Hybrid power systems continuously deliver to the load from several renewable energy sources. For such systems, use of a multiple-input converter (MIC) has advantage simpler circuit structure and lower cost, compared single-input converters. By decomposing converters into basic cells, namely, pulsating source cells output filters, set rules for generating topologies is proposed. Specifically, two families are systematically generated. In first family MICs, all input sources can simultaneously...

Because of higher switching speed silicon carbide MOSFET, the crosstalk in a phase-leg configuration will be more serious, which hinders increase frequency and lowers reliability power electronic equipment. The displacement current gate-drain capacitor voltage drop on common-source inductors can induce crosstalk. In order to suppress crosstalk, this paper proposes novel gate driver, two additional capacitors are added create low turn-off impedance. With proposed parasitic inductor decoupled...

Abstract Self‐powered devices for human motion monitoring and energy harvesting have garnered widespread attention in recent research. In this work, we designed a honeycomb‐structured triboelectric nanogenerator (H‐TENG) using polyester cloth Teflon tape, with aluminum foil as the conductive electrode. This design leverages large surface area flexibility of textiles, resulting significant performance improvements. The H‐TENG achieves an output voltage 350 V, current 42 μA, transfer charge (Q...

For the excellent electrical performance, Gallium Nitride (GaN) new-type semiconductor devices are preferred in high voltage, frequency and power applications. However, GaN have low on-resistance loop layout requires damping loop. These both can lead to voltage current oscillations under even cause uncontrollable oscillations, which limit application of occasions especially bridge circuits. Based on existing literatures, this paper analyzed generation mechanism oscillation proposed two...

A resistive-type dc superconducting fault current limiter (SFCL) is developed for the limiting at Suzhou Nami substation. The rated voltage and are 20 kV 400 A, respectively. prospective peak value of short-circuit about 3.5 kA, could be limited to less than 2.1 kA by SFCL. SFCL uses 1800-m stainless steel reinforced yttrium barium copper oxide (YBCO) conductor. According testing results, has passed withstand test 50 kV/min, full-wave lightning impulse 95 kV, power switching with a 2.26...

A suitable for high frequency applications with gallium nitride high-electron-mobility transistor overcurrent protection (OCP) circuit has been put forward. The proposed depends on the detection of drain-source voltage GaN HEMT to judge fault, then turn off rapidly and send a fault signal microprocessor in switching period which happened within few hundred kilohertz several megahertz. Through analysis experiment, it shown that advantages short-time protection, simple structure strong...

An isolated buck-boost (IBB) converter with a hybrid three-level full-bridge primary-side circuit is proposed to achieve wider voltage range regulation. The composed of leg and two-level leg. output the five level (i.e., ±V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in</sub> , / 2, zero), secondary-side semiactive rectifier two active switches diodes. input three xmlns:xlink="http://www.w3.org/1999/xlink">o</sub> zero). Hence, operation can...

In the renewable power system with two or more sources, application of multiple-input converter (MIC) instead several single-input converters can simplify circuit and reduce cost. A novel full bridge dc/dc is proposed in this paper. Taking inputs as example, operation principles characteristics double-input are presented. By applying double phase-shift control strategy, soft-switching technology accessible. Power management method new also introduced. Finally, a 800W prototype built to...

A simple parameter design method for damping networks of superbuck topology to avoid right-half-plane (RHP) zeros is presented in this paper. It proved that the existence RHP output voltage models individual- or coupled-inductor converter related duty ratio and inductor parameters when there are no circuit. The constraints tough cancellation extremely large. So, with analyzed restrictions can be relaxed by using By assumptions, easy satisfy proper network parameters. Both situations resistor...

Due to the high switching speed of SiC MOSFET, parasitic parameters and low damping in circuit, turn-off overvoltage oscillation freewheeling diode MOSFET are very severe. Based on terminal impedances during transition mechanism analyzed suppressing method is researched this paper. The DC-side snubber, which high-frequency decoupling capacitor parallel with phase-leg configuration, a simple but will lead low-frequency overlaying voltage. In order improve effectiveness snubber suppress...

The conventional hysteresis current control (C-HCC) in VIENNA rectifier is one of the simplest and economic strategies. However, harmonics content switching number are high, coupling among three-phase cannot be eliminated. vector based on SVPWM has a higher accuracy. needs large amount computation, implementation process complicated. Therefore, it significant to research strategy which can combine simplicity rapidity C-HCC good performance control. In this paper, space pattern (SVSP-HC)...

