This paper presents a deadbeat predictive direct power control (DB-DPC) scheme for a fast battery charger to improve its dynamic performance and stability. Recently, battery chargers have been adopting paralleled multi-leg converters based on silicon carbide (SiC) devices to increase power capacity, which reduces the charging duration. However, the inherent instability of the battery is regarded as a crucial issue during the fast charging process. Therefore, the proposed DB-DPC provides a stable steady state since it includes real-time estimation of the variable battery impedance. Furthermore, the DB-DPC effectively minimizes the rising and settling time, which demonstrates fast-dynamic response characteristics when compared to proportional–integral (PI) control. The control performance is verified by various simulation and experimental results.

中文翻译：

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基于交错降压转换器的电动汽车快速电池充电器的无差拍预测直接功率控制

本文提出了一种用于快速电池充电器的无差拍预测直接功率控制 (DB-DPC) 方案，以提高其动态性能和稳定性。最近，电池充电器一直采用基于碳化硅 (SiC) 器件的并联多腿转换器来增加功率容量，从而缩短充电时间。然而，电池固有的不稳定性被认为是快速充电过程中的一个关键问题。因此，所提出的 DB-DPC 提供了稳定的稳态，因为它包括对可变电池阻抗的实时估计。此外，DB-DPC 有效地最大限度地减少了上升和稳定时间，与比例积分 (PI) 控制相比，这表现出快速动态响应特性。通过各种模拟和实验结果验证了控制性能。