汽车工业是人类现代文明的重要标志之一,进入21世纪后随着人类环境保护意识的加强以及能源危机的日益突显,使得人们不得不重新审视和定位汽车产业的现状和将来。电动汽车具有节能,零排放,低噪声等优点,是真正绿色环保的交...
上传时间: 2013-05-24
上传用户:q123321
H桥电路,电机驱动原理
标签: H桥电路
上传时间: 2013-06-06
上传用户:yangbo69
PSIM是趋向于电力电子领域以及电机控制领域的仿真应用包软件。 PSIM具有仿真高速、用户界面友好、波形解析等功能,为电力电子电路的解析、控制系统设计、电机驱动研究等有效提供强有力的仿真环境。 本仿真解析系统,不只是回路仿真单体,还可以和其他公司的仿真器连接,为用户提供高开发效率的仿真环境。例如,在电机驱动开发领域,控制部分用MATLAB/Simulink实现,主回路部分以及其周边回路用PSIM实现,电机部分用电磁界解析软件JMAG实现,由此进行连成解析,实现更高精度的全面仿真系统。
上传时间: 2013-07-30
上传用户:secsz2003
特点: 精确度0.1%满刻度 可作各式數學演算式功能如:A+B/A-B/AxB/A/B/A&B(Hi or Lo)/|A|/ 16 BIT类比输出功能 输入与输出绝缘耐压2仟伏特/1分钟(input/output/power) 宽范围交直流兩用電源設計 尺寸小,穩定性高
上传时间: 2014-12-23
上传用户:ydd3625
上传时间: 2013-11-10
上传用户:vmznxbc
摘要本文基于AVR单片机Atmegal6,通过自动拨号模块、无线收发模块、红外检测模块、烟雾检测模块的配合下,完成用户的智能防火防盗报警系统。整个系统1)2Atmegal6为核心,当通过无线收发模块发出布防信号时,就会启动各个模块进行监控。当红外、烟雾检测模块检测到异常情况,在火情启动时自动拨号模块进行自动报警,在盗情时启动自动拨号模块与电机驱动模块分别进行自动报警和对保护区域死锁,完成防火防盗的功能,实现系统稳定、可靠的T作。
上传时间: 2013-10-08
上传用户:hphh
TLC2543是TI公司的12位串行模数转换器,使用开关电容逐次逼近技术完成A/D转换过程。由于是串行输入结构,能够节省51系列单片机I/O资源;且价格适中,分辨率较高,因此在仪器仪表中有较为广泛的应用。 TLC2543的特点 (1)12位分辩率A/D转换器; (2)在工作温度范围内10μs转换时间; (3)11个模拟输入通道; (4)3路内置自测试方式; (5)采样率为66kbps; (6)线性误差±1LSBmax; (7)有转换结束输出EOC; (8)具有单、双极性输出; (9)可编程的MSB或LSB前导; (10)可编程输出数据长度。 TLC2543的引脚排列及说明 TLC2543有两种封装形式:DB、DW或N封装以及FN封装,这两种封装的引脚排列如图1,引脚说明见表1 TLC2543电路图和程序欣赏 #include<reg52.h> #include<intrins.h> #define uchar unsigned char #define uint unsigned int sbit clock=P1^0; sbit d_in=P1^1; sbit d_out=P1^2; sbit _cs=P1^3; uchar a1,b1,c1,d1; float sum,sum1; double sum_final1; double sum_final; uchar duan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; uchar wei[]={0xf7,0xfb,0xfd,0xfe}; void delay(unsigned char b) //50us { unsigned char a; for(;b>0;b--) for(a=22;a>0;a--); } void display(uchar a,uchar b,uchar c,uchar d) { P0=duan[a]|0x80; P2=wei[0]; delay(5); P2=0xff; P0=duan[b]; P2=wei[1]; delay(5); P2=0xff; P0=duan[c]; P2=wei[2]; delay(5); P2=0xff; P0=duan[d]; P2=wei[3]; delay(5); P2=0xff; } uint read(uchar port) { uchar i,al=0,ah=0; unsigned long ad; clock=0; _cs=0; port<<=4; for(i=0;i<4;i++) { d_in=port&0x80; clock=1; clock=0; port<<=1; } d_in=0; for(i=0;i<8;i++) { clock=1; clock=0; } _cs=1; delay(5); _cs=0; for(i=0;i<4;i++) { clock=1; ah<<=1; if(d_out)ah|=0x01; clock=0; } for(i=0;i<8;i++) { clock=1; al<<=1; if(d_out) al|=0x01; clock=0; } _cs=1; ad=(uint)ah; ad<<=8; ad|=al; return(ad); } void main() { uchar j; sum=0;sum1=0; sum_final=0; sum_final1=0; while(1) { for(j=0;j<128;j++) { sum1+=read(1); display(a1,b1,c1,d1); } sum=sum1/128; sum1=0; sum_final1=(sum/4095)*5; sum_final=sum_final1*1000; a1=(int)sum_final/1000; b1=(int)sum_final%1000/100; c1=(int)sum_final%1000%100/10; d1=(int)sum_final%10; display(a1,b1,c1,d1); } }
