Bidirectional inductive power transfer (BIPT) systems are of particular interest for electrical vehicles for their enabling power to exchange between grid and vehicle. In BIPT systems, it is critical to keep the voltage phasors of the primary-side and secondary-side converters synchronized to regulate the power flow. In this article, the basic operation and steady-state characteristics of the BIPT system are introduced. A phase synchronization method for BIPT systems, which does not require any communication between primary- and secondary-side controllers or complicated hardware, is proposed in this article. To assist the design of the synchronization controller, the large-signal model and small-signal model of the BIPT system are derived. Based on the derived model of the system, the controller design for the phase synchronization method is proposed, considering the coupling between the synchronization controller and the BIPT main circuit and the clock frequency deviation between the primary-side and secondary-side controllers. The parameter sensitivity of the proposed method is analyzed. The large-signal and small-signal models are verified through simulations. And the experimental verification of the phase synchronization method shows that the BIPT system with the proposed phase synchronization method has a fast transient response as well as a stable steady-state performance.

中文翻译：

---

双向感应电能传输的数字相位同步方法


双向感应电力传输 (BIPT) 系统因其能够在电网和车辆之间交换电力而受到电动汽车的特别关注。在 BIPT 系统中，保持初级侧和次级侧转换器的电压相量同步以调节功率流至关重要。本文介绍了BIPT系统的基本运行和稳态特性。本文提出了一种用于 BIPT 系统的相位同步方法，该方法不需要初级侧和次级侧控制器之间的任何通信或复杂的硬件。为了辅助同步控制器的设计，推导了BIPT系统的大信号模型和小信号模型。基于系统推导模型，考虑同步控制器与BIPT主电路之间的耦合以及原副边控制器之间的时钟频率偏差，提出了相位同步法的控制器设计。分析了该方法的参数敏感性。通过仿真验证了大信号和小信号模型。相位同步方法的实验验证表明，采用该相位同步方法的BIPT系统具有快速的瞬态响应和稳定的稳态性能。