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Integrated charger topologies that have been researched so far are with the dc-dc converters and the charging functionality usually have no isolation in the system. Isolation is an important feature that is required for user interface systems that have grid connections and therefore is a major limitation that needs to be addressed along with the integrated functionality. This study features a unique...
This paper proposes a new 48 V DC-fed dimmable LED driver based on a Resonant Switched-Capacitor Topology (RSCT) where the analog-based dimming feature is accomplished by means of a variable inductor (VI). The proposed topology is based on the classic RSCT step-up double mode converter and it provides a simple and cost-effective solution while guaranteeing a wide dimming range. In order to implement...
Energy efficiency requirements of PV-inverter and UPS can be reached through multi-level IGBT topologies. A 3-level T-type topology utilizing dedicated 650V and 1200V IGBT and free-wheeling Diode chips (FwDi) and low inductance module construction are essential to create a performing IGBT module for these applications.
Power electronic grid-connected converter topologies are widely used as grid interface to interconnect several renewable energy sources under the concept of distributed generation systems. These converters must ensure an active and reactive flux control, minimize the current and voltage harmonic distortions and perform a proper synchronization with the electrical grid. This paper presents an analysis...
High efficiency and minimum components of the interleaved micro-inverter make them popular in industry. In this paper, a micro-inverter is designed for a 240 W panel in which a high speed MPPT algorithm is implemented in order to keep the reliability of the control system. Moreover, the associated control system is completely described. An optimizing method is applied to the interleaved micro-inverter,...
A new topology is proposed as battery charging system. The topology has three parts. The first part uses the one-cycle control method, it has a function of power factor control, it also can improve the power factor of the system. The second part use the LLC resonance technology, it can make the switch ZVS and the rectifier diode ZCS in the secondary side. The switching loss is reduced and the efficiency...
Electromagnetic Compatibility (EMC) testing often requires that a damped sinewave voltage or current be applied to a system. These damped sinewaves may have many different requirements, such as the fundamental frequency, peak amplitude, quality factor or ‘Q’, along with timing requirements. This paper helps develop an understanding of the waveform requirements and then explores design techniques that...
The paper deals with the dynamic charging of the electric vehicles by an inductive power transfer (IPT) system with a segmented track. The reflexive properties of the IPT system is studied by evaluating the reactance of a transmitting coil when coupled with a pick-up with respect to uncoupled conditions. Different topologies for the pick-up circuit are evaluated, some of them introduced in this paper,...
In this paper, a simple voltage balance method for a SST using cascaded H-bridge converters is proposed to reduce the voltage difference of H-bridge converters. The tolerance of DAB converter's passive components in each secondary stage causes the unbalance problem of output voltage in primary side H-bridge converter. In order to reduce the voltage difference of H-bridge converters, the additional...
The rapid progress of large-scale clean energy accessing to the grid promotes the development of DC grid technologies. HVDC (high voltage direct current) circuit breaker as one of the key equipment of the DC grid has gradually attracted more and more attentions. Direct current is more difficult to be interrupted comparing to alternative current because of without natural zero-crossing, especially...
A novel hybrid on-board charger consisting of a phase shift full bridge (PSFB) and a half bridge LLC resonant converter with shared lagging-leg switches is proposed. The proposed topology adopts an additional switch and a diode in the secondary side of the PSFB converter to guarantee the wide ZVS range of the lagging-leg switches and to eliminate the circulating current. The outputs of the two converters...
The drivetrain components of an electric vehicle can be utilized to obtain an on-board battery charger (OBC) to save cost, volume and weight. Many integrated OBC topologies have been proposed in the past years, which involve a wide range of machine types, inverter topologies, and power levels. None of these ideas provide a universally acceptable alternative due to the disadvantages they inherit. Therefore,...
Line connected electronic devices have to meet ever stringent limitations regarding EMC. One of those standards, the IEC 61000-3-2, limits the line current's low frequency harmonic spectrum. In case of switch-mode power supplies, meeting the IEC 61000-3-2 typically increases circuit complexity and with it costs. Thus, there is a strong wish to realize the required input current shaping with the lowest...
The best way to avoid MPPT drawbacks due to mismatching phenomena is to use a dedicated DC/DC converter, in charge of MPPT, for each PV panel instead of a big central converter for the whole PV array. Dedicated DC/DC converters can be boost-like converters; they must be serially connected each other to obtain an higher voltage as required by the grid inverter. However, when the number of PV panels...
This paper presents a novel “Modular Multilevel Converter” (MMC) topology. The topology takes advantage of the MMC characteristics by offering multilevel output voltage with low Total Harmonic Distortion (THD), increased reliability, and design flexibility due to the modular nature of the converter [1] and [2]. This topology is composed of a “full-bridge converter” (FBC) connected to multiple “High...
This paper proposes the use of voltage-doubling diode rectifier in the output stage of the zero-voltage-switching active-clamping current-fed half-bridge isolated DC-DC converter and presents a comparison with the classic diode full-bridge rectifier. The design methodology was revised to include the voltage-doubling rectifier and lower side clamp capacitor connection. Two converters (diode bridge...
Normally, a two stage power conversion system is used to convert a low dc voltage to high amplitude ac voltage. These two stage power conversion systems are very bulky, more complex in control and less efficient, etc when they are used, especially for low input dc voltages. In this paper a high gain dc-ac inverter topology is presented, which can produce an instantaneous output voltage higher or lower...
The proposed Second Target Station (STS) increases the beam energy at the SNS to 1.3 GeV by adding 7 additional cryomodules (28 cavities) to the end of the existing linear accelerator. To achieve the required gradients, these cavities will be powered with up to 700 kW peak power utilizing upgraded 550 kW klystrons. To meet the additional peak power needs, an enhancement to the present High Voltage...
Soft magnetic composite (SMC) material is a relative new soft magnetic material which has undergone the substantial development during last decades. Especially with the low-pressure pressing on the mold, the magnetic core with SMC of the machine can be fabricated easily and the manufacture cost can be reduced greatly. By using this technology, a claw pole machine (CPM) with SMC core was designed and...
The effects of inductive coupling among TSVs within large TSV arrays are investigated in this paper. A comparison of the equivalent inductance of a paired TSV model and arrayed TSV macromodel is presented for three TSV distribution topologies, grouped, lined, and uniform, within the power network. Modified closed-form expressions are proposed to determine the equivalent inductance of a TSV in these...
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