Cong Zheng

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.

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.

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.

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.