為了有效地提升鉛酸蓄電池的使用壽命，同時實現(xiàn)對充電過程的監(jiān)控，設(shè)計出一種用單片機控制的36 V鉛酸蓄電池充電電源。本電路采用反激式拓撲，連續(xù)電流工作模式，電源管理IC設(shè)計在電源的副邊，由ELAN公司的EM78P258N單片機模擬，是用可編程器件模擬電源管理IC，實現(xiàn)智能電源低成本化的一次成功嘗試，通過對單片機的軟件設(shè)計實現(xiàn)了充電電源的狀態(tài)顯示、充電時間控制、報警、過溫保護、過壓保護、過流保護等功能。本充電器真正的實現(xiàn)了鉛酸蓄電池的三段式充電過程，其最高輸出功率可達90 W，效率約85%，成本不到20元，具有很高的市場競爭力。
Abstract: In order to extend the life of lead-acid battery efficiently and supervise the charging process meanwhile， a 36V lead-acid battery charge powe supply controlled by microcontroller is designed. The charger is flyback switching power supply and works in CCM mode. A EM78P258N microcontroller made by ELAN microelectronics corporation is used as power management IC which is designed at the secondary circuit. The project is a successful attempt to low-cost intelligent power used microcontroller simulating power management IC. The charger also has the functions of the status reveal， charge time control， alarming， thermal protect， current limit and overvoltage protect by the software design. The circuit actually implements the three-step charge process， whose power is up to 90W and whose efficiency can get 85%. The net cost of this charger is less than 20 RMB， so that the charger is of powerful market competitiveness.
實時時鐘是微機保護裝置的重要部件，在討論PCF8583結(jié)構(gòu)與功能的基礎(chǔ)上，提出采用dsPIC33F系列微處理器與串行I2C時鐘PCF8583的接口設(shè)計方案，給出了相應(yīng)的接口電路與軟件流程。該設(shè)計方案結(jié)構(gòu)簡單，可靠性高，開發(fā)周期短，具有一定的實用與參考價值。所設(shè)計的微機保護裝置已投入現(xiàn)場運行，效果良好。
Abstract:
Real-time clock chip is an important part in microcomputer protection device.Based on discussing the structure and function of PCF8583，a new interface scheme which uses dsPIC33F microprocessor and serial clock chip（I2C）PCF8583is proposed.The method of the circuit design and the main software flow are introduced in this paper.The scheme has simple structure，higher reliability and shorter exploitation cycle，so has definite practicality or reference value.The microcomputer protection device has been put into operation with better effects.
在汽車發(fā)動機起動時，若發(fā)動機起動后起動機不能及時斷電，將會燒毀起動機或損壞飛輪齒環(huán)；若變速器不在空檔位置起動，則起動機的瞬間動力將使汽車位移，還可能引起交通事故和人身安全。為此介紹一種利用NXP P89LPC901單片機控制的汽車起動保護控制器，通過檢測汽車起動開關(guān)、變速箱檔位、發(fā)動機轉(zhuǎn)速，實現(xiàn)對汽車發(fā)動機起動過程檢測和保護。起動保護控制器在發(fā)動機起動過程中通過采用逐個關(guān)閉打開負載系統(tǒng)，解決汽車發(fā)動機過程中因起動電流大而對汽車電源的沖擊影響,延長了電瓶壽命。
Abstract:
When the automotive engine is started, the engine start motor and flywheel gear may be damaged， even traffic accidents and personal safeties may be caused by wrong operation or other factors.In order to ensure the automotive engine can be started normally and safely,it is necessary that the protecting measures and methods are considered in the automotive electrical control system.This paper introduces a kind of the automotive engine starting protect controller based on NXP P89LPC901 MCU.The controller can protect the engine starting process by detecting the starter key switch,transmission stall and engine speed.Through the use of close and open load system,the controller can solve the impact on automotive power because of the high-current load in the process of the automobile engine starting, and extend battery life.
