Title :
A Frequency Control Method for Regulating Wireless Power to Implantable Devices
Author :
Ping Si ; Hu, Aiguo Patrick ; Malpas, S. ; Budgett, D.
Author_Institution :
Univ. of Auckland, Auckland
fDate :
3/1/2008 12:00:00 AM
Abstract :
This paper presents a method to regulate the power transferred over a wireless link by adjusting the resonant operating frequency of the primary converter. A significant advantage of this method is that effective power regulation is maintained under variations in load, coupling and circuit parameters. This is particularly important when the wireless supply is used to power implanted medical devices where substantial coupling variations between internal and external systems is expected. The operating frequency is changed dynamically by altering the effective tuning capacitance through soft switched phase control. A thorough analysis of the proposed system has been undertaken, and experimental results verify its functionality.
Keywords :
capacitance; frequency control; heat conduction; inductive power transmission; phase control; prosthetic power supplies; effective tuning capacitance; frequency control method; heat conduction; implanted medical devices; inductive power transfer; power efficiency; push-pull resonant converter; soft switched phase control; wireless power regulation; wireless supply; Capacitance; Circuit optimization; Control system analysis; Coupling circuits; Frequency control; Frequency conversion; Phase control; Resonance; Resonant frequency; Tuning; Frequency control; inductive power transfer; wireless power (WP);
Journal_Title :
Biomedical Circuits and Systems, IEEE Transactions on
DOI :
10.1109/TBCAS.2008.918284