M297821 八、新型說明： 【新型所屬之技術領域】 本創作係關於一種電動工具 種應用脈波頻寬調變控制電路控制導^門別是關於一 變壓器之次級繞組輸出電壓來對電精確由 調節充電器。 也進仃充電之電壓 【先前技術】 /傳統式手持卫具機，如··電氣鑽頭、電動起子，… 以往需要利用電源線插接於電源插座上，已經 : =式：池作為電力提供;由於手持工具機如消費 調輕薄短校小’所以在充電電池使用上主 題，近年來在環保音識::下=有廢電池污染問 訂’未來勢必將遭到市場的 淘汰，而取而代之的就是具有高能㈣度、外型也 短小的鎳氫材料電池。 、 大部分傳統的手持卫具機電池充電器僅針對錄録 電池進行充電，而無法兼顧其他材料製作而成的電池為 充電進步參閱圖四所示，為一般傳統式電池充電器 之電路方塊圖；將市電1送入整流器電路2a，經由； 流器電路2a使AC轉換成Dc，再以pWM控制電路％ 用來控制功率開關的導通與否，當功率開關導通時，輸 入電壓會供應到隔離變壓器電路4a的初級繞組上，此 時初級繞組上的電流逐漸增加並將能量儲存於其中，同 時把能量感應在變壓器電路4a的次級繞組上，持續到 M297821 電池8充電飽和為止M297821 VIII, new description: [New technology field] This is a kind of power tool application pulse wave bandwidth modulation control circuit control guide is related to the secondary winding output voltage of a transformer to adjust the accuracy of electricity charger. Also enters the charging voltage [previous technology] / traditional hand-held protective gear machine, such as · electric drill, electric screwdriver, ... In the past, the power cord was plugged into the power socket, already: = type: pool as power supply; Because the hand-held power tools such as the consumption of light and thin short and small school, so in the theme of the use of rechargeable batteries, in recent years in the environmental sounds:: = = waste battery pollution asked 'the future is bound to be eliminated by the market, and replaced by A nickel-hydrogen material battery with high energy (four degrees) and short appearance. Most of the traditional handheld device battery chargers only charge for the recording battery, but the battery that can not be made of other materials is the charging progress. See Figure 4 for the circuit diagram of the general traditional battery charger. The mains 1 is sent to the rectifier circuit 2a, the AC circuit is converted to Dc via the streamer circuit 2a, and the pWM control circuit % is used to control the conduction of the power switch. When the power switch is turned on, the input voltage is supplied to the isolation. On the primary winding of the transformer circuit 4a, the current on the primary winding is gradually increased and energy is stored therein, while energy is induced on the secondary winding of the transformer circuit 4a until the M297821 battery 8 is fully charged.
為溫度短時間升高而誤判。 、誤差值高的電壓模式下進行充 雜訊干擾，除了電壓持續偏低則 ，造成能源浪費之外，若電壓持 至v對電池的哥命將有所影響。 诗定電壓、電池進行充電，無法廣 電池，且習用手持工具機充 决疋充電電壓飽和否，故容易因 如上所述，該設計上仍有改善之空間，在本創作人潛 心研究下，配合該原有電路加以設計改良，遂提出以下具 有輸出電壓調節之充電器。 【新型内容】 本創作係關於一種具備輸出電壓調節之電動工具 充電器，其主要目的係在於利用一感測電路，使輸出電 壓得以根據充電電壓及電流的反饋誤差值進行調整。 本創作之次一目的係在於可依據變壓器次級繞組 所設定之電壓輸出值範圍，對不同規格電壓之電池進行 充電。 本創作之又一目的係在於包括有一充電器控制單 元’係設置於整體電路之終端，俾供依據該電池之規格 以及飽和容量，控制輸出電壓時間以及電流值。 本創作之再一目的係提出利用控制單元作為偵測 電池之充電狀態，在於避免以往在充電時，因充電器本 M297821 體或電池溫度急劇升高，伟、、四硌/占 利开问使/皿度偵測器送一訊號切斷充 電電路，而致充電未飽和即停止充電。 所以，根據本創作所提出之解決方式，—種具備輸 出電歷调即之電動工具充電器’依據電池規格由充電器 内部-充電電路輸出適當的電壓，該充電電路至少包括 有：濾、波器’係與輸人端相接，可除去雜訊以擷取輸入 市電特定頻率範圍之雷厭·敫口口 ^ 固之電壓，整流态，係與該濾波器相Misjudged for a short rise in temperature. In the voltage mode with high error value, the noise interference is performed. In addition to the low voltage, the energy is wasted. If the voltage is held to v, the battery life will be affected. Poetry voltage, battery charging, can not be wide battery, and the conventional hand-held power tool is full of charging voltage saturation, it is easy to be because of the above, there is still room for improvement in the design, in this creator's painstaking research, cooperate The original circuit is designed