| 摘要: |
| 针对电动汽车无线充电系统因偏移导致充电效率降低的实际问题，提出一种新型强抗偏移的恒流无线充电系统。首先，在磁耦合设计上，引入DDQD大解耦线圈有效减缓X、Y两方向偏移耦合系数衰减，通过与DDQ线圈的对比体现所提出的DDQD线圈在抗偏移方面的优越性。然后，在补偿拓扑设计上，通过DDQD线圈将随耦合系数呈不同变化趋势的LCC拓扑和LC拓扑进行串联，使输出功率变化平缓，进一步提高了系统的抗偏移能力，并且使系统具有恒流输出特性。最后，通过仿真实验验证了该方案的有效性，在磁耦合机构发生偏移时，减缓了无线充电系统的线圈耦合系数和传输效率的下降程度，具有一定的现实意义。 |
| 关键词: 电动汽车 无线电能传输 恒流输出 抗偏移 串联混合型 |
| DOI：10.19783/j.cnki.pspc.240034 |
| 投稿时间：2024-01-07修订日期：2024-05-22 |
| 基金项目:国家自然科学基金项目资助(52177185) |
|
| An anti-offset hybrid topology constant current wireless charging system |
| LIANG Yuqing,TANG Zhong |
| (School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China) |
| Abstract: |
| There is a practical problem of reduced charging efficiency due to offset in the wireless charging system for electric vehicles. Thus a new type of strong offset-resistant constant-current wireless charging system is proposed. First, in the magnetic coupling design, a DDQD large decoupling coil is introduced to effectively slow down the attenuation of the coupling coefficients of the X and Y direction offsets, and the comparison with the DDQ coil reflects the superiority of the proposed DDQD coil in anti-offset. Then, in the compensation topology design, the LCC and LC topologies, which have different trends with the coupling coefficients, are connected in series by DDQD coils, so that the output power changes are smoothed out. This further improves the system’s ability to resist offsets and provides the system with constant-current output characteristics. Finally, the effectiveness of the scheme is verified through simulation. The scheme slows down the degradation degree of the coil coupling coefficient and transmission efficiency of the wireless charging system when the magnetic coupling mechanism is offset. This is of practical significance. |
| Key words: electric vehicle wireless power transfer constant current output misalignment tolerance series hybrid structure |
