No abstract

Repetitive high voltage pulsed power system proposed in this study originates from conventional Marx generators. This newly developed Marx modulator employs high voltage (HV) Insulated Gate Bipolar Transistors (IGBT) as switches and seriesconnected diodes as isolated components. Self-supplied IGBT drivers and optic signals are used in the system to avoid insulation problem. Experimental results of 20 stages generating pulses with 60 kV, 20-100 μs and 50~500 Hz are presented to validate the performance of the system in the paper.

Resonant converters are widely used in high voltage applications thanks to the soft switching technologies. The high frequency and high voltage (HFHV) transformer is the most complicated and important part to boost the voltage by tens or hundreds of times, and the parasitic capacitance of the transformers is critical to the performances of resonant converters. To reduce the parasitic capacitance, the multi-section winding technique is usually employed in HFHV transformers. However, the parasitic capacitance values calculated by the classical methods are not consistent with the experimental results of HFHV transformers, and they are usually designed and optimized with low efficiency. This paper proposes a new analytic method for calculating the parasitic capacitance of HFHV transformers of multi-section windings, which is verified with good accuracy by experimental results.