TSC系列可控硅動(dòng)態(tài)無功功率補(bǔ)償器采用大功率可控硅組成的無觸點(diǎn)開關(guān),對(duì)多級(jí)電容器組進(jìn) 行快速無過渡投切,克服了傳統(tǒng)無功功率補(bǔ)償器因采用機(jī)械觸點(diǎn)燒損,對(duì)電容沖擊大等缺點(diǎn)。對(duì)各 種負(fù)荷均能起到良好的補(bǔ)償效果。 TSC-W型補(bǔ)償器采用的三相獨(dú)立控制技術(shù)解決了三相不平衡沖 擊負(fù)荷補(bǔ)償?shù)募夹g(shù)難題,屬國內(nèi)首創(chuàng),填補(bǔ)了國內(nèi)空白。
標(biāo)簽: TSC 可控硅 動(dòng)態(tài) 無功功率
上傳時(shí)間: 2014-12-24
上傳用戶:199311
Features: High efficiency, high reliability, low cost AC input range selected by switch 100% full load burn-in test Protections: Short circuit / Over load Fixed switching frequency at 25KHz Cooling by free air convection 1 year warranty Dimensions: 199*98*38mm (L*W*H)
標(biāo)簽: Switchin Output Single SKS
上傳時(shí)間: 2013-10-30
上傳用戶:taa123456
為了有效地提升鉛酸蓄電池的使用壽命,同時(shí)實(shí)現(xiàn)對(duì)充電過程的監(jiān)控,設(shè)計(jì)出一種用單片機(jī)控制的36 V鉛酸蓄電池充電電源。本電路采用反激式拓?fù)洌B續(xù)電流工作模式,電源管理IC設(shè)計(jì)在電源的副邊,由ELAN公司的EM78P258N單片機(jī)模擬,是用可編程器件模擬電源管理IC,實(shí)現(xiàn)智能電源低成本化的一次成功嘗試,通過對(duì)單片機(jī)的軟件設(shè)計(jì)實(shí)現(xiàn)了充電電源的狀態(tài)顯示、充電時(shí)間控制、報(bào)警、過溫保護(hù)、過壓保護(hù)、過流保護(hù)等功能。本充電器真正的實(shí)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(dá)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.
標(biāo)簽: 單片機(jī)控制 充電電源 鉛酸蓄電池
上傳時(shí)間: 2013-11-16
上傳用戶:cepsypeng
序號(hào) 參數(shù) 數(shù)據(jù) 單位 參數(shù) 說 明 . 輸 入 參 數(shù) 變 量 1 umin V 交流輸入電壓最小值 2 umax V 交流輸入電壓最大值 3 fL Hz 電網(wǎng)頻率 4 f kHz 開關(guān)頻率 5 UO V 直流輸出電壓 6 PO W 輸出功率 7 η % 電源效率 8 Z 0.5 損耗分配系數(shù) 9 UFB V 反饋電壓
標(biāo)簽: 反激式開關(guān)電源 電子 數(shù)據(jù)表格
上傳時(shí)間: 2013-10-14
上傳用戶:小碼農(nóng)lz
AT89C2051驅(qū)動(dòng)步進(jìn)電機(jī)的電路和源碼:AT89C2051驅(qū)動(dòng)步進(jìn)電機(jī)的電路和源碼 程序:stepper.c stepper.hex/* * STEPPER.C * sweeping stepper's rotor cw and cww 400 steps * Copyright (c) 1999 by W.Sirichote */#i nclude c:\mc5151io.h /* include i/o header file */ #i nclude c:\mc5151reg.hregister unsigned char j,flag1,temp; register unsigned int cw_n,ccw_n;unsigned char step[8]={0x80,0xc0,0x40,0x60,0x20,0x30,0x10,0x90} #define n 400/* flag1 mask byte 0x01 run cw() 0x02 run ccw() */main(){ flag1=0; serinit(9600); disable(); /* no need timer interrupt */ cw_n = n; /* initial step number for cw */ flag1 |=0x01; /* initial enable cw() */while(1){ { tick_wait(); /* wait for 10ms elapsed */energize(); /* round-robin execution the following tasks every 10ms */ cw(); ccw(); } }}cw(){ if((flag1&0x01)!=0) { cw_n--; /* decrement cw step number */ if (cw_n !=0) j++; /* if not zero increment index j */ else {flag1&=~0x01; /* disable cw() execution */ ccw_n = n; /* reload step number to ccw counter */ flag1 |=0x02; /* enable cww() execution */ } }
上傳時(shí)間: 2013-11-21
上傳用戶:boyaboy
The CAT9555 is a CMOS device that provides 16-bitparallel input/output port expansion for I²C and SMBuscompatible applications. These I/O expanders providea simple solution in applications where additional I/Osare needed: sensors, power switches, LEDs,pushbuttons, and fans.
上傳時(shí)間: 2014-01-09
上傳用戶:1101055045
PIC16F84 單片機(jī)的內(nèi)部硬件資源:學(xué)些PIC 單片機(jī),在Microchip 尚未推出其他Flash 系列的情況下,很多菜鳥都是從PIC16F84 開始的,我們把它整理了一份中文資料供大家學(xué)習(xí)。首先介紹PIC16F84 單片機(jī)的內(nèi)部結(jié)構(gòu),如圖1 所示的框圖。由圖1 看出,其基本組成可分為四個(gè)主要部分,即運(yùn)算器ALU 和工作寄存器W;程序存儲(chǔ)器;數(shù)據(jù)存儲(chǔ)器和輸入/輸出(I/O)口;堆棧存儲(chǔ)器和定時(shí)器等。現(xiàn)分別介紹如下。
上傳時(shí)間: 2013-12-26
上傳用戶:zgu489
含原理圖+電路圖+程序的波形發(fā)生器:在工作中,我們常常會(huì)用到波形發(fā)生器,它是使用頻度很高的電子儀器。現(xiàn)在的波形發(fā)生器都采用單片機(jī)來構(gòu)成。單片機(jī)波形發(fā)生器是以單片機(jī)核心,配相應(yīng)的外圍電路和功能軟件,能實(shí)現(xiàn)各種波形發(fā)生的應(yīng)用系統(tǒng),它由硬件部分和軟件部分組成,硬件是系統(tǒng)的基礎(chǔ),軟件則是在硬件的基礎(chǔ)上,對(duì)其合理的調(diào)配和使用,從而完成波形發(fā)生的任務(wù)。 波形發(fā)生器的技術(shù)指標(biāo):(1) 波形類型:方型、正弦波、三角波、鋸齒波;(2) 幅值電壓:1V、2V、3V、4V、5V;(3) 頻率值:10HZ、20HZ、50HZ、100HZ、200HZ、500HZ、1KHZ;(4) 輸出極性:雙極性操作設(shè)計(jì)1、 機(jī)器通電后,系統(tǒng)進(jìn)行初始化,LED在面板上顯示6個(gè)0,表示系統(tǒng)處于初始狀態(tài),等待用戶輸入設(shè)置命令,此時(shí),無任何波形信號(hào)輸出。2、 用戶按下“F”、“V”、“W”,可以分別進(jìn)入頻率,幅值波形設(shè)置,使系統(tǒng)進(jìn)入設(shè)置狀態(tài),相應(yīng)的數(shù)碼管顯示“一”,此時(shí),按其它鍵,無效;3、 在進(jìn)入某一設(shè)置狀態(tài)后,輸入0~9等數(shù)字鍵,(數(shù)字鍵僅在設(shè)置狀態(tài)時(shí),有效)為欲輸出的波形設(shè)置相應(yīng)參數(shù),LED將參數(shù)顯示在面板上;4、 如果在設(shè)置中,要改變已設(shè)定的參數(shù),可按下“CL”鍵,清除所有已設(shè)定參數(shù),系統(tǒng)恢復(fù)初始狀態(tài),LED顯示6個(gè)0,等待重新輸入命令;5、 當(dāng)必要的參數(shù)設(shè)定完畢后,所有參數(shù)顯示于LED上,用戶按下“EN”鍵,系統(tǒng)會(huì)將各波形參數(shù)傳遞到波形產(chǎn)生模塊中,以便控制波形發(fā)生,實(shí)現(xiàn)不同頻率,不同電壓幅值,不同類型波形的輸出;6、 用戶按下“EN”鍵后,波形發(fā)生器開始輸出滿足參數(shù)的波形信號(hào),面板上相應(yīng)類型的運(yùn)行指示燈閃爍,表示波形正在輸出,LED顯示波形類型編號(hào),頻率值、電壓幅值等波形參數(shù);7、 波形發(fā)生器在輸出信號(hào)時(shí),按下任意一個(gè)鍵,就停止波形信號(hào)輸出,等待重新設(shè)置參數(shù),設(shè)置過程如上所述,如果不改變參數(shù),可按下“EN”鍵,繼續(xù)輸出原波形信號(hào);8、 要停止波形發(fā)生器的使用,可按下復(fù)位按鈕,將系統(tǒng)復(fù)位,然后關(guān)閉電源。硬件組成部分通過綜合比較,決定選用獲得廣泛應(yīng)用,性能價(jià)格高的常用芯片來構(gòu)成硬件電路。單片機(jī)采用MCS-51系列的89C51(一塊),74LS244和74LS373(各一塊),反相驅(qū)動(dòng)器 ULN2803A(一塊),運(yùn)算放大器 LM324(一塊) 波形發(fā)生器的硬件電路由單片機(jī)、鍵盤顯示器接口電路、波形轉(zhuǎn)換(D/ A)電路和電源線路等四部分構(gòu)成。1.單片機(jī)電路功能:形成掃描碼,鍵值識(shí)別,鍵功能處理,完成參數(shù)設(shè)置;形成顯示段碼,向LED顯示接口電路輸出;產(chǎn)生定時(shí)中斷;形成波形的數(shù)字編碼,并輸出到D/A接口電路;如電路原理圖所示: 89C51的P0口和P2口作為擴(kuò)展I/O口,與8255、0832、74LS373相連接,可尋址片外的寄存器。單片機(jī)尋址外設(shè),采用存儲(chǔ)器映像方式,外部接口芯片與內(nèi)部存儲(chǔ)器統(tǒng)一編址,89C51提供16根地址線P0(分時(shí)復(fù)用)和P2,P2口提供高8位地址線,P0口提供低8位地址線。