1342102 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種具有雙向可調電壓之海流發電轉 換器，特別是關於利用一可調直流鏈電壓電路藉由升壓及 降壓模式的操作進行能量的雙向傳遞，以提高能源的使用 效率、提升儲能電容充電效率、延長儲能電容的使用壽命 及增加蓄電池額定設計的彈性裕度之具有雙向可調電壓之 海流發電轉換器。 【先前技術】 習用海流發電轉換器，如日本第·ΙΡ2006291780號「設 .-· ~_置於海床/河床之發電裝置」專利，其係為一將海流之流動 之動能轉換為電能之裝置，其包含一腔體及一發電機。該 腔體具有一進入側及一排出侧，該排出側之寬度係小於該 進入側，且該發電機係設置在該進入側及排出側之間，以 便海流由該進入侧往排出侧流動時，因二者寬度不同而使 海流加速，進而使該發電機之扇葉轉動加劇，以產升更多 的電量。 然而，一般而言，上述習用具有下列缺點，例如：由 於海流的流速不會保持固定，因此其發電量也相對的不穩 定，若沒有適當的轉換裝置進行能量的轉換，以及利用蓄 電池裝置進行能量的儲存，將導致發電效率低落，且供電 不穩定的情況發生基於上述原因，有必要進一步改良上述 習用海流發電轉換器。 有鑑於此，本發明改良上述之缺點，其係利用一靜態 ΡΚ10317 2007/5/25 ——6 — 式海流發電模組產生 直流鏈電壓電路及〜直流電壓，該直流電壓經過一可調 出電壓，並II由一流/交流逆變器可轉換成〜交流輸 電壓電路可將該蓄=池儲存該直流電壓。該可調直流鍵 直流側的電题進的直流電壓及直流/交流逆變器之 的傳遞，‘能提J及降壓之操作’以便進行雙向能量 效率及延長儲rb，源的使用效率、提升儲能電容充電 鏈電壓電路可二二的使用壽命。再者’由於該可調直流 的選用較小額入側之直流電壓值，因此可較彈性 【發明内容】、、電池容量’以進一步降低裝置成本。 j海流糾—種㈣料可調電壓之 間設置-可調在一f電池及—直流/交流逆變器之 的使用效率壓電路，使得本發以有提升能源 命及增加蓄電铸^錢電效率、延長錢池的使用壽 电/也額弋設計的彈性裕度之功效。 ，其^有雙向可調電壓之海㈣電轉換器 轉換哭、流發賴組一最大轉調整之升壓 逆二：=池、-可調直流鏈電壓電路、直流/交流 換哭❿式海流發電模組、最大功心轉之升壓轉 、二畜電池依序連接，讀將該靜態式海淹發電模组產 流電壓進行轉換、升壓及儲能；該，直流鏈電墨 电/、有一輸入側及—輸出側，該輸入側連镇該蓄電、、也， 二=入：電壓係小於該輸出側電壓，且該可調：:鏈電 土电路可耜由升壓及降壓之操作進行雙向能量傳遞；該直 pKl〇3l7 2〇〇7/5/25 .—7 1342102 w 流/交流逆變器係連接該可調直流鏈電壓電路之輸出側，該 直流/交流逆變器可轉換該可調直流鏈電壓電路之輸出側 電壓為一交流輸出電壓，以供應一負載。 【實施方式】 為讓本發明之上述及其他目的、特徵及優點能更明顯 易懂，下文特舉本發明之較佳實施例，並配合所附圖式， 作詳細說明如下： 請參照第1圖所示，本發明第一實施例之具有雙向可 調電壓之海流發電轉換器係包含一靜態式海流發電模組1 、一最大功率調整之升壓轉換器2、一蓄電池3、一可調直 流鏈電壓電路4、一直流/交流逆變器5、一負載6及至少 一微控制器7。 h 請再參照第1圖所示，該靜態式海流發電模組1係設 置在海平面底下，其可相對海流的移動速度感應出一直流 電壓，且該直流電壓是不穩定之直流電壓，因此，需利用 該轉換器進行升壓、降壓及轉換，以便產生一穩定的交流 輸出電壓；該最大功率調整之升壓轉換器2之一輸入側連 接該靜態式海流發電模組1，並將其直流電壓轉換為一第 一直流電壓，該第一直流電壓高於該靜態式海流發電模組 之直流電壓；該蓄電池3連接至該最大功率調整之升壓轉 換器2之一輸出側，並接收該第一直流電壓，以便蓄集電 量；該可調直流鏈電壓電路4之一輸入側連接至該蓄電池 3及該最大功率調整之升壓轉換器2之輸出側，並轉換產 生一第二直流電壓；該直流/交流逆變器5係連接該可調直 PK10317 2007/5/25 —8 — 1342102 < 流鏈電壓電路4之一輸出側，該直流/交流逆變器5可接收 該第二直流電壓，該直流/交流逆變器5可轉換該第二直流 電壓為該交流輸出電壓，以供應該負載6 ;該微控制器7 可控制該最大功率調整之升壓轉換器2、可調直流鏈電壓 電路4及直流/交流逆變器5，以產生該第一直流電壓、第 二直流電壓及交流輸出電壓。 請再參照第1圖所示，該最大功率調整之升壓轉換器 2之第一直流電壓係小於該可調直流鏈電壓電路4之第二 直流電壓，因此，在該蓄電池3容量的選擇上，可選用較 小的電容器，例如選用一 36伏特的蓄電池，進而可節省裝 置成本及具有更佳的設計彈性。 ,-] 請再參照第1圖所示，該最大功率調整之升壓轉換器 2係包含一電感器21、一二極體22、一電力電子開關23 及一電容器24。該電感器21之一端連接至該靜態式海流 發電模組1之正端，而該電感器21另一端與該二極體22 及電力電子開關23之一端則相互連接；該二極體22之另 一端連接至該電容器24及蓄電池3之一端；該電力電子開 關23、電容器24及蓄電池3之另一端則與該靜態式海流 發電模組1之負端相互連接。該電力電子開關23可藉由該. 微控制器進行導通及關閉之控制，並將該靜態式海流發電 模組1之直流電壓進行升壓，以便產生該第一直流電壓， 並對該蓄電池3充電。 請再蒼照弟1圖所不’该可调直流键電壓電路4係包 含一第一組電力電子開關串聯電路41、一第二組電力電子 PK10317 2007/5/25 1342102 4 開關串聯電路42、一電感器43、一輸入電容器Cl及一穩 壓電容器C2。該第一組電力電子開關串聯電路41係由一 第一電力電子開關T1及一第三電力電子開關T3串聯連接 而成；該第二組電力電子開關_聯電路42則由一第二電力 電子開關T2及一第四電力電子開關丁4串聯連接而成。各 該電力電子開關T1至T4均分別並聯一飛輪二極體D1至 D4。其中該第一組電力電子開關串聯電路41及第二組電 力電子開關串聯電路42共同組成一二橋臂式的全橋架構。 j 請再參照第1圖所示，該可調直流鏈電壓電路4之第 電力電子開關T1及第三電力電子開關T3之串聯連接處 係具有一第一輸出端；該第二電力電子開關T2及第四電 力電子開關T4之串聯連接處則具有一第二輸出端。該電 感器43之一端連接至該輸入電容器C]與蓄電池3之一端 ，而該電感器43之另一端則連接至該第二輸出端，另外， 該輸入電容器C1之另一端與蓄電池3之另一端則連接到 該第一輸出端及該蓄電池3之另一端。 請再參照第1圖所示，該直流/交流逆變器5係由一第 三組電力電子開關串聯電路51、第四組電力電子開關串聯 電路52及第五組電力電子開關串聯電路53所組成。該第 三組電力電子開關串聯電路51由二個電力電子開關Q1及 Q4 -聯連接而成，其串聯連接處具有一第三輸出端；該第 四組電力電子開關串聯電路52則分別由二個電力電子開 關Q3及Q6串聯連接而成，其串聯連接處具有一第四輸出 端；同樣的，該第五組電力電子開關串聯電路53亦分別由 PK1Q317 2007/5/25 --10 — 1342102 4 二個電力電子開關Q2及Q5串聯連接而成，其串聯連接處 具有一第五輸出端。各該電力電子開關Q1至Q6均分別並 聯一飛輪二極體〔未標示〕。該直流/交流逆變器5之第三 組、第四組及第五組輸出端係連接至一負載，例如一具有 48伏特之直流無刷馬達。 請再參照第1圖所示，該直流/交流逆變器5由該第三 組、第四組及第五組電力電子開關51至53組成一三橋臂 式的全橋架構。該直流/交流逆變器5可藉由該微控制器7 進行120度六步方波的切換控制。亦即，在一時間内僅有 二個電力電子開關被導通，其導通的順序依序為Ql、Q2 導通；Q3、Q2導通；Q3、Q4導通；Q5、Q4導通；Q5、 Q6導通；Ql、Q6導通。