Conventional switch-mode LED drivers have problems such as poor performance in harmonic distortion, flickering, power factor correction, stresses on the switches, high switching losses, large size, and cost. To resolve these problems, we propose a long-life driver with ability of correction. The proposed system is based integration half-bridge LLC resonant converter two boundary-conducted boost...

This paper explores the design of a Class-E amplifier with finite DC-feed inductance using three tuning methods. Furthermore, this work quantifies impacts process (referred to in as effect) on main figures merit (FoMs) amplifier. The goals were guarantee two conditions: zero voltage and derivative switching (i.e., soft-switching tuning). To best authors’ knowledge, systematic methods have not b...

Triangular-current-mode (TCM) modulation guarantees zero-voltage-switching across the mains cycle in AC-DC power converters, eliminating hard-switching with a minor ≈ 30% penalty conduction losses over conventional continuous current mode (CCM) scheme. TCM-operated however, include wide variation both switching frequency and switched cycle, complicating an analytical description of key operatin...

A new output structure for class E power amplifier (PA) is proposed in this paper. A series LC resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. This resonator causes low impedance at the second harmonic. The output circuit is designed to shape the switch voltage of the class E amplifier and lower the voltage stress of the transistor. T...

Based on the loss distribution and efficiency analysis, a comparative study between a series resonant three-port bidirectional DC-DC converter (SR-TBC) and a multi-resonant three-port bi-directional DC-DC converter (MR-TBC) is reported here. By using the Fourier equivalent analysis method in hand, the resonant current, switching current expressions, zero voltage soft switching (ZVS) conditions ...

Abstract – A novel parallel three-level zero voltage switching (ZVS) DC converter is presented for medium voltage applications. The proposed converter includes three sub-circuits connected in parallel with the same power switches to share load current and reduce the current stress of passive components at the output side. Thus, the size of the output chokes is reduced and the switch counts in t...

A capacitive wireless power transfer (C-WPT) system uses an electric field to transmit power through a physical isolation barrier which forms a pair of ac link capacitors between the metal plates. However, the physical dimension and low dielectric constant of the interface medium severely limit the effective link capacitance to a level comparable to the main switch output capacitance of the tra...

In this paper, a parallel modular multi-inverter (PMMI) topology is proposed to supply high power for wireless charging electric vehicles (EVs). A major challenge in the implementation of PMMI zero-voltage switching (ZVS) all inverters avoid high-frequency losses. Therefore, centralized-ZVS control and master–slave frequency following (MSFF) strategy are presented realize ZVS PMMIs by single co...

This study presents a new high step-up converter based on the voltage multiplier cell and coupled inductor for renewable energy applications such as fuel photovoltaic power systems. achieves conversion ratio using (VMC). The acts passive clamp circuit reduces maximum across switch. suggested topology has only one switch in its structure, which leads to low cost volume. other benefits of propose...