A Comprehensive Analysis of DC-DC Converters for EV Application by Southern California Edison (SCE)
2023 IEEE Green Energy and Smart Systems Conference (IGESSC)(2023)
摘要
Electric Vehicles (EVs) are rapidly increasing along with traditional vehicles in the transportation domain. All EV battery chargers require an ac-dc and a dc-dc converter. The prime focus of this paper is on the dc-dc converter, and a pugh chart method is applied to narrow down the selection of current dc-dc converter topologies. Power loss in the semiconductor devices is calculated to evaluate the efficiency of the selected converters. Afterward, a detailed circuit is developed to determine the temperature rise and cost of the converter components. It has been found that the power loss of a flyback converter is 20% less than a push-pull converter; thus, it exhibited a 2% higher efficiency than the push-pull converter. Three of the push-pull converter components exceeded the maximum allowable 90 degrees C temperate, while flyback converter components remained within the limit. The cost is also 16% lower for a flyback converter than the push-pull converter. It has been concluded that a flyback converter would be an optimum choice for the EV battery charger application.
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