This paper proposes a reconfigurable dual-active-bridge (DAB) converter that is capable of switching between two structures for enhancing its performances at different output power levels. For 50%-100% load, the operates in full-bridge mode and achieves soft-switching all switches independently input-to-output voltage ratio. Below 50% reconfigured to operate half-bridge reduced circulating current improved light-load efficiency while maintaining desired characteristic mode. The achievement...

Leakage and magnetizing inductances of a loosely coupled transformer are constantly changing due to the relative positions primary secondary windings in inductive power transfer systems. In order counteract nonnegligible extract desirable characteristics from system, various compensation networks have been proposed obtain unity input factor constant output voltage for minimum reactive ease control battery charging or other electronic applications. However, most existing methods with fixed...

This paper proposes a fifth-order resonant immittance network based dual-active-bridge (DAB) converter and an optimal modulation method that will ensure high-efficiency operation of the under wide-range variations in voltage ratio output power level. The proposed is on concept total loss minimization, where model developed optimization algorithm formulated to compute set internal external phase shift parameters lead maximum efficiency for given operating including It found maintain level,...

Efficiency optimization of dual-active-bridge (DAB) converters involves the minimization both conduction and switching losses. However, it is challenging to achieve these two objectives simultaneously due their conflicting nature, i.e., circulating current required realize zero-voltage (ZVS) but presence an excessive amount main cause loss low efficiency. This dilemma has been common conventional DAB converter topologies modulation schemes which cannot provide sufficient degrees freedom...

Switching loss and conduction are two main mechanisms in dual-active-bridge (DAB) converter the degree to which they affect efficiency of DAB depends on chosen power modulation scheme. In general, no single scheme will perform optimally under all operating conditions. this article, a hybrid new topology designed for its realization presented. The is switch between operation modes-dynamic frequency matching (DFM) medium- full-load condition enhanced dual-phase-shift (EDPS) light-load...

A new single-stage ac-dc resonant DAB converter and modulation scheme is proposed. The network based on a tuned structure that ensures unity-power-factor operation at both ports. Due to the immittance characteristic of network, low-frequency ac input current directly controllable by means modulating dc-side switches according prescribed reference generated closed-loop control. proposed achieves soft switching for all ac-side least half switches. It also results in reduced rms bridge conduction loss.

A three-phase dual-active-bridge (3p-DAB) converter is an attractive topology for bidirectional power conversion in high-power applications. However, conduction and switching losses are two main loss mechanisms that severely affect its efficiency performance, adoption of any single modulation scheme or cannot minimize these over a wide operating range. For this purpose, reconfigurable the 3p-DAB proposed article utilizes tunable resonant network to offer multiple degrees freedom minimizing...

This paper presents an isolated three-port ac-dc converter with vehicle-to-grid (V2G) reactive power capability. Port 1 of the proposed is interfaced AC through a matrix while 2 and 3 are connected respectively to supercapacitor (SC) battery. The SC can be charged by receiving active from grid, also provide grid when regulation required. While charges battery in port does not charge directly grid. As such, serves as energy buffer ensures pulsation-free transfer In addition, tuned...

A new single-stage three-phase resonant ac-dc matrix-based converter is proposed. It uses a modulation scheme designed for use with tuned LCL network that achieves unity power factor at both ports, which leads to reduction in rms bridge currents and conduction loss. The line-frequency phase are controllable by modulating the ac-side dc-side switches according space vector voltage user-prescribed current references.

The Internet of Things (IoT) system proposed in this paper is an advanced solution for monitoring the temperature and humidity lay-up production line at Company A, a composite panel manufacturing company aircraft wing components. data visible over internet through cloud based platform sending alert messages when out control range. Wireless Sensor Network (WSN) consists DHT11 sensor to detect humidity, NodeMCU WiFi module send into ThingSpeak IoT platform. will be displayed on LCD screen GSM...

A structurally reconfigurable DAB converter is proposed to minimize both conduction and switching losses. For 25% 100% rated load, a new modulation scheme achieve zero circulating current, backflow power, full-range ZVS. Below it transitions smoothly the Enhanced-Dual-Phase-Shift (EDPS) which maintains power

A single-phase and three-phase grids compatible Vehicle-to-Grid (V2G) Electric Vehicle (EV) on-board bidirectional charger is proposed. The power stage control method are configurated according to the grid voltage condition charge/discharge command. An adaptive was derived ensure minimum circulation loss of DC/DC across output range. liquid-cooled 11kW prototype proposed developed experimentally verified. It achieved 96.5% maximum conversion efficiency 1.5kW/L density. V2G enables...

A new single-stage three-phase resonant ac-dc quad-active-bridge (QAD) converter is proposed. It uses a modulation scheme designed for use with tuned LCL network that achieves unity power factor at both ports, which leads to reduction in rms bridge currents and conduction loss. The line-frequency phase are individually controllable by modulating the ac-side dc-side switches according user-prescribed current references.

A single-stage direct ac-dc bidirectional resonant converter is proposed. It features natural power factor correction and theoretically gives rise to an ideal sinusoidal ac current. confines high-frequency circulating current one bridge as a means reduce conduction loss. Zero-current switching achieved in all ac-side switches while zero-voltage at least two dc-side switches. Simulation experimental results are presented verify the proposed modulation strategy.

Switching loss and conduction are two main mechanisms in DAB converter the degree to which they affect efficiency of depends on chosen power modulation method. In general, no single method will perform well all operating conditions. this paper, a hybrid scheme new topology designed for its realization presented. The is switch between operation modes: dynamic frequency matching (DFM) enhanced dual-phase-shift (EDPS) modulation. Under DFM modulation, zero backflow power, circulating current,...

This paper proposes a dynamic series/series-parallel (S/SP) compensation network based on switch-controlled capacitor (SCC) for matching the series and parallel resonant frequencies of such that magnetizing inductance transformer can be adaptively compensated under different air gaps/misalignments. As result, requirements load-independent voltage output unity input power factor simultaneously fulfilled coupling conditions by single-stage converter. An experimental prototype with gap ranging...