藉此，該直流/交流逆變器5可將 該第二直流電壓轉換成該交流輸出電壓，以供應該負載6 使用。 j] 請參照第2A及2B圖所示，其揭示本發明第一實施例 由該蓄電池3朝該穩壓電容器C2提供電能之電流流向， 此時該可調直流鏈電壓電路4操作成升壓模式。更詳言之 ，由於該蓄電池3之端電壓係小於該穩壓電容器C2之端 電壓，因此必須藉由該可調直流鏈電壓電路4進行升壓的 操作，再藉由該直流/交流逆變器5之操作，可將該穩壓電 容器C2上的電壓〔即升壓後的電壓〕供應至該負載6,以 供電能的使用。此時，該微控制器7可控制該第一電力電 子開關丁1及第二電力電子開關T2操作為斷開的狀態；該 第三電力電子開關T3係操作成持續導通的狀態；而該第1342102 IX. Description of the Invention: [Technical Field] The present invention relates to a sea current power converter having a bidirectional adjustable voltage, and more particularly to an operation using a tunable DC link voltage circuit by boosting and bucking modes A two-way adjustable voltage ocean current power converter that performs energy bidirectional transmission to improve energy efficiency, improve storage capacitor charging efficiency, extend the life of the storage capacitor, and increase the elastic margin of the rated design of the battery. [Prior Art] A conventional ocean current power converter, such as the Japanese Patent No. 2006291780, "Setting a .-·~_Power Device for Seabed/River," is a device that converts the kinetic energy of the current of the current into electrical energy. It comprises a cavity and a generator. The cavity has an entry side and a discharge side, the discharge side has a width smaller than the entry side, and the generator is disposed between the entry side and the discharge side so that the current flows from the entry side to the discharge side Because of the different widths of the two, the current is accelerated, which in turn increases the fan blade rotation of the generator to generate more power. However, in general, the above-mentioned drawbacks have the following disadvantages, for example, since the flow rate of the current does not remain fixed, the amount of power generation is relatively unstable, and energy conversion is performed without a suitable switching device, and energy is performed using a battery device. The storage will result in low power generation efficiency, and the unstable power supply will occur based on the above reasons, and it is necessary to further improve the above-mentioned conventional sea current power converter. In view of the above, the present invention improves the above-mentioned disadvantages by using a static ΡΚ 10317 2007/5/25 -6-type ocean current power generation module to generate a DC link voltage circuit and a DC voltage, the DC voltage passing through an adjustable voltage , and II can be converted into a ~ AC voltage circuit by a first-class / AC inverter can store the DC voltage. The DC voltage on the DC side of the adjustable DC button and the DC/AC inverter are transmitted, and the operation can be performed for the two-way energy efficiency and the storage efficiency of the source. Improve the storage capacitor voltage chain voltage circuit can be used for two or two. Furthermore, since the adjustable DC is selected to have a smaller DC voltage value on the input side, it is more flexible [invention] and battery capacity to further reduce the device cost. j sea current correction - kind of (four) material adjustable voltage between the settings - adjustable in a f battery and - DC / AC inverter use efficiency voltage circuit, so that the hair to increase energy life and increase storage