P0口同時(shí)還要負(fù)責(zé)與8255,0832的數(shù)據(jù)傳遞。P2.7是8255的片選信號(hào),P2.6是0832(1)的片選,P2.5是0832(2)的片選,低電平有效,P0.0、P0.1經(jīng)過74LS373鎖存后,送到8255的A1、A2作,片內(nèi)A口,B口,C口,控制口等寄存器的字選。89C51的P1口的低4位連接4只發(fā)光三極管,作為波形類型指示燈,表示正在輸出的波形是什么類型。單片機(jī)89C51內(nèi)部有兩個(gè)定時(shí)器/計(jì)數(shù)器,在波形發(fā)生器中使用T0作為中斷源。不同的頻率值對(duì)應(yīng)不同的定時(shí)初值,定時(shí)器的溢出信號(hào)作為中斷請(qǐng)求。控制定時(shí)器中斷的特殊功能寄存器設(shè)置如下:定時(shí)控制寄存器TCON=(00010000)工作方式選擇寄存器(TMOD)=(00000000)中斷允許控制寄存器(IE)=(10000010)2、鍵盤顯示器接口電路功能:驅(qū)動(dòng)6位數(shù)碼管動(dòng)態(tài)顯示; 提供響應(yīng)界面; 掃面鍵盤; 提供輸入按鍵。由并口芯片8255,鎖存器74LS273,74LS244,反向驅(qū)動(dòng)器ULN2803A,6位共陰極數(shù)碼管(LED)和4×4行列式鍵盤組成。8255的C口作為鍵盤的I/O接口,C口的低4位輸出到掃描碼,高4位作為輸入行狀態(tài),按鍵的分布如圖所示。8255的A口作為LED段碼輸出口,與74LS244相連接,B口作為LED的位選信號(hào)輸出口,與ULN2803A相連接。8255內(nèi)部的4個(gè)寄存器地址分配如下:控制口:7FFFH , A口:7FFFCH , B口:7FFDH , C口:7FFEH 3、D/A電路功能:將波形樣值的數(shù)字編碼轉(zhuǎn)換成模擬值;完成單極性向雙極性的波形輸出;構(gòu)成由兩片0832和一塊LM324運(yùn)放組成。0832(1)是參考電壓提供者,單片機(jī)向0832(1)內(nèi)的鎖存器送數(shù)字編碼,不同的編碼會(huì)產(chǎn)生不同的輸出值,在本發(fā)生器中,可輸出1V、2V、3V、4V、5V等五個(gè)模擬值,這些值作為0832(2)的參考電壓,使0832(2)輸出波形信號(hào)時(shí),其幅度是可調(diào)的。0832(2)用于產(chǎn)生各種波形信號(hào),單片機(jī)在波形產(chǎn)生程序的控制下,生成波形樣值編碼,并送到0832(2)中的鎖存器,經(jīng)過D/A轉(zhuǎn)換,得到波形的模擬樣值點(diǎn),假如N個(gè)點(diǎn)就構(gòu)成波形的一個(gè)周期,那么0832(2)輸出N個(gè)樣值點(diǎn)后,樣值點(diǎn)形成運(yùn)動(dòng)軌跡,就是波形信號(hào)的一個(gè)周期。重復(fù)輸出N個(gè)點(diǎn)后,由此成第二個(gè)周期,第三個(gè)周期……。這樣0832(2)就能連續(xù)的輸出周期變化的波形信號(hào)。運(yùn)放A1是直流放大器,運(yùn)放A2是單極性電壓放大器,運(yùn)放A3是雙極性驅(qū)動(dòng)放大器,使波形信號(hào)能帶得起負(fù)載。地址分配:0832(1):DFFFH ,0832(2):BFFFH4、電源電路:功能:為波形發(fā)生器提供直流能量;構(gòu)成由變壓器、整流硅堆,穩(wěn)壓塊7805組成。220V的交流電,經(jīng)過開關(guān),保險(xiǎn)管(1.5A/250V),到變壓器降壓,由220V降為10V,通過硅堆將交流電變成直流電,對(duì)于諧波,用4700μF的電解電容給予濾除。為保證直流電壓穩(wěn)定,使用7805進(jìn)行穩(wěn)壓。最后,+5V電源配送到各用電負(fù)載。
標(biāo)簽: 波形發(fā)生器 原理圖 電路圖 源程序
上傳時(shí)間: 2013-11-08
上傳用戶:685
The μPSD32xx family, from ST, consists of Flash programmable system devices with a 8032 MicrocontrollerCore. Of these, the μPSD3234A and μPSD3254A are notable for having a complete implementationof the USB hardware directly on the chip, complying with the Universal Serial Bus Specification, Revision1.1.This application note describes a demonstration program