1353104 九、發明說明： 【發明所屬之技術領域】 本發明涉及-種不間斷電源裝置，尤指一種改進 的線上式不間斷電源裝置。 【先前技術】 不間斷電源OIPS)是一種交流電源裝置。目前， 習知的線上式不_電源裝置，採用交流_直流、直 流-交流的雙轉換裝置。如帛2圖所示，市電輸入先 由滤波裝置（111)進行錢，再經過保險絲（112)超載 保護’再由三相全橋整流裝置⑴3)整流，經電容濾 波裝置（115)濾、成直流電壓，電池裝置（1⑷也經過三 相全橋整流裝置⑴3)提供直流電塵，經過保險絲 (1⑹送到逆變裝置（117)，將直流電壓採用 SPWM(SINEWAVE PULSE WIDTH MODULATION)^ ^ 經工頻變壓器隔離升壓產生正弦波電壓，經過繼電裝 置(118)切換輸出淨化的交流電源再經過濾波裝置 (119)渡波後輸$ _戶替電。但是目前習知的線 上式不間斷電源裝i UPS存在以下幾個問題：⑴整 機滿負荷運行效率約8Q%，輕載時效率更低；⑵輸入 採用全波整流，輪入功率因數⑽職facter，簡稱 PF)只有G. 6 ; (3)在系統中產生很高的諸波電流影響 電網電力品質。 1353104 【發明内容】 本發明的一個目的在於提供一種線上式不間斷 電源裝置，其包含一個由處理裝置控制的直流/交流 轉換裝置，根據輸出端檢測到的電流諧波來產生諧波 電流注入市電輸出端’以抵消所檢測到的電流諧波， 從而降低系統中的諧波電壓與諳波電流，使之符合電 力法規的規定，實現節能的目的。 • 為實現本發明的上述目的’本發明的線上式不間 斷電源裝置包括： 一第一慮波裝置’設置於市電輸入端，用來對所 輪入的市電進行濾波； 一電池裝置，用於提供直流電壓； 一交流/直流轉換裝置，其輸入端電連接於該第 一濾波裝置，用於將經濾波的交流電壓轉換為直流電 • 壓輪出； 一直流/交流轉換裝置，其輸入端電連接於所述 交流/直流轉換裝置的輸出端，並且與電池裝置的輸 出端電連接，用來將交流/直流轉換裝置或電池裝置 輪出的直流電壓轉換為交流電壓； 一第二濾波裝置’設置於市電輸出端，用來對所 輪出的市電進行濾波； 一電源，用來提供電源給該線上式不間斷電源裝 6 1353104 置的控制電路及驅動電路；以及 一處理裝置；其中 該直流/交流轉換裝置包括一低通濾波器，以及 兩個自關斷電力半導體器件；該處理裝置，利用數位 訊號處理器（DSP)或微處理器（MPU)來提供PWM訊號， 在輸出端檢測到電流諧波時’控制該直流/交流轉換 裳置的兩個自關斷電力半導體器件交替開關切換以 產生諧波電流注入市電輸出端，從而抵消所檢測到的 電流諧波。 本發明的另一目的在於提供一種改進的線上式 不間斷電源裝置，其包含一個由處理裝置控制的交流 /直流轉換裝置，根據輸入電流波形及輸出電壓回 饋’來調整輸入電流的波形，使輸出電流接近正弦 波’從而提供輸入功率因數修正。 為實現本發明的上述目的，該線上式不間斷電源 裝置的該交流/直流轉換裝置包括：一低通濾波器， 一用於儲能的電感，兩個自關斷電力半導體器件，以 及用於分別對通過該自關斷電力半導體器件的電壓 進灯濾波的電容；該處理裝置根據該交流/直流轉換 裝置的輸入電流波形及輸出電壓回饋，控制該交流/ 直流轉換裝置的兩個自關斷電力半導體器件交替開 7 1353104 關切換以使輸出電流的波形接近正弦波。 該線上式不間斷電源裝置由於採用上述技術方 案，利用數位化處理裝置控制交流/直流轉換裝置及 直流交流轉換裝置，採用混合運作控制，降低總的能 置的損耗，降低待機功率損耗，並提高輸入功率因 數，降低總諧波電流及總諧波電壓，在較寬市電電壓 波動範圍内可滿載運行，提高供電電源品質與整機運 • 行效率，實現節能的目的。 【實施方式】 凊參閱第1圖，為本發明線上式不間斷電源裝置 較佳具體實施例的結構方塊示意圖。該線上式不間 斷電源裝置包括： 一二相平衡開關裝置（1 )，由兩個獨立的開關裝 置（11)02)組成，設置於市電輸入端，用來根據處理 籲裝置（17 )檢測到市電輸入端的三相電壓對該開關裝 置（11)或（12)進行控制，從而可選擇地電連接較輕負 荷的單相電源，以平衡三相供電； 一第一開關裝置（8)，設置於市電輸入端與輸出 端之間’用來連接或斷開市電供應與市電輸出端的連 接； 一第一濾波裝置（2) ’設置於市電輸入端，用來 對所輸入的市電進行濾波； 8 1353104 一電池裝置（18) ’用於提供直流電壓； 一直流/直流轉換裝置（19)，設置於該電池裝置 (18)與直流/交流轉換裝置（7)之間，用來在低電池電 壓時將直流低電壓升壓為直流高電壓； 一交流/直流轉換裝置（6)，其輸入端電連接於該 第一濾波裝置（2) ’用於將經濾波的交流電壓轉換為 直流電壓輸出； • 一第一保護裝置（3)，設置於該第一濾波裝置（2) 與交流/直流轉換裝置（6)之間，防止電路超載及短路 保護； 一限流保護裝置（4)，設置於該第一濾波裝置（2) 與交流/直流轉換裝置（6)之間，該限流保護裝置（4) 包括兩個以並聯方式電連接的兩個獨立第三開關裝 置（41)、第四開關裝置（42)，以及與該第四開關裝置 籲 （42)串聯電連接的電阻（43)，用以限制該線上式不間 斷電源裝置的啟動電流，並在電池供電時完全切離該 線上式不間斷電源控制裝置與系統電網的連接避免 UPS的電磁干擾與電磁相容的問題； 一直流/交流轉換裝置（7)，其輸入端電連接於該 交流/直流轉換裝置（6)的輸出端，並且與電池裝置 (18)的輸出端電連接，用來將交流/直流轉換裝置（6) 9 1353104 或電池裝置（18)輸出的直流電壓轉換為交流電壓； 一第二保護裝置（5)，設置於該的第一濾波裝置 (2)與第二濾波裝置（10)之間，防止電路超載及短路 保護； 一第二開關裝置（9)’設置於直流/交流轉換裝置 (Ό與市電輸出端之間，用來連接或斷開直流/交流轉 換裝置（7)與市電輸出端的連接； 一第二濾波裝置（10)’設置於市電輸出端，用來 對所輸出的市電進行濾波； 一電源（20)，用來提供電源給該不間斷電源裝置 的控制電路及驅動電路；以及 一處理裝置（17)。 該第一保護裝置（3)、第二保護裝置（5)可採用保 險絲或斷路器。 上述的直流/直流轉換裝置（19)，由DSp控制器 產生 PWM (PULSE WIDTH MODULATION)控制訊號，來控1353104 IX. Description of the Invention: [Technical Field] The present invention relates to an uninterruptible power supply device, and more particularly to an improved online uninterruptible power supply device. [Prior Art] The uninterruptible power supply (OIPS) is an AC power supply device. At present, the conventional online type is not a power supply device, and uses an AC-DC, DC-AC double conversion device. As shown in Fig. 2, the mains input is firstly filtered by the filtering device (111), and then rectified