Power Converter Research Papers - Academia.edu (original) (raw)

2025, 2006 37th IEEE Power Electronics Specialists Conference

A growing demand for deployment of autonomous sensors and sensor networks is leading to a subsequent increase in the demand for localized, independent energy harvesting capabilities for each node. In this paper, a method of remote area wind energy harvesting is presented, with a focus on an anemometer-based solution. By utilizing the motion of the anemometer shaft to turn a compact alternator, small amounts of power can be harvested from otherwise unavailable sources. Energy harvested is converted to battery potential via a pulsed buck-boost converter operating in discontinuous conduction mode (DCM). It is found that maintaining a constant input resistance at the input port of the converter biases the alternator to operate at its peak power point over a wide range of wind speeds. Results show that power harvesting capability using the discussed alternator and power converter solution are in the range of tens to hundreds of microwatts up to approximately one milliwatt. This power is passed to the central system batteries, providing a trickle-charge. As a result, sensor nodes incorporating this harvesting solution have an increased field lifetime. High overall efficiency is maintained over a wide range of potential wind speeds, with little impact on anemometer measurement accuracy.

2025, Sustainable Energy, Grids and Networks

One of the fundamental concerns in the operation of modern power systems is the assessment of their frequency stability in case of inertia-reduction induced by the large share of power electronic interfaced resources. Within this context, the paper proposes a framework that, by making use of linear models of the frequency response of different types of power plants, including also gridforming and grid-following converters, is capable to infer a numerically tractable dynamical model to be used in frequency stability assessment. Furthermore, the proposed framework makes use of models defined in a way such that their parameters can be inferred from real-time measurements feeding a classical least squares estimator. The paper validates the proposed framework using a full-replica of the dynamical model of the IEEE 39 bus system simulated in a real-time platform.

2025, Tanzania Journal of Engineering and Technology

With the increased demand for high-reliability power converters in the
electric drive-train and propulsion systems, the efforts to design and
analyze converters with high fault tolerance have become apparent.
Among the emerging trends to improve the reliability of power
converters is the incorporation of dual-buck (DB) structures in
traditional converter topologies. Thus, this paper studies a singlephase dual-buck structured three-level flying capacitor (FC) inverter.
The dual-buck flying capacitor (DBFC) inverter was constructed in
such a way as to suppress the shoot-through problems that may occur
because of the switching mismatch and gate driver delay, as exhibited
in the traditional FC inverter. The detailed operation of the DBFC
inverter was performed using a comparative analysis of the traditional
FC inverter as a benchmark. It was noted that the DBFC inverter
considerably reduces the current stress on some switches and mitigates
the shoot-through problem. Moreover, it was inferred that apart from
improving the reliability of the inverter, the DBFC inverter reduces the
total harmonic distortion (THD) of the output current. The 98.8%
maximum efficiency and 4.03% THD were depicted in the DBFC at a
switching frequency of 40 kHz. The results of the study were validated
using detailed simulations and preliminary experiments.

2025

energize July 2006 Page 56 Electrostatic precipitators (ESPs) have been in commercial operation since the early part of the 20th century. Major applications are in the prevention of particulate pollution arising from electricity generating plant and industry. The principle of operation is that gas borne particles are passed into an electric field comprising of an arrangement of discharge electrodes and collectors, where they are first charged and then, as charged particles, migrate through the field and are deposited on the collectors. To ensure the process is continuous the collectors are either mechanically rapped in a dry application or liquid washed in a wet application, to remove the deposited materials.

