M442894 五、新型說明： 【新型所屬之技術領域】 本創作提供-種節能式故電加工系統，其是以電能轉換作用 來移除工件的加工機有關。 【先前技術】 習知的放電加工系統1G如第1圖所示’其主要是由-電源 11直接供應電力予-電極12，使電極12導電並與加工工件13間 鲁絕緣破壞’形成高溫熱融侵#工件以進行加工，而一般更會配合 限机電阻14控制輸出電流大小，藉由限流電阻14降低由電源^ 輸出的電流再提供給該電極12進行加工，而限流雜14會消耗 6〇/。以上的m轉換為熱能而散失由此可知，當電源11輸出 的電流流經雜流電阻14後，該限流電阻14直接消耗電能使輸 出的電流達到預設值，而限流電阻14消耗電能的過程使電流在沒 有被充分利用的情泥下損失，亦即，以此控制電流量大小的方式 #是完全將電力作沒有效能的消耗，而造成能源浪費之問題；有鑑 於此，本創作人潛心構思並更深人研究，終於創作出—種節能式 放電加工系統。 【新型内容】 本創作提供—種節能式放電加工系統，其主要目的是能充分 利用能源，於相同的加工過程中達到節能的環保效益。 為達前述目的’本創作提供一種節能式放電加工系統，包含： -電源供應單元，包含—電源電性連接—回收儲能元件； 3 M442894 -電流控制輸出單元，電性連接該電源供應單元，且該電流 控制輸出單元具有H侧關、—控制儲能元件以及一電流 輸出流向控制耕’該電流控制輸出單元接收該電源供應單元輸 入之電流並㈣輸出加工所需電流，並將電能_儲存於該控制 儲能70件’而該紐輸歧向控航件_電流輸出方向； 一加工單元，包含一加工電極及加工工件相對設置該加工 電極電性連接該電紐織料元，#該加工電歸近該加工工 件’該加工電極與該加工工件間絕緣破壞進行放電加工； 餘月b及收單元，電性連接該加卫單元的加卫玉件與該電流 控制輸出單元，且該餘驗收單元具有一第—雜流向控制元 件、-餘能儲能元件以及—第二餘能流向控制元件，該第一餘能 流向控制70件電性連接該加工卫件及該餘能儲能元件，而該第二 餘能流向控制元件再電性連接該餘能儲能元件；以及 月b*里回送單元，電性連接該餘能吸收單元及該電源供應單 兀之間’且該回送單元包含—第二控侧關以及—能量回送 肌向控制7L件’該第二控侧關電性連接於該加卫工件與該餘能 吸收單元的第二餘能流向控制元件之間，而該能量回送流向控制 元件則電性連接於該餘能魏單元的第-餘能流向㈣元件及該 電源供應單元與第―控则關之間。 藉由該電流控制輸出單元控制輸出的電流大小，使輸出之電 /爪幻又醜伽進行加工，明_部份電能於此儲存，電流 大J至A疋值時止電源供應單元供應電流，轉由儲存的電能繼 4 M442894 續提供電流輸出使用’如此能充分利用能源，完全不會有能源的 無謂耗損，且於加工周期結束後又能將剩餘能源儲存於該餘能吸 收單元，並藉由能量回送單元回送至電源供應單元回收再使用， 能確實達到節能環保之效。 【實施方式】 為使貴審查委員對本創作之目的、特徵及功效能夠有更進一 步之瞭解與認識’以下茲請配合【圖式簡單說明】詳述如后： ⑩ 本創作節能式放電加工系統的較佳實施例如第2至5圖所 示，包含： 一電源供應單元20，包含一電源21電性連接一回收儲能元 件22 ’該回收儲能元件22為電容； 一電流控制輸出單元3〇，電性連接該電源供應單元2〇，且該 電流控織出單元30具有-第-控制開關3卜一控制儲能元件 32以及:一電流輸出流向控制元件33，該電流控制輸出單元30接 _收該電源供應單元20輸入之電流並控制輸出加工所需電流，儲能 凡件32限制電流增加的速度，並同時作電能儲存，而該電流輸出 流向控制元件33控制電流輸出方向，本實施例中之該控繼能元 件32為電感與線路上的雜散電^，而該第一控制開目&可為雙 接面電晶體(BJT)、金氧半場效電晶體(MOSFET)或閘極絕緣雙接面 電晶體（IGBT); -電流感測器40，並接於電流控制輸出單元％之後，並感 測由該電流控制輸出單元30輸出的電流大小； 加工單元50,包含一加工電極51及加工工件52相對設置， =電極51電性連接該電流控制輸出單元3〇,且將電流控制輪 出早凡3Q輸出之電流供給該加卫電極5卜使該加工電極51靠近 該加工工件52 ’職加工電極51與該加工工件52間絕緣破壞而 能進行放電加工； 一餘能吸收單元即，電性連接該加工單it 50的加jl工件52 與該電流控制輸出單元30的控繼能元件32，且該餘能吸收單元 6〇具有第一餘能流向控制元件61、一餘能儲能元件62以及一 第餘fb々iL向控制元件63,該第一餘能流向控制元件61電性連接 s加件52及該餘能儲能元件62 ’而該第二餘能流向控制元件 63再電性連接該餘能儲能元件62以及該控制儲能元件32，且各 餘能流向控制元件6卜63控制電流由加工讀52流向該電流控 制輸出單元30，該餘能儲能元件62為電容； 一能量回送單元70，電性連接該餘能吸收單元6〇及該電源 供應單元20之間，且該能量回送單元7〇包含一第二控制開關71 以及一能量回送流向控制元件72,該第二控制開關71電性連接於 該加工工件52與該餘能吸收單元60的第二餘能流向控制元件63 之間’而該能量回送流向控制元件72則電性連接於該餘能吸收單 疋60的第一餘能流向控制元件61及該第一控制開關31之間，該 能量回送流向控制元件72控制電流流向該電源供應單元20，本實 施例之各流向控制元件33、61、63、72為二極體，而該第二控制 開關71可為雙接面電晶體(bjt)、金氧半場效電晶體(M〇SFET)或 M442894 閘極絕緣雙接面電晶體（IGBT);以及 一控制器80，電性連接該第一控制開關3卜該電流感測。。 40以及該第二控制開關71。 ' ^為 以上為本創作節能式放電加工純之結構隱，而運作方式 首先是由該控制器80控制起始運作，該控制器8〇於常熊起始^ 轉時先控制該第一控制關31 *該第二控制關71料兩$ 通的開啟狀態，且該加工單元50的加工電極51及該加工工件於 •靠近，使該加工電極51及該加工工件52間的絕緣破壞，則如第2 圖所示，則電流由該電源供應單元20的電源21輸出，並會依序 經由該第一控制開關31、該控制儲能元件32、該電流輸出流向控 制元件33、該加工電極51及該加工工件52，最後流回電源21形 成完整的電流迴路，且電流流經該電流控制輸出單元3〇時，該電 流控制輸出單元30的控制儲能元件32的特性是導通時阻抗由大 變小，限制輸入的電流由小漸漸變大，流經控制儲能元件32的電 鲁》IL(輸出的電流)亦相同’儲存的電能同時亦由小變大，利用此特 性來作電流限制與儲能，便不須耗能的電阻來作電流限制，儲能 元件32開始釋放電能時，輸出的電流則由大漸漸變小，儲存的電 能同時亦由大變小，所以第一控制開關31開啟導通時電流開始輸 出’儲能元件32同時儲能，第一控制開關31關閉斷路時，儲能 元件32儲能開始釋放電能，繼續提供電流輸出，故加工所需電流 由電源供應單元20與控制儲能元件32交替供應電能形成一個定 電流源； 7 M442894 此時’該電流感測器40感測該電流控制輸出單元3〇輸出的 電机’备該電流控制輸出單元3〇輸出的電流達到預設值時，該預 :值可由該控制器80視需求設定，該控制器80接收該電流感測 器40感測電流到達預設值時即能控做變運作狀態，且是如第3 圖所不’該控制器80接著控制該第一控綱M 31兩端斷開成為 關閉斷路狀態'，而該第二控制開關71仍然維持開啟導通狀態，如 此’使該電源21流出的電流無法通過該電流控制輸出單元3〇，而 於此時該加丄單元50仍維持加讀態，則該加工單it 5〇所需加 電机則改變成由該電流控制輸出單元3〇的控制儲能元件32提 供此時該控儲能元件32即能將前述儲存之電能輸出提供使 用且該控制儲能元件32輸出之電流依序經由電流輸出流向控制 元件33、加工電極5卜該加卫工件52、該第二控制_ 71及該 第-餘能流向控制元件63,最後流回該控制儲能元件32形成電路 迴路’此時’該加ji單元50制運作加I，職控獅能元件32 内儲存之電能將逐漸下降，輸出的電流亦逐漸下降，同樣地，該 電流感測器4G持續感測該電流控制輸出單元3Q輸出的電流當 該魏感測器40感測之電流值達到由控制器8〇所設定之下限值 時’該控制器80接著作下-個狀態的控制；且是又控制該第一控 制開關31成為兩端導通的開啟狀態，亦即，控制回復至如第2圖 所示之狀態’如此不斷地循環控制進行加工，達到限流、儲能及 儲能再利用之目的； 接著，當所設定之加工週期已完成時，則可由該控制器8〇控 M442894 制該第一控制開關31及該第二控制開關71成為兩端斷開之關閉 狀態，如第4圖所示，電流由該控制儲能元件32流出後，依序經 由該電流輸出流向控制元件33、該加工電極51、該加工工件52、 該第一餘能流向控制元件6卜該餘能儲能元件62以及該第二餘能 流向控制元件63，最後流回該控制儲能元件32形成迴路，電流流 經該餘能儲能元件62時會由該餘能儲能元件62吸收儲存，儲存 未使用之電能； • 接著，當該餘能儲能元件62儲存未使用之電力後，接著接續 控制該第-控姻關31關閉，而該第二控制開關71 啟，如第5 圖所不，此時該餘能儲能元件62内儲存之電能流出，並經由能量 回送流向控制元件72流向該電源供應單元2〇的回收儲能元件 22 ’且再流向該第二控綱關71最後流回該餘麟能元件⑽形 成迴路，此迴路即能將加工後所剩餘之能量回送至電源供應單^ 20，能完全避免能源的無謂耗損。 • 自上述可知，本創作於由電源供應單元2〇輸出電流時即進行 限流與儲能’當電流大小_設定時，轉換由控繼能元件犯繼 續供應加工電流，兩者交#提供電能，完全不會產生能源浪費之 問題，且於加X周期的最後還能將剩餘之電能回送至電源供應單 兀20，使整個加工流程完全不會產生能源的浪冑，在相同的加工 周期不僅能降低能源需求’降低加工成本，提高經濟效益 確實地符合環保訴求。 & 另外’除了上述實施例之外，本創作還有其他的實施方式如第6 M442894 圖所示，當該電源供應單元20的極性相反時，亦能藉由將各流向 控制元件31、33、61 ' 63 ' 71、72作反向的設置，如此亦能達成 與上述完全相同之效；再者’如第7圖所示，為了降低該餘能儲 能元件62輸出電流至該回收儲能元件22的電流湧浪，因此可於 該能量回送單元70的能量回送流向控制元件72及該回收儲能元 件22之間設置串聯的一穩流電感73及一穩流流向控制元件74， 藉此便能有效降低由該餘能儲能元件62輸出電流的湧浪現象；還 有，上述實施例是以該控制器8〇配合該電流感測器4〇以感測到 的電流作為控制基礎進行控制，而也可以不設置該控制器及該 電流感測器40 ’如第8圖所示，直接設定該第一控制開關31及該 第二控制開關71關啟動料間也可達成與上述實施例完全相同 之目的及功效。 再者’更此如第9圖所示增加設置一預充電單元9〇，該預充 電單元9G包含-第-繼電器開關91、第二繼電器開關92以及一 充電電阻93,該第—繼電挪_電性連接設置於該第二控制開 關η及該第二餘能流向控制元件63之間，該第二繼電器開關犯 電性連接設置於雜量回送流向㈣元件72及該第-控制開關 31之間，而該充電電組93則設置於該第一控制開關 31及該第二 繼電器開關92之間’該預充電單元⑽可對該餘能儲能元件預 先充電’而預先充電的方法是在加H該第—繼電韻關9卜 第二繼樣侧92依序導通，使電流由該電源供應單元20經過 該充電電阻93、第二繼電92、餘能儲能元件62及該第- M442894 繼電器關91，最後相到該電源供應單元20，對該餘能儲能元 :62作触充電’ s該餘能儲能元件62的電難近該電源供應 開M Q的電I ?尤可斷開該第二繼電器開關92及該第一繼電器 :1，藉由簡易的元件就可達到對該餘能儲能元件62預先充 1 【圖式簡單說明】 圖 為習知放電加工系統的示意圖。 第2圖 為本創作節能式放電加工系統的實施例示意圖，且是 由電源供應單元供應電流進行加工的狀態。 第3圖 為本創作節能式放電加工系統的實施例示意圖’且是 由控制儲能元件32供應電流進行加工的狀態。 第4圖 為本創作節能式放電加工系統的實施例示意圖，且是 加工周期結束，儲存餘能之狀態。 第5圖 為本創作節能式放電加工系統的實施例示意圖，且是 將餘能回送至電源供應單元的狀態。 第6圖 為本創作節能式放電加工系統的電源極性相反之實施 例示意圖。 第7圖 為本創作節能式放電加工系統的實施例示意圖，且是 能避免發生電流湧浪的實施例。 第8圖 為本創作節能式放電加工系統的實施例示意圖，且是 不設置電流感測器及控制器之示意圖。 第9圖 為本創作節能式放電加工系統的實施例示意圖，且是 增加設置預充電單元的示意圖。 【主要元件符號說明】 《習知技術》 電源11 加工工件13 放電加工系統10 電極12 12 M442894 限流電阻14 《本創作》 電源供應單元20 回收儲能元件22 第一控制開關31 電流輸出流向控制元件33 加工單元50 加工工件52 第一餘能流向控制元件61 第二餘能流向控制元件63 第二控制開關71 穩流電感73 控制器80 第一繼電器開關91 充電電阻93 電源21 電流控制輸出單元30 控制儲能元件32 電流感測器40 加工電極51 餘能吸收單元60 餘能儲能元件62 能量回送單元70 能量回送流向控制元件72 穩流流向控制元件74 預充電單元90 第二繼電器開關92 13M442894 V. New description: [New technical field] This creation provides an energy-saving electric machining system, which is related to the processing machine that removes the workpiece by electric energy conversion. [Prior Art] As shown in FIG. 1 , the conventional electric discharge machining system 1G mainly supplies power to the electrode 12 directly from the power source 11 to make the electrode 12 electrically conductive and insulate with the workpiece 13 to form a high temperature. The hot melt invades the workpiece for processing, and generally controls the output current with the limit resistor 14 , and the current output from the power source is reduced by the current limiting resistor 14 and then supplied to the electrode 12 for processing, and the current limit is 14 Will consume 6 〇 /. The above m is converted into thermal energy and is lost. Therefore, when the current output from the power source 11 flows through the shunt resistor 14, the current limiting resistor 14 directly consumes electric energy so that the output current reaches a preset value, and the current limiting resistor 14 consumes electric energy. The process of causing the current to be lost without being fully utilized, that is, the way to control the amount of current is to completely consume electricity as an inefficient consumption, resulting in waste of energy; in view of this, the creation People have conceived and deepened their research, and finally created an energy-saving EDM system. [New Content] This creation provides an energy-saving EDM system whose main purpose is to make full use of energy and achieve energy-saving environmental benefits in the same processing. In order to achieve the above objectives, the present invention provides an energy-saving electric discharge machining system comprising: - a power supply unit