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英飞凌IGBT厂家 > 英飞凌IGBT模块驱动 > 如何评估IGBT模块在系统中的损耗?

如何评估IGBT模块在系统中的损耗?

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河北快3走势图SHENZHENYISHENGTONGKEJIYOUXIANGONGSI

时间 : 2018-09-21 21:19 浏览量 : 45

如何评估IGBT模块在系统中的损耗?


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一般数据手册中,都会给出特定条件下,IGBT及Diode开关损耗的典型值。一般来讲这个值在实际设计中并不能直接拿来用。在英飞凌模块河北快3走势图数据手册中,我们可以看到,开关损耗典型值前面,有相当多的限制条件,这些条件描述了典型值测试平台。而实际设计的系统是不可能和规格书测试平台一模一样的。两者之间的差异,主要体现在如下几个方面:

  • IGBT的开关损耗不仅仅依赖于驱动电阻,也依赖于驱动环路的电感,而实际用户系统的驱动环路电感常常不同于数据手册的测试平台的驱动环路电感。

  • QUDONGZHONGJIARUZHAJIHEFASHEJIDIANRONGSHIHENCHANGJIANDEGAISHANEMCTEXINGDESHEJIFANGFA,ERSHIYONGGAIZHAJIDIANRONGHUIYINGXIANGIGBTDEKAIGUANGUOCHENGZHONGDIANLIUBIANHUALVdIc / dtHEDIANYABIANHUALVdVce / dt,CONGERYINGXIANGIGBTDEKAIGUANSUNHAO

  • SHIJIXITONGDEQUDONGDIANYAYECHANGCHANGBUTONGYUSHUJUSHOUCEZHONGDECESHIQUDONGDIANYA,ZAIIGBTMOKUAIDESHUJUSHOUCEZHONG,KAIGUANSUNHAOTONGCHANGZAI±15VDEZHAJIDIANYAXIACELIANG,ERYONGHUDEQUDONGDIANYAYOUSHIYEBINGFEIZHEIGEDIANYASHUZHI。

  • 河北快3走势图SHUJUSHOUCETONGCHANGHUIZAIJIAOXIAODEMUPAIZASANDIANGANXIAJINXINGKAIGUANSUNHAOCESHI,ERSHIJIXITONGDEMUPAIHUOZHEPCBDEBUJUCHANGCHANGHUICUNZAIBIJIAODADEZASANDIANGAN。

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河北快3走势图TU1JICHULESHUANGMAICHONGDECESHIYUANLITU,TU2JICHULESHUANGMAICHONGCESHISHIDEBOXINGTU,DIANXINGDESHUANGMAICHONGCESHIKEYIANZHAOTU1HETU2 JINXING,TONGSHIXUYAOZHUYIJIANGJIAREPINGTAIDIAOZHENGDAOYIDINGDEWENDU,BINGDENGDAIYIDINGSHIJIAN,QUEBAOIGBTDEJIEWENYEDAODASHEDINGWENDU。

图1-1: IGBT的双脉冲测试原理图
图1-2: Diode的双脉冲测试原理图
图2-1: IGBT的双脉冲测试波形图
图2-2:Diode的双脉冲测试波形图

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图3-1 IGBT关断过程

DUT:FF600R12ME4; CH2(绿色)- VGE,CH 3(蓝色)- ce,CH4(红色)- Ic

图3-2 IGBT开通过程

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图4:在不同的电流输入条件下,以电压和温度为给定条件的IGBT的开关损耗曲线

YIJUTU4JICHUDESUNHAOCESHIQUXIAN,KEYIYIJUXIANXINGDENGXIAODEFANGFADEDAOIGBTDEKAITONGSUNHAOHEGUANDUANSUNHAOZAIDIANLIU,DIANYA,JIEWENXIADETUIDAOGONGSHI。

TONGLIYEKEYIDEDAODiodeZAIJIDINGXITONGDEDIANYA,DIANLIU,JIEWENSHEJIFANWEINEIDEFANXIANGHUIFUSUNHAODETUIDAOGONGSHI:

图5:在不同的电流输入条件下,以电压和温度为给定条件的Diode反向恢复损耗曲线

河北快3走势图SUIRANZHEILIJIESHAODEFANGFAXIANGDUIYUCAIYONGIGBTSHUJUSHOUCEDEKAIGUANSUNHAODIANXINGZHITIGONGLEYIXIEGAIJIN,DANRENGCUNZAIYIXIEQUEDIAN,BIRUZAIFEICHANGDIDEDIANLIUSHI,SUNHAOHUIYOUYIDINGDEWUCHA,ZHEIKEYITONGGUOCAIYONGFEIXIANXINGMOXINGHUODUOJIDEDIANLIUXIANXINGMOXINGLAIYOUHUA。

通过采用实际系统的驱动和母排进行双脉冲测试,在系统设计的电压,电流和温度范围内,可以得到比采用数据手册的典型值更准确的损耗评估。(英飞凌igbt厂家)


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