关于IG BT启动电流大的分析与研究

在电磁炉工作启动瞬间,由于是在硬开关下开始启动的,故开通启动电流非常大,有时可达100A以上,而目前电磁炉行业常使用的IGBT—H20R1203规格最大脉冲电流只能允许60A。过大的启动电流是烧坏IGBT的因素之一,通过研究IGBT的特性,改变IGBT驱动电源,可有效降低IGBT启动电流,实践验证,将IGBT驱动电压由18V改成12V,IGBT检锅时,IGBT CE电流可降低18A左右,启动电流降至规格要求附近。

Pressure Tolerant Power Electronics： IGBT Gate Driver for Operation in High Pressure Hydrostatic Environment

Abstract： This paper presents results from an on-going research project on pressure tolerant power electronics at SINTEF Energy Research, Norway. The driving force for this research is to enable power electronic components to operate in pressurized dielectric environment. The intended application is the converters for operation down to 3,000 meters ocean depth, primarily for subsea oil and gas processing. The paper focuses on the needed modifications to a general purpose gate driver for IGBT （insulated gate bipolar transistors） that will give pressure tolerance. Adaptations and modifications of the individual driver components are presented.The results from preliminary testing are promising, which shows that the considered adaptations give feasible solutions.

电磁感应加热新型谐振系统研究

LC并联谐振回路是目前电磁炉(电磁感应加热)单管方案常用的电路,也是电磁炉的核心电路,此电路是否可以进行优化改良,达到降低IGBT电压呢。本文是从变化谐振电路中谐振电容的位置入手,通过电路分析,仿真,实际测试验证等方式,确认通过改动谐振电容的位置,以及变化谐振电容的等效电容等产生新型谐振系统,新电路系统可有效降低IGBT(绝缘栅双极型晶体管,下同)电压25～150V。