comprising - a power supply electrical connection - a recovery energy storage component; 3 M442894 - a current control output unit electrically connected to the power supply unit, And the current control output unit has an H-side switch, a control energy storage component, and a current output flow control flow. The current control output unit receives the current input by the power supply unit and (4) outputs a current required for processing, and stores the electric energy_ The control energy storage is 70 pieces' and the new input is directed to the control unit _ current output direction; a processing unit includes a machining electrode and the machining workpiece is oppositely disposed, the machining electrode is electrically connected to the electric button woven material element, # The machining electric power is close to the processed workpiece, and the electrical insulation between the machining electrode and the machining workpiece is subjected to electrical discharge machining; the remaining moon b and the receiving unit are electrically connected to the reinforcing jade piece of the curing unit and the current control output unit, and the current is The remaining acceptance unit has a first-heterogeneous flow control element, a residual energy storage element, and a second residual energy flow control element, the first residual energy flow Controlling 70 pieces of electrical connection between the processing guard and the residual energy storage component, and the second residual energy flow is electrically connected to the residual energy storage component; and the returning unit in the month b* is electrically connected Between the energy absorbing unit and the power supply unit 且 and the loopback unit includes a second control side switch and an energy return muscle direction control 7L piece. The second control side is electrically connected to the urging workpiece and the The second residual energy of the residual energy absorbing unit flows between the control elements, and the energy return flow control unit is electrically connected to the first energy component of the residual energy unit to the (four) component and the power supply unit and the first control Between the off. The current control output unit controls the magnitude of the output current, so that the output power/claw is ugly and ugly, and the power is stored in the power source. When the current is large J to A, the power supply unit supplies the current. Transferring stored energy follows 4 M442894 Continued to provide current output using 'This can make full use of energy, there is no unnecessary loss of energy, and after the end of the processing cycle, the remaining energy can be stored in the residual energy absorption unit, and borrow It is returned to the power supply unit for recycling and reuse by the energy return unit, which can effectively achieve energy saving and environmental protection. [Embodiment] In order to enable your review committee to have a better understanding and understanding of the purpose, characteristics and efficacy of this creation, please refer to the following [detailed description of the drawings] as follows: 10 The creation of energy-saving EDM system The preferred embodiment, as shown in the second to fifth embodiments, comprises: a power supply unit 20, comprising a power source 21 electrically connected to a recovery energy storage element 22. The recovery energy storage element 22 is a capacitor; and a current control output unit 3 The power supply unit 2 is electrically connected to the power supply unit 2, and the current control fabric unit 30 has a - control switch 3 and a control energy storage element 32 and a current output flow to the