Power Loss Analysis of Two-Input Buck-Boost Type DC-DC Converter

Recently, the multiple-input power supply systems have been developed aggressively to exploit the clean energy resources such as solar array, fuel cell, wind generator and so forth. However, the power loss analysis of the multiple-input DC-DC converter has not been made and therefore it is not clarified how to improve the power efficiency of this converter. In this paper, the composition and distribution of the power loss of the converter are analyzed and the occurring mechanism of the power loss is defined. The parameters that dominantly affect the power efficiency are indicated. As a result, the methods to achieve high power efficiency for the converter are obtained