit 120 enables the first switching unit 112 to output the first power source 160 to the power supply unit 140 (step 210). Next, the control unit 120 determines whether the voltage of the first power source 160 is less than the first voltage (step 220).
當判斷第一電源160之電壓小於第一電壓時，控制單元120會控制第一切換單元112，以停止輸出第一電源160至供電單元140(步驟230)。也就是說，控制單元120會禁能第一切換單元112，以斷開第一電源160與供電單元140之的連接，使得切換單元110不會輸出第一電源160。由於第一電源160與供電單元140之間的連接斷開後，供電單元140仍然暫時存在著與第一電源160相近之電壓，控制單元120控制放電單元130運作，以執行一放電程序(步驟240)。When it is determined that the voltage of the first power source 160 is less than the first voltage, the control unit 120 controls the first switching unit 112 to stop outputting the first power source 160 to the power supply unit 140 (step 230). That is, the control unit 120 disables the first switching unit 112 to disconnect the first power source 160 from the power supply unit 140 such that the switching unit 110 does not output the first power source 160. After the connection between the first power source 160 and the power supply unit 140 is disconnected, the power supply unit 140 still temporarily has a voltage close to the first power source 160, and the control unit 120 controls the discharge unit 130 to operate to perform a discharge process (step 240). ).
之後，控制單元120致能第二切換單元114，以輸出第二電源170至供電單元140(步驟250)。承接上述步驟S220，當判斷第一電源160 之電壓大於或等於第一電壓時，回到步驟S210，控制單元120持續致能第一切換單元112，以輸出第一電源160至供電單元140。Thereafter, the control unit 120 enables the second switching unit 114 to output the second power source 170 to the power supply unit 140 (step 250). Receiving the above step S220, when determining the first power source 160 When the voltage is greater than or equal to the first voltage, the process returns to step S210, and the control unit 120 continues to enable the first switching unit 112 to output the first power source 160 to the power supply unit 140.
請繼續參照「第3圖」，其為「第2圖」之步驟S240的詳細流程圖。控制單元120控制放電單元130，以執行放電操作，進而降低供電單元140之電壓(步驟310)。接著，控制單元120會判斷供電單元140之電壓是否小於第二電壓(步驟320)。Please continue to refer to "FIG. 3", which is a detailed flowchart of step S240 of "FIG. 2". The control unit 120 controls the discharge unit 130 to perform a discharge operation, thereby reducing the voltage of the power supply unit 140 (step 310). Next, the control unit 120 determines whether the voltage of the power supply unit 140 is less than the second voltage (step 320).
當判斷供電單元140之電壓小於第二電壓時，控制單元120控制放電單元130，以停止放電(步驟330)。承接上述步驟S320，當判斷供電單元140之電壓大於或等於第二電壓時，表示供電單元140之暫存電壓還未降低至第二電壓，則回到步驟S310，控制單元120仍會控制放電單元130，以持續進行放電操作。When it is judged that the voltage of the power supply unit 140 is less than the second voltage, the control unit 120 controls the discharge unit 130 to stop the discharge (step 330). In step S320, when it is determined that the voltage of the power supply unit 140 is greater than or equal to the second voltage, indicating that the temporary storage voltage of the power supply unit 140 has not decreased to the second voltage, the process returns to step S310, and the control unit 120 still controls the discharge unit. 130 to continue the discharge operation.
請參照「第4圖」，其為本發明之電源供應裝置之切換方法之另一流程圖。首先，控制單元120致能第一切換單元112，以輸出第一電源160至供電單元140(步驟410)。接著，控制單元120判斷第一電源160之電壓是否小於第一電壓(步驟420)。當判斷第一電源160之電壓大於或等於第一電壓時，回到步驟S410，控制單元120持續致能第一切換單元112，以輸出第一電源160至供電單元140。Please refer to FIG. 4, which is another flow chart of the switching method of the power supply device of the present invention. First, the control unit 120 enables the first switching unit 112 to output the first power source 160 to the power supply unit 140 (step 410). Next, the control unit 120 determines whether the voltage of the first power source 160 is less than the first voltage (step 420). When it is determined that the voltage of the first power source 160 is greater than or equal to the first voltage, the process returns to step S410, and the control unit 120 continues to enable the first switching unit 112 to output the first power source 160 to the power supply unit 140.
