Verification of novel recovery-less boost converter with saturable inductor

Higher efficiency performances, lower EMI/RFI noise, and low cost boost converter have been required in power conversion system for Electric Vehicle, Plug-in Hybrid Electric Vehicle. Recovery-less boost converter are satisfied all those demands, without active power switch. So far, recovery-less boost converter are proposed two method; with the auxiliary inductor type or the saturable inductor type. The purpose of this paper is to indicate the effectiveness of recovery-less boost converter with the saturable inductor. First, the problem of recovery-less boost converter using auxiliary inductor is taken up from trade-off between reduction of recovery loss and deterioration of circuit performance. Second, the principle of recovery-less boost converter using saturable inductor which can solve the trade-off problem, is described. Finally, the effectiveness of recovery-less boost converter with the saturable inductor is discussed from experimental point of view.