200425624 (1 0 )交流輸入電源 (20)AC/DC轉換單元 ^ ( 2 1 )全橋整流器 (30)DC/AC轉換單元 (4 0 )負載 Q 1、Q 2切換開關 Q 3〜Q 6開關晶體 C 1匯流排電容（B U S電容） C 2輸出電容 L 1電感 L 2輸出電感 柒、本案若有化學式時，請揭示最能顯示發明特徵的化學 式： 捌'聲明事項 玖、發明說明 【發明所屬之技術領域】 本發明係關於一種非隔離式交流電源裝置，尤指一種 可應用於頻率變動較快之交流電源輸入，當交流電源輸入 其頻率變動較快時，在裝置遇到交流輸入電壓和交流輸出 電壓電位處於不同正負電位區間時，操作於一馳返模式 (Flyback mode)以解決交流電源輸入與交流輸出電壓兩者 不同相位之非隔離單BUS式之電源裝置。 【先前技術】 200425624 在傳統UPS系統中，依據電源裝置有無採用隔離變壓 器（isolated transformer)，可概略將UPS區分為隔離式與 非隔離式兩款，因為當輸入市電經變頻器（inverter)轉換 電源供給予負載時，法規要求該變頻器（inverter)輸出之 中性線（Neutral)必須保持輸入市電其中性線的特性，即可 避免受電擊（Electric Shock)的危險。也就是中性線對地 線（ground)的電壓必須低於規定的危險電壓。為符合前述 法規要求，通常是將輸入市電之中性線與變頻器 (inverter)輸出之中性線兩者直接連接在一起。對於早期 的單DC voltage bus架構而言，變頻器（inverter)輸出除 非經過一隔離變壓器隔離，否則旁路（bypass)之中性線無 法與變頻器（inverter)輸出·之中性線直接相連接在一起。 但是前述低頻隔離變壓器不僅體積龐大笨重且價袼亦不便 且’甚至對於電源裝置的系統轉換效率更有很大的限制。 故雙 DC voltage bus( Double Conversion)架構的非隔離式 UPS便衍生出來且進而取代之。 明參閱第十一圖至第十三圖所示，在現有的非隔離式 UPS系統中，由於輸入市電中性線係直接連接到輸出端而成 為變頻器（inverter)輸出之中性線，因此採用雙沉 voltage bus ’並以一半橋架構（half bridge )來做為變頻 窃（inverter)之輸出級。由於此種架構具有雙Dc v〇ltage bus ^連接的負載為一非平衡式負載（unbalanced load ) 或電感性負載時’就會造成兩個DC voltage bus之間的電 壓不平衡’而必須採用較多的電容來應付此非平衡式負載 200425624 ’將導致其中_ 使系統工作異常 的要求，若非如此，則當電容容量不夠時 個DC voltage bus上的電壓過高或過低， 而進入保護模式（fault)。 鑑於雙DC V〇Uage bus的上述缺點，採用單 voltage bus架構的UPS便提出來以克服前述缺失，讓葡 於正負半週均使用同-冑DC —age bus，並配合全捋 (full bridge)變頻器（inverte〇做為輸出級。此㈣構; 2克服上述缺失，還可令輸出電感鐵心的損耗祇有以前的 :半’並可使用較低财電屡的電容與半導體開關元件，電 容的個數亦可縮減之。請參閱第十四圖所示，為一習用非 隔離式單DC V0ltage bus架構之卿，惟其缺點是必須维 持變頻器（inverted輸出必須永遠與輸入端的市電同相 位，以維持輸出和輸入之電位正負向永遠相同，否則由於 疋非隔離式，則會造成異常的迴路電流。例如當變頻器 (inverter)輸出為正半週時，開關Q1必須導通以令變頻器 (inverter)能切換出正電壓，如果此時輸入的市電電位不 疋在同向的正電壓，而是負電壓時，則將產生如圖虛線所 不的異常迴路電流現象。同理，當變頻器（inverter)輸出 為負半週時’若市電電位恰為正向時，則亦會有異常的迴 路電流發生的誤動作情形。 口此¥輸入的市電品質不良、頻率變動太快時，前述 木構將會產生問題，尤其當輸入的交流電源來源是來自於 市售的叙電械（generat〇r)時，因發電機（generat〇r)的頻 率變動極快’更需藉由UPS系、统淨化輸入電源，則前述架 構顯然無法達到這項要求。 士在長日$間—電的情況下，需要报長的ups電池供電 二如果只以增加電池個數來解決，由於電池的成本很 很佔工間’因此通常使用者會要求UPS也能夠使用發 ㈣人H讀在長時間停電時，也能以發電機 克服長時間停電，並經由UPS提供—個純淨的電源。因此 ，需要-個能夠解決上述缺點的非隔離式單DC voltage bus架構之UPS。 【發明内容】 有鑑於前述習用方式的紗 '的缺點，本發明之主要目的係提 供：種電源裝置及其控制方法，當輸入的交流電源頻率變 動杈大時’仍可確保輸入的交流電源不影響變頻器 (i n v e r t e r)輸出的操作，以解味显舍 F 解决異$迴路電流發生的問題 〇 .為實施前述目的’本發明電源裝置之控制方法係包含 當輸入至該電源裝詈的Φ、、盾私^、命广、 電源輸入電壓相位與該電源 置之輸出電壓相位不同時，於輪 、 Τ瓦輪入電壓和輸出電壓之電 處於不同正負電位區間時’令電源裝置卫作於—驰返 (Flybackmode)，電源輸入的能量係先健存於一電感； 而不直接供應予負載，爾後由該電感釋放能量予一 雷 容，以避免輸入端與輸出端發生異常迴路，· “ 又’於輸入電壓和輸出電壓之電位處於相同正 區間時’令電源裝置工作於—升壓模式（B〇〇s“_)， 200425624 讓電感只需貯存升麼所需的能量，再由該電感釋放能量提 升娜電，電凝，以達到系統的高效率運作。 藉由&擇適當的工作模式，即使交流輸入電源品質不 本I月之電源裝置仍可正常操作且無異常迴路電流之 由於UPS系統絕大多數都會對輸入電源做鎖相 p lock)動作’因此UPS的大部分時間都是輸入電壓 和輸出電壓之雷仞# 处於同向之正負電位，所以本發明仍可 要#作於升壓_ 4 (BQQSt )以獲得較高的工作效 率 〇 【實施方式】 讀、'> 閱第一圖所示，為本發明非隔離單匯流排(single 電源裝置-實施例之架構圖，惟本發明之實施態樣並 偈限於圖中所示電路。第-圖電路中係包含有： -交流/直流轉換單元（2〇)，其輸入端係連接交 々丨L輸入電源（1 Q ); /直交流轉換翠元（3〇) ’係連接前一級交流 =直〜轉換單元（2〇)之輸出，本實施例中係由四 士 6)構成一全橋變頻器，係將直流切換 =机里悲供電予一負載（4 0 )，其中上述全橋變頻器 出係連接有—輪出電感（L2)及-輸出電容（C2 :容=輸入電源（10)之中性線係直接連接至輸出 谷 )’成為輪出端之中性線； 其中前述交流/直流轉換單元（2 0)係包含有一入 橋整流器（2 1 )，哕入许敫沒哭Γ ?^有王 口亥王‘正机裔（2 1 )之兩輸出端各 200425624 連接有一切換開關（Q 1、Q 2 )，於兩開關元件（Q工 、Q2)間連接有一電感（L1)，又該電感（Li)兩 立而係各別連接呈反向設置的二極體（D 1、D 2 )，兩二 極體（D 1、D 2 )復連接有一匯流排電容（C丄）（BUs 電容）’以構成單B U S的架構。 