power casting money Electrical efficiency, extending the use of the life of the money pool / also the flexibility margin of the design. , ^ There are two-way adjustable voltage sea (four) electric converter to switch to cry, flow to the group to a maximum turn adjustment of the boost reverse two: = pool, - adjustable DC chain voltage circuit, DC / AC for crying current The power generation module, the maximum power transfer to the booster turn, and the second livestock battery are connected in sequence, and the current-flow voltage of the static sea-flooded power generation module is read, converted, boosted, and stored; There is an input side and an output side, and the input side is connected to the power storage, and also, the second=input: the voltage is less than the output side voltage, and the adjustable: the chain electric earth circuit can be boosted and stepped down. The operation is bidirectional energy transfer; the straight pKl〇3l7 2〇〇7/5/25 .—7 1342102 w flow/AC inverter is connected to the output side of the adjustable DC link voltage circuit, the DC/AC inverter The output side voltage of the adjustable DC link voltage circuit can be converted to an AC output voltage to supply a load. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more <RTIgt; As shown in the figure, the ocean current power generation converter with bidirectional adjustable voltage according to the first embodiment of the present invention comprises a static ocean current power generation module 1, a maximum power adjustment boost converter 2, a battery 3, and an adjustable The DC link voltage circuit 4, the DC/AC inverter 5, a load 6 and at least one microcontroller 7. h Please refer to FIG. 1 again, the static current power generation module 1 is arranged under the sea level, which can induce a DC voltage relative to the moving speed of the current, and the DC voltage is an unstable DC voltage, so The converter is required to be boosted, stepped down, and converted to generate a stable AC output voltage; one of the input terminals of the maximum power adjusted boost converter 2 is connected to the static current power generation module 1 and The DC voltage is converted into a first DC voltage, and the first DC voltage is higher than a DC voltage of the static current power generation module; the battery 3 is connected to an output side of the boost converter 2 of the maximum power adjustment, and Receiving the first DC voltage to accumulate power; one input side of the adjustable DC link voltage circuit 4 is connected to the output side of the battery 3 and the boost converter 2 of the maximum power adjustment, and is converted to generate a second DC voltage; the DC/AC inverter 5 is connected to the adjustable straight PK10317 2007/5/25 — 8 — 1342102 < one of the output side of the streamline voltage circuit 4, the DC/AC inverter 5 can be connected The second DC voltage, the DC/AC inverter 5 can convert the second DC voltage to the AC output voltage to supply the load 6; the microcontroller 7 can control the maximum power adjustment boost converter 2 The adjustable DC link voltage circuit 4 and the DC/AC inverter 5 are configured to generate the first DC voltage, the second DC voltage, and the AC output voltage. Referring to FIG. 1 again, the