by the fuse (112) overload protection and then rectified by the three-phase full-bridge rectifying device (1) 3), filtered by the capacitive filtering device (115). DC voltage, battery device (1 (4) also through the three-phase full-bridge rectifier (1) 3) to provide DC dust, through the fuse (1 (6) to the inverter (117), the DC voltage using SPWM (SINEWAVE PULSE WIDTH MODULATION) ^ ^ power frequency The transformer is isolated and boosted to generate a sine wave voltage, and the relay device (118) switches the output of the purified AC power source and then passes through the filtering device (119) to pass the wave and then loses the $_ household to replace the power. However, the conventional online uninterruptible power supply is installed. The UPS has the following problems: (1) The whole machine operates at a full load efficiency of about 8Q%, and the efficiency is lower at light loads; (2) The input uses full-wave rectification, and the turn-in power factor (10) service facter, referred to as PF) is only G. 6; Producing high wave currents in the system affects grid power quality. 1353104 SUMMARY OF THE INVENTION An object of the present invention is to provide an on-line uninterruptible power supply device including a DC/AC conversion device controlled by a processing device, which generates harmonic currents to be injected into the mains according to current harmonics detected at the output terminals. The output terminal 'offsets the detected current harmonics, thereby reducing the harmonic voltage and the chopping current in the system, so that it meets the requirements of the power regulations and achieves the purpose of energy saving. • In order to achieve the above object of the present invention, an in-line uninterruptible power supply device of the present invention includes: a first wave-splitting device 'disposed at a mains input terminal for filtering a wheeled mains; and a battery device for Providing a DC voltage; an AC/DC converter device having an input terminal electrically connected to the first filtering device for converting the filtered AC voltage into a DC power supply; a DC/AC conversion device having an input terminal Connected to the output of the AC/DC converter and electrically connected to the output of the battery device for converting the DC voltage of the AC/DC converter or the battery device into an AC voltage; a second filter device It is disposed at the output of the utility power and is used for filtering the commercial power that is turned out; a power supply is used to supply power to the control circuit and the driving circuit of the online uninterruptible power supply 6 1353104; and a processing device; wherein the DC /AC conversion device includes a low pass filter, and two self-shutdown power semiconductor devices; the processing device utilizes digital information A processor (DSP) or a microprocessor (MPU) provides a PWM signal, and when the current harmonic is detected at the output end, the two self-shutdown power semiconductor devices that control the DC/AC conversion are alternately switched to generate a harmonic The wave current is injected into the mains output to cancel the