This paper investigates the reliability of an isolated buck-boost DC-DC converter (IBBC) based on configuration a series resonant (SRC). Two approaches are employed to predict IBBC reliability, which MIL-HDBK-217F handbook and FIDES guide. The latter approach can take into account how failure rate components physics is influenced by varying yearly mission profile. To do this, thermal loading ea...

This paper presents a nonisolated, high boost ratio hy-brid transformer dc–dc converter with applications for low-voltage renewable energy sources. The proposed converter utilizes a hy-brid transformer to transfer the inductive and capacitive energy simultaneously, achieving a high boost ratio with a smaller sized magnetic component. As a result of incorporating the resonant operation mode into...

The new type of L-LLC resonant bidirectional DC-DC converter (L-LLC-BDC) has merits high efficiency, high-power density and wide gain power ranges, it is suitable for energy interface between storage systems DC micro grid. However, the resonances are sensitive to parasitic parameters, which will deteriorate efficiency. This paper investigates intrinsic mechanism parameters on L-LLC-BDC operatin...

This paper presents the basic characteristics of the digitally controlled boost type dc-dc converter. The static and dynamic characteristics of the dc-dc converter with the digital PID control are discussed. Especially, it is examined that the A-D conversion timing and anti-aliasing filter’s cut-off frequency affect the dynamic and static characteristics. As a result, when the anti-aliasing fil...

A compact and highly efficient unidirectional DC–DC converter is required as a battery charger for electrical vehicles, which will rapidly become widespread in the near future. The single active bridge (SAB) proposed simple high-frequency isolated converter, comprised of an H-bridge primary side, high frequency transformer, rectifying secondary diode output circuit. This paper presents novel, u...

This paper introduces a cutting-edge transformer technology – the piezoelectric transformer – currently considered as a potential candidate to replace magnetic transformers in resonant switching converters. Magnetic transformers are extensively used for providing step-up and step-down voltages while allowing input to output isolation in ac-dc and dc-dc converters. Even with the extensive use, t...

A new soft recovery (SR) quasi-resonant converter (QRC) having a multiple-order folding snubber network(MFSN) is introduced. It is obtained by combining a normal QRC with a folding snubber network of which the surrounding components are composed of passive devices only (diodes and capacitors). The reverse recovery loss of the main rectifier diode is eliminated by this method utilizing multiple ...

A Double input DC to DC converter for low voltage energy sources applications is proposed in this paper. The proposed converter is buck-boost converter which can step up or step down the input voltage according to output voltage required at load end. The converter is able to boost up voltage of energy sources such as solar photovoltaic and wind energy system of relatively low voltage. The conve...