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Superbuck converter output capacitance monitoring

The failure of Superbuck converters in space power supply systems is mainly caused by the degradation of the output capacitor, so it is important to monitor the health status of the output capacitor. By analyzing the relationship between the output voltage ripple and the output capacitance, the ESR and C identification models are established and the output capacitance parameters are identified by obtaining only the voltage values at two moments. Simulations are used to verify the effectiveness of the output capacitance monitoring method for Superbuck converters under different operating conditions.