A Self-Tuning LCC/SP System for Electric Vehicle Wireless Charging against Large Self- and Mutual Inductance Variations

An LCC/SP self-tuning wireless charging system is proposed herein for use in a wireless charging test bench. With different dislocations in addition to changes in the coil self-inductance and mutual inductance caused by different secondary magnetic shielding materials, the system can ensure that the...

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Bibliographic Details
Published in:Energies (Basel) 2022-06, Vol.15 (11), p.3980
Main Authors: Zhao, Yiyan, Wei, Xuezhe, Luo, Zhichao, Xiong, Meng, Dai, Haifeng
Format: Article
Language:English
Subjects:
Capacitors
Communication
Efficiency
electric vehicle
Electric vehicles
Electronic equipment
Energy
Inductance
LCC/SP compensation
Magnetic shielding
MOSFETs
Parameter identification
Power factor
Self tuning
switched capacitor
Topology
Variation
wireless energy transmission
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Summary:An LCC/SP self-tuning wireless charging system is proposed herein for use in a wireless charging test bench. With different dislocations in addition to changes in the coil self-inductance and mutual inductance caused by different secondary magnetic shielding materials, the system can ensure that the high power factor of the primary side remains unchanged without changing the circuit topology. Based on this normalized detuning LCC/SP circuit model, a switch-controlled capacitor (SCC) self-tuning method based on PI control is proposed. The control scheme employs only two MOSFETs and capacitors, without WIFI communication or parameter identification. A 2 kW experimental device was set up in the laboratory, and experimental verification was carried out with large-scale dislocations and different secondary magnetic shielding materials. The experimental results confirm that the system can maintain a high power factor (>0.9) under a system mutual inductance variation of 47.7% and secondary coil self-inductance variation of 12%, and that it can be applied in electric vehicle wireless chargers or high-power wireless charger test benches.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15113980