| Optimal design of LCC-S wireless power transfer system considering rectifier load characteristics |
| 投稿时间：2022-10-25 修订日期：2023-02-17 |
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| English Abstract: |
| The rectifier load in the wireless power transfer(WPT) system has nonlinear characteristics. In the analysis of system transmission characteristics and the design of resonance parameters, the fundamental harmonic approximation(FHA) is often adopted which regards the rectifier load as an equivalent resistance, resulting in a certain deviation between the theoretical analysis and the actual case, and the system deviates from the resonance state. To solve this problem, the LCC-S WPT system is taken as the research target, and the transmission characteristics of the system are analyzed considering the harmonics and the nonlinea-rity of rectifier load. The calculation method of load impedance and the parameter of resonant capacitor in series at the receiver-side based on rectifier load compensation is proposed, and the switching characteristics of the inverter circuit are analyzed and verified. The proposed design method of receiver-side resonance parameters can make the receiver loop of the system resonant and improve the output power of the system, reduce the turn-off current of the inverter switches and improve the transmission efficiency of the system. A 2.5 kW experiment platform of LCC-S WPT system is built, which verifies the effectiveness and correctness of both theoretical analysis and the proposed parameter design method. |
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| English and key words:wireless power transfer LCC-S fundamental harmonic approximation rectifier load resonance parameter design |
| 基金项目:中央高校基本科研业务费专项资金资助项目(2021RC227) |
| DOI：10.16081/j.epae.202303012 |
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