Abstract
To miniaturize the non-isolated converter, the use of high driving frequencies is an effective means of downsizing inductors. However, the loss of inductors increases along with driving frequencies. In this paper, we considered means of reducing two types of loss in inductors, namely, iron loss using magnetic composite materials and copper loss using a vacant space. The Q factor can be effectively improved by providing vacant space that width of the vacant space is preferably slightly smaller than that of the copper plate above and below the copper plate. And the efficiency of the non-isolated dc–dc converter applied the inductor with vacant space is increased compared with that of the without vacant.
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