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The novel non-isolated high step-down DC-DC converter is proposed to reduce the voltage stress of main switch. The new capacitive voltage division method is used to store the input energy in input capacitors. The three input capacitors are connected across the input supply to store and release the energy to three interleaved buck converter with high step down ratio without less duty ratio. The input capacitor voltage division method will reduce the voltage stress of switch, hence easy to select the low rating switch. The low rating switch offer low on state resistance, which result in reduced conduction loss of switch. The application of interleaved PWM provides input ripple current cancellation as a result input and output current ripple get reduced. The three phase interleaved converter proposes analysis, principle of working and simulation results are presented. The proposed new method is examined under various simulation parameters are such as switching loss, conduction loss, current ripple, and voltage gain. The proposed converter simulation was done using MATLAB/Simulink environment. The presented simulation result is validated by experimental result of prototype proposed converter with 29.1 volt input 1.091 volt output.
Babu et al. (Sat,) studied this question.
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