detected current harmonics. Another object of the present invention is to provide an improved online uninterruptible power supply device including an AC/DC converter controlled by a processing device, which adjusts the waveform of the input current according to the input current waveform and the output voltage feedback to make the output The current is close to the sine wave' to provide input power factor correction. To achieve the above object of the present invention, the AC/DC conversion device of the online uninterruptible power supply device includes: a low pass filter, an inductor for energy storage, two self-shutdown power semiconductor devices, and Capacitor for filtering the voltage through the self-shutdown power semiconductor device; the processing device controls two self-shutdowns of the AC/DC converter according to the input current waveform and the output voltage feedback of the AC/DC converter The power semiconductor device alternates with 7 1353104 switching to make the waveform of the output current close to a sine wave. The online uninterruptible power supply device adopts the above technical solution, and uses the digital processing device to control the AC/DC conversion device and the DC AC conversion device, and adopts mixed operation control to reduce the total energy loss, reduce the standby power loss, and improve Input power factor, reduce total harmonic current and total harmonic voltage, and operate at full load within a wide range of mains voltage fluctuations, improve the quality of power supply and the efficiency of the whole machine, and achieve energy saving. [Embodiment] FIG. 1 is a block diagram showing the structure of a preferred embodiment of an in-line uninterruptible power supply device according to the present invention. The online uninterruptible power supply device comprises: a two-phase balancing switch device (1) consisting of two independent switching devices (11) 02) disposed at the mains input end for detecting according to the processing call device (17) The three-phase voltage of the mains input terminal controls the switching device (11) or (12) to selectively electrically connect the light-loaded single-phase power supply to balance the three-phase power supply; a first switching device (8), setting The connection between the mains input and the output terminal is used to connect or disconnect the mains supply from the mains output; a first filtering device (2) is provided at the mains input for filtering the input mains; 8 1353104 A battery device (18) 'for providing a DC voltage; a DC/DC converter device (19) disposed between the battery device (18) and the DC/AC converter device (7) for use at a low battery voltage The DC low voltage is boosted to a DC high voltage; an AC/DC converter (6) whose input is electrically connected to the first filtering device (2) 'for converting the filtered AC voltage to a DC voltage output A first protection device (3) is disposed between the first filter device (2) and the AC/DC converter device (6) to prevent circuit overload and short circuit protection; a current limiting protection device (4), setting Between the first filtering device (2) and the AC/DC converting device (6), the current limiting protection device (4) comprises two independent third switching devices (41) electrically connected in parallel. a four-switch device (42), and a resistor (43) electrically connected in series with the fourth switch device (42) for limiting a starting current of the online uninterruptible power supply device and completely cutting off the battery when the battery is powered The connection between the online uninterruptible power supply control device and the system power grid avoids the problem of electromagnetic interference and electromagnetic compatibility of the UPS; a DC/AC conversion device (7) whose input end is electrically connected to the AC/DC conversion device (6) The output terminal is electrically connected to the output of the battery device (18) for converting the DC voltage outputted by the AC/DC converter device (6) 9 1353104 or the battery device (18) into an AC voltage; a second protection device ( 5), set in the Between the first filtering device (2) and the second filtering device (10), the circuit is prevented from being overloaded and short-circuit protected; and a second switching device (9) is disposed between the DC/AC conversion device (between the 市 and the commercial output terminal, Used to connect or disconnect the DC/AC conversion device (7) from the mains output; a second filter device (10)' is provided at the mains output for filtering the output mains; a power supply (20) a control circuit and a drive circuit for supplying power to the uninterruptible power supply device; and a processing device (17). The first protection device (3) and the second protection device (5) may be provided with a fuse or a circuit breaker. DC/DC converter (19), which generates a PWM (PULSE WIDTH MODULATION) control signal from the DSp controller to control
制直流/直流轉換裝置（19)内部的自關斷電力半導體 器件，將電池直流電壓升壓轉換成高直流電壓，檢測 輸出直流高電壓上電壓回饋訊號（121)(122)調整pwM 寬度，產生固定的直流高電壓輸出，該裝置只在電池 供電直交變換輸出模式下才會工作，有市電時不工 10 1353104 作。 上述的交流/直流轉換裝置（6),當市電接入時由 該限流保護裝置（4)限制啟動電流，利用半導體器件 (64)(65)内置的旁路二極體組成半橋全波整流電 路，市電正半周經半導體器件（64)内置的旁路二極體 對第一電谷（66)充電滤成正直流電壓，市電負半周經 半導體器件（65)内置的旁路二極體對第三電容（67) 籲充電濾成負直流電壓，市電零線電壓成為直流電壓的 零伏端，等啟動電流穩定後由Dsp控制器產生pWM控 制訊號，來控制自關斷電力半導體器件（64)(65)交替 開關切換，又DSP控制器通過電感器（63)所組成的升 壓電路檢測輸入電流波形（62)，及輸出直流電壓回饋 訊號（121)(122)以調整PWM寬度，使輸入電流波形接 近正弦波並提供固定的輸出直流高電壓，使市電輸入 • 功率因數接近1。 上述的直流/交流轉換裝置（7)，是一典型的半橋 逆變（INVERTER)裝置，由自關斷電力半導體器件 (71)(72) ’第三電感（74)，第四電容（75)所組成的可 向用戶端市電注入諧波電流的諧波發生器，可以產生 相位頻率幅值可調的諧波電流，將這些諧波電流注入 系統，以抵/肖原有的諧波；也可以採用正弦脈波寬度 1353104 調製控制方式產生固定電壓固定頻率的純淨正弦波 電壓，由DSP控制器產生控制訊號，來控制自關斷電 力半導體器件（71)(72)做交替開關切換。控制模式分 為兩種：一種是正弦脈波調變訊號運行模式，由Dsp 控制器產生正弦脈波調變訊號（SPWM )將直流電壓轉 換後經第三電感（74)，第四電容（75)，濾成工頻的正 弦波電壓，並檢測輸出電壓回饋訊號（77)調整SPWM 鲁訊號產生固定電壓固定頻率的純淨正弦波電壓；一種 是主動濾波（Active- Filtrate)運行模式，由DSP控 制器檢測輸出端諸波電流（7 8 )，產生反向證波電流注 入到輸出端，檢測所產生的諧波電流（73)，抵消用戶 端設備產生的諧波電流’讓輸出端的電流波形（78)接 近正弦波電流，降低總諧波電流符合電力法規的要 求。 • 上述電源（20)，輸入電源主要交流/直流轉換裝 置（6)輸出端做為電源的輸入，並有一電池供電回路 可啟動控制電源’在無市電下可以實現由電池供電， 起動UPS輸出供電。另有一充電回路除了在電池供電 運行模式不工作外，其他模式都能對電池充電，並由 DSP控制器檢測電池電壓’充電電壓，充電電流，電 池放電時間及次數管理’電池使用年限到期通知等智 12 1353104 能化管理。 