Experimental studies on repetitive pulsed power modulator with compact Tesla transformer
A designed pulsed power modulator are experimentally studied in single pulse mode and in repetitive mode,respectively.The measured maximum secondary charging voltages of the Tesla transformer are 370 kV and 300 kV in single pulse mode and repetitive mode(50 Hz),respectively.The charging operation of Tesla transformer can be steadily carried out and the modulator's highest output voltage through a 100 Ω resistive load in single pulse mode is 330 kV with 7 ns duration and 2 ns rise time.The cooling system and gas blowing system are unnecessary and unadopted experimentally in repetitive mode when the number of pulses in a batch is less than or equal to 300.As a result,the volume and weight of the modulator system is reduced.In the range of 300 pulses in a batch,with the increase of the pulse number in repetitive mode,the average value of the output voltage declines and the pulse-to-pulse instability of output voltage decreases.At the same time,the decline degree of the output voltage increases and stabilizes when there is more than 50 pulses in a batch.With the increase of the repetition rate,the pulse-to-pulse instability of output voltage increases,and the average value of the output voltage declines,especially after the repetition rate exceeds 40 Hz.The pulsed power modulator can steadily output 310 kV for 300 pulses in 40 Hz repetition rate.