0 而有關前述實施例的動作，根據交流輸入電源（ )的狀況係可操作於下列數種模式： 一 ·驰返模式（Flyback mode) 本發明之馳返模式係應用於當交流輸入電源（丄〇 ) 頻率變動極大時，例如來源為品質較差之發電機，可允許 本發明接受任何頻率快速變動的輸入電源，藉此防止輸入 電壓相位與輸出電壓不同相時所導致的異常迴路電流。 、如第二圖D、Η兩區段所示’當交流輸入電源（丄〇 )為正電位，而輸出卻為負電位時，兩切換開關1 ) 係同步由脈寬調變信號（PWM)控制，當兩切換 :所Ql) (Q2)均同步導通時，其電路動作如第:、 Q㈡：對電感（L1)進行充電動作’·而當切換開關T 上)(Q2)均同步截止後，電路動作如苐五圖所示， ”感（L 1 )上儲存的能量釋放予該匯流排電容（◦ ’再由匯流排電容（c 1 )供應予負载（4 〇卜 另-方面’當交流輸入電源（工〇 ) 出卻為正電位時，如第_Ηβ、ρ…巧員電位，而輪 關… 區段所示，兩切換開 (Q2)同樣採取同步式的脈寬調變㈣㈣ 4256 24 。當兩切換開關（Qi) (Q2)均同步導通時，其 動作如第四圖所示，對電感（L 1)進行充電動作；而奋 切換開關（QU(Q2)均同步截止後，電 ； 五圖所示，由電威（L1W株h 卞如第 電…"（L1)上儲存的能量釋放予該匯流排 1 )，再由匯流排電容（c: 1 )供應予負載（ 二·升壓模式（Boost Mode) 田乂机輸入電源（1 0 )與裝置的輸出電源處於相 正負電位區間時，令雷 、同 ro _ 電源裝置工作於升壓模式，而不以你 用則述的馳返模式，以提高系㈣率。 必使200425624 (1 0) AC input power supply (20) AC / DC conversion unit ^ (2 1) Full-bridge rectifier (30) DC / AC conversion unit (4 0) Load Q 1, Q 2 switch Q 3 ~ Q 6 switch Crystal C 1 Bus capacitance (BUS capacitance) C 2 Output capacitance L 1 Inductance L 2 Output inductance 柒 If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: 捌 'Declaration Items 玖, Description of the invention [Invention belongs [Technical Field] The present invention relates to a non-isolated AC power supply device, and more particularly to an AC power supply input that has a fast frequency change. When the AC power input has a fast frequency change, the device encounters an AC input voltage and When the AC output voltage potential is in different positive and negative potential ranges, it is operated in a flyback mode to solve the non-isolated single BUS type power supply device with different phases between the AC power input and the AC output voltage. [Previous technology] 200425624 In the traditional UPS system, depending on whether an isolated transformer is used in the power supply device, the UPS can be roughly divided into two types: isolated and non-isolated, because when the mains power is input, the power is converted by the inverter. When the load is provided, the regulations require that the inverter output neutral line must maintain the characteristics of the input mains neutral line to avoid the danger of electric shock. That is, the voltage of the neutral to ground must be lower than the specified dangerous voltage. In order to meet the requirements of the aforementioned regulations, the neutral line of the input mains and the neutral line of the inverter output are usually connected directly. For the early single DC voltage bus architecture, unless the inverter output was isolated by an isolation transformer, the bypass neutral line could not be directly connected to the inverter output neutral line. Together. However, the aforementioned low-frequency isolation transformer is not only bulky, bulky, and expensive, but also has a very large limitation on the system conversion efficiency of the power supply device. Therefore, a non-isolated UPS with a dual DC voltage bus (Double Conversion) architecture is derived and then replaced. Refer to Figures 11 to 13 for details. In the existing non-isolated UPS system, the neutral line of the input