Efficient Resonant Inductive Coupling Energy Transfer Using New Magnetic and Design Criteria
- Citation:
- Valtchev, S., K. Brandisky, B. Borges, and B. J. Klaassens, "Efficient Resonant Inductive Coupling Energy Transfer Using New Magnetic and Design Criteria", IEEE 36th Power Electronics Specialists Conference, PESC '05, pp. 1293–1298, June, 2005.
Date Presented:
JuneAbstract:
This paper describes some theoretical and experimental results obtained in an effort to optimize the Series Resonant Converter (SRC) when used with a loosely coupled transformer for Inductive Coupling Power Transfer (ICPT). The main goal of this work is to define precisely which mode of operation of the power stage is the most efficient. The results also suggest a way to choose the design criteria for the physical parameters (operation frequency, characteristic impedance, transformer ratio, etc.) to achieve that mode of operation. The analysis involves also the investigation of the separated in two halves pot core ferrite transformer, especially the way it changes its magnetizing and leakage fluxes and hence, inductances. It is shown that for the practical values of the separation distance, the leakage inductance remains almost unchanged. Nevertheless the current distribution between the primary and the secondary windings changes drastically due to the large variation of the magnetizing inductance. The analysis has lead to a set of equations with solutions that show graphically the way to an optimized operation of the converter, i.e. higher primary currents and higher transformer ratios to fit in the desired mode.