control element 33. The current control output unit 30 is connected. Receiving the current input by the power supply unit 20 and controlling the current required for the output processing, the energy storage unit 32 limits the speed of the current increase, and simultaneously stores the electric energy, and the current output flows to the control element 33 to control the current output direction. In the example, the control relay element 32 is a stray electric current on the inductor and the line, and the first control opening & can be a double junction transistor (BJT), a gold oxide half field effect transistor (MOSFET) or gate insulated double junction transistor (IGBT); - current sensor 40, connected after the current control output unit %, and sensing the magnitude of the current output by the current control output unit 30; 50, comprising a processing electrode 51 and a processing workpiece 52 oppositely disposed, the = electrode 51 is electrically connected to the current control output unit 3A, and the current is controlled to output a current of the 3Q output to the auxiliary electrode 5 to make the processing The electrode 51 is adjacent to the workpiece 52 and the workpiece between the workpiece electrode 51 and the workpiece 52 is insulated and can be subjected to electrical discharge machining; a residual energy absorption unit, that is, the jl workpiece 52 electrically connected to the processing unit IT 50 and the current control The control unit 32 of the output unit 30, and the residual energy absorption unit 6 has a first residual energy flow to the control element 61, a residual energy storage element 62, and a remainder fb々iL to the control element 63, the first The remaining energy flow is connected to the control element 61 electrically connected to the s-adding member 52 and the residual energy storage element 62', and the second residual energy flowing to the control element 63 is electrically connected to the residual energy storage element 62 and the control energy storage element 32. And each residual energy flows to the control element The control current flows from the processing read 52 to the current control output unit 30, the residual energy storage element 62 is a capacitor; an energy return unit 70 is electrically connected to the residual energy absorption unit 6 and the power supply unit 20 The energy return unit 7 includes a second control switch 71 and an energy return flow control unit 72. The second control switch 71 is electrically connected to the second workpiece of the workpiece 52 and the residual energy absorption unit 60. The energy can be flowed between the control elements 63 and the energy return flow control unit 72 is electrically connected to the first residual energy of the residual energy absorbing unit 60 to the control element 61 and the first control switch 31. The flow direction control element 72 controls the flow of current to the power supply unit 20. The flow control elements 33, 61, 63, 72 of the present embodiment are diodes, and the second control switch 71 can be a double junction transistor (bjt). , a gold oxide half field effect transistor (M〇SFET) or M442894 gate insulated double junction transistor (IGBT); and a controller 80 electrically connected to the first control switch 3 for current sensing. . 40 and the second control switch 71. ' ^ is the above-mentioned creation of energy-saving EDM pure structure hidden, and the operation mode is first controlled by the controller 80 to start operation, the controller 8 first controls the first control when the Chang bear starts OFF 31 * The second control switch 71 is turned on, and the processing electrode 51 of the processing unit 50 and the workpiece are close to each other to break the insulation between the processing electrode 51 and the workpiece 52. As shown in FIG. 2, the current is output by the power source 21 of the power supply unit 20, and sequentially flows through the first control switch 31, the control energy storage element 32, the current output to the control element 33, and the processing electrode. 