2025, Indonesian Journal of Electrical Engineering and Informatics (IJEEI)

Electrical power quality (EPQ) in distribution systems is a critical issue for commercial, industrial and residential applications. The new concept of advanced power electronic based Custom Power Devices (CPDs) mainly distributed static synchronous compensator (D-STATCOM), dynamic voltage restorer (DVR) and unified power quality conditioner (UPQC) have been developed due to lacking the performance of traditional compensating devices to minimize power quality disturbances. This paper presents a comprehensive review on D-STATCOM, DVR and UPQC to solve the electrical power quality problems of the distribution networks. This is intended to present a broad overview of the various possible DSTATCOM, DVR and UPQC configurations for single-phase (two wire) and three-phase (three-wire and four-wire) networks and control strategies for the compensation of various power quality disturbances. Apart from this, comprehensive explanation, comparison, and discussion on D-STATCOM, DVR, and UPQC are presented. This paper is aimed to explore a broad prospective on the status of D-STATCOMs, DVRs, and UPQCs to researchers, engineers and the community dealing with the power quality enhancement. A classified list of some latest research publications on the topic is also appended for a quick reference.

2025, Indonesian Journal of Electrical Engineering and Informatics (IJEEI)

The voltage events namely voltage sags and voltage swells represent the most common, frequent and important power quality events in today's power system. Dynamic voltage restorer (DVR) is one of the key components used to mitigate the supply voltage quality disturbances in terms of voltage sags and swells in the distribution system. It consists of an energy storage unit, a voltage source inverter, a filter, a coupling transformer and the control system. This paper presents three different inverter configurations of dynamic voltage restorer (DVR) for mitigation of voltage events such as voltage sags and swells with sudden addition or removal of the nonlinear load. These three configurations are voltage source inverter based DVR (VSI-DVR), current source inverter based DVR (CSI-DVR) and impedance or Z-source inverter based DVR (ZSI-DVR). The d-q control technique is used to control the operation of the DVR. The response of ZSI-DVR for mitigation of voltage sags and swells are investigated and compared with VSI-DVR and CSI-DVR using MATLAB/SIMULINK environment.

2025, Indonesian Journal of Electrical Engineering and Computer Science

This paper describes the comparative analysis of three different control techniques of distributed flexible AC transmission system (DFACTS) controller called as distributed static synchronous compensator (DSTATCOM), aimed at power quality (PQ) enhancement in terms of voltage sag mitigation in a threephase four-wire (3p4w) distribution system. A DSTATCOM is one of the major power quality improvement devices which consist of a DC energy source, a voltage source inverter (VSI), a filter, a coupling transformer and the control system. The control strategy based on synchronous reference frame (SRF) theory, instantaneous active and reactive current (IARC) theory and propositional-integral (PI) controller has been used for reference current generation of voltage source inverter (VSI) based DSTATCOM. The SRF, IARC and PI control based DSTATCOM is validated through dynamic simulation in a MATLAB\SIMULINK environment under linear as well as nonlinear loads.

2025, IEEE Transactions on Industrial Electronics

A discrete-time proportional integral derivative (PID) controller, the manipulated variable of which takes two values, i.e., ON and OFF, is proposed and analyzed. Oversampling technology is employed in the controller design. As to the structure of the controller, a cascade type and a built-in type are proposed. An experimental example is presented.

2025, Mathematical and Computer Modelling of Dynamical Systems

Infinite-dimensional port-Hamiltonian representation of irreversible processes accounting for the thermal energy domain is presented. Two examples are studied: the transmission line and a non-isothermal reaction diffusion process. The proposed approach uses thermodynamic variables in order to define the infinite-dimensional interconnection structure linking the different phenomena. A presentation is given for one-dimensional spatial domain. For the transmission line, the Hamiltonian is the total energy and for the reaction diffusion process it is the enthalpy or the opposite of entropy.

2025, 2011 IEEE Conference on Clean Energy and Technology (CET)

This research aimed to design a three-phase ac-dc buck converter to achieve low-THO unity-power-factor sinusoidal input current and regulated dc voltage via modified pulse-width-modulation (PWM) technique. A 6-switch topology with bidirectional power flow capability is presented. The modified PWM switching strategy is discussed and verified via Matlab-Simulink and implemented in Digital Signal Processor (DSP) TMS320F28335. The topology and the switching technique performed well for sinusoidal input current, power factor, harmonic distortion level of the ac input currents, and regulated dc voltage, and enabled return of power flow from the dc side back to the ac. Simulation using Matlab-Simulink is presented to verify the effectiveness of the circuit configuration.