first DC voltage of the boost converter 2 of the maximum power adjustment is smaller than the second DC voltage of the adjustable DC link voltage circuit 4, and therefore, in the selection of the capacity of the battery 3 Smaller capacitors can be used, such as a 36 volt battery, which saves on device cost and design flexibility. , -] Referring again to FIG. 1, the maximum power adjustment boost converter 2 includes an inductor 21, a diode 22, a power electronic switch 23, and a capacitor 24. One end of the inductor 21 is connected to the positive end of the static current power generation module 1, and the other end of the inductor 21 is connected to one end of the diode 22 and the power electronic switch 23; the diode 22 The other end is connected to one end of the capacitor 24 and the battery 3; the other end of the power electronic switch 23, the capacitor 24 and the battery 3 is connected to the negative end of the static current power generation module 1. The power electronic switch 23 can be controlled by the micro-controller to turn on and off, and boost the DC voltage of the static current power generation module 1 to generate the first DC voltage, and the battery 3 Charging. Please adjust the DC key voltage circuit 4 to include a first set of power electronic switch series circuit 41, a second set of power electronic PK10317 2007/5/25 1342102 4 switch series circuit 42, An inductor 43, an input capacitor C1 and a voltage stabilizing capacitor C2. The first group of power electronic switch series circuit 41 is formed by a first power electronic switch T1 and a third power electronic switch T3 connected in series; the second group of power electronic switch_connected circuit 42 is composed of a second power electronic The switch T2 and a fourth power electronic switch 4 are connected in series. Each of the power electronic switches T1 to T4 is connected in parallel with a flywheel diode D1 to D4, respectively. The first set of power electronic switch series circuit 41 and the second set of power electronic switch series circuit 42 together form a two-bridge full-bridge structure. Please refer to FIG. 1 again, the series connection of the first power electronic switch T1 and the third power electronic switch T3 of the adjustable DC link voltage circuit 4 has a first output end; the second power electronic switch T2 And the series connection of the fourth power electronic switch T4 has a second output. One end of the inductor 43 is connected to one end of the input capacitor C] and the battery 3, and the other end of the inductor 43 is connected to the second output end. In addition, the other end of the input capacitor C1 is connected to the battery 3 One end is connected to the first output end and the other end of the battery 3. Referring to FIG. 1 again, the DC/AC inverter 5 is composed of a third group of power electronic switch series circuits 51, a fourth group of power electronic switch series circuits 52, and a fifth group of power electronic switch series circuits 53. composition. The third group of power electronic switch series circuit 51 is formed by two power electronic switches Q1 and Q4 - connected in series, and has a third output end in series connection; the fourth group of power electronic switch series circuit 