The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A bidirectional flyback boost/buck integrated converter with high conversion ratio is designed and implemented in this paper. When batteries release energy to DC bus, this converter functions like flyback and boost integrated converter, with outputs of flyback and boost converter cascoded to obtain high voltage gain. Energy in leakage inductor is recycled through boost converter, neglecting the need...
Traction converters in automotive applications benefit from various emerging technologies like semiconductor-materials such as SiC or converter topologies like multilevel converters. As especially novel topologies often lack an analytic way to determine their power losses or efficiency, comparability is often hard to achieve until each converter is built up and measured. With the proposed procedure...
In many practical applications of wireless power transfer (WPT) system, high power transmission efficiency is required and has been widely studied as an important issue. This paper presents and analyzes a Series-Parallel compensated WPT system with a Z-source inverter network inserted. To obtain higher efficiency, asymmetrical voltage-cancellation (AVC) control is applied and the ZVS operation is...
Multilevel inverter has numerous features for high and medium voltage applications. The size and complexity of multilevel inverter topologies limits its applications. In this paper performance comparison of seven and five levels inverter is presented. For both inverters cascaded H-bridge and reduced switched topologies are used. Performance of the inverters is compared topological and by reduction...
This paper presents a Multiple-Input Single-Output Full Bridge DC-DC converter. This converter will be used to combine energy from multiple renewable energy sources to a single common output for a DC electrical system. System level approach to the design of the converter allows simple and functional solution to the requirement. Theoretical calculations, simulations, layout, and thermal analysis are...
This paper investigates a novel half-bridge cycloconverter configuration on load side with devices operating at line frequency, thus providing direct high-frequency ac to line frequency ac conversion with transformer isolation. This paper also presents a detailed comparative study and evaluation of double-ended converters, viz., full-bridge, half-bridge, and push–pull-based microinverter topologies...
In this paper, a high frequency linked cascaded multilevel inverter (CMLI) is presented, which brings simplicity for CMLI to connect in renewable systems and electronic vehicular applications. The requirement of multiple isolated dc-supplies and their balancing is a critical drawback in CMLI and for this reason; it is very difficult to connect a CMLI directly with any system. The utilization of multi-winding...
Multilevel inverters (MLIs) consist of increased number of power semiconductor devices for the generation of desired output voltage. As the number of components increases, the probability of fault due to power semiconductors increases drastically. Although the MLI topologies are in a matured state, the research in fault detection and diagnosis (FDD) in MLIs is still in a developing stage. This paper...
The multilevel inverter technology has gained a tremendous significance in the research area. This paper proposed a new controller for generating the switching sequence of power devices used in multilevel inverter to produce the desired output. An embedded code has been developed to control the switching states of different IGBT switches. To validate the effectiveness of the proposed technique to...
This paper aimed at a power factor correction (PFC) based novel speed control for standalone generator fed PMBLDC drives. The scheme is highly suitable for obtaining unity power factor operation in standalone generator fed PMBLDC drive, since the reference current signal in this control scheme is estimated using a frequency adaptive unit template block. The system frequency in any standalone generating...
This paper proposes a new methodology of firing to increase the number of levels in the output voltage of a conventional seven-level inverter. In a conventional 7-level cascaded H bridge (CHB), by employing a new firing scheme with unequal DC sources, an output waveform of 21-levels has been generated. Thus near sinusoidal waveform has been achieved with the same number of switches. The simulation...
Electric Vehicle (EV) has come into attention within automotive industry over the years. The feature of EV that uses electric as primary source provides benefits to customers. As electrical system is the major appeal of an EV, the present study focuses on the charging system where it involves DC-DC converter for high voltage charger. The phase-shifted-full bridge and LLC are used in high power application...
The conventional one cycle control cannot realize the function of eliminating harmonic component in the output voltage waveform of a cascaded multilevel inverter. To overcome these problems, this paper proposes a modified one cycle control(OCC) scheme based on a sample time staggered technique. Through the stagger of the sample time in the control system of cascaded units, the output voltage waveform...
According to the principle of DC injection, the topology of a 12-pulse current source converter based on autotransformer is proposed. The Main bridge topology is a autotransformer, and each injection branch consists of a double winding reactor and a IGBT and a diode in series. DC injection could make the main bridge realize zero current switching and operate in four quadrants. The system control method...
This paper investigates a three-level three-phase Dual Active Bridge (DAB) dc-dc converter with a star-delta connected transformer. The soft-switching region is analyzed for two and three-level operation, using symmetrical voltage waveforms, showing an increased ZVS range for three-level operation. A large number of switching modes are identified and are modeled with piecewise-linear equations. To...
An input-parallel output-series full-bridge DC/AC converter for on-board Electric Vehicle (EV) charger is proposed in this paper with the merits that low input current ripple and output voltage ripple. It can also decrease the current stress on the primary side devices and voltage stress on secondary side devices. This proposed DC/AC converter interleaves two isolated full-bridge converters with parallel...
In recent years, power electronics has evolved dramatically due to their importance in power extracted management from renewable sources. In this paper an overview of grid interconnection systems with galvanic isolation is presented. The most common used topologies from AC/AC, AC/DC, DC/AC and AC/AC conversion are analyzed y summarized in order to provide a good understanding of the existing technologies.
In this paper, a hybrid power electronic topology is presented for grid-connected PV panels. The proposed structure comprises of a dual active bridge (DAB) converter along with a multilevel converter which is based on diode-clamped structure. The DAB converter is connected to the proposed multilevel converter using a DC-link capacitor. The proposed hybrid converter can increase the produced voltage...
The widely used Line Commutated Converter (LCC) suffers from commutation failure which might cause severe economic and secure consequence. The recently proposed Modular Multilevel Converter (MMC) HVDC is expected to be an alternative solution. However, the half bridge MMC (HBMMC) cannot interrupt the short current caused by DC transmission line fault, which have stunted the engineering practice of...
This paper presents a novel hybrid modular multilevel voltage source converter suitable for HVDC applications. It has the advantages of other modular multilevel topologies and can be made more compact making it attractive for offshore stations and city infeed applications. The Operating principle of the converter and internal energy management are discussed with simulation results from a scaled medium...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.