2025, EUROCON 2011 - International Conference on Computer as a Tool - Joint with Conftele 2011

This paper presents the analysis and design of a DC-DC series resonant power converter used as a contactless battery charger (5V DC -1A) for a mobile electronic device. The system is enclosed in a sealed spherical pack containing temperature and humidity wireless sensors for real time composting process monitoring. Some particular characteristics of the device and its physical dimensions impose a maximum distance between the primary and the secondary transformer windings of 20mm. For transformer type core and windings configuration selection criteria, an experimental characterization of loosely coupled power transformers was evaluated. Both simulation and experimental results, obtained in a 150kHz laboratory prototype, were used as evidence of the developed theoretical models and analysis.

2025

This paper presents a gate driver topology designed in a GaN on Si technology to be implemented on the same substrate with a 650-V, 500-mΩ power GaN switch. The driver consists of three buffer stages, three anti-cross conduction networks, two level shifters, and three bootstrap capacitors. Simulations of the proposed GaN driver are presented and a comparison with the conventional solution, assuming the same static current consumption, is provided. The proposed circuit not only solves cross-conduction problems, which are crucial for the limitation of undue dynamic power consumption, but it is also aimed at limiting static current consumption by using a bootstrap technique. Simulations show that the power GaN transistor driven by a 6-V, 2.5-MHz PWM signal with 50% duty cycle through the proposed driver, reaches a nominal switching speed as high as 50 V/ns at 27 °C, with an average current consumption of about 1 mA, over the entire range of temperature from −40 °C to 150 °C.

2025, IEEE Transactions on Power Electronics

The 100 MVA intertie is mainly characterised by the following innovations: hard driven GTO (HD-GTO) with a new housing series connection of hard driven GTOs low-inductive high power HD-GTO inverter valve fuseless high power HD-GTO inverter. The presented hard driven GTO technology allows the robust, reliable and cost-efficient series connection of GTOs. The concept of the 100 MVA intertie, which is based on the HD-GTO technology, is reviewed. The development of the high power HD-GTO inverter module according to a state-of-the-art development process is presented. With the use of a circuit simulator with accurate physical models of the power semiconductors, especially the concept phase, the development phase and the verification phase have been supported.

2025, IEEE Transactions on Industry Applications

Use of multilevel inverters has become popular in recent years for high-power applications. Various topologies and modulation strategies have been investigated for utility and drive applications in the literature. Trends in power semiconductor technology indicate a tradeoff in the selection of power devices in terms of switching frequency and voltage-sustaining capability. New power converter topologies permit modular realization of multilevel inverters using a hybrid approach involving integrated gate commutated thyristors (IGCT's) and insulated gate bipolar transistors (IGBT's) operating in synergism. This paper is devoted to the investigation of a hybrid multilevel power conversion system typically suitable for high-performance high-power applications. This system, designed for a 4.16-kV 100-hp load is comprised of a hybrid seven-level inverter, a diode bridge rectifier, and an IGBT rectifier per phase. The IGBT rectifier is used on the utility side as a real power flow regulator to the low-voltage converter and as a harmonic compensator for the high-voltage converter. The hybrid seven-level inverter on the load side consists of a high-voltage slow-switching IGCT inverter and a low-voltage fast-switching IGBT inverter. By employing different devices under different operating conditions, it is shown that one can optimize the power conversion capability of the entire system. A detailed analysis of a novel hybrid modulation technique for the inverter, which incorporates stepped synthesis in conjunction with variable pulsewidth of the consecutive steps is included. In addition, performance of a multilevel current-regulated delta modulator as applied to the single-phase full-bridge IGBT rectifier is discussed. Detailed computer simulations accompanied with experimental verification are presented in the paper.