本發明的該較佳具體實施例的線上式不間斷電 源裝置的具體工作模式如下： 模式一：市電旁路輸出模式 在市電電力供電品質良好且用戶端的設備有功 因提升裝置使功率因數接近丨時，市電從三相平衡開 關裝置（1)經過第一濾波裝置（2)，第一電感（21)，第 一保護裝置（5)，第一開關裝置（8)，第二濾波裝置 (10)，將市電輸出給用戶的設備，本機即時檢測輸出 電壓將回饋電壓（76)，輸出電流波形（78)接入處理裝 置（17)，DSP根據市電供電品質的狀況調整運行模 式，此模式該線上式不間斷電源裝置整機滿載運行效 率 >97%。 模式二：主動濾波運行模式 在市電電力供電品質在電力法規規定的電壓，頻 率，範圍内，同市電旁路輸出一樣將市電從三相平衡 開關裝置⑴經過第一遽波裝置（2)，第一電感（21)， 第二保護裝置⑸，第-開關裝置⑻，第二遽波裝置 (10)，將市電輸出給用戶的設備，此時第二開關裝置 (9)導通，直流/交流轉換裝置（7)將會工作。由Dsp 控制it檢測m)輸出端電流波形’送出清訊號供 13 1353104 (71)(72)自關斷電力半導體器件做交替開關切換，產 生高頻諧波電流經（73)電流波形檢測，第三電感 (74)，第四電容（75)組成的低通濾波器，經第二開關 裝置（9)注入到輸出端，抵消用戶端設備產生的諧波 電流’讓輸出端的電流波形變成正弦波電流，純阻性 負載，提高功率因數接近1，並降低總諧波電壓（<3%) 與諸波電流（<3%)符合電力法規的要求，由於直流/交 籲流轉換裝置（7)採用補償並聯運行，該線上式不間斷 電源整機滿载運行效率>93%。 模式三：交直交雙變換輸出模式 由電壓檢測器（16 )檢測市電輸入電壓，在市電電 力供電品質超出電力法規規定的電壓、頻率範圍時， 將市電從三相平衡開關裝置（1)經過第一濾波裝置 (2)，第一電感（21)，第一保護裝置（3)，限流保護裝 •置（4)，交流/直流轉換裝置（6)，直流/交流轉換裝置 (7)，第二開關裝置（9) ’第二濾波裝置（1〇)輸出純淨 的電源給用戶的設備，第一開關裝置斷開。第一 電感（21)，第一電容（61)組成低通濾波電路後，經電 流波形檢測（62) ’第二電感（63)與自關斷電力半導體 器件（64)，自關斷電力半導體器件（65)組成的交流/ 直流轉換裝置（6) ’由DSP控制器檢測（62)輸出端電 1353104 流波形及輸出端電壓回饋（121)(122)，調整PWM訊號 控制自關斷電力半導體器件（65)，自關斷電力半導體 器件（64)做交替開關切換，使輸入電流接近正弦波， 將輸入功率因數修正到接近1，並轉換成直流高電壓 經第二電容（66)，第三電容（67)濾波作為正負直流電 壓’作為直流/交流轉換裝置（7)的輸入電源。直流/ 交流轉換裝置（7)，由（71)(72)自關斷電力半導體器 件組成半橋逆變器，由DSP控制器產生正弦脈衝調變 訊號（SPWM)將直流電壓由（71)(72)切換開關，經第三 電感（74) ’第四電容（75)將高頻諧波濾除成為純淨的 正弦波電源輸出’輸出電壓回饋（77)與電流波形（73) 檢測來提供給控制裝置調整SPWM訊號，輸出產生固 定電壓固定頻率的純淨正弦波電壓，並檢測電流波形 (73)做超載與輸出短路保護。 模式四：電池供電直交變換輸出模式 市電停電或瞬斷時，交流/直流轉換裝置（6)將停 止工作’直流/直流轉換裝置（19)將電池電壓升壓轉 換提供直流電壓經第二電容（66)，第三電容（67)電容 據波輸出到直流母線’由DSP控制器產生脈衝調變訊 號（PWM)並控制自關斷電力半導體器件做交替開關切 換’輸出電壓檢測回饋（121)(122)送回DSP控制器調 15 1353104 整PWM寬度做閉回路數位化控制。直流/交流轉換裴 置（7)工作方式同模式三的輸出模式。在該種模式 下，該線上式不間斷電源以不間斷的狀態繼續提供純 淨的正弦波電源，直到電池低能量關機。 【圖式簡單說明】 第1圖為本發明的線上式不間斷電源裝置的結構 方塊示意圖》 第2圖為習知的線上式不間斷電源裝置結構方塊 示意圖。 【主要元件符號說明】 (I) 三相平衡開關裝置 （1〇)第二濾波裝置 (II) 開關裝置 （12)開關裝置 (13)(14)(15)(16)電壓檢測器 (19)直流/直流轉換裝置The self-shutdown power semiconductor device inside the DC/DC converter (19) converts the battery DC voltage to a high DC voltage, detects the output DC high voltage voltage feedback signal (121) (122), adjusts the pwM width, and generates Fixed DC high voltage output, the device will only work in the battery-powered DC-DC output mode, and it will not work 10 1353104 when there is mains. The above-mentioned AC/DC converter (6) limits the starting current by the current limiting protection device (4) when the mains is connected, and forms a half bridge full wave by using the bypass diode built in the semiconductor device (64) (65). The rectifier circuit, the mains half-period of the semiconductor device (64) built-in bypass diode charges the first electric valley (66) to a positive DC voltage, the mains negative half-cycle semiconductor device (65) built-in bypass diode The third capacitor (67) is charged and filtered into a negative DC voltage, and the mains zero line voltage becomes the zero volt end of the DC voltage. After the starting current is stabilized, the DW controller generates a pWM control signal to control the self-shutdown power semiconductor device ( 64) (65) alternating switch switching, and the DSP controller detects the input current waveform (62) through the booster circuit composed of the inductor (63), and outputs the DC voltage feedback signal (121) (122) to adjust the PWM width. Make the input current waveform close to the sine wave and provide a fixed output