Analysis on the regions of stability for inductive coupled power transfer systems
SUN Yue
CHEN Yu
TANG Chun-sen
JIANG Cheng
GE Xue-jian
Abstract：Inductive coupled power transfer (ICPT) is the most widely used technology for wireless power transferring. To improve the efficiency, soft-switching technology is usually applied to ICPT systems. However, soft switching also brings the problem of multiple soft-switching frequency, which makes the behavior of ICPT systems complex. Such behavior could be well explained by the regions of stability (RoS). With series-series ICPT systems as an example, this paper proposed an improved algorithm for computing the RoS of ICPT systems. First, both the piecewise linear model and impact map model are constructed. Taking advantage of ICPT systems'symmetry, the impact model is simplified. Then the stability criteria based on quadratic Lyapunov function are derived. With stability criteria as constraints and the size of RoS as an object, the RoS is obtained by genetic algorithm. At last, the proposed method is verified by an example system. The resulting RoS of the proposed method is much larger than the results of existing methods, making the characteristics of soft-switching ICPT systems clearer. The proposed method can also be used to compute the RoS of limit cycles for other piecewise linear systems, making it useful when studying and designing such systems.
Keywords：stabilityregion of stabilityinductive coupled power transferwireless power transferpiecewise linear systems
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 1293-1302 )