1. A Single-Stage Inductive-Power-Transfer Converter for Constant-Power and Maximum-Efficiency Battery Charging.
- Author
-
Huang, Zhicong, Lam, Chi-Seng, Mak, Pui-In, Martins, Rui Paulo da Silva, Wong, Siu-Chung, and Tse, Chi K.
- Subjects
- *
AC DC transformers , *IMPEDANCE matching , *LOW voltage systems , *BATTERY chargers , *ELECTRIC batteries , *WIRELESS communications , *ELECTRIC vehicle batteries - Abstract
This article proposes a single-stage inductive-power-transfer (IPT) converter operating as a wireless constant-power (CP) and maximum-efficiency battery charger. By maintaining a constant output power rather than providing a constant output current throughout the dominant stage of battery charging, the IPT converter can make the utmost of its power capability, thus having a faster charging rate. The proposed single-stage IPT converter adopts series–series compensation and includes a switch-controlled capacitor (SCC) and a semiactive rectifier (SAR) in the secondary side. Manipulating the SCC and the SAR to emulate the optimum impedance of the resonator and the load, we propose a novel operation approach combining the merits of load-independent transfer characteristic and load impedance matching, to achieve a simple solution to CP charging and maximum efficiency throughout the charging process. Since the control scheme is based on fixed operating frequency and secondary-side real-time regulation, wireless feedback communication is not required. Moreover, soft switching and low voltage stress can be easily achieved in this IPT converter. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF