滤波器

■产品概述product overvlew

PWM逆变器直接驱动电机时合产生较高dv/dt的共横电压，并由此产生轴承电流和共模温电流以及严重的电磁干挑(EMD。特别是当逆变器通过长蛾电绩与电机连接时，由于电缆中分布参数的影响，会在电机幽产生电压反射现象，从而在电机赠会产生2倍以上的过电压，导致线图绝绳失败。度为电气的dv/dt滋波器降低电机电境传辅线效应电压的增大而衰减率，减少在电机端子上所发生的峰值电压。

When a PWM inwerterdirecty drives a motor,it generates a highdvidt common mode voltape,reaulting in bearing current,common modeleakage curent,and severe elecromagnetec interterence (EM).Especially when the inverter is connecled to the motor througha longcable,dueto the influence ot distrbuted parameters in the cable,voltage renection phenomenon wil ccur at the motor end,resulting inmore than twice the overvoltage at the motor end,leading to col insulation tilure.The dvidt titer tor electrical purposes reduces theattenuation ratecaused by the increase in the transmission line feetvottage of motorcables,andreduces the peak voltage that occurs atthe motor terminals.

■产品应用product Applicatior

dw/dt滤波器是设计用于保护电机的滤波器，由于变频器与电机之间运行电缆过长会引起对电机产生毁灭性影响峰值电压。电缆的长度取决于用在变频器中的电力半导体的开关次数和电机的大小，如果点看短到2.5米则会导致电机承受的峰值电压超过电机绝缘系统的额定值。然而，如果电组太长则问题更大，在这种情况下就潜要用dv/dt滤波器来保护电机不受峰值电压的殿灭性影响

Dv/dtfiter isa filter dasigned to protectmotors.Due to the longrunning cable betweenthefrequency converter andthe motor,itcan causedestructive effects on themotors peakvoltage.The lengthof the cabledependson thenumber ofswitchesof the powersemlconductorusedin thefrequency converterand the size of themotor.Ifthe distancelsasshort as2.5meters,it will cause thepeakvoltage borne bythemotor to exceed therated value ofthemotorinsulation system.However,if the cableis too long.theproblem becomes even greater,inwhichcaseadv/dt filter isneededtoprotect the motor from thedestructiveeffects of peakvoltage.

■技术规格Tachnical specifications

+最大工作电压：400VAC-1140VAC
·额定电魂：5-500A+辆率：50-60Hz
·防护等级：IP00-IP20绝缘等级：classF₂H
·使用环境：-10-+45℃,额定值不会降任。最高可达+55℃,在45℃以上，每升高1℃,额定电流降任2%
·电境长度：<1000m
+过载电流：1.5×额定电流，持续605
·噪音：≤65dB+温升：≤70K
+抗电强度；铁芯统组3000VAC/50Hz/5mA/10s无飞孤击穿(工厂测试)绝缘电阻：1000VDC绝绿阻值100M0
·海拔高度不超过2000米
·运行环境温度-25℃-+45℃,相对湿度不垣过90%周国无有害气体，无易烟易焊物品
·周国环境应有良好的通风条件，如装在柜内，应加装通风设备

■执行标准Execution standards

IEC289:1987Reactor
G810229-88Reactor(eqviEC289:1987)J89644-1999 Reactorsusedforsemiconductor electricaldriving