对种子源结构进行了优化设计,为了缩短充电时间,在现有的电容和DC变换器基础之上，选用单片机作为控制芯片，利用其脉冲宽度调制(PWM）输出功能产生用于控制DC变换器的线性电压。对单片机PWM输出转化为线性控制电压的性能以及控制DC变换器恒流充电的可行性开展了实验研究。实验结果表明，基于PIC单片机的种子源储能可以达到250 J，充电时间缩短到6 min以内，满足实验要求。

A capacitor-discharge seed source based on PIC has been designed. In order to charge quickly and effectively, the source takes advantage of the single-chip pulse width modulation(PWM) to produce a linear voltage which can control the DC-DC converter. And as a result, the charging process is constant current charging. Theoretical and experimental results show that, the seed sourcd charges fast, and reduces the loss during charging. Its energy storage is 250 J, and its volume is smaller than 3 000 cm3.The seed source, which can produce more than 2 kA initial current on 100 μH load in calculation, meets the test requirements.