DC high voltage, making the mains input • power factor close to 1. The above DC/AC conversion device (7) is a typical half bridge inverter (INVERTER) device, which is composed of a self-shutdown power semiconductor device (71) (72) 'third inductance (74), fourth capacitance (75) a harmonic generator that can inject a harmonic current into the commercial power of the user terminal, can generate a harmonic current with adjustable phase frequency amplitude, and inject the harmonic current into the system to offset the original harmonic; The sinusoidal pulse width 1353104 modulation control method can also be used to generate a pure sine wave voltage with a fixed voltage fixed frequency, and the DSP controller generates a control signal to control the self-shutdown power semiconductor device (71) (72) to perform alternate switching. There are two control modes: one is the sinusoidal pulse modulation signal operation mode, and the sine pulse modulation signal (SPWM) is generated by the Dsp controller to convert the DC voltage to the third inductor (74) and the fourth capacitor (75). ), filter into the sine wave voltage of the power frequency, and detect the output voltage feedback signal (77) to adjust the SPWM Lu signal to generate a fixed voltage fixed frequency of pure sine wave voltage; one is the active filter (Active-Fitrate) operation mode, controlled by DSP The detector detects the wave current at the output (7 8 ), generates a reverse proof current injected into the output, detects the generated harmonic current (73), and cancels the harmonic current generated by the user equipment 'to make the current waveform at the output end ( 78) Close to the sine wave current, reducing the total harmonic current in line with the requirements of the electric power regulations. • The above power supply (20), input power main AC / DC conversion device (6) output as the power input, and a battery power supply circuit can start the control power supply 'can be powered by the battery without the mains, start UPS output power . In addition to a charging circuit that does not work in the battery-powered operating mode, other modes can charge the battery, and the DSP controller detects the battery voltage 'charging voltage, charging current, battery discharge time and number of times management' battery life expiration notice Wisdom 12 1353104 can be managed. The specific working mode of the online uninterruptible power supply device of the preferred embodiment of the present invention is as follows: Mode 1: The mains bypass output mode is good when the power supply of the commercial power is good and the power of the user equipment is increased due to the boosting device. The mains passes from the three-phase balancing switch device (1) through the first filtering device (2), the first inductor (21), the first protection device (5), the first switching device (8), and the second filtering device (10) The utility power is output to the user's equipment, the local machine detects the output voltage and feeds back the voltage (76), and the output current waveform (78) is connected to the processing device (17). The DSP adjusts the operation mode