论文标题
对双活动桥的动力学的见解
An Insight into the Dynamics of a Dual Active Bridge
论文作者
论文摘要
本文旨在分析双活动桥分离的双向DC-DC转换器（DAB）对完整DAB系统动力学的零动力学的影响。它还解释了其对DAB系统控制器设计的影响。在进行这些分析时，得出了DAB的状态空间模型以及模型的第一个谐波近似（FHA）。 ZVS和系统的稳定性分析是根据系统的FHA模型进行的。该系统对于整个功率范围的恒定输出电压操作显示稳定，而对于恒定功率负载（CPL）操作不稳定，负载需求接近系统最大功率。还表明，变压器绕组电流是零动态状态的一部分，无论系统的工作条件如何，始终是稳定的。
This paper aims at analyzing the effect of the zero dynamics of the Dual Active Bridge Isolated Bidirectional dc-dc converter (DAB) on the dynamics of the complete DAB system. It also explains its influence on controller design for the DAB system. In carrying out these analyses, the state space model of the DAB, as well as the first harmonic approximation (FHA) of the model are derived. The ZVS and the stability analysis of the system are undertaken based on the FHA model of the system. The system is shown to be stable for a constant output voltage operation for the entire power range while it is unstable for the constant power load (CPL) operation for load demands close to the system maximum power. It is also shown that the transformer winding currents are part of the zero dynamic states and are always stable regardless of the operating conditions of the system.
