An Inductive-Power-Transfer Converter with High Efficiency Throughout Battery-Charging Process

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

35 Scopus Citations
View graph of relations



Original languageEnglish
Article number8606167
Pages (from-to)10245-10255
Journal / PublicationIEEE Transactions on Power Electronics
Issue number10
Online published9 Jan 2019
Publication statusPublished - Oct 2019
Externally publishedYes


An inductive power transfer (IPT) converter usually has an optimum efficiency only at a matched load. Because of wide load range variation during battery charging, it is challenging for an IPT converter to achieve the required output and maintain high efficiency throughout the charging process. In this paper, a series-series compensated IPT converter with an active rectifier is analyzed and implemented for battery charging. Appropriate operations are employed for constant-current charging and constant-voltage (CV) charging. A novel operation approach is proposed to achieve constant output voltage and to ensure load impedance matching during CV charging without the help of an extra DC-DC converter, which incurs loss. Both a frequency modulated primary inverter and a phase-angle modulated secondary active rectifier can achieve soft switching. High efficiency can be maintained during the whole battery-charging profile.

Research Area(s)

  • Battery charging, efficiency optimization, inductive power transfer (IPT), soft switching