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 soft switching active-clamp dual series-resonant converter is proposed in this paper. Two small transformers are used at the proposed topology to provide more load power. An active-clamp circuit is used to absorb the energy stored in the leakage inductor of transformer, to clamp voltage stresses across switches, and to realize the ZVS turn-on of switches in order to alleviate the switching losses...
In this paper, a step-up active-clamp SEPIC with bi-transformer is presented for battery sourcing application. Two voltage double circuits are connected in series at secondary side, thus, the output voltage could be increase compared with the conventional isolated SEPIC converter. The voltage double circuit at secondary side provides high voltage gain and limits the voltage spike on output diodes...
This paper presents an interleaved converter to share the load current and achieve soft switching feature on switches. There are two modules in the proposed converter. Two modules are operated with the interleaved PWM to achieve load current sharing, reduce the current ripple on the output capacitor, and regulate the output voltage. In each module, there are two circuit cells to achieve parallel operation...
This paper presents a soft switching converter with interleaved pulse-width modulation (PWM) scheme. There are two circuit modules in the proposed converter to share the load current. The interleaved PWM scheme is adopted to control two converter modules such that the input and output ripple currents and the current stresses on power switches and transformer windings are reduced. In each converter...
A dual resonant converter using active clamp circuit is presented in this paper. The active clamp circuit is employed to limit the voltage stress and create zero-voltage-switching (ZVS) turn-on feature for power switches. Moreover, the dual resonant tanks are composed by the leakage inductors and resonant capacitors to achieve zero-current-switching (ZCS) turn-off mechanism for diodes at the secondary...
A novel zero voltage switching (ZVS) converter with output voltage doubler is presented. The output voltage doubler is used on the output side to achieve the boost type of voltage conversion ratio. Active-clamping technique is adopted to realize the ZVS turn-on of all switches, release the energy stored in the transformer leakage inductance and limit the voltage stresses on power switches. The ZVS...
This paper presents a zero voltage switching (ZVS) Cuk converter with double ended rectifier to reduce switching losses on power semiconductors, decrease voltage stresses on rectifier diodes and achieve power delivery to output load in positive and negative half cycle of the secondary winding voltage. An auxiliary switch and a clamp capacitor are connected in parallel with the primary side of the...
This paper presents the system analysis and circuit characteristics of an interleaved soft switching DC-DC converter. One auxiliary switch and one fast recovery diode are connected between the half-bridge leg and the middle point of split capacitors to generate three different voltage levels on the primary side of transformer. The zero voltage switching (ZVS) is achieved at the transition interval...
This paper presents a new isolated dc/dc converter with zero-voltage turn-on switching (ZVS) of power switches and zero-current turn-off switching (ZCS) of diodes. In conventional flyback converter, the main drawbacks are high voltage stresses on power devices large transformer size, and serious reverse recovery current which resulted in high voltage spike across output diode. To solve these problems,...
A bidirectional ZVS DC-DC converter with active clamp topology is proposed. The proposed converter is based on the forward converter with center-tapped rectifier at the transformer secondary side. Active clamp topology is used in the forward converter to achieve ZVS feature of power switches and to regulate the output voltage at the desired value. The proposed converter has the advantages of high...
This paper presents the system analysis and circuit implementation of a soft switching converter based on buck-flyback topology to have a large voltage step-down between the output and input sides. Compared with the conventional buck converter, the proposed converter has wide turn-on period so that the lower output voltage can be achieved. An active snubber circuit is connected in parallel with the...
This paper presents the system analysis and implementation of a soft switching Sepic-Cuk converter to achieve zero voltage switching (ZVS). In the proposed converter, the Sepic and Cuk topologies are combined together in the output side. The features of the proposed converter are to reduce the circuit components (share the power components in the transformer primary side) and to share the load current...
A bidirectional dc converter with high conversion ratio is presented in this paper to have the capability of bidirectional power flow. Two boost conversion stages are adopted in the converter to achieve high voltage step-up conversion. The other power flow direction can also be achieved in the proposed converter with low voltage step-down conversion. Comparison with the conventional boost converter...
A dual-output LLC resonant converter for LCD-TV applications is presented in this paper. Based on the LLC resonant behavior, the power MOSFETs are turned on at zero voltage switching (ZVS) and secondary rectifier diodes are turned off at zero current switching (ZCS). In the proposed converter, the primary windings of two transformers are connected in series so that the primary currents of two transformers...
A soft switching sepic converter with active clamp scheme is presented in this paper to achieve zero voltage switching (ZVS) on the power switches. The active clamp topology is used in the circuit to limit the voltage stresses of power semiconductors. When main switch is turned off, the positive resonant inductor current flows through the anti-parallel diode of auxiliary switch so that the auxiliary...
According to the basic characteristics of arc welding and cutting, digital control system of ZVS arc welding/cutting inverter power source is researched and developed. This paper discusses the realizing principle of ZVS (zero voltage switch) soft switching in detail, analyzes the relation of the key component parameters and realization of ZVS, describes the realization method of phase-shifted PWM...
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.