Subjects: Dynamic and Electric Engineering >> Electrical Engineering submitted time 2019-03-05 Cooperative journals: 《电气工程学报》
Abstract：传统的感应耦合电能传输（ICPT）系统中，松耦合变压器接收线圈 Rx 的 半径与发射线圈 Tx 到接收线圈 Rx 之间的距离 h 的最佳比例系数，即径距比 γ 的求取， 是通过系统建模来推出 Tx 和 Rx 间的互感值，并辅以大量实验来获得的。针对这种缺 少理论依据并浪费人力、物力的问题，本文提出了一种通过仿真观察 Rx 中电流密度变 化规律来获得 Rx 半径与 h 比例系数的最佳值的设计方法。首先求取单管 ICPT 系统之 一次侧并联、二次侧并联（PP）结构下的系统去耦等效电路模型，据此推导出 Rx 上 的电流密度和互感 M、系统传输功率的关系；并通过公式分析，确定 Rx 电感 L1 与 Tx 电感 L2 的比值 a 和系统的耦合系数 λ 的取值，来确定在不同频率下 L1 和 L2 的值，从 而建立仿真模型，利用有限元仿真软件对 γ 的最优值进行研究。相比于通过线圈互感 值来优化线圈的方法，本文中的电流密度可以通过软件直接观测到，形象而且直观，节省时间和成本，有效提高设计效率。综合仿真结果确定了松耦合线圈最佳径距比γ，该参数与企业通过生产实践总结出的经验值相吻合。
Subjects: Dynamic and Electric Engineering >> Electrical Engineering submitted time 2019-03-05 Cooperative journals: 《电气工程学报》
Abstract：传统的感应耦合电能传输（ICPT）系统中，松耦合变压器接收线圈 Rx 的 半径与发射线圈 Tx 到接收线圈 Rx 之间的距离 h 的最佳比例系数，即径距比 γ 的求取， 是通过系统建模来推出 Tx 和 Rx 间的互感值，并辅以大量实验来获得的。针对这种缺 少理论依据并浪费人力、物力的问题，本文提出了一种通过仿真观察 Rx 中电流密度变 化规律来获得 Rx 半径与 h 比例系数的最佳值的设计方法。首先求取单管 ICPT 系统之 一次侧并联、二次侧并联（PP）结构下的系统去耦等效电路模型，据此推导出 Rx 上 的电流密度和互感 M、系统传输功率的关系；并通过公式分析，确定 Rx 电感 L1 与 Tx 电感 L2 的比值 a 和系统的耦合系数 λ 的取值，来确定在不同频率下 L1 和 L2 的值，从 而建立仿真模型，利用有限元仿真软件对 γ 的最优值进行研究。相比于通过线圈互感 值来优化线圈的方法，本文中的电流密度可以通过软件直接观测到，形象而且直观，节省时间和成本，有效提高设计效率。综合仿真结果确定了松耦合线圈最佳径距比γ，该参数与企业通过生产实践总结出的经验值相吻合。
Subjects: Mechanical Engineering >> Other Disciplines of Mechanical Engineering submitted time 2018-06-15 Cooperative journals: 《电气工程学报》
Abstract： In the traditional system of ICPT, to calculate the optimal ratio of the receiving coils(Rx) of loosely coupled transformer coil and the distance between the transmitting coil (Tx) and the receiving coil (Rx), That is, radius-center distance ratio γ , usually by system modeling to project the mutual inductance value between the Tx and the Rx and supplemented by a large number of experiments. It not only lack theoretical basis but also waste manpower and material resources in this way. Pointing to this problem, this paper proposes a design method, using by simulating and observing the change rules of current density, to obtain the optimal radius-center distance ratio γ . Firstly, the system decoupling equivalent circuit model, that primary and secondary coils are in parallel compensation (PP) structure of the single switch inverter ICPT system, is used to derive the relationship among the current density, mutual inductance (M), system transmission power. Through the formula analysis, the ratio of the Rx inductance (L1) to the Tx inductance (L2) and the value of the coupling coefficient λ of the system are determined, and to determine the values of L1 and L2 at different frequencies. The simulation model is established in this way and using the finite element simulation software to study the optimal value of γ . Compared with the method of optimizing the coil through the coil mutual inductance value, the current density in this paper can be directly observed by software, vivid, save time and cost, and improve the design efficiency effectively. The simulation results show that the optimal radius-center distance ratio (γ ) of loosely coupled coils is consistent with the empirical values summed up by the enterprise experiments.
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