and improved, and the following charger with output voltage adjustment is proposed. [New Content] This creation is about a power tool charger with output voltage regulation. Its main purpose is to use a sensing circuit to adjust the output voltage according to the feedback error value of the charging voltage and current. The second purpose of this creation is to charge batteries of different voltages according to the range of voltage output values set by the secondary winding of the transformer. Another object of the present invention is to include a charger control unit disposed at the terminal of the overall circuit for controlling the output voltage time and current value in accordance with the specifications of the battery and the saturation capacity. Another purpose of this creation is to use the control unit as the charging state of the detection battery, in order to avoid the sudden rise of the temperature of the charger or the battery of the M297821 body during the charging, Wei, Si Si / Zhan Li asked The / detector detects a signal to cut off the charging circuit, and the charging is not saturated to stop charging. Therefore, according to the solution proposed by the present invention, the power tool charger having the output electronic calendar adjustment is outputted by the internal charging-charging circuit of the charger according to the battery specification, and the charging circuit includes at least: filtering, wave The 'connected with the input terminal can remove the noise to capture the voltage of the input frequency of the mains and the voltage of the port, the rectification state, and the filter
接係將輸入又机電壓轉換為直流電壓；脈波頻寬調變 控=電路，▲係連接於該整流器後端，由輸人電壓控制脈 波見度凋、交’並可接收一訊號來改變脈寬而控制功率開 關的on/off ,、义壓裔，包括有初級繞組以及次級繞組， 該初級繞組與脈波頻寬調變控制電路電性相接，使輸入 =麼將供應到初級繞組上，且逐漸增加並將能量儲存於 其中：以及感測電路，該感測電路係為誤差放大器以及 光隔離器所組成，係耦合於脈波頻寬調變控制電路上， :方面藉由改變脈波寬度來控制導通時間，以精確由變 "、如之人級繞組輸出電壓，另一方面截取部分輸出電壓 /、預功電壓做比較，並將兩者之誤差值回授以調整電 以下將配合圖式說明本創作的實施例，下述所列 牛的貫轭例係用以闡明本創作，並非用以限定本創作 之範圍’任何熟習此技藝者，當可做些許更動與潤飾， 口此本創作之保護範圍當視後附之申請專利範圍所界 定者為準。 M297821 【實施方式】 視圖4關—所示’為手持電動工具機的外觀部份透 圖。—般手持電動工具機9主要為一本體91及 所構成，該本㈣係具有_握持部叩供操作者 、進行工作，握持部911之底部具有一開口 912 ;底 座92則具有一插梢921可由本體9ι之開口犯置入而 與本體91結合，而底座92内部包括有—可充電電池 8’該工具機9即由底座92内的充電電池8提供運作電 力。 私 當電池之電力粍盡，則操作者即可將該底座92與 本體91刀雔，如圖圖二所示，係顯示底座％與充電器 93之待結合狀態。本創作充電器93之本體具有一凹槽 931可供底座92之插梢921置入，使充電器93及電池 8為電氣相接狀態。 請參閱圖三所示，為本創作電動工具充電器之充電 電路方塊圖，本充電電路主要包括由：—濾波器電路 7、一整流器電路2、一脈波頻寬調變控制電路$ (P WM )、一變壓器電路4、一感測電路5以及一充電 器控制單元6所組成；該濾波器電路7與輸入端市電i 相接，可除去雜訊以擷取輸入市電丨特定頻率範圍之穩 定電壓；該整流器電路2係與該濾波器電路7相接，係 將輸入交流電壓轉換為直流電壓；脈波頻寬調變控制電 路3，係接於該整流器電路2後端，由輸入電壓控制脈 波I度调受，並可接收一訊號來改變脈寬而控制功率開 M297821 ff;變壓器電路4，包括有初級繞組以及次級 及初級繞組與脈波頻寬調變控制電路3電性相 二使輸入電壓將供應到初級繞組上，且逐漸增加並將 f里储存，其中；以及感測電路5,該感測電路5係為 次差放大⑤51以及光隔離器52所組成，係柄合於脈波 頻，調變控制電路3上’―方面藉由改變脈波寬度來控 :導通二夺間’以精確由變壓器電路4之次級繞組輸出電 疋另彳面截取部分輸出電壓與參考電壓做比較，並 將兩者之誤差值回授，改變脈波寬度以調整電屢。而光 隔離器52能夠防止突波電壓直接衝擊電路造成損毀元 件，亦作為協助回授信號溝通用。 •在本實施例中，變壓器電路4次級繞阻將依據脈波 頻覓調變控制電路3切換功率開關（如f晶體，圖未示） 產生輸出電流Lo ’該輸出電流L〇經由次級繞阻之對 接地電容充電而|生輸出電壓V。。感測電路5操取一 部份輸出電壓Lo,誤差放大器51將此擷取的輸出電壓 Lo與欲得之參考電壓兩相比較，而輸出一誤差信號s 至脈波頻寬調變控制電路3,據以調整脈波寬度來控制 功率開關的導通時間（Duty Cycle)。 而本創作之電動工具充電座在感測電路根據參考 電壓以及輸出電壓所產生的誤差值，進而提供該誤差值 改變脈波頻寬調變控制電路3產生調整之信號至功率 開關，使輸出電壓得以根據充電電壓及電流的反饋誤差 值進行調整，該電池8即可在穩定之定電壓模式下進行 M297821 充電，並減少功率損失。 时—而更進一步的，該充電電路更包括有一充電器控制 ::6以其充電的電流與充電電壓的關係，係隨著充 电％•間的增加，則充電電流不斷的下降，充電電壓不斷 的上故可藉由該控制單元依據該電池8之規格以及 飽和容量，控制輸出電壓時間以及電流值，故不會有過 度充電而損壞電池的狀況發生。 【圖式簡單說明】 第圖為手持電動工具機外觀部份透視圖； 第圖為手持電動工具機之底座與充電器待結合 之狀態； 第一圖為本創作電動工具充電器之充電電路方塊 圖；以及 第四圖為習用工具機充電器之充電電路方塊圖。 