上传时间: 2013-11-19
上传用户:shen1230
#include<iom16v.h> #include<macros.h> #define uint unsigned int #define uchar unsigned char uint a,b,c,d=0; void delay(c) { for for(a=0;a<c;a++) for(b=0;b<12;b++); }; uchar tab[]={ 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,
上传时间: 2013-10-21
上传用户:13788529953
针对科研实验中对拉压千斤顶加载过程控制的需要,采用ATmega128单片机控制步进电机进而实现对执行系统的电动泵站实行自动控制。对力和位移的数据采集与处理及用步进电机控制电动泵站手柄的技术细节作了重点描述。通过单片机的A/D变换器对AMP放大模块采集的电桥信号作量化处理,千斤顶的操控手柄位置依电动油泵阀门开启的方向和大小作若干定位,单片机根据力或位移传感器信号,实时控制步进电机驱动手柄旋转到相应操控位置。 Abstract: This article describes the use of ATmega128 AVR microcontroller series of DBS electric pumping stations and QF100/200 separate twoway hydraulic jack to automate the process of manipulating the work of the technical content. Articles on force and displacement data acquisition and processing, and stepper motor control electric pump with the handle of the key technical details were described. Through the MCU’s A / D converter module is collected on the AMP amplification quantify the signal bridge, jack handle position control valve opening according to the direction of electric pumps for a number of positioning and size of the microcontroller based on force or displacement sensor signals, real-time control stepper motor drive control handle rotate to the appropriate location.
上传时间: 2014-01-16
上传用户:hasan2015
设计了一种基于PIC16C71单片机的数字水温配制阀。该配制阀采用NTC热敏电阻作温度传感器,与固定电阻组成简单分压电路作为水温测量电路,利用PIC16C71单片机内置的8位A/D转换器把热敏电阻上的模拟电压转换为数字量,PIC16C71单片机控制直流电机驱动混水阀调节冷热水的混合比例实现水温调节。给出了控制电路图,对水温测量电路的参数选择和测温精度作了详细讨论。实验和分析表明,选用阻值较大的NTC热敏电阻和分压电阻可较好地解决热敏电阻因功耗较大造成的热击穿问题。 Abstract: A digital valve for controlling water temperature based on PIC16C71 was presented in this paper.A bleeder circuit which consisted of a NTC thermistor as temperature sensor and a fixed resistance was designed as water temperature measuring circuit.The analog voltage on the thermistor was converted into digital signal by a 8-bit A/D converter embedded in PIC16C71. Based on the digital signal, the MCU PIC16C71 drived the valve by a DC motor to adjust the water temperature through adjusting the proportion of hot water and cold water.The circuit diagram of controller was given,the principle,the component parameters and the accuracy of measuring temperatures were also dissertated in detail. It was found by experiment and analysis that thermal breakdown of thermistor caused by high power could be solved by selecting thermistor and fixed resistance with high impedance value.
上传时间: 2013-11-08
上传用户:Yue Zhong