C
Cong Zheng
Researcher at Virginia Tech
Publications - 39
Citations - 2250
Cong Zheng is an academic researcher from Virginia Tech. The author has contributed to research in topics: Power factor & Capacitor. The author has an hindex of 18, co-authored 38 publications receiving 1894 citations. Previous affiliations of Cong Zheng include Illinois Institute of Technology & University of Virginia.
Papers
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Journal ArticleDOI
Kinetic Energy Harvesting Using Piezoelectric and Electromagnetic Technologies—State of the Art
TL;DR: The latest progress in kinetic energy harvesting for wide applications ranging from implanted devices and wearable electronic devices to mobile electronics and self-powered wireless network nodes is presented.
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A Novel Valley-Fill SEPIC-Derived Power Supply Without Electrolytic Capacitor for LED Lighting Application
TL;DR: In this paper, a power factor correction (PFC) topology is proposed by inserting the valley-fill circuit in the single-ended primary inductance converter (SEPIC)-derived converter, which can reduce the voltage stress of the storage capacitor and output diode under the same power factor condition.
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Hybrid-Switching Full-Bridge DC–DC Converter With Minimal Voltage Stress of Bridge Rectifier, Reduced Circulating Losses, and Filter Requirement for Electric Vehicle Battery Chargers
TL;DR: In this article, a hybrid-switching phase-shift full-bridge dc-dc converter is derived for electric vehicle battery chargers, which provides wide zero-voltage switching range in the leading leg switches, achieves zero-current switching for lagging-leg switches, and uses a hybrid switching method to avoid freewheeling circulating losses in the primary side.
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Modeling and Control of Series–Series Compensated Inductive Power Transfer System
Zaka Ullah Zahid,Zakariya Dalala,Cong Zheng,Rui Chen,William Eric Faraci,Jih-Sheng Jason Lai,Gianpaolo Lisi,Dave Anderson +7 more
TL;DR: A T-equivalent circuit for loosely coupled transformer, which does not involve magnetic coupling, is presented and a detailed dynamic analysis based on extended describing function technique is presented for a series-series compensated inductive power transfer system.
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High-Efficiency Contactless Power Transfer System for Electric Vehicle Battery Charging Application
Cong Zheng,Jih-Sheng Lai,Rui Chen,William Eric Faraci,Zaka Ullah Zahid,Bin Gu,Lanhua Zhang,Gianpaolo Lisi,Dave Anderson +8 more
TL;DR: In this article, a contactless charging system for an electric vehicle (EV) battery is proposed, which consists of three parts: 1) a high-frequency power supply from a full-bridge inverter with frequency modulation; 2) a loosely coupled transformer that utilizes series resonant capacitors for both the primary and secondary windings; and 3) a rectification output circuit that uses a fullbridge diode rectifier.