摘要
由于大功率IGBT开通和关断集-射电压具有跨度大的特点,现有的大功率IGBT驱动检测电路无法同时实现宽范围、高精度的测量。为此提出了一种新的IGBT集电极开通和关断电压集成的测量电路。该电路通过电阻分压网络实现IGBT关断电压的测量;利用驱动信号来控制电流源向高压隔离二极管注入微小电流使其导通,并对此二极管误差进行补偿,实现IGBT导通饱和压降的精确测量。仿真和试验验证了设计电路的正确性和有效性,可为高压大功率IGBT高性能驱动器的研制奠定基础。
As the feature of large collector-emitter voltage span for turning-on/turning-off the large power IGBT,the existing IGBT drive detection circuit is unable to achieve both wide range and high precision measurement. For this reason,the new integrated measuring circuit for IGBT turning on / turning off voltage is proposed. The measurement of the turning off voltage of IGBT is realized through resistor voltage divider network,the drive signal is used to control current source for injecting small current to turn on the high voltage isolation diode,and the error of diode is compensated for implementing accurate measurement of the saturation voltage drop of IGBT. The results of simulation and experiment verify the correctness and effectiveness of the circuit designed,this lays the foundation for developing high performance drivers for high voltage large power IGBT.
出处
《自动化仪表》
CAS
北大核心
2014年第9期76-79,共4页
Process Automation Instrumentation
基金
国家自然科学基金资助项目(编号:51177170)
关键词
IGBT
集电极电压
饱和压降
电流源
测量
Insulated-gate bipolar transistor（IGBT） Collector voltage Saturation voltage drop Current source Measurement