51 and the workpiece 52, and finally flowing back to the power source 21 to form a complete current loop, and when the current flows through the current control output unit 3, the characteristic of the control energy storage element 32 of the current control output unit 30 is that the impedance is Larger and smaller, the current limiting the input is gradually increased from small to small, and the electric current flowing through the control energy storage element 32 is the same as the current (the output current) is also the same. The stored electric energy is also increased from small to large, and the characteristic is used for current. Restriction and energy storage Therefore, when the energy storage element 32 starts to release the electric energy, the output current is gradually reduced from large to large, and the stored electric energy is also greatly reduced, so that the first control switch 31 is turned on. When the current starts to output 'the energy storage element 32 simultaneously stores energy, when the first control switch 31 is closed, the energy storage element 32 stores energy to start releasing the electric energy, and continues to provide the current output, so the current required for processing is controlled by the power supply unit 20 and the stored energy. The component 32 alternately supplies electric energy to form a constant current source; 7 M442894 At this time, the current sensor 40 senses the current output of the current control output unit 3〇, and the current output by the current control output unit 3〇 reaches a preset In the case of a value, the pre-value can be set by the controller 80 as needed. The controller 80 can control the current state when the current sensor 40 senses that the current reaches a preset value, and is as shown in FIG. The controller 80 then controls the first control M 31 to be turned off to be in the off state, and the second control switch 71 remains in the on state, thus causing the power source 21 to flow out. The flow cannot pass through the current control output unit 3〇, and at this time, the twisting unit 50 still maintains the read state, and the processing unit is changed to the current control output unit 3 The control energy storage component 32 provides that the control energy storage component 32 can provide the stored electrical energy output and the current output by the control energy storage component 32 flows to the control component 33 and the processing electrode 5 via the current output. The workpiece 52, the second control_71 and the first residual energy flow to the control element 63, and finally flow back to the control energy storage element 32 to form a circuit loop 'this time' the add ji unit 50 operation plus I, the lion The energy stored in the energy component 32 will gradually decrease, and the output current will gradually decrease. Similarly, the current sensor 4G continuously senses the current output by the current control output unit 3Q when the current sensed by the Wei sensor 40 When the value reaches the lower limit value set by the controller 8', the controller 80 controls the state of the next state; and the first control switch 31 is controlled to be turned on at both ends, that is, the control is performed. Revert to as shown in Figure 2 The state 'continuously cyclically controls the processing