52 is respectively composed of two A power electronic switch Q3 and Q6 are connected in series, and a series connection has a fourth output end; similarly, the fifth group of power electronic switch series circuit 53 is also respectively composed of PK1Q317 2007/5/25 --10 — 1342102 4 Two power electronic switches Q2 and Q5 are connected in series, and a series connection has a fifth output end. Each of the power electronic switches Q1 to Q6 is connected in parallel with a flywheel diode (not shown). The third, fourth and fifth sets of outputs of the DC/AC inverter 5 are connected to a load, such as a DC brushless motor having 48 volts. Referring again to Fig. 1, the DC/AC inverter 5 is composed of the third group, the fourth group, and the fifth group of power electronic switches 51 to 53 to form a three-bridge full-bridge structure. The DC/AC inverter 5 can perform switching control of a 120-degree six-step square wave by the microcontroller 7. That is, only two power electronic switches are turned on at a time, and the order of their conduction is Q1 and Q2 in turn; Q3 and Q2 are on; Q3 and Q4 are on; Q5 and Q4 are on; Q5 and Q6 are on; Ql Q6 is turned on. Thereby, the DC/AC inverter 5 can convert the second DC voltage into the AC output voltage to supply the load 6 for use. j] Please refer to FIGS. 2A and 2B, which discloses a current flow direction in which the battery 3 supplies electric energy to the voltage stabilizing capacitor C2 according to the first embodiment of the present invention, and the adjustable DC link voltage circuit 4 operates as a booster. mode. More specifically, since the voltage of the terminal of the battery 3 is less than the voltage of the terminal of the voltage regulator capacitor C2, the boosting operation must be performed by the adjustable DC link voltage circuit 4, and then the DC/AC inverter is used. The operation of the device 5 can supply the voltage on the voltage stabilizing capacitor C2 (i.e., the boosted voltage) to the load 6 for use of power supply. At this time, the microcontroller 7 can control the first power electronic switch 1 and the second power electronic switch T2 to operate in an open state; the third power electronic switch T3 is operated to be in a continuously conducting state;
PK10317 2007/5/25 —II I342102 四電力電子開關T4則進行脈波寬度調變〔PWM〕之控制 。然而，由於該PWM之控制，使得該第四電力電子開關 T4存在導通及斷開交替的狀態。 請再參照第2A圖所示，當該第四電力電子開關丁4藉 由該PWM的控制而呈斷開狀態時，該蓄電池3提供電能 依序流經該電感器43、飛輪二極體D2、穩壓電容器C2及 該第三電力電子開關T3，最後回到該蓄電池3之負端。 請再參照第2B圖所示，當該電力電子開關T4藉由該 PWM的控制而呈導通狀態時，該蓄電池3提供電能依序流 經該電感器43、第四電力電子開關T4及第三電力電子開 關T3，最後回到該蓄電池3之負端。因此，藉由上述的操 作，可在該穩壓電容器C2上建立該負載6所需之電壓。 ;; 請參照第3A及3B圖所示，當該負載6操作成發電機 二i 模式時，電流將由該穩壓電容器C2回流至該蓄電池3，其 揭示本發明第一實施例由該穩壓電容器C2朝該蓄電池3 提供電能之電流流向，此時該可調直流鏈電壓電路4操作 成降壓模式。該微控制器7控制該第一電力電子開關T1 及第四電力電子開關T4操作為斷開之狀態；該第三電力 電子開關T3操作成持續導通之狀態；而該第二電力電子 開關T2則進行PWM之控制。因此，藉由上述的操作，可 對該蓄電池3進行充電的動作。 請再參照第3A圖所示，當該第二電力電子開關T2藉 由該PWM的控制而呈導通狀態時，該穩壓電容器C2提供 電能依序流經該電力電子開關T2、電感器43、蓄電池3 PK10317 2007/5/25 12 — 及第三電力電子開關T3，芒你厂| μ 一端〇 取後回到該穩壓電容器C2之另 請再參照第3Β圖所示，當該 由該觸的控制而呈斷批態關^ 必須保持連、績，因此，該電感器4 ' Θ 、笔机 ，此時，該電流的流動方向二二進行電流的放電動作 依序流經該蓄電池3、第：二自^感器43之一端流出， D4，再回到該電感器43^力1子開關丁3及飛輪二極體 〜〈力一端。 請參照第4圖所示，苴揭 雙向可調電壓之海流發電轉::本;具有 二=例於該可調直流鏈電壓電路4及二二： 之間係進一步並聯設置—市電供鹿 。。C2 元8係作為當該靜態式海流發電ί組^法 量時〔例如海流流速低落時〕，該市電二=;二電 該具有雙向可調電壓之海流义: 併入 、， 同時對該蓄電池3 載:。