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This paper presents a solar photovoltaic (PV) integrated, non-isolated four-port (one input and three output ports) power electronic interface for three-wheeler (3-W) / four-wheeler (4-W) light electric vehicles (EVs). For continuous operation and reliability, the proposed multiport converter is developed with fault-tolerant capability and improved performance parameters. Unlike traditional converters, the proposed four-port fault-tolerant dc-dc (FPFTDC) converter has several input/output characteristics with multiple advantages. The interleaved nature of the circuit reduces battery charging current ripple and the size of solar PV side capacitor with increased current capability. The impact of reduced ripple current on battery charging/discharging and the performance are discussed. The phase-shifted technique for a two-phase interleaved boost converter with fault-tolerant capability and maximum power point (MPP) tracking is developed for maximum PV power harvesting and reliable operation. The switched boost action with time multiplexing control is used to develop multiport converter output with the bidirectional capability of the converter for charging/discharging control of the battery energy storage system with other load output ports. The prototype converter setup has been developed and tested for all the different operating modes.
Masoom et al. (Mon,) studied this question.
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