分。它们将以各种方式把自己的能量传播出去，形成对变频器本身和其它设备的干扰信号。 （1）输入电流的
fen ta men jiang yi ge zhong fang shi ba zi ji de neng liang chuan bo chu qu xing cheng dui bian pin qi ben shen he qi ta she bei de gan rao xin hao 1 shu ru dian liu de
和输出电流中，都含有很多高次谐波成分。除了能构成电源无功损耗的较低次谐波外，还有许多频率很高的谐波成
he shu chu dian liu zhong dou han you hen duo gao ci xie bo cheng fen chu le neng gou cheng dian yuan wu gong sun hao de jiao di ci xie bo wai hai you hu duo pin lv hen gao de xie bo cheng
切换时，产生大量耦合性噪声。因此变频器对系统内其它的电子、电气设备来说是一电磁干扰源。 变频器的输入
qie huan shi chan sheng da liang ou he xing zao sheng yin ci bian pin qi dui xi tong nei qi ta de dian zi dian qi she bei lai shuo shi yi dian ci gan rao yuan bian pin qi de shu ru
电网的其它电子、电气设备产生谐波干扰。另外变频器的逆变器大多采用pwm技术，当工作于开关模式且作高速
dian wang de qi ta dian zi dian qi she bei chan sheng xie bo gan rao ling wai bian pin qi de ni bian qi da duo cai yong pwm ji shu dang gong zuo yu kai guan mo shi qie zuo gao su
压而击穿。 其次是变频器自身对外部的干扰。变频器的整流桥对电网来说是非线性负载，它所产生的谐波对同一
ya er ji chuan qi ci shi bian pin qi zi shen dui wai bu de gan rao bian pin qi de zheng liu qiao dui dian wang lai shuo shi fei xian xing fu zai ta suo chan sheng de xie bo dui tong yi
或切出的暂态过程中，网络电压有可能出现很高的峰值，其结果是可能使变频器的整流二极管因承受过高的反向电
huo qie chu de zan tai guo cheng zhong wang luo dian ya you ke neng chu xian hen gao de feng zhi qi jie guo shi ke neng shi bian pin qi de zheng liu er ji guan yin cheng shou guo gao de fan xiang dian
的功率因数有一定的要求，为此，许多用户都在变电所采用集中电容补偿的方法来提高功率因数。在补偿电容投入
de gong lv yin shu you yi ding de yao qiu wei ci hu duo yong hu dou zai bian dian suo cai yong ji zhong dian rong bu chang de fang fa lai ti gao gong lv yin shu zai bu chang dian rong tou ru
回复电压而受到损害，从而导致输入回路击穿做爱小说而烧毁。 2、电力补偿电容对变频器的干扰 电力部门对用电单位
hui fu dian ya er shou dao sun hai cong er dao zhi shu ru hui lu ji chuan zuo ai xiao shuo er shao hui 2 dian li bu chang dian rong dui bian pin qi de gan rao dian li bu men dui yong dian dan wei
分时间内导通，容易使网络电压出现凹口，波形严重失真。它使变频器输入侧的整流电路有可能因出现较大的反向
fen shi jian nei dao tong rong yi shi wang luo dian ya chu xian ao kou bo xing yan zhong shi zhen ta shi bian pin qi shu ru ce de zheng liu dian lu you ke neng yin chu xian jiao da de fan xiang
管换流设备对变频器的干扰 当供电网络内有容量较大的晶闸管换流设备时做爱小说，由于晶闸管总是在每相半周期内的部
guan huan liu she bei dui bian pin qi de gan rao dang gong dian wang luo nei you rong liang jiao da de jing zha guan huan liu she bei shi zuo ai xiao shuo you yu jing zha guan zong shi zai mei xiang ban zhou qi nei de bu
干扰对变频器主要有: (1)过压、(2)浪涌、跌落 (3)尖峰电压脉冲 (4)射频干扰。 1、 晶闸
gan rao dui bian pin qi zhu yao you : (1) guo ya (2) lang yong die luo (3) jian feng dian ya mai chong (4) she pin gan rao 1 jing zha
电源受到来自被污染的交流电网的干扰后若不加处理，电网噪声就会通过电网电源电路干扰变频器。 供电电源的
dian yuan shou dao lai zi bei wu ran de jiao liu dian wang de gan rao hou ruo bu jia chu li dian wang zao sheng jiu hui tong guo dian wang dian yuan dian lu gan rao bian pin qi gong dian dian yuan de
设备等。这些负荷都使电网中的电压、电流产生波形畸变，从而对电网中其它设备产生危做爱小说害的干扰。变频器的供电
she bei deng zhe xie fu he dou shi dian wang zhong de dian ya dian liu chan sheng bo xing ji bian cong er dui dian wang zhong qi ta she bei chan sheng wei zuo ai xiao shuo hai de gan rao bian pin qi de gong dian
源干扰变频器。电网中存在大量谐波源如各种整流设备、交直流互换设备、电子电压调整设备，非线性负载及照明
yuan gan rao bian pin qi dian wang zhong cun zai da liang xie bo yuan ru ge zhong zheng liu she bei jiao zhi liu hu huan she bei dian zi dian ya diao zheng she bei fei xian xing fu zai ji zhao ming
同的措施。 一、 变频器做爱小说干扰的来源 首先是来自外部电网的干扰。电网中的谐波干扰主要通过变频器的供电电
tong de cuo shi yi bian pin qi zuo ai xiao shuo gan rao de lai yuan shou xian shi lai zi wai bu dian wang de gan rao dian wang zhong de xie bo gan rao zhu yao tong guo bian pin qi de gong dian dian
和推广的关键之一。 谈到变频器的抗干扰问题，首先要了解干扰的来源、传播方式，然后再针对这些干扰采取不
he tui guang de guan jian zhi yi tan dao bian pin qi de kang gan rao wen ti shou xian yao le jie gan rao de lai yuan chuan bo fang shi ran hou zai zhen dui zhe xie gan rao cai qu bu
，如何提高系统的抗干扰能力和可靠性是自动化装置研制和应用中不可忽视的重要内容做爱小说，也是计算机控制技术应用
ru he ti gao xi tong de kang gan rao neng li he ke kao xing shi zi dong hua zhuang zhi yan zhi he ying yong zhong bu ke hu shi de zhong yao nei rong zuo ai xiao shuo ye shi ji suan ji kong zhi ji shu ying yong
时虽不能损坏系统的硬件，但常使微处理器的系统程序运行失控，导致控制失灵，从而造成设备和生产事故。因此
shi sui bu neng sun huai xi tong de ying jian dan chang shi wei chu li qi de xi tong cheng xu yun hang shi kong dao zhi kong zhi shi ling cong er zao cheng she bei he sheng chan shi gu yin ci
干扰设计技术(即电磁兼容emc)已经变得越做爱小说来越重要。变频器系统的干扰有时能直接造成系统的硬件损坏，有
gan rao she ji ji shu ( ji dian ci jian rong emc) yi jing bian de yue zuo ai xiao shuo lai yue zhong yao bian pin qi xi tong de gan rao you shi neng zhi jie zao cheng xi tong de ying jian sun huai you
在各种工业控制系统中，随着变频器等电力电子装置的广泛使用，系统的电磁干扰（emi）日益严重，相应的抗
zai ge zhong gong ye kong zhi xi tong zhong sui zhe bian pin qi deng dian li dian zi zhuang zhi de guang fan shi yong xi tong de dian ci gan rao emi ri yi yan zhong xiang ying de kang