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This paper presents a detailed performance comparison (including efficiency, EMC performance and component electrical stress) between boost and buck type PFC under critical conduction mode (CRM). In universal input (90-265Vac) applications, the CRM buck PFC has around 1% higher efficiency compared to its counterpart at low-line (90Vac) condition. Due to the low voltage swing of switch, buck PFC has...
A n-stage cascaded boost converter connected with a single active switch is usually used in applications with high conversion ratio. It has been reported that the dynamic of the transfer function output-voltage-to-duty cycle related with the first inductor is minimum phase and the second, third or n inductor current has right-hand side (RHS) zeros; as a result, it is obtained and increment of complexity...
In this paper, a controller for a three-stage cascade boost converter connected in cascaded with a single active switch is proposed to step-up the unregulated voltage supply produced by a fuel cell system. The proposed hybrid controller is able to work in several operation regions while having the feature of a simple structure easy to implement. The controller description and experimental results...
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