Dual-Side Phase-Shift Control for Strongly Coupled Series–Series Compensated Electric Vehicle Wireless Charging Systems
Abstract
:1. Introduction
- (1)
- Synchronous rectification is normally conducted to the secondary-side rectifier of the loosely coupled WPT systems to improve efficiency [9,10]. However, it is found in strongly coupled WPT systems that this will result in the primary-side inverter working in hard switching, leading to decreasing efficiency and potential circuit failures. Additionally, in loosely coupled WPT systems, dual-side phase-shift control is seldomly used to regulate the secondary-side charging current due to the fact that too much reactive power will be introduced if the phase difference between the primary-side and secondary-side voltages is not 90°. However, in strongly coupled WPT systems, since the coupling coefficient is large, the efficiency can still be high even though the phase difference is not 90°. Thus, the secondary-side charging current and even bidirectional power flow can be easily regulated. The contributions of this paper include building the mathematical model of dual-side phase-shift control for strongly coupled WPT systems;
- (2)
- Investigating the performance of dual-side phase-shift control for strongly coupled WPT systems;
- (3)
- Revealing that synchronous rectification is not suitable for strongly coupled WPT system because soft switching can be lost;
- (4)
- Experimentally validating the model and analysis.
2. Mathematical Modelling
2.1. First Harmonic Approximation
2.2. Time-Domain Modelling
2.3. Comparison of FHA and Model Based on Differential Equations
3. Experimental Validation
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Parameters | Values |
---|---|
Airgap | 40 mm |
f0 | 83.3 kHz |
L1 | 169.7 μH |
L2 | 169.8 μH |
C1 | 21.5 nF |
C2 | 21.5 nF |
k | 0.64 |
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Share and Cite
Zhang, Y.; Shen, Z.; Wu, Y.; Wang, H.; Pan, W. Dual-Side Phase-Shift Control for Strongly Coupled Series–Series Compensated Electric Vehicle Wireless Charging Systems. World Electr. Veh. J. 2022, 13, 6. https://doi.org/10.3390/wevj13010006
Zhang Y, Shen Z, Wu Y, Wang H, Pan W. Dual-Side Phase-Shift Control for Strongly Coupled Series–Series Compensated Electric Vehicle Wireless Charging Systems. World Electric Vehicle Journal. 2022; 13(1):6. https://doi.org/10.3390/wevj13010006
Chicago/Turabian StyleZhang, Yiming, Zhiwei Shen, Yuanchao Wu, Hui Wang, and Wenbin Pan. 2022. "Dual-Side Phase-Shift Control for Strongly Coupled Series–Series Compensated Electric Vehicle Wireless Charging Systems" World Electric Vehicle Journal 13, no. 1: 6. https://doi.org/10.3390/wevj13010006