according to the state of the commercial power supply quality. On-line uninterruptible power supply unit full load operating efficiency > 97%. Mode 2: Active filter operation mode. In the voltage, frequency and range specified by the electric power regulations, the mains supply is passed from the three-phase balance switch device (1) through the first chopper device (2). An inductor (21), a second protection device (5), a first switching device (8), and a second chopper device (10) output the utility power to the user's device, and at this time the second switching device (9) is turned on, DC/AC conversion The device (7) will work. It is detected by Dsp control it) m) output current waveform 'send clear signal number for 13 1353104 (71) (72) self-shutdown power semiconductor device to do alternate switching, generate high frequency harmonic current through (73) current waveform detection, A low-pass filter composed of a three-inductor (74) and a fourth capacitor (75) is injected into the output through the second switching device (9) to cancel the harmonic current generated by the user equipment, so that the current waveform at the output becomes a sine wave Current, purely resistive load, increase power factor close to 1, and reduce total harmonic voltage (<3%) and wave current (<3%) in compliance with electrical regulations, due to DC/AC flow conversion device ( 7) Using compensation parallel operation, the on-line uninterruptible power supply has a full load operating efficiency > 93%. Mode 3: AC/DC double conversion output mode The voltage detector (16) detects the mains input voltage. When the mains power supply quality exceeds the voltage and frequency range specified by the electric power regulations, the mains is passed from the three-phase balance switch device (1). a filtering device (2), a first inductor (21), a first protection device (3), a current limiting protection device (4), an AC/DC conversion device (6), a DC/AC conversion device (7), The second switching device (9) 'the second filtering device (1〇) outputs a pure power source to the user's device, and the first switching device is turned off. The first inductor (21), the first capacitor (61) constitutes a low-pass filter circuit, and is subjected to current waveform detection (62) 'second inductor (63) and self-shutdown power semiconductor device (64), self-shutdown power semiconductor AC/DC converter (6) consisting of device (65) 'Detected by DSP controller (62) Output 1353104 flow waveform and output voltage feedback (121) (122), adjust PWM signal control self-shutdown power semiconductor The device (65), the self-shutdown power semiconductor device (64) is alternately switched, so that the input current is close to a sine wave, the input power factor is corrected to be close to 1, and converted into a DC high voltage via the second capacitor (66), The three capacitor (67) is filtered as the positive and negative DC voltage 'as the input power to the DC/AC converter (7). The DC/AC conversion device (7) consists of a (71) (72) self-shutdown power semiconductor device that constitutes a half-bridge inverter, and the DSP controller generates a sinusoidal