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Dynamic voltage scaling (DVS) is a useful technique to optimize performance and efficiency of CMOS digital processors using dc–dc converters that require to meet extremely fast slew rate demand. However, there exist conflicting design criteria in existing DVS power supply architectures. This paper proposes a single-inductor multioutput-level buck converter for low power DVS-enabled systems. Under...
In this paper, a switched Z-source dc-dc converter (SZSC) is proposed for the conversion from a low voltage to a higher one in renewable energy systems. The voltage gain is increased by adding another one switch and diode to the output terminal of the traditional Z-source dc-dc converter. Not only does the output capacitor function as the filter capacitor; it is also connected in series into the inductors'...
New members of XY converter family topologies are proposed in this treatise for a high-voltage/low-current renewable application. Based on the X Converter, the whole existing X-Y Converter family is categorized into four categories; L-Y, 2L-Y, 2LC-Y and 2LCm-Y converter. Four new 2LC-Y topologies (2LC-LVD, 2LC-2LVD, 2LC-2LCVD and 2LC-2LCmVD) converters are presented in this treatise which offer an...
A novel isolated high step-up gain DC-DC conversion system for HVDC grid-connected PV power generation applications is proposed in this paper. The proposed system has a distributed MPPT and centralized step-up DC-DC configuration. By employing distributed MPPT converter, high power losses caused by partial shading of the PV arrays can be reduced significantly. Modular scheme is adopted for the centralized...
The photovoltaic (PV) grid-connected power system in the residential applications is becoming a fast growing segment due to the shortage of the fossil fuel energy and the great environmental pollution. A new research trend in the residential generation system is to employ the PV parallel connected configuration rather than the series-connected configuration to satisfy the safety requirements and to...
This paper analyzes the performance of three different topologies namely parallel, serial and variable-structure circuit of switched-diode-capacitor voltage accumulator (SDCVA). The converters are modelled in MATLAB/Simulink environment. Simulation is carried out to investigate the performance of the converters and the results are discussed. The optimum topology is identified based on the voltage...
This work presents a six phase Switched Capacitor (SC) DC — DC converter for photovoltaic Energy Harvesting designed in a 130 nm CMOS process for commercial motes application and Internet of Things (IoT). It tracks the Maximum Power Point (MPP) of a commercial 3 cm × 3 cm 60 mW poly-crystalline photoelectric panel through switching frequency modulation aiming battery recharge. Open-circuit voltage...
Capacitor natural voltage balancing in multilevel converters is a potentially attractive feature because it does not require capacitor voltage measurement and balancing control effort. The paper addresses DC-DC step-down Flying Capacitor Converter average balanced capacitor voltages for inductance dominated LR-loads (or resistive LC-filtered ones). Capacitor voltage unbalances, or offsets compared...
DC power conditioning and processing is an essential challenge now a days. Rectifiers having bridge structures are considered to be nonlinear as they draw non sinusoidal current from line. This distorted current causes several problems related to power quality. In this paper, a new configuration of single phase single switch controlled rectifier using SEPIC topology is proposed. The input current...
Applications of the multi-input converters are becoming popular due to their conformity to renewable energy systems. This paper proposes a new topology of double-input boost converters with continuous input current, which is intended to be used for renewable power sources. The topology is derived from two dc-dc converter configurations: boost dc-dc converter and Y-source dc-dc converter. In the proposed...
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...
In this work, several dc-dc converter topologies are examined for GaN-based, single-input, multi-output, large step-down applications; namely 200V∼400V dc distribution systems in modern defense, aeronautical, and datacenter industries. Many critical loads in these larger systems are supplied by 48V, 24V, 12V, or lower voltage sources, requiring a significant step-down of the main dc bus voltage. Due...
There is a growing interest in bidirectional dc-dc converters for interface battery with energy source and load. This paper provides a comprehensive review of non-isolated bidirectional dc-dc converter topologies. The classification and description of each type presented is based on the features and applications. This review paper is intended as a convenient reference to future non-isolated converter...
To improve the efficiency of electric vehicle technology, hybrid energy sources are being incorporated. Another strategy for improvement is to facilitate energy recovery in regeneration mode. So the solution to this to use a bidirectional DC-DC converter in electric vehicles. The improvement of efficiency can be further increased by using a non-isolated bidirectional DC-DC converter. In this paper,...
In this paper a new single-switch non-isolated, DC-DC converter, with high voltage transfer gain and reduced semiconductor voltage stress is proposed. The high gain converter is designed by integrating a boost with quadratic boost converters. The high voltage gain capability at moderate duty-cycle and low switch voltage stress enable the use of a lower voltage and RDS-ON MOSFET switch to reduce cost,...
This paper presents an analytical investigation of the three-phase single active bridge DC-DC converter. First, multiple operation modes have been identified, that can be distinguished by the shape of the phase currents. For every single operating mode, analytical equations have been derived in order to describe the currents of both input and output bridge. In this paper, two operating modes are selected...
A new galvanically isolated DC-DC converter has been presented in this paper. The proposed topology is based on the quasi-switched-boost impedance network. It not only includes all positive characteristics of previous converters including continuous input current, high boost ability and high efficiency, but also has the prominent features of less passive elements utilization, small size and light...
A multilevel soft-switching DC-DC converter with only one resonant cell for medium voltage conversion is proposed in this paper. Two control strategies for the converter are analyzed and compared. For the proposed converter, all dc capacitors can achieve voltage self-balanced under open loop control. All switches and diodes operate in soft-switching condition without sacrificing reliability. Finally,...
Multi-input converters (MIC) are gaining more popularity due to its capability for integrating multiple sources. A MIC diversifies the energy from multiple sources of different I–V characteristics in a single stage. Energy diversification from integrated sources in regulated manner is very challenging and being researched in recent years. In this paper a power management and control scheme for multi-input...
Power electronic converters play an important role in integrating renewable energy sources in to the electrical grid. A power conditioning unit (PCU) which comprises of different power electronic converters is essential to process the power of renewable energy sources and make it useable for stand-alone or grid-tied application. DC-DC converters are used in the primary stage of PCU to step up the...
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