The main challenge of medium-frequency transformers is the number design parameters, constraints and objectives, difficulty handling them on a particular design. This paper presents novel computer-aided optimal for MF using multiobjective genetic algorithm, in nondominated sorting algorithm II. proposed methodology has aim reaching best transformer given power converter topology, by optimizing efficiency, weight, also, leakage magnetizing inductances at same time. solutions are validated...

In this article, a revolutionary and novel single-stage, multiport power conversion block is proposed. The concept based on bidirectional flyback converter with four-quadrant switches that permit us to seamlessly control the direction of energy flow select which ports are active. This approach, denominated as multicell (M2BF), can be used modular multifunction building interfacing ac dc sources loads in complex systems like one we encounter electric vehicle (EV) applications. property...

The introduction in the semiconductor market of SiC technology enables power designers development converters with higher density (W/m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> ) comparison traditional based on Si semiconductors. This work presents redesign a DC-DC converter, used railway traction applications full-SiC modules. low current rating actual modules makes necessary use several to substitute "traditional" ones. is...

This paper presents new analytical equations, parametrized with respect to the number of converter phases, for multiphase isolated dc-dc topologies. describes five models, as well their level accuracy. Based on these parametric a thorough comparative among various common high-power topologies is carried out, highlighting best topology regarding efficiency, cost, and power density. The results are firstly compared verified using PLECS simulation software, validated finally by experimental...

In this article, two power factor corrector (PFC) control strategies for a bidirectional inductive transfer (IPT) system are proposed. These presented novel circuit without input and output interfaces wireless electric vehicle battery charger application. This compact topology comprises: unfolding rectifier, primary resonant bridge, secondary-side active rectification. Two PFC controls described in detail: primary-side control, performed the bridge; implemented rectification stage. Both...

This paper presents the design and development process of a supercapacitor storage based elevator. The main aspects system are described: rating DC/DC converter design. Based on this procedure, Energy Storage System has been developed multichannel buck-boost converter. Comparing with conventional elevation system, designed device is able to achieve an improved efficiency, reducing grid-absorbed power guaranteeing automatic rescue. A 5 kW prototype tested first in simulation then...

This study is focused on modulation strategies and soft-switching techniques of the isolated dual-active-bridge (DAB) converter for power-electronics applications, where wide input/output voltage power ranges are required. The aim this work to different operation modes propose a schema combining five modes. objective proposed control strategy reduce switching losses semiconductors improve overall efficiency. Thanks use single-active-bridge modulation, zero-voltage-switching (ZVS) region DAB...

In Medium Voltage grid-connected high power converters, due to switching frequency limitations, bulky and expensive passive filters are needed in order limit the harmonic content point of common coupling (PCC). this paper, a design procedure that optimizes cost volume LCL filter is proposed experimentally validated, taking into account effect current voltage harmonics fulfilling stringent grid codes limits. The methodology based on an optimization function finds optimal element values...

This article presents the utilization of DPWM for online condition monitoring SiC power MOSFET switching at high frequencies in a three-phase inverter prototype. Due to settling time imposed by system, accurate measurements require low frequency and modulation indexes when monitoring. To overcome these limitations, strategy is proposed. way, monitored device does not switch during certain time, hence, accuracy compromised. The effect alteration analyzed terms losses current ripple, comparing...

Lithium-ion (Li-ion) batteries are still the best technology to power Electric Vehicle (EV), due their high and energy density. However, use of these can be limited in cars with a demand for peak very One way improve performance Li-ion battery reduce its weight is associate this another higher specific as second source, e.g. Lithium-sulfur (Li-S). The development Hybrid Energy Storage Systems (HESSs) promising solution optimizing management EVs. In paper, we present experimental results...

Wireless charging is gaining interest worldwide, mostly driven by electric vehicles (EVs) and consumer electronics. This paper presents the design implementation of a contactless battery charger for vehicles. The power converter based on SiC MOSFET devices efficient topologies, enabling to increase operating frequency with aim minimizing system volume weight. 3.2kW-100kHz inductive transfer system, designed domestic application.

