大功率IEGT变频器及其桥臂改造

来源期刊：冶金自动化2009年第3期

论文作者：吴成梁 吴培文

文章页码：45 - 48

关键词：电子注入增强栅晶体管； 变频器； 门极触发电路； 脉宽调制技术； 钳位式二极管； IEGT桥臂改造

Key words：IEGT； inverter； gate trigger circuit； PWM technique； clamping diode； IEGT bridge arm modification

摘    要：湖南华菱涟源钢铁有限公司薄板坯连铸连轧(CSP)生产线的主轧机传动电控系统采用日本Temic公司生产的大功率IEGT变频器。大功率IEGT是一项传动领域的新技术,其变频器采用的IEGT元件,是一种大功率低电压触发和高速可控通断的新型电压型元件,IEGT变频器为交-直-交变频器,采用三电平PWM控制方式。在使用中对IEGT变频器桥臂进行了升级改造,增加了保护电阻,并将AC母排更换成机械强度更大的铜母排,改造后的系统提高了IEGT桥臂抵抗冲击、振动的能力和抗击过电压的能力,消除了隐患。

Abstract: High power IEGT inverter made by Temic Co.,Ltd.in Japan is used in electric control system of main rolling mill drive in thin slab continuous casting & rolling line of Hunan Valin LY Iron and Steel Co.,Ltd.High power IEGT is a new technology in the domain of electric drive.IEGT element in inverter is a high power and low voltage triggering,high speed and on-off controllable,and new type voltage source element.IEGT inverter is a AC-DC-AC inverter,and is controlled by three-level PWM.In use,upgrade modification of bridge arm of IEGT inverter was carried out.Protective resistor was added,and AC bus was replaced by copper bus with higher mechanical strength.After system was modified,capability resistant to strike,vibration and overvoltage of IEGT bridge arm was improved,and hidden trouble was removed.