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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...
In this paper, a current-fed asymmetric full-bridge LLCC resonant converter is proposed for the dielectric barrier discharge (DBD) applied to the surface treatment. Compared with a previous design, the asymmetric structure with no front-end buck circuit and only two reverse-voltage blocking diodes is adopted to reduce the component count and circuit complexity. Moreover, the phase-shift control of...
This paper proposes a single switch soft switching isolated converter. The proposed converter is able to offer low cost and high power density in high step up application due to the following features: ZCS turn on and ZVS turn off of switch and ZCS turn off of diodes regardless of voltage and load variation; simple gate driver circuit and low rated lossless snubeer; reduced transformer volume compared...
In light loading mode, most of the existing soft switching techniques have higher switching loss than their hard switching counterparts as the amplitude of the current in the resonant loop is greater than the load current of the switching instant point. To solve this problem, in the paper, a class of Current Adaptive Resonant Loop (CARL) soft switching PWM converters are proposed, in which, not only...
This paper introduces a unified modeling methodology to describe and explore the loss mechanism of resonant Switched Capacitor Converter (SCC) operating in a self-commutation zero current switching. The conventional equivalent resistance concept, which assumes a single conduction path of the resonant current, is generalized to model the losses in cases where the resonant current is divided across...
This paper introduces an enhanced differential power processor topology and principle of operation for photovoltaic systems (PV) that is based on switched-capacitor technology, featuring local maximum power point tracking (MPPT) capability, zero current switching (ZCS), high efficiency over wide operation range, and reduced size. The new converter operates as a voltage-dependent current-source and...
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