mains is directly connected to the output terminal and becomes the neutral line of the inverter output. It adopts double sink voltage bus' and uses half bridge as the output stage of inverter. Because this architecture has dual DC bus buses, when the connected load is an unbalanced load (unbalanced load) or an inductive load, 'it will cause a voltage imbalance between the two DC voltage buses'. More capacitors to cope with this unbalanced load 200425624 'will lead to the requirement to make the system work abnormally, if not, then when the capacitor capacity is not enough, the voltage on the DC voltage bus is too high or too low, and enters the protection mode ( fault). In view of the above shortcomings of the dual DC V0Uage bus, a UPS using a single voltage bus architecture was proposed to overcome the aforementioned shortcomings, and let Portugal use the same-胄 DC —age bus for positive and negative half-cycles, and cooperate with the full bridge The inverter (inverte〇 as the output stage. This structure; 2 overcome the above-mentioned shortcomings, but also make the output inductor core loss is only the previous: half 'and can use lower power and repeated capacitors and semiconductor switching elements, capacitors The number can also be reduced. Please refer to the fourteenth figure, which is a good example of a non-isolated single DC V0ltage bus architecture, but its disadvantage is that the inverter must be maintained (inverted output must always be in phase with the mains power at the input, so that Keep the positive and negative potentials of the output and input always the same, otherwise the non-isolated type will cause abnormal loop current. For example, when the inverter output is positive half cycle, the switch Q1 must be turned on to make the inverter (inverter) ) Can switch positive voltage. If the input mains potential is not positive voltage in the same direction but negative voltage, an abnormal loop current phenomenon will be generated as shown by the dotted line. .Similarly, when the inverter output is negative for half a cycle, 'If the mains potential is just positive, there will also be an abnormal operation of abnormal loop current. This is why the input mains quality is poor and the frequency changes. When it is too fast, the aforementioned wooden structure will cause problems, especially when the input AC power source is from a commercially available generator, because the frequency of the generator is extremely fast. It is necessary to purify the input power through the UPS system, so the aforementioned structure obviously cannot meet this requirement. In the case of long-term $ days-electricity, you need to report to the UPS battery for power supply. If you only need to increase the number of batteries to solve Because the cost of the battery is very large, so users usually require the UPS to be able to use the transmitter. When a long-term power failure occurs, the generator can also overcome the long-term power failure, and it is provided by the UPS. Therefore, a