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.
This paper presents dc-dc converter based on voltage dividing class E amplifier. Class E2 dc-dc converter, which is one of the converter suitable for high operating frequency is studied. Class E2 dc-dc converter composed of a Class E amplifier and Class E rectifier. the amplifier side and rectifier side of class E2 dc-dc converter can achieve ZVS and ZDS. However, it is indicated that peak switch...
The paper describes design, simulation and laboratory measurement results of the high-frequency softswitching DC-DC converter with half-controlled output fullbridge rectifier.
Power conversion systems with transistor controlled rectifiers are widely used in modern machinery. Currently, the actual mathematical description of such systems is not sufficiently elaborated, that complicates their research and development. This paper represents the piecewise-smooth mathematical model of a three-phase controlled rectifier in regeneration mode. The results of bifurcation processes...
Low power energy harvesting systems research is increasing in recent years due to many applications such as wireless sensor node, biomedical implants, highway traffic sensor and demand for increasing the battery life. One of the major challenges of the energy harvesting systems is to convert and store usable power efficiently. This paper presented a survey about several commonly used active AC-DC...
This article discussed a multilevel transistor clamped H-bridge topology for DVR application along with repetitive controller. This five level TCHB inverter topology can be used for low and medium voltage level application of DVR. The repetitive controller used in this paper for DVR application can compensate the three major voltage quality disturbances such as balanced voltage sag, voltage harmonics...
This paper is dedicated to a special high frequency DC/DC converter with a secondary side active rectifier, which in cooperation with a novel type of active lossless snubber ensures required conditions for soft switching of all transistor switches of the converter in a wide load range. Theoretical analysis of DC/DC converter with active rectifier is done, and operation principle of the proposed soft...
In this paper a novel multilevel voltage source inverter topology is proposed for high power applications requiring expensive switching component such as, traditional Silicon, and/or newly-evolving Silicon Carbide, and/or Gallium Nitride based power semiconductor transistors. This multilevel voltage source inverter consists of several series connected newly developed single phase two transistor H-Bridge...
A wide variety of applications can benefit from near-field wireless power transfer using coupled inductive links, such as wireless sensors and implantable microelectronic devices. The use of inductive power transmission is expected to see an explosive growth over the next decade as engineers try to cut the last cord from mobile electronics, small home appliances, and even electric vehicles [1]. The...
Many applications often require a power supply with a constant voltage, e.g: a 311V output from a wind alternative source varies from 240V to 340V. Faced to this requirement, the use of a DC-DC Buck/Boost converter associated with a rectifier is required. Several architectures of the Buck/Boost choppers have been proposed in the literature; among these architectures, we find the classic Buck/Boost...
A circuit that combines an active rectifier and a linear regulator, which will be referred to as a rectulator, is proposed in this paper. The main transistor in the rectulator is used for both the rectification of the AC input (VAC) and the regulation of the DC output (VO) to reduce the overall voltage drop between VAC and VO. The rectulator has a high power efficiency (ηP) and very good amplitude...
This paper proposes a new soft-switching strategy for three-phase inverter and rectifier applications. All the main switches and auxiliary switches are turned on and turned off under zero-current-transition (ZCT) conditions. Compared to existing ZCT techniques, the diode reverse recovery is reduced. In addition, the current stresses the auxiliary switches is reduced and evenly distributed. The operational...
In this paper its present a new topology for a two — quadrant converter is presented. In the AC/DC transfer mode the converter works as a rectifier with near sinusoidal input currents (RNSIC), while in the DC/AC transfer mode it works as a square-wave pulse switching inverter. Some suggestions for the converter design are given and a comparison with two- quadrant PWM converter is made. The new converter...
This paper describes the analysis and design of a DC-DC converter topology which is operational at frequencies in the Very High Frequency (VHF) band ranging from 30 MHz-300 MHz. The presented topology, which consists of a class E inverter, class E rectifier, and self-oscillating gate driver, is inherently resonant, and switching losses are greatly reduced by ensuring Zero Voltage Switching (ZVS) of...
This paper presents the requirements for resources for electroplating processes, principles of the synchronous rectifier and its control. Main focus of the paper is on minimization of conduction losses. It describes experimental verification of the synchronous rectifier, compares the efficiency of switching power supply using a diode rectifier and a synchronous rectifier, where MOSFET transistor is...
In this work, an overview of the state-of-the-art of the design techniques of power harvesting (rectifying) circuits is presented. The evolution of each circuit, the advantages and design constraints, are investigated and compared. Furthermore, a novel 2.45 GHz power-harvesting circuit is implemented in 90 nm CMOS. Using voltage and power conversion efficiency as a FOM, the optimum rectifier topology...
DC stabilized power supplies are indispensable to any electronic system. In some cases, they are even the most important and decisive factors which affect system performances. In this paper, a new topology in which a novel two-stage interactive control strategy of controlled rectifier and linear voltage regulator is adopted is presented. The operation principle of this kind of power source is described,...
This paper addresses control techniques aimed at improving light-load efficiency and reducing harmonic distortion in digitally controlled single-phase boost power factor correction (PFC) rectifiers. Based on a discontinuous conduction mode (DCM) detection circuit, it is shown how an extension to the predictive current control law leads to improved current regulation over wide load range in both continuous...
In this paper issue of pulse width modulation (PWM) methods for bidirectional/high-performance Z-source inverter (ZSI) is presented. Due to additional switch operating with the Z-network frequency an approach is different than in basic version of ZSI. Three various PWM methods are discussed: the state-of-the-art maximum constant boost control (MCBC), maximum constant boost control with discontinuous...
A plastic medium-term analogue memory or synapse is presented that fulfils the stringent specifications necessary fory the Kohonen algorithm. The principle is based on a switched capacitor-like technique implementing a variable time-constant integrator. The memory leakage standard deviation is 2mV/s at room temperature and the learning gain can be varied over two decades. Its differential structure...
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.