NDLI: Single-phase ac to high-voltage dc converter with soft-switching and diode-capacitor voltage multiplier

Content Provider	IET Digital Library
Author	Young, Chung Ming Wu, Sheng Feng Chen, Ming Hui Chen, Sing Jhao
Abstract	This paper proposes a single-phase, soft-switching, high step-up ac–dc converter based on a diode-capacitor voltage multiplier (DCVM) with a power factor correction (PFC). By applying the PFC technology, the proposed converter promises a near-unity power factor and a low distortion line current, while providing an adjustable, high step-up dc voltage that the conventional DCVM circuits cannot achieve. To reduce the switching losses, an auxiliary circuit for implementing a soft commutation is added to the power stage of the proposed converter. For operating at a fixed switching frequency, both the main and the auxiliary switches in the power stage are turned off with the zero-current transmission (ZCT). The operating principle, the design considerations and the control strategy of the proposed converter all are detailed and investigated in this paper. A 1.2 kV/500 W laboratory prototype, which employs a commercial PFC IC UC3854 as a controller, is built for test, measurement and evaluation. Under the full-load conditions, the measured power factor, the total harmonic distortion of the line current and the system efficiency are 99.6, 4.86 and 94%, respectively. The experimental results demonstrate the validity of the proposed converter.
Starting Page	1704
Ending Page	1713
Page Count	10
ISSN	17554535
Volume Number	7
e-ISSN	17554543
Issue Number	Issue 7, Jul (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/7/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2013.0489
Journal	IET Power Electronics
Publisher Date	2014-03-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC-DC Power Converter Analogue Circuit Auxiliary Circuit Auxiliary Switch Capacitor Commutation DCVM Circuit Diode Diode-capacitor Voltage Multiplier Distortion Line Current Efficiency 4.86 Percent Efficiency 94 Percent Efficiency 99.6 Percent Flxed Switching Frequency Harmonic Distortion High-voltage DC Converter Loss PFC IC UC3854 Power 500 W Power Capacitor Power Electronics Power Factor Correction Power Factor Measurement Power Supply Single-phase Soft-switching High Step-up AC-DC Converter Soft Commutation Supervisory Circuit Switching Loss Reduction Total Harmonic Distortion Voltage 1.2 KV Voltage Multipliers ZCT Zero Current Switching Zero Voltage Switching
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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