Abstract: This paper presents a single-stage alternating current (AC)/direct current (DC) light-emitting diode (LED) tube lamp driver for energy-saving indoor lighting applications; this driver features power-factor corrections and soft switching, and also integrates a dual buck-boost converter with coupled inductors and a half-bridge series resonant converter cascaded with a bridge rectifier i...

This work aims to enhance the ability of a direct current (DC) microgrid to guarantee the power supply without interruptions by considering the dynamic efficiency of each power converter in the power balance. Previous works show that the converter efficiency varies according to the instant power. If the variable efficiency of the converters in the microgrid is not considered, some extra power m...

Transverse flux permanent magnet linear generator (TF-PMLG) is widely used in direct drive wave energy converter (DD-WEC) because of its high power density. Traditional transverse machine (TFM) designed and built form translator-PM. But translator-PM configuration needs a large amount PM the cost long stroke application, like DD-WEC. Recently, stator-PM machines have gained more attention for r...

This paper presents a review of over a decade of research on Vertical Axis Wind Turbines (VAWTs) conducted at Uppsala University. The paper presents, among others, an overview of the 200 kW VAWT located in Falkenberg, Sweden, as well as a description of the work done on the 12 kW prototype VAWT in Marsta, Sweden. Several key aspects have been tested and successfully demonstrated at our two expe...

A high energy-efficiency switching scheme for a successive approximation register (SAR) analogue-to-digital converter (ADC) is presented. The proposed method can achieve 98.4% savings in switching energy when compared to a conventional SAR. The proposed technique also achieves a 4 × reduction in total capacitance used in the digital-to-analogue converter (DAC) compared to the conventional DAC.

A novel approach for direct analog-to-residue conversion is presented in this chap/er using the most popular sigma-della analog-to-digital converter. This converter provides high resolulion. high conversion speed and a low cost for implementation. The non-positional nature (~f RNS makes it suitable for fault-toleranl architectures. The error detection and correction properties (?f Redundant Res...

A multiport converter promises cost-effective, flexible and more efficient energy processing by utilizing only a single power stage. Multiport converters, a promising concept for alternative energy systems, have attracted increasing research interest recently. Zero Voltage Switching (ZVS) alleviates the switching losses and improves the converter overall efficiency. Zero voltage switching can b...

Received Jan 8, 2018 Revised Mar 23, 2018 Accepted Apr 11, 2018 Distributed energy source based electricity generation is an essential factor for the economic growth and development of a country. The photovoltaic, fuel cell and battery based power generation offer a high voltage gain. The DC-DC CUK converter based on both buck and boost mode of operation is proposed for high gain dc link voltag...

The central part of an energy storage system is the DC-DC converter which connects the ultracapacitor pack or the battery pack and a DC bus of an energy system. In this paper the bi-directional converter which operates in discontinuous conduction mode is designed in order to reduce the costs and remove the current control loop in each phase. High current ripples associated with this mode operat...