Using silicon carbide (SiC) power devices can potentially improve the efficiency of a power electronic system, but it may also introduce severe electromagnetic interference (EMI) problems due to the fast switching speed. The conventional gate driver cannot provide the flexibility to adjust the switching speed of SiC dynamically. To address this issue, an intelligent versatile active gate driver (AGD) is proposed to achieve optimized switching trajectory for power devices. The proposed AGD has five operation modes, i.e., faster/normal/slower the turn-on process and slower/normal turn-off process. The availability of multiple operation modes offers extra freedom to improve the switching performance and enable it to be versatile across various systems. The proposed AGD can provide more switching speed adjustment resolution than the other AGDs allowing for fine tuning of the switching speed of SiC power devices. In addition, a novel modelbased trajectory optimization strategy is proposed to determine the optimal gate driver output voltage by trading the EMI noise against the switching energy losses. The functionalities of the multi-level AGD are validated with the experimental results. The hardware design consideration is also given for the product commercialization purpose.

中文翻译：

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基于智能模型的轨迹优化有源栅极驱动器，用于碳化硅设备

使用碳化硅（SiC）功率器件可以潜在地提高功率电子系统的效率，但是由于开关速度快，它还会带来严重的电磁干扰（EMI）问题。传统的栅极驱动器不能提供动态调整SiC开关速度的灵活性。为了解决这个问题，提出了一种智能通用有源栅极驱动器（AGD），以实现功率器件的优化开关轨迹。所提出的AGD具有五个操作模式，即更快/正常/较慢的接通过程和较慢/正常的关断过程。多种操作模式的可用性提供了额外的自由度，以改善开关性能并使之在各种系统中通用。所提出的AGD可以提供比其他AGD更高的开关速度调整分辨率，从而可以对SiC功率器件的开关速度进行微调。此外，提出了一种基于模型的新型轨迹优化策略，以通过将EMI噪声与开关能量损耗进行权衡来确定最佳的栅极驱动器输出电压。实验结果验证了多层AGD的功能。出于产品商业化的目的，也给出了硬件设计考虑。实验结果验证了多层AGD的功能。出于产品商业化的目的，也给出了硬件设计考虑。实验结果验证了多层AGD的功能。出于产品商业化的目的，也给出了硬件设计考虑。