This article proposed a systematic approach for the control of three-phase bidirectional zero-voltage switching (ZVS) converters. Combining the adaptive hysteresis-band current control and turn-on delay modifications, ZVS conditions are realized in full line-cycle in all loading conditions like active power, reactive power, light load, and heavy load. The soft-switching resonant period is carefully analyzed, and the current band is designed accordingly, which minimized the additional conduction loss. Meanwhile, a zero-sequence voltage injection control is included in the approach, which compensates the voltage gain by 15% and narrows down the switching frequency variation range. The hardware design approach is also provided including the LCL filter design and a low-cost high-bandwidth high-accuracy current sensor design. A highly integrated 5-kW silicon carbide implemented three-phase ZVS converter prototype with printed circuit board integrated inductors and customized current sensors is designed. All the control is implemented in a single microcontroller unit, which achieves a high electromagnetic compatibility. The designed prototype achieves a total power density of 5.5 kW/L and a peak efficiency of 98.5%. All the analysis and the proposed control approach are experimentally verified on the designed prototype.

中文翻译：

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用于高频三相转换器的基于自适应滞后电流的 ZVS 调制和电压增益补偿

本文提出了一种控制三相双向零电压开关 (ZVS) 转换器的系统方法。结合自适应迟滞带电流控制和开启延迟修改，ZVS 条件在所有负载条件（如有功功率、无功功率、轻载和重载）中以全线周期实现。仔细分析了软开关谐振周期，并相应地设计了电流带，最大限度地减少了额外的传导损耗。同时，该方法包含零序电压注入控制，补偿电压增益15%，缩小开关频率变化范围。还提供了硬件设计方法，包括 LCL 滤波器设计和低成本高带宽高精度电流传感器设计。设计了一个高度集成的 5 kW 碳化硅实现的三相 ZVS 转换器原型，带有印刷电路板集成电感器和定制的电流传感器。所有控制都在单个微控制器单元中实现，从而实现了高电磁兼容性。设计的原型实现了 5.5 kW/L 的总功率密度和 98.5% 的峰值效率。所有的分析和提出的控制方法都在设计的原型上进行了实验验证。5 kW/L 和 98.5% 的峰值效率。所有的分析和提出的控制方法都在设计的原型上进行了实验验证。5 kW/L 和 98.5% 的峰值效率。所有的分析和提出的控制方法都在设计的原型上进行了实验验证。