A Double-T-Type Compensation Network and Its Tuning Method for IPT System

Author:

Wang, Yijie  Shi, Guangyao  Yao, Yousu  Marcos Alonso, Jose  Guo Weifeng  Liu, Xiaosheng  Xu, Dianguo  

Journal:

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS

Issue Date:

2017

Abstract(summary):

This paper presents a new design strategy for an SLCC-type compensation network in inductive power transfer (IPT) systems to achieve constant voltage output. It was found that four resonant elements (three capacitors and one inductor) can compose two symmetric T-type resonant tanks, which is well-known for its impedance transformation characteristic and reciprocity between voltage source and current source. A simplified analytical technique is used to calculate the voltage gain and parameters for each resonant element. Besides, the proposed tuning method for an S-LCC network has negligible response to high-order harmonics, allowing wide range of output voltage regulation and easy implementation of zero voltage switching. To aid designers in practical design and circuit debugging, sensitivity of one critical resonant element is analyzed. To verify the analysis, a 165W prototype with 50 mm gap and fixed voltage transfer ratio was fabricated and tested. An overall 90% efficiency was achieved from dc 70 V input to dc 30 V output.

Page:

4757---4767