Title :
Hybrid IPT Topologies With Constant Current or Constant Voltage Output for Battery Charging Applications
Author :
Xiaohui Qu ; Hongdou Han ; Siu-Chung Wong ; Tse, Chi K. ; Wu Chen
Author_Institution :
Sch. of Electr. Eng., Southeast Univ., Nanjing, China
Abstract :
The inductive power transfer (IPT) technique in battery charging applications has many advantages compared to conventional plug-in systems. Due to the dependencies on transformer characteristics, loading profile, and operating frequency of an IPT system, it is not a trivial design task to provide the battery the required constant charging current (CC) or constant battery charging voltage (CV) efficiently under the condition of a wide load range possibly defined by the charging profile. This paper analyzes four basic IPT circuits with series-series (SS), series-parallel (SP), parallel-series (PS), and parallel-parallel (PP) compensations systematically to identify conditions for realizing load-independent output current or voltage, as well as resistive input impedance. Specifically, one load-independent current output circuit and one load-independent voltage output circuit having the same transformer, compensating capacitors, and operating frequency can be readily combined into a hybrid topology with fewest additional switches to facilitate the transition from CC to CV. Finally, hybrid topologies using either SS and PS compensation or SP and PP compensation are proposed for battery charging. Fixed-frequency duty cycle control can be easily implemented for the converters.
Keywords :
inductive power transmission; secondary cells; PP compensations; PS compensations; SP compensations; SS compensations; battery charging applications; compensating capacitors; constant battery charging voltage; constant charging current; constant current output; constant voltage output; hybrid IPT topologies; inductive power transfer technique; load-independent current output circuit; load-independent voltage output circuit; parallel-parallel compensations; parallel-series compensations; resistive input impedance; series-parallel compensations; series-series compensations; Batteries; Battery chargers; Frequency control; Impedance; Integrated circuit modeling; Reactive power; Topology; Battery charging; Inductive power transfer; battery charing, constant-current output; constant current (CC) output; constant voltage (CV) output; constant-voltage output; inductive power transfer (IPT); resistive input impedance; resistive input impedance.;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2015.2396471