Effect of Temperature on the Capacitance Value of Film Capacitors Used in the EMP Simulators

Analyzing the effect of temperature on the capacitance value of the film capacitors used in the electromagnetic pulse (EMP) simulator helps to ensure the stability of the output pulse. In this paper, a temperature loading test platform for the film capacitors is constructed, and the variation of capacitance values of film capacitors at different temperatures, heating times and alternating temperatures are tested and compared. The capacitance values of film capacitors are positively correlated with the temperature. At the same temperature and after applying the alternating-temperature stress to return to the ambient temperature, the capacitance values fluctuate up and down with the heating times, but the variation is not significant.