that has been written for the DK3200 hardwaredemonstration kit (incorporating a μPSD3234A device). It gives the user an idea of how simple it is to workwith the device, using the HID class as a ready-made device driver for the USB connection.IN-APPLICATION-PROGRAMMING (IAP) AND IN-SYSTEM-PROGRAMMING (ISP)Since the μPSD contains two independent Flash memory arrays, the Micro Controller Unit (MCU) can executecode from one memory while erasing and programming the other. Product firmware updates in thefield can be reliably performed over any communication channel (such as CAN, Ethernet, UART, J1850)using this unique architecture. For In-Application-Programming (IAP), all code is updated through theMCU. The main advantage for the user is that the firmware can be updated remotely. The target applicationruns and takes care on its own program code and data memory.IAP is not the only method to program the firmware in μPSD devices. They can also be programmed usingIn-System-Programming (ISP). A IEEE1149.1-compliant JTAG interface is included on the μPSD. Withthis, the entire device can be rapidly programmed while soldered to the circuit board (Main Flash memory,Secondary Boot Flash memory, the PLD, and all configuration areas). This requires no MCU participation.The MCU is completely bypassed. So, the μPSD can be programmed or reprogrammed any time, anywhere, even when completely uncommitted.Both methods take place with the device in its normal hardware environment, soldered to a printed circuitboard. The IAP method cannot be used without previous use of ISP, because IAP utilizes a small amountof resident code to receive the service commands, and to perform the desired operations.
標(biāo)簽: Demonstration 3200 USB for
上傳時(shí)間: 2014-02-27
上傳用戶:zhangzhenyu
LCD為LCM161(HD44780驅(qū)動(dòng)器)字符顯示器驅(qū)動(dòng)程序 ;說明:本LCD為LCM161(HD44780驅(qū)動(dòng)器)字符顯示器. ;接線:LCD D0-D8(PIN7-14) 對(duì)映用戶板P0.0--P0.7 ; LCD VSS(PIN1) 接 GND,VDD(PIN2)接+5V,LCD驅(qū)動(dòng)電源V0(PIN3)接可調(diào)電阻ADJ,調(diào)節(jié)亮度 ; LCD寄存器選擇RS(PIN4)接P2.0,讀寫選擇R/W(PIN5)接P2.1,使能端EN(PIN6)接P2.2(高電平有效) ;本程序采用I/O口模仿總線時(shí)序,故無需做任何硬件擴(kuò)展.屏幕顯示:"I'm SuperICES! ",
上傳時(shí)間: 2013-10-17
上傳用戶:ssz1990
蟲蟲下載站版權(quán)所有 京ICP備2021023401號(hào)-1