叙述了固态调制器过压和欠压状态的特点,伏安特性曲线和负载线在工程设计中的重要性。介绍了160个IGBT开 关管组成的串联开关调制器工作状态选择,不同的工作状态对驱动电路设计提出了不同的要求和为了满足技术要求,在 电路上必须采取的技术措施。给出的IGBT栅极驱动特性、密勒效应的数学表达式及其对栅极电压UGE波形的影响,为后 面将要介绍的部分设计分析奠定了专业理论基础。

Firstly, the paper introduces the feature of solid-state modulator in over-voltage and under-voltage working state and voltampere characteristic curve, and discusses the importance of load line in engineering design. Then, the paper introduces the optional working states of serial switch modulator consisting of 160 IGBT switch tubes and the technical measures must be adopted by driving circuit to satisfy these different working states. After that, the paper introduced IGBT grid driving characteristics and Miler effect and their effect on waveform of gird voltage UGE. The paper lays a solid professional theoretical foundation for analysis and design in successive papers (the middle part and the last part).