2025

The suitability of the direct modular multi-level converter for high power, low speed, gear-and transformerless drives is investigated. Control methods which optimize the capacitor voltage ripple are presented, analyzed and verified in... more

2025, International Transactions on Electrical Energy Systems

e power electronic interface is critical in matching a distributed generation (DG) unit's characteristics to grid requirements as most DG technologies rely on renewable energy. Increased adoption of electric vehicles (EV) is seen as a positive step toward minimizing air pollution as well as carbon emissions. Rapid proliferation of electric vehicles as well as charging stations has exacerbated voltage quality as well as harmonic distortion difficulties, which harm the efficiency of combined renewable energy. is research proposes novel hybrid design techniques in control systems that enhance the energy efficiency of electronic converters for power electronics. e control system enhancement has been carried out using a hybrid energy storage electric convertor, and energy efficiency is improved using a synergetic battery reference adaptive controller. A plug-in hybrid electric vehicle (PHEV)'s internal combustion engine with a small photovoltaic (PV) module is utilised to assess a proposed control method which effectively regulates electric power on-grid by draining electricity from batteries during peak hours as well as then charging them during off-peak times, lowering the load on the converter as well as allowing electric vehicles to charge faster. Experimental results show the constant acceleration case obtained battery current of 92 Amps, ultracapacitor current of 89 Amps, charging voltage of 88 V, DC load current of 85 Amps, battery SOC of 72%, and the time-varying acceleration proposed technique obtained current of 94 Amps, and ultracapacitor current of 90 Amps, charging voltage of 90 V, DC load current of 82 Amps, battery SOC of 79%.

2025, IET Cyber-Physical Systems: Theory & Applications

Decentralization of generation and increasing utilization of information communication systems bring challenges to present power system modeling approaches. This work applies functional modeling for monitoring and modeling of distributed energy resources, with wind turbine generator (WTG) application as a case study. First, we established a functional model of a generic WTG through the multilevel flow modeling approach. The model acts as basis of a state estimator (SE) for monitoring the WTG. Afterwards, the application of the SE is extended for wind power plant monitoring and control. The case study results show that the SE can efficiently limit the impact of information errors from different data integrity attacks during active power curtailment.

2025, 2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion

In this paper, a rotating contactless power transfer system achieving 200W for space application is presented. Both transformer and electronics designs are presented. A proof-ofconcept prototype, making use of components with space grade... more

2025, IEEE Transactions on Power Electronics

Power converter efficiency is always a hot topic for switch mode power supplies. Nowadays, high efficiency is required over a wide load range, e.g., 20%, 50% and 100% load. Computer-aided design optimization is developed in this research work, to optimize off-line power converter efficiency from light load to full load. A two-stage optimization method to optimize power converter efficiency from light load to full load is proposed. The optimization procedure first breaks the converter design variables into many switching frequency branches. In each fixed switching frequency branch, the optimal designs for 20%, 50% and 100% load are derived separately in the first stage, and an objective function using the optimization results in the first stage is formed in the second stage to consider optimizing efficiency at 20%, 50% and 100% load. Component efficiency models are also established to serve as the objective functions of optimizations. Prototypes 400V to 12V/25A 300W two-FET forward converters are built to verify the optimization results.

2025, Chemical Engineering Transactions

Battery has been widely used in the storage of new energy. In this paper, we focus on the research of the controller design of a battery charging system, in which an isolated dual converter is used for energy conversion. In practical applications, the performance of the battery charging system is always affected by the uncertain circuit parameters. In order to improve its dynamic and steady performance under various uncertainties, a sliding mode control (SMC) strategy is proposed in this paper for the control of the battery charging system. First, the working principle of the isolated dual converter with parameter uncertainties is analyzed in this paper. Then, based on the model of the battery charging system, a SMC strategy based on the Pulse Width Modulation (PWM) method is designed and analyzed in this paper. The influence of variation of switching frequency on the controller parameters design is also discussed in this paper. Finally, simulation results show that, compared with t...