to achieve the purpose of current limiting, energy storage and energy storage reuse; then, when the set processing cycle has been completed, the controller 8 can control the M442894 to make the first The control switch 31 and the second control switch 71 are in a closed state in which both ends are disconnected. As shown in FIG. 4, after the current flows out of the control energy storage element 32, the current is sequentially output to the control element 33 via the current output, and the processing is performed. The electrode 51, the processed workpiece 52, the first residual energy flow to the control element 6 and the residual energy storage element 62 and the second residual energy flow to the control element 63, and finally flow back to the control energy storage element 32 to form a loop, current flow The remaining energy storage element 62 is absorbed and stored by the residual energy storage element 62 to store unused electrical energy; and then, after the residual energy storage element 62 stores unused power, the subsequent control is continued. The control gate 31 is closed, and the second control switch 71 is turned on. As shown in FIG. 5, the stored energy stored in the energy storage element 62 flows out and flows to the power supply via the energy return flow to the control element 72. single 2〇 of the recovered energy storage component 22' and then flows to the second control gate 71 and finally flows back to the Yulin energy component (10) to form a loop, which can return the remaining energy after processing to the power supply unit ^20, Can completely avoid the unnecessary wear and tear of energy. • As can be seen from the above, the present invention performs current limiting and energy storage when the current is supplied by the power supply unit 2 ' 'When the current magnitude _ is set, the conversion continues to supply the machining current by the control relay component, and the two deliver the energy. There is no problem of energy waste at all, and at the end of the X cycle, the remaining energy can be returned to the power supply unit ,20, so that the entire processing process will not generate energy waves at all, in the same processing cycle. Can reduce energy demand 'Reducing processing costs and improving economic efficiency are indeed in line with environmental appeals. & In addition, in addition to the above embodiments, there are other embodiments of the present invention, as shown in FIG. 6 M442894. When the polarity of the power supply unit 20 is reversed, the flow can also be directed to the control elements 31, 33. , 61 ' 63 ' 71, 72 for the reverse setting, so can achieve the same effect as above; in addition, as shown in Figure 7, in order to reduce the output energy of the energy storage component 62 to the recovery storage The current of the energy component 22 is swelled, so that a steady current inductor 73 and a steady flow flow control component 74 can be disposed between the energy return flow of the energy returning unit 70 and the recovery energy storage component 22, Therefore, the surge phenomenon of the current outputted by the residual energy storage element 62 can be effectively reduced; further, the above embodiment is based on the controller 8 〇 cooperates with the current sensor 4 〇 to sense the current as a control basis. Controlling, and the controller and the current sensor 40' may not be provided. As shown in FIG. 8, directly setting the first control switch 31 and the second control switch 71 may also achieve the above. The exact same example And efficacy. Furthermore, a pre-charging unit 9A is further provided as shown in FIG. 9. The pre-charging unit 9G includes a --relay switch 91, a second relay