A5039581296- Advanced DC-DC Converters
- Advanced Battery Technologies Research
- Multilevel Inverters and Converters
- Induction Heating and Inverter Technology
- Silicon Carbide Semiconductor Technologies
- Spacecraft Design and Technology
- Electromagnetic Compatibility and Noise Suppression
- Microgrid Control and Optimization
- Radiation Effects in Electronics
- Wireless Power Transfer Systems
- Photovoltaic System Optimization Techniques
- Silicon and Solar Cell Technologies
- Gyrotron and Vacuum Electronics Research
- Spacecraft and Cryogenic Technologies
- Analog and Mixed-Signal Circuit Design
- Advanced Thermodynamic Systems and Engines
- Hybrid Renewable Energy Systems
- Particle accelerators and beam dynamics
- Solar and Space Plasma Dynamics
- Semiconductor materials and interfaces
- Energy Harvesting in Wireless Networks
- Radio Frequency Integrated Circuit Design
- Superconducting Materials and Applications
- solar cell performance optimization
- Innovative Energy Harvesting Technologies
Universitat de València
2013-2025
This paper analyzes a high-power (50 kW) high-frequency (150 kHz) voltage-fed inverter with series-resonant load circuit for industrial induction heating applications, which is characterized by full bridge made of insulated-gate bipolar transistor and power control based on pulse density modulation (PDM). strategy allows the to work close resonance frequency all output-power levels. In this situation, zero-voltage switching zero-current conditions are performed, losses minimized. An...
This paper presents a comparison of the behavior intrinsic diode silicon (Si) and carbide (SiC) MOSFETs. The study was done for 1200 V Si SiC data sheet from manufacturers shows characteristics MOSFET' when gate source voltage (V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">GS</sub> ) is 0 V. There are applications where used while different than One these induction heating, depending on load regulation system, can conduct significant part...
This paper analyzes a high-power (100-kW) high-frequency (50-kHz) voltage-fed inverter with series resonant load circuit for industrial induction heating applications which is characterized by full-bridge composed of isolated-gate bipolar transistors and new power control based on phase-shift (PS) control. incorporates load-adaptive variable-frequency controller automated blanking time management in order to allow the work zero-voltage switching all output levels conditions. An important...
This paper presents a 100-kW 100-kHz insulated-gate bipolar transistor (IGBT) series resonant inverter for induction heating applications that uses an improved power control scheme based on the standard pulse density modulation (PDM). is good solution design of high-frequency inverters because output factor near to unity in wide range power, resulting great reduction switching losses and electromagnetic noise. However, current can be discontinuous mode, particularly loads low quality or...
The induction surface hardening of parts with nonuniform cylindrical shape requires a multifrequency process in order to obtain uniform hardened depth. This paper presents an heating high power supply composed by single inverter circuit and specially designed output resonant circuit. whole supplies simultaneously both medium- high-frequency signals the inductor. An initial study is made select most appropriated topology for this application. analyzed, design procedure presented. selected...
The European Power Standard, used when designing and implementing spacecraft power buses, imposes stringent impedance requirements for high reliability robustness, unlike other standards such as those from the American Institute Aeronautics Astronautics, SAE International, or International Deep Space Interoperability Standard. These strict requirements, however, may limit innovations leveraging new technologies resulting recent component advancements. This work examines implications of...
In July 2024, Sunrise completed its third successful science flight. The III observatory had been upgraded significantly after the two previous flights in 2009 and 2013. Three completely new instruments focus on small-scale physical processes their complex interaction from deepest observable layers photosphere up to chromospheric heights. Previously poorly explored spectral regions lines are exploited paint a three-dimensional picture of solar atmosphere with unprecedented completeness level...
The design and results of a high-efficiency high-power (5 kW) nonisolated bidirectional dc-dc converter is presented. High stability due to minimum phase behavior an additional benefit the topology. new boost with output filter where input inductors are coupled. This useful any system that needs charge discharge backup batteries can be applied in space, automotive, telecom power systems.
This paper presents the results of a project that looked after high efficiency bidirectional converter which could be used as battery discharge/charge regulator when bus voltage is above voltage. High efficiency, stability and simplicity are main goals, no galvanic isolation required. Taking into account all these parameters, our proposed solution has been new topology based on boost with coupled inductors. The use reduces mass overall charge/discharge subsystem lowers cost component count....
This paper reports on the life tests of silicon carbide Schottky diodes with high-temperature operation capability (up to 270degC). These 300-V-3-A have been designed meet BepiColombo requirements, a European Space Agency mission Mercury. The test consisted in dc current stress 5 A applied these at 270degC for 600 h or more. Different diode technologies tested and compared. On typical Ti Ni thick aluminum metal layer, reliability revealed degradation both interface top surface due diffusion....
