Pulsed Power Source Based On Resonant Pulse Transformer

The triple resonance pulse transformer is a new type of pulse transformer, which is based on air-cored transformer. The voltage appearing across the pulse transformer is significantly less than the output voltage; instead, the full output voltage appears across the tuning inductor. The max ratio of peak load voltage to peak transformer voltage is 2.77. In the paper the theoretical analyses, engineering design and experimental investigation of the pulse power generator based on the triple resonance pulse transformer is made and the design method is bring forward. Based on the design method a pulse power generator based on the triple resonance pulse transformer is developed.First of all, in order to solve the flashover problem between coils because of un-uniform of the voltage distribution along the air-cored transformer's taper windings the voltage distribution of tapered winding is researched, which have theoretical and engineering significance for reliable and security operation of the air-cored transformer and triple resonance pulse transformer. Based on the idea of "field-circuit" association, multi-conductor transmission line (MTL) for tapered winding is bright forward. The distributed parameters of the MTL modle are obtained by use of the software ANSYS and then the distribution of the tapered winding can be gotten by solve the MTL model's time domain equations. The calculation results accord with the simulation experiment results, that is to say, MTL model of the tapered winding can be used for calculating voltage distribution of pulse transformer's taper winding. Based on the results, the methods to improve the distribution of the tapered winding are bring forwards by measuring and analyzing the voltage distribution of other taper windings with different structure.And then, by analyzing pulse transformer's lossless circuit, the analytical expression for the output voltage and the relation of the triple resonance circuit parameters are presented. Variations of output voltage and energy efficiency to circuit component values, stray parameters and distributing parameters are discussed by use of the software Pspice. It is indicated that both air-cored transformer and triple resonance pulse transformer the primary parameters are much influential, and therefore the resistance and stray inductance of primary circuit must be reduced. As for the triple resonance pulse transformer, the distributed capacitance of tuning inductor affects the output voltage of the transformer very much because the load capacitance is 80pF, and therefore the distributed capacitance of tuning inductor must be reduced. In addition, the triple resonance pulse transformer's output condition can be adjusted by tuning the tuning capacitor and the tuning inductor.According to the results of theoretic analysis and circuit simulation, the design method for the triple resonance pulse transformer is presented. By using the design methed—iterated simulation, a triple resonance pulse transformer is developed based on the developed air-cored transformer. The experimental results indicate that the ratio of the peak output voltage to the peak high voltage winding's voltage is 2 and the peak output voltage of the triple resonance pulse transformer is 600kV. Comparing with air-cored transforme, the energy transmission efficiency of the triple resonance pulse transformer is not improved. However, the power capacity of the triple resonance pulse trnasfomrer is increased, and more energy can by transmitted to the load capacitor. All results indicte that a triple resonance pulse transformer can be developed based on a discretional double resonance pulse transformer.