6ES5948-3UA13

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描述

6ES5948-3UA13

电能表作为电能计量的专用仪表,在电能管理仪器仪表中占有很大比例,其性能直接影响着电能管理的效率和科技水平。从产品的功能、性能及经济效益等多方面来看,全电子电能表与传统的感应式电能表相比,存在着明显的优势。而且电能表作为计量管理和用电管理的终端,它所提供的各种功能是实现电力系统自动化管理必不可少的。传统的测量都是采用A/D转换电路,但这种方法使部分电参量测量精度欠佳,性价比不理想,且软件编程相对复杂,微控制器必须对采样电路进行数据处理(如电压、电流的平均值、有效值,有功、无功计算等)。而随着现代电子产业的高速发展,测量电路的集成化、模块化成为未来发展的趋势,各大器件公司也纷纷推出自己的电能计量芯片。这种集成芯片不仅精确度高,而且硬件、软件设计简单,价格便宜,性价比高,极具市场潜力。本文给出了基于Microchip公司的MCP3906单相电能计量芯片,并以AVR公司的ATMega16为MCU设计开发的一款新型单相电能表实现方案。与以往电能表相比,该方案具有设计接口简单、结构紧凑、可靠性高等特点。

MCP3906的两个数字高通滤波器(HPF1和HPF2)可以滤除两个通道的系统偏移量,因此,有功功率的计算不含任何电路或系统偏移量。经过高通滤波后,电压和电流信号相乘,即可得出瞬时功率信号。此信号不含直流偏移分量,因此可有效利用求平均法(AveragingTechnique)计算出所需的有功功率输出。
瞬时功率信号包含的有功功率信息就是瞬时功率的直流分量。求平均法可用于计算正弦和非正弦波形,以及所有功率因数。瞬时功率经过低通滤波器(LPF)就可以产生瞬时有功功率信号。
通过MCP3906的DTF转换器可对瞬时有功功率信息进行累加,以产生输出脉冲,此脉冲的频率与平均有功功率成比例。FOUT0和FOUT1输出的低频脉冲可用于设计驱动机电式计数器和双相步进电机,以便显示实际消耗的有功功率。每个脉冲对应于一个固定的有功电量值,其功能可由F2、F1和F0的逻辑进行选择。HFOUT输出具有较高的频率设定和较低的积分周期,可用于表征瞬时有功功率信号。由于累加时间较短,该输出可使用户在稳定的负载条件下进行快速的校准。

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PLC模块,可编程控制器,CPU模块,IO模块,AI模块,通讯模块。AB/施耐德/ABB/GE/本特利/西屋/英维斯/霍尼韦尔/黑马/FU克斯波罗

15天包退换 一年质保 大量现货  国内实力库存商家


选择深圳长欣,选择放心,售后无忧大量现货,当天顺丰发货!
主营:本特利,英维思,伍德沃德,福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐,ACSO,力士乐等各大品牌的DCS系统配件,机器人系统配件,大型伺服系统备件。

先介绍几点经验。
1、先通读一遍“系统手册”(不管能不能看懂,先了解个大概,以便学习编程时查找);
2、由位控逻辑入手,逐渐增加定时、计数等条件,把或、与、非关系理顺;
3、进而练习整数运算、实数运算、类型转换;
4、量程转换、PID调节回路的建立及P、I、D参数的理解(最好是有个物理回路验证,比如变频器+电机+测速传感器);
5、循环、顺序、跳转等程序控制(尽量避免跳转,非跳不可时也是跳的越近越好);
6、中断、通讯、位置控制....

本人以ABB工业机器人配件DSQC系列和Motorola MVME系列,GE 卡件 模块 驱动器系列为主攻。各位电工朋友可根据自己的条件选择适合自己的PLC品牌,由于PLC的基本框架大同小异,学会一种至于其它的学习起来也就简单了。