non-isolated single DC voltage bus architecture UPS capable of solving the above disadvantages is needed. [Summary of the Invention] In view of the shortcomings of the conventional yarn, the main purpose of the present invention is to provide Supply: a power supply device and a control method thereof, when the input AC power frequency changes greatly, 'it can still ensure that the input AC power does not affect the operation of the inverter output, in order to solve the problem of F. Problem 〇. To implement the foregoing object, the method for controlling the power supply device of the present invention includes when the phase of the input power to the power supply device, 盾, 命, ^, life, and the phase of the input voltage of the power supply are different from the phase of the output voltage of the power supply. When the power of the wheel and T watt wheel's input voltage and output voltage are in different positive and negative potential ranges, the power supply device works in Flyback mode, and the energy input by the power supply is first stored in an inductor; it is not directly supplied to Load, and then release the energy from the inductor to a thunder capacity to avoid abnormal loops between the input and output ends, and "make the power supply device work at-boosting again when the potential of the input voltage and the output voltage are in the same positive interval" Mode (B〇〇s "_), 200425624 allows the inductor to store only the energy required for the liter, and then releases the energy from the inductor to increase the power, coagulation, System to achieve high efficiency operation. By & selecting the appropriate working mode, even if the AC input power quality is not the same, the power supply device can still operate normally and there is no abnormal loop current. Since most UPS systems will phase lock the input power) Therefore, most of the time of the UPS is that the input voltage and output voltage are in the positive and negative potentials in the same direction, so the present invention can still # work in boost_ 4 (BQQSt) to obtain higher working efficiency. Embodiment] Read, "> As shown in the first figure, it is a non-isolated single bus (single power device-embodiment of the present invention), but the implementation of the present invention is not limited to the circuit shown in the figure. The circuit in the figure-contains:-AC / DC conversion unit (20), whose input terminal is connected to AC input L power (1 Q); / DC conversion converter (3〇) 'Before connection First-level AC = output of the direct-to-conversion unit (20). In this embodiment, a full-bridge inverter is composed of four ± 6), which is to switch the DC = power in the machine to a load (40), where the above The full-bridge inverter output is connected with -wheel-out inductor (L2) and- The output capacitor (C2: capacitance = input power (10) neutral line is directly connected to the output valley) 'becomes the neutral line at the output end of the wheel; wherein the aforementioned AC / DC conversion