An optimal dual-phase-shift control strategy of an isolated buck-boost converter is proposed in this paper. The theoretical analysis complemented, and the three-dimensional graphs output current versus two variables are given. operating point determined by peak a clamped inductor shown as trajectories graphs. Moreover, with strategy, low value, soft-switching operation, wide input voltage range regulation, whole load high-efficiency performance can be achieved. Furthermore, parameter design...

Silicon carbide (SiC) semiconductor devices have received extensive attention with the better performance of wide band gap material. It is necessary to compare their silicon (Si) counterparts due SiC are new. In this paper, a test platform based on buck converter constructed switching characteristics MOSFET, Si CoolMOS and IGBT, input voltage which 400V, output current 4-10A. Switching waveforms, times, energy losses, dv/dt, di/dt reverse recovery characteristic internal diodes three...

A control strategy with three variables that contain switching frequency and two duty cycle ratios for an isolated buck-boost converter is proposed in this paper. The only operates the discontinuous current mode (DCM) boundary (BCM) whole voltage range load which can achieve excellent softswitching performance, a low energy circulation, high efficiency. On basis of operational principle simplification, optimal operating point has minimum clamped inductor peak value obtained. Under...

Abstract Purpose To simulate exposure (e.g., during interventional procedures) of a worker close to an operating MR scanner by calculating electric fields and current density within anatomically realistic body model due z ‐gradient coil compare results with safety guidelines European Directive 2004/40/EC. Materials Methods Electric field in adult male located at three positions the range 0.19–0.44 m from end generic were calculated using time‐domain finite integration technique (FIT)....

Hybrid power systems derive simultaneously from several renewable energy sources and deliver continuously to the load. For such systems, use of a multiple-input converter (MIC) has advantage simpler circuit design lower cost, compared conventional single-input converters. Taking dual-input Buck as example in this paper, new management strategy is first proposed multiple operation modes system are analyzed. Based on small signal modeling, approach for designing closed-loop can be proposed....

A multiple-input converter (MIC) is devoted to combining on-board energy sources in the electric vehicles (EVs) and hybrid-electronic (HEVs). By analyzing structure of single-input converters, basic cells including pulsating source (PSCs), buffer (BCs) output filter are proposed for deriving various MIC topologies. can be categorized into two lists, without BCs with BCs. According presented combination cascade rules, families MICs systematically generated.

In a hybrid renewable power system, the use of multiple-input dc/dc converter (MIC) leads to simpler circuit and lower cost, compared with conventional several single input converters. This paper focuses on optimizing design dual-input DC /DC converter. Different single-input DC/DC converters, parameters MIC is very complicated. because will operate in multiple operation modes, which sources can deliver load either simultaneously or individually. Considering modes simultaneously, an method...

Sequential switching shunt regulator (S3R) has been widely used in satellites for its simple structure and high reliability. Double section functioning, which two sections operating simultaneously, is the other mode of S3R beside normal mode. It inevitable can lead to larger bus voltage ripple, less controllability higher losses. A detailed analysis based on double functioning process description given boundary load current, main ripple frequency. Considering influence a new method control...

Currently, photovoltaic (PV) grid inverters include two sorts, isolated type and non-isolated type. One of the main problems PV is common mode (CM) noise. This paper introduces a dual Buck inverter for purpose suppression CM current in inverter. Compared with traditional full bridge inverter, this topology has simple structure, high efficiency, reliability low current. analyzes its characteristics under both normal conditions dead band conditions. The simulation experiments are presented to...

In the power system with two or more renewable energy sources, it can simplify circuit configuration and reduce cost by using a multiple-input converter instead of several single-input converters. Taking double-input Buck (DIBC) as example, this paper discusses relationship between inductor current ripple phase difference among drive signals, an interleaved dual-edge modulation (IDEM) is proposed in order to minimize ripple. As result, filter be reduced significantly, leading fast dynamic...

GaN devices are developed rapidly in recent years, which makes it possible to produce power electronic converters with higher efficiency and density. However, the circuit parasitic parameters, large di/dt dv/dt caused by devices' extremely fast switching can easily lead voltage current oscillations. This problem affects stabilities increases difficulty of application devices. In this paper, oscillation problems will be explained oscillator theory an suppression method introduced. All...