1144312076-IGBT-驱动电路设计精髓资料课件.ppt
- 【下载声明】
1. 本站全部试题类文档,若标题没写含答案,则无答案;标题注明含答案的文档,主观题也可能无答案。请谨慎下单,一旦售出,不予退换。
2. 本站全部PPT文档均不含视频和音频,PPT中出现的音频或视频标识(或文字)仅表示流程,实际无音频或视频文件。请谨慎下单,一旦售出,不予退换。
3. 本页资料《1144312076-IGBT-驱动电路设计精髓资料课件.ppt》由用户(晟晟文业)主动上传,其收益全归该用户。163文库仅提供信息存储空间,仅对该用户上传内容的表现方式做保护处理,对上传内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知163文库(点击联系客服),我们立即给予删除!
4. 请根据预览情况,自愿下载本文。本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
5. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007及以上版本和PDF阅读器,压缩文件请下载最新的WinRAR软件解压。
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 1144312076 IGBT 驱动 电路设计 精髓 资料 课件
- 资源描述:
-
1、1Semikron Hong KongNorbert Pluschke 07.10.2005IGBT Gate Driver CalculationGate Driver Requirement2Semikron Hong KongNorbert Pluschke 07.10.2005What is the most important requirement for an IGBT driver?Gate Peak current3Semikron Hong KongNorbert Pluschke 07.10.2005Conditions for a safety operationnWh
2、ich gate driver is suitable for the module SKM 200 GB 128D?Design parameters:fsw=10 kHzRg=?reverse recovery current Diode should be-1.5 x I diode by 80 degree case 130A x 1.5=195AGate resistor in range of“test gate resistor”4Semikron Hong KongNorbert Pluschke 07.10.2005How to find the right gate res
3、istor?Rg=7 OhmTwo gate resistors are possible for turn on and turn offRon=7 OhmRoff=10 Ohm195A max reverse recovery current5Semikron Hong KongNorbert Pluschke 07.10.2005Difference between Trench-and SPT Technologyn Trench Technology needs a smaller Gate chargeu Driver has to provide a smaller Gate c
4、hargen SPT Technology needs more Gate charge compared to Trench Technologyu Driver has to provide a higher Gate charge6Semikron Hong KongNorbert Pluschke 07.10.2005Driver performance different IGBT technologies needs different gate chargen Trench IGBT with same chip currentGate charge is 2.3 uC7Semi
5、kron Hong KongNorbert Pluschke 07.10.2005Driver performance different IGBT technologies needs different gate chargen SPT IGBT with same chip currentGate charge is 3 uC8Semikron Hong KongNorbert Pluschke 07.10.2005Demands for the gate driver nThe suitable gate driver must provide the requiredGate cha
6、rge(QG)power supply of the driver must provide the average power Average current(IoutAV)power supplyGate pulse current(Ig.pulse)most important nat the applied switching frequency(fsw)9Semikron Hong KongNorbert Pluschke 07.10.2005-8 151390Determination of Gate Charge nGate charge(QG)can be determined
7、 from fig.6 of the SEMITRANS data sheet QG=1390nCThe typical turn-on and turn-off voltage of the gate driver isVGG+=+15VVGG-=-8V10Semikron Hong KongNorbert Pluschke 07.10.2005Calculation of the average currentnCalculation of average current:nIoutAV=P/U V=+Vg+-Vgnwith P=E*fsw=QG*V*fswn IoutAV=QG*fsw
8、=1390nC*10kHz=13.9mAAbsolute value11Semikron Hong KongNorbert Pluschke 07.10.2005Power supply requirementsn Gate chargeu The power supply or the transformer must provide the energy(Semikron is using pulse transformer for the power supply,we must consider the transformed average power from the transf
9、ormer)n Average currentu Is related to the transformer12Semikron Hong KongNorbert Pluschke 07.10.2005Calculation of the peak gate current nExamination of the peak gate current with minimum gate resistanceE.g.RG.on=RG.off=7Ig.puls V/RG+Rint =23V/7+1=2.9 A13Semikron Hong KongNorbert Pluschke 07.10.200
10、5Pulse power rating of the gate resistorn P total Gate resistoru Ppulse Gate resistor =I out AV x V u More information:The problem occurs when the user forgets about the peak power ratingof the gate resistor.The peak power rating of many ordinary SMD resistors is quite small.There are SMD resistors
11、available with higher peak powerratings.For example,if you take an SKD driver apart,you will seethat the gate resistors are in a different SMD package to all the otherresistors(except one or two other places that also need high peak power).Theproblem was less obvious with through hole components sim
12、ply because theresistors were physically bigger.The Philips resistor data book has a good section on peak power ratings.14Semikron Hong KongNorbert Pluschke 07.10.2005Choice of the suitable gate drivernThe absolute maximum ratings of the suitable gate driver must be equal or higher than the applied
13、and calculated valuesGate charge QG=1390nCAverage current IoutAV=13,9mAPeak gate current Ig.pulse=2.9 ASwitching frequency fsw=10kHzCollector Emitter voltage VCE=1200VNumber of driver channels:2(GB module)dual driver15Semikron Hong KongNorbert Pluschke 07.10.2005Comparison with the parameters in the
展开阅读全文