Based on the current research on the discharge characteristics of CL composite circuit is not particularly comprehensive, so the discharge principle of CL composite circuit is studied, and two different states are obtained, respectively for oscillation and non-oscillation two states. Non oscillatory state because of the previous studies, therefore, the main study of oscillation state, analyzes the principles of the Ann circuit, deduces CL compound circuit sparks current, power, and the mathematical model of spark energy, using MATLAB to the power supply voltage, filter capacitance and inductance parameters of the simulation, get the 3 d and 2 d figure, The influence of power supply voltage, filter capacitance and inductance on discharge characteristics of CL composite circuit is analyzed. The results show that the spark current, power and energy all increase with the increase of filter capacitance. With the increase of inductance, the greater the hindrance to current, the spark power and spark energy will decrease. As the supply voltage increases, spark current, power and energy all increase.
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