【主要元件符號說明】 1 市電 2、2a 整流器電路 3、 3 a 脈波頻寬調變控制電路 4、 4a變壓器電路5 感測電路 51 誤差放大器52 光隔離器 6 充電器控制7 濾波器電路 單元 8 91 電池 本體 充電器 y 手持工具機 92 底座 911 握持部 10 93 M297821 912 開口 921 插梢 931 凹槽The connection system converts the input and the machine voltage into a DC voltage; the pulse wave frequency modulation control = circuit, ▲ is connected to the rear end of the rectifier, and the pulse voltage is controlled by the input voltage, and the signal is received and received. The pulse width is changed to control the on/off of the power switch, and the primary armature includes a primary winding and a secondary winding. The primary winding is electrically connected to the pulse width modulation control circuit, so that the input = will be supplied to On the primary winding, and gradually increasing and storing energy therein: and a sensing circuit, the sensing circuit is composed of an error amplifier and an optical isolator, and is coupled to the pulse wave bandwidth modulation control circuit, The on-time is controlled by changing the pulse width to accurately change the output voltage of the human-level winding, and on the other hand, to intercept a part of the output voltage/pre-voltage, and compare the error values of the two. Adjusting the electricity The following examples will be described in conjunction with the drawings. The yoke examples of the cows listed below are used to clarify the creation and are not intended to limit the scope of the creation. Anyone who is familiar with the art can make some changes. versus Retouching, the scope of protection of this creation is subject to the scope of the patent application. M297821 [Embodiment] View 4 is closed—shown as a partial view of the appearance of the hand-held power tool. The hand-held power tool 9 is mainly composed of a body 91 and has a _ grip portion for the operator to work. The bottom of the grip portion 911 has an opening 912; the base 92 has a plug. The tip 921 can be inserted into the body 91 by the opening of the body 9i, and the base 92 includes a rechargeable battery 8'. The machine tool 9 is powered by the rechargeable battery 8 in the base 92. When the power of the battery is exhausted, the operator can cut the base 92 and the body 91, as shown in FIG. 2, showing the state of the base to be combined with the charger 93. The body of the present charger 93 has a recess 931 for the insertion of the socket 921 of the base 92 to electrically connect the charger 93 and the battery 8. Please refer to FIG. 3, which is a block diagram of the charging circuit of the power tool charger of the present invention. The charging circuit mainly comprises: a filter circuit 7, a rectifier circuit 2, and a pulse width modulation control circuit (P). WM), a transformer circuit 4, a sensing circuit 5 and a charger control unit 6; the filter circuit 7 is connected to the input terminal power supply i, and can remove noise to capture the input power to the specific frequency range. Stabilizing voltage; the rectifier circuit 2 is connected to the filter circuit 7 to convert the input AC voltage into a DC voltage; the pulse wave bandwidth modulation control circuit 3 is connected to the rear end of the rectifier circuit 2, and is input voltage The control pulse wave is adjusted by I degree, and can receive a signal to change the pulse width and control the power to open M297821 ff; the transformer