linghuidianliyouyuanlvboqijiapfderendouxiaode，yigehaodeyouyuandianlilvboqi，kendinghuipeiyouhaode“xinzang”，igbtzhuangpei。shenmeshiigbtni？tazaidianlilvboqizhongqizheshenmeyangdeganhuani？
shenmeshiigbt?igbtdeganhua?
IGBT(Insulated Gate Bipolar Transistor)，全称为绝缘栅双极型晶体管(以下图所示)，是今朝成长最敏捷的新型功率器件，具备很是好的开关特征和导通特征。IGBT产物调集了高频、高压、大电流三大技术上风，是电力电子装备中的焦点部件，触及几近一切电压品级下的电气装备。有源滤波器电力滤波器任务中首要操纵了的他的开关特征及功率传导性。
igbtyouhezhangchuni?
igbtshiyoubjt(shuangjixingsanjiguan)hemos(jueyuanzhaxingchangxiaoyingguan)gouchengdefuhequankongxingdianyaqudongshigonglvbandaotiqijian, jianyoumosfetdegaoshuchuzukanghegtrdedidaotongyajiangliangfangmiandezhangchu。
gtrbaoheyaxiajiang，zailiumiduda，danqudongdianliujiaoda，qudongdianlupangza;mosfetshidanjixingdianyaqudongqijian，qudonggonglvhenxiao，kaiguansulvkuai，qudongdianlujianlve，dandaotongyajiangda，zailiumiduxiao。
igbtzongheleyishangliangzhongqijiandezhangchu，qudonggonglvxiaoerbaoheyaxiajiang。henshiheshiliyongyuzhiliudianyawei600vjiyishangdebianliutixirujiaohuanjidian、bianpinqi、kaiguandianyuan、zhaomingdianlu、qianyinchuandongdengfanchou。
hanjiandeigbtbujushishenmeyangde？
jianxiatu（a）he（b）。igbtyeshisanduanqijian，jubeizhajig、jidianjichefashejie。xiatu(a)jichuleyizhongyoungoudaomosfetyushuangjixingjingtiguanzuhegouchengdeigbt(weingoudaoigbt)degenjijigou。
p+zhuruquyunqugouchengleyigedamianjidep+njiej1.zheishideigbtdaotongshiyoup+zhuruquxiangnjiqufasheshaozi，congerduipiaoyiqudiandaolvtingzhidiaozhi，shideigbtjubeihenqiangdetongliucaineng。
jianhuadengxiaoturu(b)，kekanchuzheishiyongshuangjixingjingtiguanyumosfetgouchengdedalindunbuju，xiangchengyuyigeyoumosfetqudongdehoujiqupnpjingtiguan。
turnweijingtiguanjiquneidediaozhidianzu。shiyi，igbtdequdongdaoliyudianlimosfetgenjibuyi，tayeshichangkongqijian。qishoujiuheguanduanshiyouzhajihefashejijiandedianyaugejueyide，dangugeweizhengqiedayukaiqidianyashi，mosfetneigouchenggoudao，bingweijingtiguangongjijijidianliujinershiigbtdaotong。yinweihoumiantidaodediandaodiaozhixiaoying，shidedianzurnjianxiao，ruxugaonaiyadeigbtyejubeihendidetongtaiyajiang。
当栅极与发射极间施加反向电压或不加旌旗灯号时，MOSFET的沟道消逝，晶体管的基极电流被堵截，使得IGBT关断。这便是IGBT作为电力有源滤波器的“心脏”所阐扬的感化。
