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 new zero-current switching (ZCS) pulse-width modulated (PWM) boost converter is proposed in the paper. The main power switch in the proposed converter can operate with ZCS due to an active auxiliary circuit that diverts current away from the switch just before it is turned off. The circuit allows the converter to operate with ZCS without the disadvantages typically found in other, previously proposed...
A new ZCT-PWM cell, which reduces the current stress of the main switch and the rectifier diodes in DC-DC converter, is proposed and analyzed in this paper. Based on the ZCT-PWM cell a boost DC-DC converters is constructed, and it is analyzed to demonstrate the operation principle of the new ZCT cell. This type converter is suitable for high power high frequency application due to it's fully soft...
It is usually considered that if the ZVS performance of phase-shift (PS) ZVS full-bridge (FB) converter can be achieved with the help of auxiliary circuits at light load, then the ZVS performance can be achieved naturally at heavy load. However under certain circumstance, the drain to source capacitor will be recharged during the commutating period. Therefore, the ZVS performance of lagging leg may...
In this paper, a new mathematical model of a three-phase, three-switch, three-level rectifier is presented. The model is valid under both continuous and discontinuous operating modes. The applied modeling technique is based on the switching functions concept. The obtained model is represented by time-variant state equations, which offer high simplicity for computer implementation. The proposed model...
A novel single-phase rectifier is introduced in this paper, which consists of a front-end full-bridge diode rectifier followed by a ZVS boost active clamping converter. By using an auxiliary switch and a capacitor, ZVS for all switches is achieved without any additional magnetic component. To eliminate the voltage ringing across the main rectifier diode, a small diode is added. Applying the proposed...
In this paper, a novel proposal of the utility-interactive three-phase soft commutation sinewave PWM power conditioner with an auxiliary active resonant DC-link snubber is developed for the fuel cell and the solar power generation systems. The prototype of this power conditioner consists of a PWM boost chopper cascaded three-phase power conditioner, a single two-switch auxiliary resonant DC-link snubber...
This paper presents a new circuit topology of DC bus line switch-assisted full-bridge soft switching PWM inverter type DC-DC converter. The proposed power converter is composed of typical voltage source H full-bridge high frequency PWM inverter with a high frequency transformer link in addition to a single DC bus line side power semiconductor switching device for PWM control scheme and a capacitive...
In this paper, an AC-DC-AC three-phase transmission system that employs two six-switch inverters is studied. The inverters are connected by an inductive DC link, and are controlled in order to ensure a high power factor at the source side, a regulated voltage at the DC side and low-distorted currents at the load side. The inverters are modeled in the average regime in order to design suitable regulators...
We have already reported the novel digital control method "static model reference" which is the improved smart digital reference of output voltage for its digitally controlled dc-dc converter. The circuit mechanism and the static characteristics have been cleared. This paper presents dynamic characteristics of the digitally controlled dc-dc converter with static model reference. Moreover,...
If the voltage of rectangular waveform produced in the inverter is used as a dc power supply through a half-wave rectifier, a smoothing capacitor and reactor can be made extremely small by using asymmetric two phase system. Although this basic concept has been already reported, the basic operation of the amplitude modulation converter, used in this system as a key element, has not been clarified yet...
A novel two-phase buck converter suitable to apply the power supplies for MPU is proposed. Compared to conventional two-phase buck converter, the proposed converter essentially has double step-down ratio as Eo/Ei = D/2 and high efficiency is realized by reducing the switching loss of the switching elements. In addition the current ripple of the output smoothing capacitor is improved to the same value...
A new implementation of a non-isolated, two-inductor, two-switch boost converter topology that features a common ground for the source and load is described. The new circuit exhibits a significantly reduced common-mode noise compared to its counterpart that is implemented with separate source and load grounds. The EMI performance of the proposed implementation was experimentally verified on a 540-W...
In this paper, various kinds of ripple reduction topologies for switching converters are presented. A ripple canceller employing auxiliary switches is initially introduced and its steady state and small signal ac analysis are examined. Next, a ripple canceller using a voltage transformer, which needs no additional switches and drive circuits, are proposed. Finally, a ripple reduction circuit employing...
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.