A conventional two-stage topology that consists of a dc/ac converter, a dc-link, and two ac/dc converter is being used as wireless charging of electric vehicles (EVs). However, the conventional topology contains more conversion stages with a bulky dc-link capacitor, and implementation of control strategies is not easy to transfer power from the primary coil to pickup coil or vice versa. A single-stage, inductive power transfer (IPT) system with a simple control strategy is needed to reduce the conversion stages and to increase the reliability of the system. This article proposes a control strategy for a single-stage conversion topology that is easy to implement and more importantly can achieve unity power factor (UPF) using a single controller. The experimental validation of single-stage conversion topology and steady-state analysis with series–series (SS) compensation scheme is presented in this article. A fixed angle of ±90° in between the output phase of the converters is achieved without estimating any power or current parameters. A hardware prototype working at a lower watt rating is analyzed, and the validation of the proposed system for 3.7-kVA rating as per the international standard is simulated. Furthermore, transient response is also observed to verify the closed-loop control scheme of battery current.

中文翻译：

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具有闭环电流控制策略的单级双向感应电能传输系统

由直流/交流转换器、直流链路和两个交流/直流转换器组成的传统两级拓扑被用作电动汽车 (EV) 的无线充电。然而，传统拓扑包含更多转换级和庞大的直流链路电容器，并且控制策略的实施不容易将功率从初级线圈传输到拾波线圈，反之亦然。需要具有简单控制策略的单级感应功率传输 (IPT) 系统来减少转换级并提高系统的可靠性。本文提出了一种易于实现且更重要的是可以使用单个控制器实现单位功率因数 (UPF) 的单级转换拓扑的控制策略。本文介绍了单级转换拓扑的实验验证和具有串串联 (SS) 补偿方案的稳态分析。无需估计任何功率或电流参数即可实现转换器输出相位之间 ±90° 的固定角度。分析了在较低额定功率下工作的硬件原型，并模拟了根据国际标准对 3.7-kVA 额定值建议系统的验证。此外，还观察到瞬态响应以验证电池电流的闭环控制方案。并模拟了根据国际标准对 3.7-kVA 额定值建议系统的验证。此外，还观察到瞬态响应以验证电池电流的闭环控制方案。并模拟了根据国际标准对 3.7-kVA 额定值建议系统的验证。此外，还观察到瞬态响应以验证电池电流的闭环控制方案。