Abstract
Temperature rise is one of the major causes for all-film pulsed capacitor (AFPC) failure under high repetitive high-voltage pulse discharge operations. To study the thermal characteristics, a thermal simulation model is established. In this model, the actual operation conditions of capacitors are applied. The practical internal structure and heat production transfer of the AFPC are considered. The validation of the model is proved by the simulation and the experimental results. Based on the finite element method (FEM), the overall temperature field distribution of the AFPC, and the mathematical model between discharge voltage, frequency and temperature rise can be calculated. This model is capable of evaluating the temperature rise characteristics of an AFPC in repetitive high-voltage pulse discharge and can provide certain instructive suggestions for the safe operation and the optimal design of AFPC.
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