alexa Abstract | Bidirectional Edge-Resonant Switched Capacitor Cell-Assisted Soft-Switching Dc-Dc Converter
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
Open Access

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Here a soft-switching pulse width modulation (PWM) non-isolated bidirectional dc-dc (BDC) converter embedding an edge-resonant switched capacitor (ER-SWC) cell is presented. Bidirectional dc-dc converters serve the purpose of stepping up or stepping down the voltage level between its input and output. Bidirectional dc-dc converter has the capability of power flow in both the directions. The conceptual bidirectional dc-dc converter treated here can be operated in two modes: - buck mode (step-down) operation and boost mode (step-up) operation. The converter here operated in discontinuous conduction mode (DCM). So the converter can achieve high-frequency zero-current softswitching (ZCS) turn-on and zero-voltage soft-switching (ZVS) turn-off operations in the active switches. Those advantageous properties enable a wide range of soft-switching operations together with a high-voltage step-up conversion ratio with a reduced current stress. Circuit design guidelines based on the soft-switching range is introduced. Then, a theoretical analysis is carried out for investigating the step-up voltage conversion ratio. The simulation is carried out here in MATLAB/Simulink platform. For demonstrating the effectiveness of the softswitching PWM bidirectional dc-dc converter, a 22W-40kHz prototype is evaluated in experiments, and then its performances are discussed.

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Author(s): Saritha Thomas Vaidyan, Rabiya Rasheed

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