A systematic approach to the analysis and design of a bi-directional Cûk converter for the cell voltage balancing control of a series-connected lithium-ion battery string is presented in this paper. The proposed individual cell equalizers (ICE) are designed to operate at discontinuous-capacitor-voltage mode (DCVM) to achieve the zero-voltage switching (ZVS) for reducing the switching loss of th...

A new zero voltage switching current fed zero-voltage switching isolated boost converter topology for fuel cell applications is presented. L-type half-bridge is more suitable to low voltage, high current applications such as front-end dc–dc converters for the fuel cell applications. It has larger switch voltage rating and also suffers from high voltage across the switches. Clamping methods are ...

This paper analyses an off-nominal Class E ZVS amplifier, with R.F. supply choke and the switch on-duty ratio D = 0.5, to identify conditions for its high-frequency high-efficiency operation. Simple user-friendly analytical expressions essential parameters of amplifier have been derived subsequently validated by simulation experimental results. It has proven that can be optimized outperform nom...

Abstract A MOSFETs switching times calculation method for the known modulation strategy bidirectional buck + boost DC-DC converter is presented. former low-loss, constant-frequency based on a negative inductor offset current takes place at beginning of each conversion period which provides ability to turn converter’s MOSFET switches under zero-voltage and zero (ZVS/ZCS) condition. Time interval...

Zero voltage switching (ZVS) is useful to increase power electronics efficiency but difficult achieve due the non-linear parasitic capacitance of semiconductors and varying load current. This letter proposes a self-adaptive ZVS method by using intrinsic electroluminescence (EL) property SiC MOSFETs automatically adjust frequency in every cycle retain optimal A sensing circuit developed digitall...

<p>This paper introduces a high-performance zero-voltage-switching (ZVS) boost converter, which is capable to operate under different load currents. By utilizing matching network, the proposed topology can achieve ZVS over wide range of input voltages. Due switching loss minimized, circuit suitable for operation at frequencies on order several MHz. Steady-state analysis and detailed descr...

This paper presents the operation, analysis, design, simulation, and experimental results for a proposed Dual-Transformer DC-DC Resonant Converter (DTRC). A three-arm bridge is employed on input side an H-type output of DTRC, two bridges are connected with high-frequency (HF) transformers. By optimizing ratio k HF transformers, DTRC has lower boundary power losing zero-voltage switching (ZVS). ...