Theoretical Design And Simulation Research Of High Power Tesla Transformer

In recent years,with the introduction of relevant national policies to encourage military-civilian integration,the application of pulse power technology has gradually expanded from national defense research and high-tech research to civil industrial applications.Tesla transformer pulse source has the characteristics of high repetition frequency,small size and high energy conversion efficiency,which are very suitable for industrial applications.At present,some scholars have carried out research on its application in electric pulse crushing,electrostatic dust removal,food sterilization,water pollution treatment and so on.With the expansion of the application range,the design requirements of Tesla transformers are also getting higher and higher.Re-frequency,modularization and miniaturization are its future development direction.At now,the Tesla transformer design process is complicated,the calculation methods of key parameters are diverse,and the calculation accuracy is not good;the insulation strength design relies on traditional experience and lacks theoretical calculation analysis.These problems lead to a certain gap between the Tesla transformer output parameters and the target parameters,and there are certain insulation safety risks for the long-term stable operation of the transformer.Therefore,in this paper,the theoretical design of the high-power Tesla transformer is carried out in response to these problems.It is good for engineering application value and theoretical guiding significance to carry out in-depth research on the parameter calculation and structural optimization of the transformer.In this paper,the voltage and current expressions of Tesla transformer are derived through the analysis of Tesla transformer working circuit,and the primary and secondary coil inductance and resistance are determined as the main influencing factors in the circuit.Using COMSOL simulation software,a working circuit model was established,and the effects of primary and secondary coils and resistance on the secondary output waveform were analyzed.The Tesla transformer model was established,and the primary and secondary inductances were calculated using the formula estimation method and the finite element method respectively.Comparison shows that the finite element method is more accurate and versatile in calculating the coil inductance.The finite element method was used to calculate the capacitance parameters of the Tesla transformer,which provided a basis for the analysis and calculation of the inter-turn voltage when the secondary winding was subjected to pulse high voltage.In response to the parameter requirements of the Tesla transformer pulse source which applied to electric pulse crushing.Basing on theoretical calculation analysis,this paper analyzed the influence of the magnetic core and coil structure on the Tesla transformer inductance using COMSOL finite element software;the core material was selected and completed optimized design of magnetic core structure and primary and secondary coil structure.According to the electric field distribution law of Tesla transformers,it can be seen that the electric field distribution of the first and second ends of the secondary high-voltage winding is strong.By adding measures such as shielding rings and parallel winding of the first end winding,the electric field distribution in this area can be effectively reduced to ensure the insulation of the transformer safety.Finally,the pulse output waveform is calculated according to the designed Tesla transformer,the output voltage amplitude is 202000 V,the simulation calculation parameters are consistent with the target parameters,and the accuracy of the Tesla transformer’s theoretical design is verified.