switch 92, and a charging resistor 93. The electrical connection is disposed between the second control switch η and the second residual energy flow to the control element 63. The second relay switch is electrically connected to the impurity return flow direction (four) component 72 and the first control switch 31. The charging power group 93 is disposed between the first control switch 31 and the second relay switch 92. The pre-charging unit (10) can pre-charge the energy storage element to be pre-charged. In the second step, the second relay side 92 is sequentially turned on, and the current is supplied from the power supply unit 20 through the charging resistor 93, the second relay 92, the residual energy storage element 62, and the The first - M442894 relay is turned off 91, and finally the power supply unit 20 is connected to the remaining energy storage element: 62. The electric energy of the energy storage element 62 is close to the power supply. In particular, the second relay switch 92 and the first relay: 1 are disconnected, by way of simplicity The component can be pre-charged to the residual energy storage component 62. [Schematic description of the drawing] The figure is a schematic diagram of a conventional electrical discharge machining system. Fig. 2 is a schematic view showing an embodiment of the energy-saving electric discharge machining system of the present invention, and is a state in which a current is supplied from a power supply unit for processing. Fig. 3 is a schematic view showing an embodiment of the creation of an energy-saving electric discharge machining system' and is a state in which current is supplied by controlling the energy storage element 32 for processing. Fig. 4 is a schematic view showing an embodiment of the creation of an energy-saving electric discharge machining system, and is a state in which the machining cycle ends and the residual energy is stored. Fig. 5 is a schematic view showing an embodiment of the energy-saving electric discharge machining system of the present invention, and is a state in which the remaining energy is returned to the power supply unit. Fig. 6 is a schematic diagram showing an embodiment of the opposite polarity of the power supply of the energy-saving EDM system. Fig. 7 is a schematic view showing an embodiment of the creation of an energy-saving electric discharge machining system, and is an embodiment capable of avoiding occurrence of current surge. Fig. 8 is a schematic view showing an embodiment of the energy-saving electric discharge machining system of the present invention, and is a schematic diagram of not providing a current sensor and a controller. Fig. 9 is a schematic view showing an embodiment of the creation of an energy-saving electric discharge machining system, and is a schematic diagram of adding a pre-charging unit. [Main component symbol description] "Knowledge technology" Power supply 11 Machining workpiece 13 EDM system 10 Electrode 12 12 M442894 Current limiting resistor 14 "This creation" Power supply unit 20 Recycling energy storage element 22 First control switch 31 Current output flow control Element 33 Machining unit 50 Machining workpiece 52 First residual energy flow to control element 61 Second residual energy flow to control element 63 Second control switch 71 Steady current inductor 73 Controller 80 First relay switch 91 Charging resistor 93 Power supply 21 Current control output unit 30 control energy storage element 32 current sensor 40 processing electrode 51 residual energy absorption unit 60 energy storage element 62 energy return unit 70 energy return flow control element 72 steady flow direction control element 74 pre-charge unit 90 second relay switch 92 13