另一方面，當判斷第一電源160之電壓小於第一電壓時，控制單元120會控制第一切換單元112，以停止輸出第一電源160至供電單元140(步驟430)。接著，控制單元120控制放電單元130，以執行放電程序(步驟440)。之後，控制單元120致能第二切換單元114，以輸出第二電源170至供電單元140(步驟450)。On the other hand, when it is determined that the voltage of the first power source 160 is less than the first voltage, the control unit 120 controls the first switching unit 112 to stop outputting the first power source 160 to the power supply unit 140 (step 430). Next, the control unit 120 controls the discharge unit 130 to perform a discharge process (step 440). Thereafter, the control unit 120 enables the second switching unit 114 to output the second power source 170 to the power supply unit 140 (step 450).
接著，控制單元120會進一步判斷第一電源160之電壓是否大於第三電壓(步驟S460)。當第一電源160之電壓小於或等於第三電壓時，表示第一電源160尚未回復正常，則回到步驟S450，控制單元120仍致能第二切換單元114，以持續輸出第二電源160輸出致供電單元140。Next, the control unit 120 further determines whether the voltage of the first power source 160 is greater than the third voltage (step S460). When the voltage of the first power source 160 is less than or equal to the third voltage, indicating that the first power source 160 has not returned to normal, then returning to step S450, the control unit 120 still enables the second switching unit 114 to continuously output the second power source 160 output. To the power supply unit 140.
另一方面，當判斷第一電源160之電壓大於第三電壓時，控制單元120禁能第二切換單元114，以停止輸出第二電源170至供電單元140(步驟S470)。之後，例如可再回到步驟S410，控制單元120再次致能第一切換單元112，以選擇輸出第一電源160至供電單元140。On the other hand, when it is judged that the voltage of the first power source 160 is greater than the third voltage, the control unit 120 disables the second switching unit 114 to stop outputting the second power source 170 to the power supply unit 140 (step S470). Thereafter, for example, returning to step S410, the control unit 120 enables the first switching unit 112 again to selectively output the first power source 160 to the power supply unit 140.
本發明之實施例所揭露之電源供應裝置及其切換方法，藉當判斷在供應至供電單元之第一電源中斷時，執行一放電程序，再切換輸出第二電源至供電單元。如此一來，可以解決在切換兩供電來源時會造成供電暫時中斷的問題，同時可以節省設備建置成本，提高整體系統運作效率。The power supply device and the switching method thereof are disclosed in the embodiment of the present invention, and when it is determined that the first power supply to the power supply unit is interrupted, a discharge program is executed, and then the second power supply is switched to the power supply unit. In this way, the problem that the power supply is temporarily interrupted when switching the two power supply sources can be solved, and the equipment construction cost can be saved, and the overall system operation efficiency can be improved.
100‧‧‧電源供應裝置100‧‧‧Power supply unit
110‧‧‧切換單元110‧‧‧Switch unit
112‧‧‧第一切換單元112‧‧‧First switching unit
114‧‧‧第二切換單元114‧‧‧Second switching unit
120‧‧‧控制單元120‧‧‧Control unit
130‧‧‧放電單元130‧‧‧discharge unit
140‧‧‧供電單元140‧‧‧Power supply unit
150‧‧‧蓄電單元150‧‧‧Power storage unit
160‧‧‧第一電源160‧‧‧First power supply
170‧‧‧第二電源170‧‧‧second power supply
180‧‧‧負載180‧‧‧load
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