High Step-up Modular Switched-Capacitor DC-DC Converter with Fault Tolerance Capability

Zhengzhao He; Tiejiang Yuan; Wenping Cao; Zhengyu Lin

doi:10.20944/preprints201804.0154.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 10 April 2018 / Approved: 11 April 2018 / Online: 11 April 2018 (14:18:54 CEST)

A modular switched-capacitor (SC) DC-DC converter (MSCC) is introduced in this paper. It is designed to boost a low input voltage to a high voltage level and can be applied for photovoltaics and electric vehicles. This topology has high extensibility for high voltage gain output. The merits of the converters also lie in the fault tolerance operation and the voltage regulation with a minimum change in the duty ratio. Those features are built in when designing the modules and then integrating these into the DC-DC converter. Converter performance including voltage gain, voltage and current stress are focused and tested. The converter is modelled analytically, and its control algorithm is analyzed in detailed. Both simulation and experiment are carried out to verify the topology under normal operation and fault mode operation.

DC-DC power converter; fault tolerance; multilevel converter; switched-capacitor network

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High Step-up Modular Switched-Capacitor DC-DC Converter with Fault Tolerance Capability

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