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Presents the introductory welcome message from the conference proceedings. May include the conference officer(s) offer(s) congratulations to all involved with the conference event and publication of the proceedings record.
This paper introduces a novel isolated hybrid resonant converter with smooth transition between multiple operating modes. With the simple addition of a bidirectional ac switch, the highly-efficient series resonant converter operating in the discontinuous conduction mode (DCM) is combined with a phase-shifted full-bridge buck converter and a pulse width modulated (PWM) boost converter in order to provide...
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This paper analyzes the behavior of a pure capacitive output filter in parallel and series-parallel resonant converters. Unlike traditional resonant voltage-and current-driven rectifiers, pure capacitive output filters present interruptions in power transfer from the transformer primary to the secondary, owing to the existence of a parallel resonant capacitor. Therefore, existing formulas for different...
In this paper, a frequency-doubling LLC resonant converter with high step-down voltage gain for high input voltage applications is proposed. The three-level structure consisting two series half bridges is adopted in the converter to reduce the voltage stresses of the primary-side switches to only half of the input voltage. Thus the low-voltage rated power devices could be used to improve the converter...
An adaptive secondary-side digital control is proposed for the series resonant converter to solve the loss of ZVS under certain input and load conditions, making it a good candidate for MHz 48V voltage regulators (VRs). By means of varying AC equivalent resistance, the output voltage regulation is achieved by controlling the duty cycle of the synchronous MOSFET. An additional control variable has...
This paper proposes a digital online efficiency optimization technique for DC/DC Dual Half-Bridge Series Resonant Converters. The proposed technique implements an advanced modulation scheme which exploits the degrees of freedom inherently available in the converter modulation space in order to simultaneously regulate the output voltage and maintain the system in its maximum efficiency point. Furthermore,...
Integrated-magnetic interleaved-boost converters are under development for high-current, high-power applications ranging from automotive fuel cells to photovoltaics. This paper presents an investigation of the various continuous-current and discontinuous-current modes of operation of the integrated-magnetic interleaved two-phase boost converter. Experimental validation is presented from a low-power...
This paper presents the analysis of the mechanism of failure modes in bi-directional phase-shift full-bridge converters, composed of MOSFET, based on the circuit operation and parameters considering parasitic components of MOSFET. In addition, the relation between circuit operation and parameters are suggested through the experimental comparison. Using the relation, the suitable ranges of parameters...
The paper presents novel transformer-flux-balancing control methods for the isolated bidirectional full-bridge (FB) converter with active clamp and the bidirectional dual-active bridge (DAB) converter. Both approaches are based on the sensing and control of the transformer magnetizing current. For the isolated bidirectional FB converter the magnetizing current is obtained by sensing a single current,...
Multi-port DC/DC converters have been widely employed in stand-alone renewable power systems to provide stable and continuous power to the electrical loads. A full-bridge three-port converter (FB-TPC) interfacing a renewable source, a storage battery, and a load is proposed. The proposed FB-TPC integrates two Buck-boost converters into the primary side of the full-bridge topology, and the magnetizing...
This paper introduces a dual-mode hybrid zero-voltage/zero-current switching (ZVS/ZCS) circuit and a complementary controller for flyback converters operating in discontinuous conduction mode (DCM). The new ZVS/ZCS solution provides soft switching feature and high efficiency throughout the whole operating range. It also requires smaller components than other soft switching solutions [1]–[6]. To achieve...
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