Research on Repetition Frequency Pulse Current Source Based on Solid State Switching Technology

Based on solid state switching technology and capacitor energy storage, a pulsed power current source with repetition frequency function is designed and developed. Using the thyristors with high di/dt and large peak current as a solid state switching device, a pulsed power current source with repetition frequency function is designed and implemented. FPGA control mode is adopted to realize the nano seconds level periodic triggering precision, and the triggering consistency of the control unit is good, with the maximum error less than 6 ns. A prototype was manufactured and the tests were carried out. The results of single pulse and repetition frequency tests showed that the pulse peak current of single series thyristor can reach 158 kA, the repetition rate can reach 1 Hz, and the period dispersion is less than 0.000025‰, and the peak dispersion is less than 3‰. The results show that the repetition frequency power current source based on solid state switch has the advantages of high current, high di/dt and repetition frequency triggering, and the cycle triggering precision is good, the control method is convenient, and the high and low voltage isolation is safe and reliable, so it has a certain popularization prospect.