亚玄直流7交流逆變器5之操作提供電能予該負 一 f再參照第4圖所示，本發明第二實施例之市電供鹿 早兀8係包含一變壓器81及一整流器82 : 8^1811、—次級線圈812及一隨比，該1 線圈 連接該整流器82,因此該 μ 及正抓為82可將市電電壓〔MOV或220V之雨 二電二之電隸’例如利用該變心 牛马+壓，如此，該整流器S2可選用較低的耐壓額 PK10317 2007/5/25 一 13 —· 弋的二極體進行半壓的操 、， 以供應該穩壓電容器C2、，通對應轉楨出一直流電壓， 态81之次級線圈<、斤而之電壓。在此，由於該變壓 812之交流電壓有效值與;1父流電壓，因此該次級線圈 較佳為，2。 人、預5泛電壓值之直流電壓之比值 如上所述，相較於習 機械結構及發電機進行於命'〜發電轉換器僅利用簡單的 ，進而導致發電效率不彰】未具有任何轉換器之設計 ，本發哨藉㈣可調直a ^ I"^定的情況發生等缺點 便該蓄電池3及穩電路4找計及操作’以 =，于能量的雙向傳遞，其確實可提高發電效率及蓄電 =之使用壽命，同時亦可選擇較小額定容量之蓄電池3， 因此可進一步增加設計的彈性。 雖然本發明已利用上述較佳實施例揭示，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 和範圍之内，相對上述實施例進行各種更動與修改仍屬本 發明所保護之技術範疇，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。 PK10317 2007/5/25 14 —' 1342102 . 2 最大功率調整之升壓轉換器 21 電感器 22 二極體 23 電力電子開關 24 電容器 3 蓄電池 4 可調直流鏈電壓電路 41 第一組電力電子開關串聯電路 42 第二組電力電子開關串聯電路 43 電感器 5 直流/交流逆變器 51 第三組電力電子開關串聯電路 52 第四組電力電子開關串聯電路 53 第五組電力電子開關串聯電路 6 負載 7 微控制器 8 市電供應單元 81 變壓器 811 主線圈 812 次級線圈 82 整流器 C1 輸入電容器 C2 穩壓電容器 T1 第一電力電子開關 T2 第二電力電子開關 T3 第三電力電子開關 T4 第四電力電子開關 D1至D4 飛輪二極體 Q1至Q6 電力電子開關 PK10317 2007/5/25 —16 -PK10317 2007/5/25 —II I342102 The four power electronic switch T4 is controlled by pulse width modulation (PWM). However, due to the control of the PWM, the fourth power electronic switch T4 has a state of being turned on and off alternately. Referring to FIG. 2A again, when the fourth power electronic switch 4 is turned off by the PWM control, the battery 3 supplies electric energy sequentially through the inductor 43 and the flywheel diode D2. The voltage stabilizing capacitor C2 and the third power electronic switch T3 are finally returned to the negative end of the battery 3. Referring to FIG. 2B again, when the power electronic switch T4 is turned on by the control of the PWM, the battery 3 supplies electric energy sequentially through the inductor 43, the fourth power electronic switch T4, and the third. The power electronic switch T3 finally returns to the negative end of the battery 3. Therefore, by the above operation, the voltage required for the load 6 can be established on the voltage stabilizing capacitor C2. Referring to Figures 3A and 3B, when the load 6 is operated in the generator mode, current will be recirculated from the voltage regulator capacitor C2 to the battery 3, which discloses the first embodiment of the present invention. Capacitor C2 supplies current to the battery 3 for current flow, at which time the adjustable DC link voltage circuit 4 operates in a buck mode. The microcontroller 7 controls the first power electronic switch T1 and the fourth power electronic switch T4 to operate in an off state; the third power electronic switch T3 operates to be in a continuous state; and the second power electronic switch T2 Perform PWM control. Therefore, the operation of charging the battery 3 can be performed by the above operation. Referring to FIG. 3A again, when the second power electronic switch T2 is turned on by the control of the PWM, the voltage regulator capacitor C2 supplies power through the power electronic switch T2 and the inductor 43 in sequence. Battery 3 PK10317 2007/5/25 12 — and the third power electronic switch T3, Mang your factory | μ one end is taken back to the voltage regulator capacitor C2, please refer to the third figure, when the touch The control is turned off and the mode is closed. ^The inductor must be kept