unit (20) contains a bridge rectifier (2 1), I entered Xu Xun and did not cry Γ ^ There are two output terminals 200425624 connected to each of the two output terminals of Wangkouhaiwang's positive machine (2 1), and two switching elements (Q 1 and Q 2) An inductor (L1) is connected between Q and Q2), and the inductor (Li) is two and the two diodes (D1, D2) are connected in opposite directions, and the two diodes (D1, D 2) A bus capacitor (C 丄) (BUs capacitor) 'is connected to form a single BUS structure. 0 The operations of the foregoing embodiments can be operated in the following modes according to the condition of the AC input power (): 1. Flyback mode The flyback mode of the present invention is applied when the AC input power (丄〇) When the frequency changes greatly, for example, the source is a generator of poor quality, the invention can allow any input power whose frequency fluctuates rapidly, thereby preventing abnormal loop current caused when the input voltage phase and output voltage are out of phase. As shown in sections D and Η of the second figure, 'When the AC input power supply (丄 〇) is positive potential and the output is negative potential, the two switching switches 1) are synchronized by the pulse width modulation signal (PWM). Control, when the two switches: all Ql) (Q2) are turned on synchronously, the circuit action is as follows: Q㈡: Charging action for the inductor (L1) '· and when the switch T () (Q2) is turned off simultaneously The circuit operation is as shown in Figure 25. "The energy stored on the sense (L 1) is released to the bus capacitor (◦ 'The bus capacitor (c 1) is then supplied to the load (40 ohms-aspect') when When the AC input power (work 0) output is positive, as shown in the _Ηβ, ρ ... manual potential, and the wheel off ... section, the two switching on (Q2) also adopts synchronous pulse width modulation 调4256 24. When both transfer switches (Qi) (Q2) are turned on synchronously, their actions are as shown in the fourth figure, and the inductor (L 1) is charged; while the changeover switches (QU (Q2) are turned off simultaneously) As shown in the fifth figure, the power stored in D1W (L1W strain h such as the first power ... " (L1) is released to the busbar 1), and then by When the bus capacitor (c: 1) is supplied to the load (2 · Boost Mode) When the input power (1 0) of the field machine and the output power of the device are in the positive and negative potential range, make the thunder and the same ro _ power supply device Work in boost mode instead of the flyback mode described by you, in order to improve the system rate.
