The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)
针对电动汽车充电应用的感应式无线电能传输技术凭借其安全可靠、灵活方便的特点受到广泛研究。该技术所使用的松散耦合变压器通常存在较大的漏感，从而大幅降低变压器的耦合系数和系统的功率传输能力，当变压器的原副边在电动汽车泊车后发生偏移时，该特性尤为突出。提出了一种具有高偏移容限特性的感应式无线电能传输系统设计，其松散耦合变压器结合了螺线管型和双解耦绕组型线圈结构的耦合特性，可以实现更大的偏移范围；另外，给出了与所提变压器结构相匹配的电路拓扑适用条件，并分析总结了原副边采用不同的补偿拓扑以及电路输出端采用不同的连接方式时系统的输出特性。通过三维有限元仿真工具，在正对以及偏移条件下对变压器的耦合特性进行仿真分析，并在具有200 mm气隙间距的3 kW实验平台上进行实验验证。
The inductive power transfer (IPT) technology applied in electric vehicle charging is widely studied because of its features such as safety, reliability, flexibility, and convenience. The loosely coupled transformer usually has a large leakage inductance, thereby significantly reducing the transformer's coupling coefficients and the system's power transfer capability. When there is misalignment on the primary and secondary sides of the transformer after the parking of an electric vehicle, this characteristic is especially obvious. The design of an IPT system with high misalignment tolerance is proposed, in which the loosely coupled transformer combines the coupling characteristics of solenoidal and bipolar coil structures, thus realizing a wider misalignment tolerance range. In addition, the circuit topology condition that matches the transformer structure is given, and the system output characteristics with various compensation topologies on the primary and secondary sides and various output connection modes are analyzed and summarized. The transformer's coupling characteristics with and without misalignment were simulated using a 3D finite element modeling tool, and they were further experimentally verified on a 3 kW experimental platform with a 200 mm air gap.
张朱浩伯,徐德鸿,PHILIP T. Krein,马皓.一种高偏移容限的无线电能传输系统设计[J].电源学报,2021,19(1):155-164复制