2025, IEEE Transactions on Industrial Electronics

This paper presents a regenerative step-up/stepdown dc-dc zero-voltage-switching pulsewidth-modulation converter with active clamping. The switch losses are reduced due to the implementation of a simple active snubber circuit that provides soft commutation in all the switches of the converter. The theoretical analysis, basic equations, design methodology, and experimental results are shown in this paper. A control methodology to assure the output voltage regulation is also proposed. The main advantages of the proposed power converter are the small number of components, simplicity of the controller, robustness, small weight and size, and high efficiency.

2025, IEEE Transactions on Industrial Electronics

2025, Proceedings of APEC 97 - Applied Power Electronics Conference

Computer and telecommunication systems tend to demand lower supply voltages than 3.3V. This fact raises the challenge of obtaining high efficiency DC/DC converters with low output voltage. We have implemented a compact converter with an output voltage of 1.5V. The output power is 5W and the converter has been provided with galvanic isolation between input and output sides. The windings of the magnetic components are directly integrated in the PCB, which allows to reduce the size. Self driven synchronous rectification allows to obtain very high efficiency (81.2% at nominal conditions, 85.3% maximum) for such a low output voltage.

2025, IEEE Transactions on Power Electronics

2025, IEEE Transactions on Energy Conversion

2025, International Journal of Electronics

Average modelling of PWM converters is reexamined in the light of the behavioural-dependent sources now included in modern versions of electronic circuit simulators. A topology-independent behavioural model is developed to emulate the operation of PWM converters in voltage and current modes, for continuous and discontinuous inductor current cases. It is shown that the operation of the switching part involves, in general, three behavioural blocks: the generic switched inductor model, the duty cycle generator and the inductor current generator. Explicit expressions and equivalent circuits are developed for all possible modes of operation and a PSpice (MicroSim Inc., Irvine, CA) netlist template is appended.

2025

This paper explores the application of Superconducting Magnetic Energy Storage (SMES) based Dynamic Voltage Restorer (DVR) systems to improve voltage sag and swell issues in Sri Lanka's low voltage three-phase power system. Voltage sags and swells are critical power quality problems that can cause significant disruptions in both residential and industrial sectors. Voltage sags, often caused by short circuits, motor startups, or sudden increases in load, and voltage swells, typically resulting from abrupt load drops or capacitor bank switching, are common in industrial settings. The integration of SMES with DVR technology offers a promising solution by providing rapid and precise voltage correction. This study analyses the operation principle of the SMES-based DVR and designs the DVR output voltage control method using MATLAB SIMULINK [1]. Voltage sags and swells are detected using a power quality analyzer connected to the low-voltage three-phase power system. The collected data are used to simulate voltage sags and swells in MATLAB. The models of the SMES-based DVR are established, and simulation tests are performed to evaluate system performance. The results demonstrate significant improvements in voltage regulation, highlighting the feasibility and effectiveness of SMES-based DVR systems in enhancing power quality and reliability in Sri Lanka's low-voltage distribution network [2].

2025, Lecture Notes in Control and Information Sciences

Control system design of switching power converters and electrical machines based on the sliding mode approach is presented. The structural similarities among switching converters and electrical machines are used to show that the same structure of the controller could be used for plants under consideration. The controller is designed as a cascade structure with inner current loop designed as a sliding mode system with discontinuous control and outer loop (voltage or mechanical motion) being designed as a discrete-time sliding mode controller.