)為二閱第二圖A、E兩區段’當交流輸入電源（1 0 〕為正電位’而輪屮介 U _直保持導通狀態，而另一切換開關（ Ql)係 變（P W Μ )作妒拆岳丨^ 、 糸以脈寬調 蚌i ^ 其中若切換開關（Q 2 )呈導、s 止德，1 φ第二圖所示；若切換開關（Q 2 )恭 r n c/、^路#係如第六®1所示，此刻應保持Η關曰， (Q3)為斷開狀態，以避免異常迴路電流。“曰體 相二：交流輪入電源〇 〇)與裝置的輸出電'… =負電位區間時（如第二圖c 電， 置亦同樣工作於升壓艏β 权），電源裝 、幵κ槟式，惟此時是切換開關（Ω Q、 保持導通狀態，而另—切換開闕（Q1) J 值 p W Μ )信號控制， ,、、寬凋變（ 甘命★ ”中當切換開關（Q 1 )呈 其電流路徑係如第 呈導通時， ，其笔流路徑係如第七圖所示）戴止後 m 1乐待開關晶體（ 200425624 Q 4 )為斷開，以避免異常迴路電流。 惟無論是於正、負電位區間，均是令電感（L丄）儲 存升壓所需的能量，再由該電感（L i ) #放能量以提升 匯流排電容（C 1 )電壓，以達到高效率運作。 清簽閱第八、九圖所示，本發明之具體實施架構並非 僅侷限於前述實施例的態樣，亦可將電路如圖所示加以適 辑钇改仁仍疋以馳返模式（f iyback mode )之設計精神來 解決輸入市電與輸出電壓兩者不同相所造成的問題。 所示，即成為-不斷電電源系統（ups)，該電池備源 電路（60) &市電正常狀況之下可儲備能量，一旦市電 中斷或發生異常時，將轉由該電池備源電路供應予負載。 另一方面，前述各實施例的電路係可直接接收市電而 提：-高品質的潔淨電源予負載，故可視為為一種市電穩 壓裔。然而，若是基於前述市電穩壓器架 外加上-組電池備源電路（60)(如第十A〜十二)員 ’不、上所述’本發明之供電技術，對於輸入市電品質不 穩、頻率變化快料，能m返模式（Fiyback _e )避免市電與輸出電壓因不同相所導致的異常迴路問題； 再者質車父佳的市電輸人’亦可選用升壓模式（) Is the second section A and E of the second picture, “When the AC input power (1 0) is positive potential”, the wheel 屮 U _ is kept on, and the other switch (Ql) is changed (PW Μ ) Make jealousy ^ ^, 脉 with pulse width modulation m ^ Among them, if the switch (Q 2) is guided, s only, 1 φ as shown in the second picture; if the switch (Q 2) is respected rnc /, ^ 路 # is as shown in the sixth ®1. At this moment, it is necessary to keep Tongguan, (Q3) is off to avoid abnormal loop current. "Body phase 2: AC wheel power supply 〇) and the output of the device When the electricity '... = negative potential interval (as shown in the second figure c), the power supply also works at the step-up 艏 β weight, the power supply is installed, and the 槟 κBin type is used, but at this time it is a switch (Ω Q, keep on state, And the other—switching switch (Q1) J value p W Μ) signal control, when the switch (Q 1) shows its current path as in the first, when the switch (Q 1) is turned on, The pen flow path is shown in the seventh figure. After wearing, the m 1 switch to be turned on (200425624 Q 4) is turned off to avoid abnormal loop current. However, in both the positive and negative potential ranges, the inductor (L 丄) stores the energy required for boosting, and then the inductor (L i) # discharges energy to increase the voltage of the bus capacitor (C 1) to achieve Efficient operation. As shown in the eighth and ninth diagrams, the specific implementation structure of the present invention is not limited to the previous embodiment, but the circuit can be modified as shown in the figure to still revert to the mode (f iyback mode) to solve the problems caused by different phases of the input mains and output voltage. As shown, it becomes-uninterruptible power supply system (ups), the battery backup source circuit (60) & mains power can store energy under normal conditions, once the mains power is interrupted or abnormal, it will be transferred to the battery backup source circuit Supply to load. On the other hand, the circuits of the foregoing embodiments can directly receive the mains power and mention:-a high-quality clean power supply to the load, so it can be regarded as a mains power supply. However, if it is based on the aforementioned mains voltage stabilizer frame plus a battery backup source circuit (60) (such as the tenth A to twelfth), the power supply technology of the present invention is not stable for the input mains quality. 5. The frequency changes quickly, and the m-back mode (Fiyback _e) can avoid abnormal circuit problems caused by different phases of the mains and output voltages. Furthermore, the quality of the city ’s best-selling power input can also use the boost mode (
