1.2 MV大功率直流高压电源研制

 采用等边三角形结构的铁芯，次级线圈分成40级，分别进行三相全波整流，每级输出直流30 kV，串联后获得1.2 MV/A的直流高电压大功率输出。电源的能量转换效率大于95%，漏抗高达21.7%。采用无滤波电容结构，次级线圈星型/三角型接法交替使用，纹波系数小于±4%。整个电源密封在压力钢筒中，充0.8 MPa高纯度SF6气体作为绝缘介质，最大工作场强小于130 kV/cm。设计了专门的SF6气体冷却系统，气体温度控制在60 ℃以内，高电压由充气同轴传输线输出。在小负载条件下，电源各项指标满足技术要求，已经安装在1.2 MW，1.2 MeV大功率直流电子加速器上进行整机联调。

Development of 1.2 MV high power DC generator

Equilateral-triangle configuration iron core with secondary coil divided into 40 stages, each stage is three-phase full-wave rectified and outputs 30 kV in the design of high power high voltage DC generator, which in series output 1.2 MV/A with energy efficiency of 95% and leakage impedance of 21.7%. Configuration of none-filter capacitance and starlike/trangular connection mode were applied with ripple factor less than ±4%. The whole generator was encapsulated in a steel cylinder filled with highly purified SF6 gas as insulation medium at pressure 0.8 MPa and maximum electric field less than 130 kV/cm, with special cooling system and operating temperature of SF6 controlled less than 60 ℃. Gas-filled coaxial transmission line structure was adopted for high voltage output. All the technic