This article analyzes a stochastic supercapacitor model and uses the to estimate losses for different balancing methods. In addition, it proposes guidelines designing bank that includes networks. Supercapacitors (SCs) can be used as main part of an energy storage system (ESS) transfers high power DC or AC grid. is needed in grids with penetration renewable energies order balance generation consumption. The design method based on which variables: capacitance, series resistance self-discharge...

Inductive power transfer (IPT) is widely discussed as an alternative to contact charger for plug-in hybrid and electric vehicles. This paper analyzes a contactless battery back-end factor correction (PFC) concept, reducing the primary-side circuit complexity physical size. For that purpose, main volume loss factors of are identified, discussing partitioning tasks perform unity operation. An analysis most commonly used front-end PFC proposed configuration performed, with aim highlighting...

This paper presents the design and development of a 100kW Silicon Carbide battery charger operating at switching frequency 60kHz. The main aspects converter such as topology, gate driver electromechanical are described in paper. has been developed experimentally validated full rate.

This paper presents an evaluation of the performance improvements using hybrid IGBT modules; Silicon (Si) and Carbide (SiC) Diode, in 225kW dc-dc converter for electrical storage based light rail vehicle (tramway). First experimental characterization conventional modules is carried out. Second, this characterization, power loss reduction that provides semiconductor calculated, as well achievable switching frequency increase maintaining original thermal design a Si module. Finally, obtained...

The influence of the silicon carbide (SiC) technology in terms volume, weight, efficiency, and cost a 225 kW DC-DC railway converter is detailed this study. Three different power modules technologies have been used: `traditional' silicon-based modules, SiC-hybrid newest full-SiC available market. An experimental comparison presented, showing their switching waveforms compared with those original Si modules. highest speeds obtained by SiC make use traditional module packages impossible...

The use of Silicon carbide (SiC) devices represents an improvement in terms size, weight and efficiency power converters. However, SiC-based solutions present high dv/dt di/dt on the switching events, increasing common-mode noise injected into grid. To reduce noise, three-phase inverters with a DC-link referenced output filter are widely considered photovoltaic (PV) connected to if is inductor ripple larger, this must be for AC design. This work shows, PV inverter, impact that current...

In this paper, a novel active power decoupling topology called Floating Capacitor Integrated Dual Active Bridge (FCI-DAB) for single-phase, single-stage AC-DC solutions is introduced. The main point of the circuit an energy buffer that compensates fluctuation at double grid frequency. filter composed by floating capacitor and full-bridge; connected to high-frequency link resonant DAB <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...

The goal of this paper is to show the improvements in terms size, weight and efficiency a real railway inverter based on SiC-hydrid Hitachi MBM450FS33F-C module, with new 100×140mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> package. developed compared original Si-based 140×190mm modules. Laboratory field tests traction unit are also presented.

Applications such as Hybrid Electric Vehicles (HEV), vertical transportation and railway traction require very high power converters with the volume limitations intrinsic to onboard applications. High density can be achieved by using higher switching frequencies, Silicon Carbide (SiC) switches coupled inductors topologies. In this paper, close-coupled topologies are modeled, simulated designed for a 2.5kW interleaved PFC boost all-SiC converter. Design simulation results validated through...

The use of Gallium Nitride (GaN) devices allows breaking the performance barriers conventional silicon-based (Si) low power converters by increasing operating frequency while reducing system losses. This paper evaluates influence current ripple, switching and number GaN on a bi-directional buck converter. Furthermore, hard-switching soft-switching operation modes are evaluated, identifying optimal conditions for GaN-based converters. Analytical simulation models employed obtained results...

This paper presents a new parametric model of single-active-bridge (SAB) converter with variable number phases. The soft-switching behavior and the design snubbers are also analyzed. analytical study is validated using PLECS simulation software configurable 10kW / 20 kHz/500 V experimental prototype.

Silicon Carbide (SiC) MOSFETs enable enhanced performance of power converters in several applications. Parallel connection SiC become mandatory for medium applications due to the current rate existing modules. A balanced sharing between paralleled is desired maximize capability each device, maximizing whole system. This work studies static unbalance two 1200V-400A MOSFET modules with individual gate driver. Experimental measurements are done focused on parasitic inductance caused by...