Boost mode )以提高4文轉驻罢从了仏 、 飫同i 哀置的工作效率，相較於目前的 電源供電技術，本終明过香^ θ 不心明確貫極具進步性且符合發明專利要 件，爰依法提出申請。 【圖式簡單說明】 (一）圖式部分 200425624 第圖·為本發明一實施例之電路架構圖。 第二圖··為本發明電路動作時序示意圖。 第三圖：為本發明之兩切換開關Q 1 、Q 2岣為導、雨 ¥之電路動作圖，纟中交流輸人電源為正相位。… 第四圖：為本發明之兩切換開關Q丄、Q 2岣為導通 時之電路動作圖，其中交流輸入電源為負相位。 第五圖：為本發明之兩切換開關Q丄、Q 2均為截止 時之電路動作圖。 第六圖：為本發明之切換開關Q1導通而另—切換開 關Q2截止時之電路動作圖。 、 第七圖：為本發明之切換開關Q 1截止而另一切換開 關Q2導通時之電路動作圖。 第八圖·係本發明另一實施例之電路圖。 第九圖：係本發明又一實施例之電路圖。 第十A〜十C圖：係本發明連接一電池備源電路而成 為不斷電系統之電路圖。 第十一圖〜第十三圖··係習用非隔離式雙bus架構之 UPS 〇 第十四圖：係一習用非隔離式單bus架構之UPS。 (二）元件代表符號 (1 〇 )交流輸入電源（2 0 )交流/直流轉換單元 (2 1 )全橋整流器 （3 0 )直流/交流轉換單元 (4 0 )負載 (6 〇 )電池備源電路 200425624 Q 1、Q 2切換開關 Q 3〜Q 6開關晶體 C 1匯流排電容（B U S電容） C 2輸出電容 L1電感 L2輸出電感Boost mode) in order to improve the work efficiency of the transfer of the four texts, compared with the current power supply technology, compared to the current power supply technology, this is better than the last ^ ^ Unintended and clear, very progressive and consistent with the invention The patent requirements were filed in accordance with the law. [Brief Description of the Drawings] (1) Schematic Part 200425624 Figure · This is a circuit architecture diagram of an embodiment of the present invention. The second figure ... is a schematic diagram of a circuit operation timing of the present invention. The third figure is the circuit operation diagram of the two switching switches Q 1 and Q 2 of the present invention, which are conducting and raining. The AC input power in the middle is positive phase. … The fourth diagram: This is the circuit operation diagram when the two switching switches Q 丄 and Q2 发明 of the present invention are on, in which the AC input power is in negative phase. Fifth figure: This is a circuit operation diagram when the two switching switches Q 丄 and Q2 of the present invention are both off. The sixth figure is a circuit operation diagram when the switch Q1 of the present invention is on and the switch Q2 is off. Figure 7 is a circuit operation diagram when the switch Q1 of the present invention is turned off and the other switch Q2 is turned on. The eighth figure is a circuit diagram of another embodiment of the present invention. The ninth figure is a circuit diagram of another embodiment of the present invention. The tenth A to ten C diagrams are circuit diagrams of the present invention connected to a battery backup source circuit to form a UPS system. The eleventh to thirteenth drawings are UPS with a conventional non-isolated dual bus architecture. The fourteenth drawings: a UPS with a non-isolated single bus architecture. (2) Symbols of components (1 0) AC input power supply (2 0) AC / DC conversion unit (2 1) Full bridge rectifier (3 0) DC / AC conversion unit (4 0) Load (6 0) Battery backup source Circuit 200425624 Q 1, Q 2 switch Q 3 ~ Q 6 switch crystal C 1 bus capacitor (BUS capacitor) C 2 output capacitor L1 inductor L2 output inductor
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