2025

Este trabalho propoe uma analise da operacao em malha fechada de um sistema de geracao distribuida para conexao em um sistema trifasico a quatro fios, a partir do controle de um inversor trifasico a quatro bracos. A estrategia de modulacao adotada para este inversor e determinada pelo metodo de controle preditivo baseado em modelo (MPC - Model Predictive Control). Justificativas para a utilizacao dessa topologia e do metodo de controle sao discutidas. A estrutura escolhida para o controle preditivo MPC objetiva o fornecimento de potencia ativa e reativa pelo inversor tendo em vista a maximizacao do fator de potencia medido a partir da fonte pela fonte CA a quatro fios (Y-n). Quatro casos sao abordados para analise da proposta no inversor trifasico a quatro bracos e dois casos para um inversor trifasico em ponte completa (3F) para efeito de comparacao. Baseando-se no monitoramento das potencias eletricas envolvidas e nas demais grandezas de interesse, foi possivel concluir que os res...

2025, 2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition

At present, digital control solutions are becoming more attractive than analog implementations in some power converter applications owing to easy design of complex control strategies and control reconfigurability. This paper proposes and validates the digital implementation of an asynchronous Linearnon-Linear (LnL) compensator to improve the dynamic response of interleaved buck converters. It is important to highlight that the same digital LnL compensator is able to keep the dynamic response even with a very important variation of the power stage parameters, such as the output filter or the switching frequency. I.

2025

Energy harvesting is the process by which energy is derived from the external sources from hydropower, solar energy and many more. This project involves in the design and characterization of vibration based electromagnetic energy harvester system. This type has high potential to be investigated and utilized. The main purpose of this project is to improve the previous design and suitable to be used for low power applications such as the wireless sensor network. In developing the new prototype, both electrical and mechanical improvement of the previous design are considered. Utilizing the fundamental Faraday's law, it serves as a succinct summary of the ways a voltage (or emf) may be generated by a changing magnetic environment. The expectation of the new prototype is the improvement of the overall efficiency in both the output power and also bandwidth. The prototype is design using the engineering software tools such as AutoCAD. Finally, the completed design will be followed by device fabrication. To investigate the performance of the prototype, both the electrical and mechanical characterization have been performed such as the open and close loop voltage, impedance matching, resonant frequency and bandwidth. From the characterization process, it was found that the open-loop and close-loop voltage produces by the device is 5.729 V and 2.920 V, device internal resistance is 560  , device resonant frequency occurred at 29.4 Hz and device bandwidth 9 Hz which are better than the previous prototype. I am thankful to Dr Mohd Haris Md Khir for his help and support in guiding me until to the successful of this final year project. His guidance's have helped me achieve several important insights regarding to my project. I also would like to thank Mr Khalid Asyraf, a PhD student for assisting me in the testing stage and his time providing me the necessary detail about my project. My appreciation also goes to Universiti Teknologi PETRONAS especially to the Electrical and Electronics Engineering Department, by providing me the necessary assets and resources, not only to accomplish my task but also to enrich my knowledge further. Last but not least, I offer my regards to those who support me especially all my friends and technicians in both departments, Mechanical and Electrical Department for contributing their assistance and ideas for finishing this project. v LIST OF TABLES .

2025, IEEE

In this paper, a novel method is developed to control switched DC-DC Buck converters. The circuit dynamic is described as an affine linear switched system. Utilizing switched systems theory, a switching state-feedback law is derived to asymptotically stabilize the desired equilibrium point and also minimize a guaranteed cost. The efficiency of the proposed method is illustrated by simulation which verifies the improvement of the obtained results compared with the literatures.

2025

In this paper it is shown the variation of the rotor resistance and the dispersion reactance , magnitudes reduced at the stator in coparison with the charge. ' 2 R ' 2 X

2025, AIP Conference Proceedings

The importance of effective energy conversion control, including power generation from renewable and environment-friendly energy sources, has increased due to rising energy demand. Power electronic systems for controlling and converting electrical energy have become the workhorse of modern society in many applications, both in industry and in the home. Power electronics plays a very important role in traction and can be considered as workhorse of robotics and automated manufacturing systems. Power semiconductor devices are the key electronic components used in power electronic systems. Advances in power semiconductor technology have improved the efficiency, size, weight and cost of power electronic systems. At present, IGCTs, IGBTs, and MOSFETs represent modern switching devices. Power integrated circuits (PIC) have been developed for the use of power converters for portable, automotive and aerospace applications. New materials (SiC and GaN) have been introduced for advanced applications. This paper reviews the state of these devices and elaborates on their potentials in terms of higher voltages, higher power density, and better switching performance.

