Some popular applications of wireless power transfer (such as electric vehicle charging) include a transmitter residing on a static platform (charging station) and a dynamic receiver (vehicle). In such applications, compensation may be excluded from the receiver in order to minimize, simplify and lower the cost. If transmitter compensation is also maximally simplified series to none (SN) compensation topology is created. It was recently shown that classical first harmonic approximation (FHA) based analysis fails to accurately predict RMS values of system currents, thus overestimating the achievable coil-to-coil efficiency. Consequently, this paper establishes modified FHA (MFHA) equivalent circuit of SN-compensated inductive power transfer link (IPTL), utilizing analytical expressions of primary and secondary currents based on time-domain differential equations (DE) based solution. It is shown that the outcomes of proposed MFHA and DE methods are very close, justifying the proposed methodology. Simulations and experiments demonstrate excellent matching, validating the presented analysis.

无线电力传输（例如电动汽车充电）的一些流行应用包括驻留在静态平台（充电站）上的发射器和动态接收器（车辆）。在这样的应用中，可以从接收器中排除补偿，以最小化，简化并降低成本。如果也最大程度地简化了发射器补偿，则将创建无序列号（SN）补偿拓扑。最近发现，基于经典的一次谐波近似（FHA）的分析无法准确预测系统电流的RMS值，因此高估了可达到的线圈到线圈效率。因此，本文建立了经SN补偿的感应式电力传输链路（IPTL）的改进型FHA（MFHA）等效电路，利用基于时域微分方程（DE）的解决方案，一次和二次电流的解析表达式。结果表明，所提出的MFHA和DE方法的结果非常接近，证明了所提出的方法的合理性。仿真和实验证明了出色的匹配性，验证了所提出的分析。