circuit 4 includes the primary winding and the secondary and primary windings and the pulse wave bandwidth modulation control circuit 3 Phase two causes the input voltage to be supplied to the primary winding, and gradually increases and stores f, wherein; and the sensing circuit 5 is composed of a sub-difference amplification 551 and an optical isolator 52, the handle Combined In the pulse wave frequency, the modulation control circuit 3 is controlled by changing the pulse width: conducting two turns to accurately output the output voltage and reference from the secondary winding of the transformer circuit 4 to the other side. The voltage is compared, and the error values of the two are fed back, and the pulse width is changed to adjust the electric frequency. The optical isolator 52 can prevent the surge voltage from directly impacting the circuit to damage the component, and also serves as a communication aid for feedback. In the present embodiment, the secondary winding of the transformer circuit 4 will switch the power switch (such as an f crystal, not shown) according to the pulse frequency modulation control circuit 3 to generate an output current Lo 'the output current L 〇 via the secondary The winding resistor charges the grounding capacitor to generate the output voltage V. . The sensing circuit 5 operates a part of the output voltage Lo, and the error amplifier 51 compares the extracted output voltage Lo with the desired reference voltage, and outputs an error signal s to the pulse width modulation control circuit 3. According to the adjustment of the pulse width to control the power switch's on-time (Duty Cycle). The power tool charging stand of the present invention provides an error value generated by the sensing circuit according to the reference voltage and the output voltage, thereby providing the error value, and changing the pulse wave bandwidth modulation control circuit 3 to generate an adjusted signal to the power switch to make the output voltage It can be adjusted according to the feedback error value of charging voltage and current. The battery 8 can charge M297821 in stable constant voltage mode and reduce power loss. At the same time, the charging circuit further includes a charger control: 6 is related to the charging current and the charging voltage. As the charging rate increases, the charging current continuously decreases, and the charging voltage continues. Therefore, the control unit can control the output voltage time and the current value according to the specification of the battery 8 and the saturation capacity, so that the battery can be damaged without overcharging. [Simple diagram of the figure] The figure is a perspective view of the appearance of the hand-held power tool; the first picture shows the state of the base of the hand-held power tool and the charger to be combined; The first picture shows the charging circuit block of the power tool charger Figure; and the fourth figure is a block diagram of the charging circuit of the conventional machine tool charger. [Main component symbol description] 1 Mains 2, 2a Rectifier circuit 3, 3 a Pulse wave bandwidth modulation control circuit 4, 4a Transformer circuit 5 Sensing circuit 51 Error amplifier 52 Optical isolator 6 Charger control 7 Filter circuit unit 8 91 Battery body charger y Hand tool 92 Base 911 Grip 10 93 M297821 912 Opening 921 Insert 931 Groove