This paper presents a new solution for battery discharge regulator high-power space applications (power-per-module ≥ 5 kW) using high-efficiency step-up converter. Basic requirements are efficiency that is higher than 97%, mass lower 2.5 kg, no galvanic isolation necessary, and high mean time between failures. By taking into account all these parameters, the selected topology has been two interleaved boost converters with passive soft switching. Small-signal analysis of also presented.
This paper presents a post-regulator based on the use of controlled transformer, which adds or subtracts an additional voltage to output filter converter in order regulate its voltage. So, their actuation is complementary that more known post-regulators, such as magnetic amplifier (magamp) and synchronous switch (SSPR), because regulation achieved by controlling across inductor instead charge time. Besides, processes power parallel one flowing from input only handles percentage it. The...
To be competitive on the telecommunication commercial satellites market, electrical power subsystems have to more easily adaptable output level and payloads specifications. A trend in recent years has been a steady increase of payload spacecraft. The communication next generation will their capacity thus able still lodge platform. powers that reached are above 25 kW. This manifold implications. Among them we emphasized it is not possible use used constituent modules at present time whose 1...
In the following years power levels of 20 kW to 50 will be demanded by telecommunication satellites. It is not possible keep 0.5 modules with up 100 in parallel and, therefore, higher must used. A bus voltage seems also necessary and any below 150 V above could meet needs. addition, new optimized topologies that process only a part total delivery can employed improve efficiency. this article, design guidelines experimental results high efficiency battery discharge regulator (BDR) module...
The short-circuit capability of power switching devices plays an important role in fault detection and the protection circuits. In this work, experimental study on (SC) commercial 600 V Gallium Nitride enhancement-mode high-electron-mobility transistors (E-HEMT) is presented. A different failure mechanism has been identified for p-doped GaN gate (p-GaN) HEMT metal-insulator-semiconductor (MIS) HEMT. addition to well known thermal breakdown, a premature breakdown shown both HEMTs, triggered...
This article presents a generalized analysis to explain current ripple of an m windings coupled inductor with given coupling factor k <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ij</sub> for each pair and then studies more in detail its use the continuous conduction mode pulsewidth modulated signals. To determine ripple, expression equivalent inductance winding is calculated, including influence voltage unbalance. In ideal case, shows that...
In this paper, the main steady-state frequency properties of LLC circuit are described. The advantage its use on induction heating applications is proved, in contrast with SRI (series resonant inverter). This analysis will allow future design a control strategy for inverter. Finally, simple algorithm proposed, which satisfies power specifications and limits stress current switches.
Next generation of communication satellites increase their power capacity up to 25kW. Therefore new high modules have be designed. To utilize more efficiently the solar arrays and batteries, higher bus voltage has been introduced. In this paper we present an overall design experimental results a high-efficiency non-isolated 5kW Weinberg converter with conductance control working as battery discharge regulator module. reliability active switches, one loss-less passive turn-off snubber tested
Techniques based in parallel post-regulation eliminate cross-regulation between the different outputs of multi-output converters and achieve good efficiency by handling only a percentage power delivered to output. This work describes simple implementation such regulation mechanism two output forward converter. Moreover, development complete steady state low signal model ensures proper design implementation. The shows inherent simplicity procedure, similar that classical PWM regulators.
The present paper shows the preliminary results of a project that looks for high power, efficiency bidirectional step-up converter which could be used as battery discharge/charge regulator. High and low mass are main goals, no galvanic isolation is required MTBF should large possible. Taking into account all these parameters our proposed solution has been new topology based on boost with output filter couples input inductor. use reduces overall charge/discharge subsystem lowers cost...
In this paper a solution for the power conditioning and distribution unit (PCDU) of solar electric propulsion module (SEPM) is proposed. The electronic system made out ion thrusters which need very steady supply voltage therefore care has to be taken during switch off (beam-out) avoid transient overvoltages (they must less than 2%). new conception sequential switching shunt maximum regulator (S3MPR) consisting in (S3R), keep SA at its point (MPP) followed by boost produce constant 100 V...
A novel DC-DC power converter has been developed to fulfill the requirements of a solar electrical propulsion module. The maximum point tracker array regulator is divided into two series converters; direct-energy transfer (DET) and secondary step-up converter. DET creates an unregulated bus regulates 100-V bus. purpose this paper describe solution with specific design experimental results.
Coupling output inductors is a very popular solution when designing multiple-output DC/DC system. Space-borne circuits are one of the areas where custom converter design with coupled could be preferred to have detailed all variables. Output voltage regulation can improved using on converter, and, as demonstrated in this paper, it provides an enhanced stability. This paper presents small signal analysis push-pull seven outputs having its together and compares theoretically uncoupled version...
In this paper the main advantages of L-LC resonant inverter for induction heating over conventional voltage-fed SRI are presented: its lower transformer current levels and short-circuit capability. The design algorithm is presented, transformation equations which allow conversion into equivalent deduced, guaranteeing same working frequency power dissipation with inverter, coil piece. Experimental results also showing continuous reliable behavior during short-circuit.