The silicon carbide (SiC) devices have attracted more and more attention due to the capability of withstanding higher blocking voltage, higher switching frequency, and higher temperature. However, challenges for SiC devices applied in voltage-source-inverter fed motor drives such as electromagnetic interference (EMI) issues and limited over-current capability still limit the further application of SiC devices. In this article, a novel SiC devices based zero-voltage-switching (ZVS) current-source-inverter (CSI) is proposed for permanent-magnet synchronous motor (PMSM) drive. The key is to propose an auxiliary resonant circuit, which achieves ZVS conditions for all switches in power circuits and reduces the dv/dt of high speed SiC devices. The resonant capacitor in the auxiliary circuit can clamp overvoltage caused by possible open-circuit faults. To further reduce the EMI, the random switching frequency pulsewidth modulation is designed for the proposed CSI motor drive. The system configuration, working principle, circuit design, and control schemes are described in detail. Both simulations and experiments are presented to verify the effectiveness of the proposed ZVS-CSI fed PMSM drive system.

中文翻译：

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具有降低 EMI 的零电压开关电流源逆变器馈电 PMSM 驱动

碳化硅 (SiC) 器件由于能够承受更高的阻断电压、更高的开关频率和更高的温度而受到越来越多的关注。然而，应用于电压源逆变器馈电电机驱动的 SiC 器件面临的挑战，例如电磁干扰 (EMI) 问题和有限的过流能力，仍然限制了 SiC 器件的进一步应用。在本文中，提出了一种基于零电压开关 (ZVS) 电流源逆变器 (CSI) 的新型 SiC 器件，用于永磁同步电机 (PMSM) 驱动。关键是提出一个辅助谐振电路，实现电源电路中所有开关的ZVS条件，降低高速SiC器件的dv/dt。辅助电路中的谐振电容器可以钳位可能的开路故障引起的过电压。为了进一步降低 EMI，随机开关频率脉宽调制被设计用于建议的 CSI 电机驱动。详细介绍了系统配置、工作原理、电路设计和控制方案。提供了模拟和实验来验证所提出的 ZVS-CSI 馈电 PMSM 驱动系统的有效性。