NDLI: Load and mutual inductance estimation based on phase-differences for electric vehicle wireless charging system

Content Provider	IET Digital Library
Author	Zhang, Yuwang Guo, Yanjie Zhu, Qingwei Wang, Lifang
Abstract	In this study, a new method to estimate the load and mutual inductance for a wireless charging system (WCS) is presented. Instead of simultaneously using the root mean square and phase angles of related voltages and currents, accurate estimations can be obtained through the phase differences in the primary side. Firstly, the WCS model with dual-side inductor–capacitor–capacitor compensation networks is established, and the reflected impedance is analysed based on the phase differences in the primary side. Then, the estimation calculation of load and mutual inductance is derived according to the reflected impedance. Meanwhile, the output voltage estimation in the primary side is realised based on the estimated values of the load and mutual inductance. Finally, experiments are conducted to verify the effectiveness of the proposed method in the 3.3 kW electric vehicle wireless charging experiment platform. Experimental results show that the estimation errors of the load and mutual inductance are <5 and 3.5%, respectively, and the system output voltage can be effectively estimated based on their estimated results.
Starting Page	2345
Ending Page	2352
Page Count	8
ISSN	17554535
Volume Number	12
e-ISSN	17554543
Issue Number	Issue 9, Aug (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/12/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.5194
Journal	IET Power Electronics
Publisher Date	2019-06-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Accurate Estimations Battery Powered Vehicle Capacitor Compensation Control of Electric Power System Electric Vehicle Estimated Result Estimated Value Estimation Error Inductance Inductive Power Transmission Inductor Inductor–capacitor–capacitor Compensation Networks Mutual Inductance Other Power Apparatus And Electric Machine Output Voltage Estimation Phase Angles Phase Differences Phase-differences Power 3.3 KW Power Capacitor Reflected Impedance Root System Output Voltage Transportation Wireless Charging System
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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