connected. Therefore, the inductor 4 ' Θ , the pen machine, at this time, the current flow direction of the current discharge action of the current flows through the battery 3, The first: two from the sensor 43 outflow, D4, and then back to the inductor 43 ^ force 1 sub-switch D 3 and flywheel diode ~ < force end. Please refer to Figure 4, to reveal the two-way adjustable voltage of the ocean current power generation:: this; with two = in the adjustable DC link voltage circuit 4 and two: between the further parallel setting - the city power supply deer. . C2 element 8 is used when the static current generation unit is used (for example, when the current velocity is low), the utility power is two; the second power has the bidirectional adjustable voltage of the ocean current meaning: incorporation, and at the same time the battery 3 contains: The operation of the Yaxuan DC 7 AC inverter 5 provides power to the negative one. Referring again to FIG. 4, the utility model of the second embodiment of the present invention provides a transformer 81 and a rectifier 82: 8 ^1811 - a secondary coil 812 and a ratio, the 1 coil is connected to the rectifier 82, so the μ and the positive grab 82 can be used to change the mains voltage [MOV or 220V rain 2 electric two] Cattle horse + pressure, so, the rectifier S2 can be used with a lower voltage withstand voltage PK10317 2007/5/25 - 13 · diode for half-pressure operation, to supply the voltage regulator capacitor C2, Turning out the constant current voltage, the secondary coil of state 81 <, the voltage of the pound. Here, the secondary coil is preferably 2 because of the rms voltage of the transformer 812 and the parent voltage. The ratio of the DC voltage of the human and the pre-5-voltage value is as described above. Compared with the mechanical structure and the generator, the power generation is only used, and the power generation efficiency is not good. The design, the whistle of the whistle (four) can be adjusted straight a ^ I " the situation of the situation and other shortcomings, the battery 3 and the stability circuit 4 to find and operate 'to =, in the two-way transmission of energy, it can improve power generation efficiency And the storage life = the life of the battery, but also the battery 3 with a smaller rated capacity, which can further increase the flexibility of the design. While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims. PK10317 2007/5/25 14 —' 1342102 . 2 Maximum power boost converter 21 Inductor 22 Diode 23 Power electronic switch 24 Capacitor 3 Battery 4 Adjustable DC link voltage circuit 41 The first group of power electronic switches in series Circuit 42 Second Group Power Electronic Switch Series Circuit 43 Inductor 5 DC/AC Inverter 51 Third Group Power Electronic Switch Series Circuit 52 Fourth Group Power Electronic Switch Series Circuit 53 Fifth Group Power Electronic Switch Series Circuit 6 Load 7 Microcontroller 8 Mains supply unit 81 Transformer 811 Main coil 812 Secondary coil 82 Rectifier C1 Input capacitor C2 Voltage regulator capacitor T1 First power electronic switch T2 Second power electronic switch T3 Third power electronic switch T4 Fourth power electronic switch D1 To D4 flywheel diode Q1 to Q6 Power electronic switch PK10317 2007/5/25 —16 -