Design of seed source based on PIC microcontroller unit

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 H load in calculation, meets the test requirements.