2025

Analysis of the dynamic sharing currents at turn-on process in power PWM inverter system with switching Metal-Oxide-Semiconductor-Field-Effect-Transistors (MOSFET's) connected in parallel is presented. The inverter circuit presented in this paper is low power inverter which can be used as a charger too. The influence of the diferent rise time driving signals and parameters mismatch between parallel MOSFET branches, over wide operating ranges is analyzed, resulting in dynamic currents, transition energy unbalance, time delay on switching process of parallel MOSFET's, and time delay at output voltage of inverter. One of many potential causes of mismatch parameters is the threshold voltage V th . Results are presented for the time delays during On switching of the parallel branches in inverter with five power MOSFET's in each of two legs, selecting same threshold voltage initially, for various rise time driving signals of the two legs of inverter when only one MOSFET in particular leg has lower threshold voltage than others.

2025

Analysis of the dynamic sharing currents at turn-on process in power PWM inverter system with switching Metal-Oxide-Semiconductor-Field-Effect-Transistors (MOSFETs) connected on parallel is presented. The inverter circuit presented in this paper is low power inverter which can be used as a charger too. The influence of the parameters mismatch between parallel MOSFET branches, over wide operating ranges is analyzed, resulting in dynamic currents, transition energy unbalance, time delay on switching process of parallel MOSFETs, and output voltage. One of many potential causes of mismatch parameters is the threshold voltage V th. Results are presented for the time delays during On switching of the parallel branches in inverter with five power MOSFETs in each of two legs, selecting same threshold voltage initially and for the case where only one MOSFET in particular leg has lower threshold voltage.

2025, ETRI Journal

Multilayer inverters (MLIs) play an important role in their efficiency and effectiveness. This study proposes a new MLI that is optimally adapted using DQZ control and a vague neurological approach for tracking the single maximum power... more

2025, IEEE Transactions on Appiled Superconductivity

single-phase, thermally switched superconducting converter operating at the mains frequency is being developed and tested in our institutes. Typical design values of the device are: input voltage of 220 V , input current of 7 A; output voltage of 1 V, and current of 1 kA. The average output power is about 750VA, with an efficiency better than 96%. Test results of the full scale converter while ramping up and down superconducting magnet and a comparison with the theory are presented. The converter will be installed as a part of a power supply system controlling the current of a separator magnet located in Ukraine for an iron ore recycling process.

2025, Australasian Universities Power Engineering Conference

Effective utilization of the thyristorly controlled shunt elements to power system transient stability enhancement requires a strategy of the optimal simultaneous active and reactive power control. A strategy of such optimal control is derived in the paper from direct Lyapunov method as the strategy which forces the fastest dissipation of the total system energy in the transient state. This theoretical control strategy uses two control signals based on the state variables localiy not available at the shunt element bus. It is proved in the paper that both theoretical signals can be replaced by the time derivative of two electric quantities derived from local measurements. Control algorithm based on these quantities gives smooth and very effective regulation. Tests done for two and multi-machine systems have confirmed validity and robustness of the proposed new control trategy and control signals.

2025, 2006 IEEE International Power Electronics Congress

An experimental evaluation of a dynamical slidingmode control for power converters which has been recently proposed is presented in this paper. This controller is endowed with notable characteristics predicted in theory and observed in simulations, among others: it is robust under load and input voltage variations and does not require current measurements. Although it is highly nonlinear, it is easy to implement. Fur- thermore simple conditions for stability have been provided. All this characteristics are evaluated in practice in this work. The design procedure is presented by means of an example and implementation details are thoroughly explained.