pulse modulation signal (SPWM) to direct the DC voltage from (71) ( 72) switch, through the third inductor (74) 'fourth capacitor (75) to filter the high frequency harmonics into a pure sine wave power supply output 'output voltage feedback (77) and current waveform (73) detection to provide The control device adjusts the SPWM signal, outputs a pure sine wave voltage that generates a fixed voltage at a fixed voltage, and detects the current waveform (73) for overload and output short circuit protection. Mode 4: Battery-powered straight-through conversion output mode When the mains is powered off or short-circuited, the AC/DC converter (6) will stop working. The DC/DC converter (19) converts the battery voltage boost to provide DC voltage through the second capacitor ( 66), the third capacitor (67) capacitor is output to the DC bus according to the wave'. The PWM controller generates a pulse modulation signal (PWM) and controls the self-shutdown power semiconductor device to perform an alternate switching switch 'output voltage detection feedback (121) ( 122) Return to the DSP controller to adjust 15 1353104 full PWM width to do closed loop digital control. The DC/AC converter (7) works in the same mode as Mode 3. In this mode, the online uninterruptible power supply continues to provide a clean sine wave power supply in an uninterrupted state until the battery is powered down. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the structure of an in-line uninterruptible power supply device according to the present invention. Fig. 2 is a block diagram showing the structure of a conventional online uninterruptible power supply device. [Description of main component symbols] (I) Three-phase balanced switching device (1〇) Second filtering device (II) Switching device (12) Switching device (13) (14) (15) (16) Voltage detector (19) DC/DC converter
(111)濾波裝置 （11 2)保險絲 (113)三相全橋整流裝置（114)電池裝置 (11 6)保險絲 (118)繼電裝置 (121)(122)電壓回饋信號 (20)電源 (115)電容濾波裝置 (117)逆變裝置 (11 9)濾波裝置 (2) 第一遽波裝置 (21)第一電感 (3) 第一保護裝置 (4)限流保護裝置 16 1353104 (41)第三開關裝置 （42)第四開關裝置 (43)電阻 （5)第二保護裝置 (6)交流/直流轉換裝置（61)第一電容 (62)輸入電流波形 （63)第二電感 (64)(65)半導體器件 （66)第二電容 (67)第三電容 （7)直流/交流轉換裝置 (71)(72)自關斷電力半導體器件 (73)諧波電流 （74)第三電感 ♦ (75)第四電容 （76)回饋電壓 (77)輸出電壓回饋信號（78)諧波 (8)第一開關裝置 （9)第二開關裝置 17(111) Filter device (11 2) Fuse (113) Three-phase full-bridge rectifier device (114) Battery device (116) Fuse (118) Relay device (121) (122) Voltage feedback signal (20) Power supply (115 Capacitor filtering device (117) Inverter device (11 9) Filter device (2) First chopper device (21) First inductance (3) First protection device (4) Current limiting protection device 16 1353104 (41) Three-switch device (42) fourth switch device (43) resistor (5) second protection device (6) AC/DC converter device (61) first capacitor (62) input current waveform (63) second inductor (64) (65) Semiconductor device (66) Second capacitor (67) Third capacitor (7) DC/AC converter (71) (72) Self-shutdown power semiconductor device (73) Harmonic current (74) Third inductor ♦ (75) fourth capacitor (76) feedback voltage (77) output voltage feedback signal (78) harmonic (8) first switching device (9) second switching device 17