Title :
Improved power flow control for contactless moving sensor applications
Author :
Hu, Aiguo Patrick ; Hussmann, Stephan
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Auckland, New Zealand
Abstract :
An improved power flow control method for contactless moving sensor applications is proposed. The method allows the design of a system where sensors with different power ratings or a wide range of load variations can be implemented. A phase-controlled variable inductor is used to tune the resonant circuit of the power pickups of an inductively coupled power transfer (ICPT) system according to the actual power requirements of the sensors, thereby, helping to reduce the power losses without affecting the maximum power transfer capacity. Soft switching is achieved in the variable inductor control, and the effect of the equivalent tuning parameters on the power flow is analyzed theoretically. Simulation results show that a significant improvement of the existing controllers is achieved at no load or very lightly loaded conditions.
Keywords :
inductive power transmission; load flow control; phase control; power control; power inductors; sensors; contact-less moving sensor applications; equivalent tuning parameters; inductively coupled power transfer system; load variations; maximum power transfer capacity; phase-controlled variable inductor; power flow control; power losses reduction; power ratings; resonant circuit tuning; soft switching; Capacitive sensors; Coupling circuits; Design methodology; Inductors; Lighting control; Load flow; Load flow control; Load management; RLC circuits; Sensor systems;
Journal_Title :
Power Electronics Letters, IEEE
DOI :
10.1109/LPEL.2004.841311