2025

En el cursillo construiremos algunos lugares geométricos por medio de envolventes de familias de curvas. Iniciamos con algunas construcciones básicas que se pueden desarrollar con instrumentos de trazo, continuamos con construcciones de lugares geométricos, instancia en la que resulta más útil apoyarse en la geometría dinámica (e.g., GeoGebra). Finalizaremos con un proceso en doble vía para asociar lugares geométricos con sus ecuaciones.

2025, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129)

The paper describes analysis, design and prototyping in reduced scale of a digitally controlled inverter for uninterruptible power supply (UPS) applications. The converter is rated for 100 kVA nominal power and 400 Hz, three-phase, 220 V sinusoidal output voltage. The final equipment is meant to be installed in airport docks and used as the aircraft's electrical power supply during refuelling and loading operations. It will be manufactured with different power ratings ranging from 30 to 300 kVA. The power converter and digital control circuits are devised to provide rated voltage and frequency with a fairly low output impedance, so as to keep the voltage total harmonic distortion (THD) small even in the presence of highly distorting loads. Simulation results for the rated converter and experimental results from a scaled (5 kVA) prototype are given, which illustrate the expected converter performance.

2025, Astroparticle, Particle, Space Physics, Radiation Interaction, Detectors and Medical Physics Applications

DELMONTE (3,10) , A. LANZA (3) , M. BERNARDONI (10) , R. MENOZZI (10) , A. COSTABEBER (2,9) , A. PACCAGNELLA (2,9) , F. SICHIROLLO (2,9) , G. SPIAZZI (2,9) , M. STELLINI (2,9) , P. TENTI (2,9) , S. BACCARO (4,5) , F. IANNUZZO (4,7) , A.

2025, Journal of Instrumentation

The paper describes power switching converters suitable for possible power supply distribution networks for the upgraded detectors at the High Luminosity LHC collider. The proposed topologies have been selected by considering their tolerance to the highly hostile environment where the converters will operate as well as their limited electromagnetic noise emission. The analysis focuses on the description of the power supplies for noble liquid calorimeters, such as the Atlas LAr calorimeters, though several outcomes of this research can be applied to other detectors of the future LHC experiments. Experimental results carried on demonstrators are provided.

2025, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93

A general-purpose sliding-mode controller is described, which can be applied to most dc/dc converter topologies. It has same circuit complexity as standard current-mode controllers, but provides extreme robustness and speed of response against supply, load and parameter variations. Moreover, contrary to other sliding-mode techniques, the proposed solution features constant switching frequency in the steady-state, synchronization to external triggers, and absence of steady-state errors in the output voltage.

2025, IEEE Transactions on Power Electronics

2025, IEEE Transactions on Industry Applications

2025, IEEE Journal of Selected Topics in Quantum Electronics

This paper presents a CMOS power supply unit for electrically isolated microscale applications, where the provision of electrical power is not appropriate through wiring. A miniature fiberoptic platform consisting of an inclined silicon mirror fabricated using bulk micromachining is coupled to the monolithically integrated photodiode/dc-dc converter system, to yield a standalone optical power supply. In this approach, the dc/dc converter steps up the voltage of a single CMOS-integrated photodiode to a higher level. A test chip is fabricated using UMC 0.18-μm triplewell CMOS technology to demonstrate the power supply unit. Two different types of photodiodes, namely, a triple-well photodiode and an n-well photodiode are compared. It is found that on-chip triplewell photodiode results in a projected responsivity of 26 mA/W. The dc/dc converter had a maximum efficiency of 56% and is able to boost an input voltage level of 0.5-to-1.2 V. Silicon mirrors coated with 25-nm-thick aluminum are measured to have a reflectivity of 80% for a laser beam at a wavelength of 650 nm. Capability of the overall packaged optoelectronic system, consisting of the optical fiber, silicon mirror, CMOS photodiode, and the dc/dc converter, is demonstrated by generation of an electrical power of 60 μW.