Abstract
The phase-shifted full-bridge (PSFB) converter is widely employed in high-power applications. However, circulating current, duty-cycle loss, secondary voltage oscillation, and narrow zero-voltage-switching (ZVS) range are the main drawbacks of the conventional PSFB converter. This paper proposes a novel full-bridge converter to improve the performance of the conventional PSFB converter. The proposed converter contains two paralleled half-bridge inverters and an auxiliary inductor on the primary side. The rectifier stage is composed of six diodes connected with the form of full-bridge rectification. This structure allows the stored energy for ZVS operation to change adaptively with duty-cycle. The power can be transferred from the primary side to the secondary side during the whole period. Therefore, the requirement of output filter inductance is reduced and the circulating current is removed. The proposed converter is a good candidate for high power, high voltage and variable input voltage applications. The operation principle and performance are verified on a laboratory prototype.
Highlights
The traditional full-bridge DC/DC converter with phase-shifted control can achieve zero-voltageswitching (ZVS) without any additional devices
The converter can achieve high efficiency and power density. These advantages make the phase-shifted full-bridge (PSFB) converter well-suited for high efficiency, power density, and reliability applications [1,2,3,4,5,6]
The drawback of the PSFB converter is the dependency of the ZVS
Summary
The traditional full-bridge DC/DC converter with phase-shifted control can achieve zero-voltageswitching (ZVS) without any additional devices. Loss of ZVS at light loads results in low efficiency and high electro-magnetic interference (EMI) due to the increase of switching losses [5] Another drawback is the existence of circulating current, which will significantly increase conduction loss [6]. Energies 2017, 10, 444 range of load conditions, and circulating current can be removed by ZCS operation These ZVZCS converters result in high secondary-voltage stress and increase the ripple of output voltage. The proposed converter is well for theprinciple high-output-voltage current, filter which results inislow efficiency and power density Because of these applications, a large filter inductor is required to reducethe the performance ripple analysis applications.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
