Adaptive Bidirectional Inductive Power and Data Transmission System

For the research of wireless power transfer, loosely coupled inductive power transfer (LCIPT) is one of the widely adopted technologies. There are already various researches focusing on development of high-efficiency LCIPT. However, when the transmission and receiver coils are misaligned, the power...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2021-07, Vol.36 (7), p.7550-7563
Main Authors: Kao, Jia-Jing, Lin, Chun-Liang, Liu, Yu-Chen, Huang, Chih-Cheng, Jian, Hau-Shian
Format: Article
Language:English
Subjects:
Coils
Conduction
Data communication
Data transmission
Efficiency
Electric vehicle
Fuzzy control
Inductance
Induction coils
Inverters
loosely coupled inductive power transfer (LCIPT)
Maximum power transfer
Power transmission
Pulse duration
Quadrature amplitude modulation
RLC circuits
SAE TIR J2954
Signal transmission
Wireless communication
wireless power transfer
Wireless power transmission
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Summary:For the research of wireless power transfer, loosely coupled inductive power transfer (LCIPT) is one of the widely adopted technologies. There are already various researches focusing on development of high-efficiency LCIPT. However, when the transmission and receiver coils are misaligned, the power transfer efficiency will be significantly dropped. This article considers the change of mutual inductance when two induction coils are misaligned. A fuzzy control approach to solve for this problem by adaptively adjusting operational frequency is introduced. Experiments show that it can reduce the power transferring efficiency drop by 11% when two conduction coils are misaligned up to 50 mm. This research also supports adaptive maximum power transfer using tracking mechanism. Before conducting power transmission, the system can choose G2V or V2G according to the vehicle battery capacity via handshaking communication without the need of radio frequency links. In addition, the phase shift pulsewidth modulation technique is proposed for simultaneous data transmission enabling binary quadrature amplitude modulation for digital signal transmission. Fast over current protection is incorporated for power transfer safety when current overload happens. The transmission frequency of this article is controlled to meet the frequency specified by SAE TIR J2954 .
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2020.3047069