This article proposes a three-phase six-switch switching-cell current source inverter (H6-SC-CSI) and a modified switching scheme of space vector pulsewidth modulation (SVPWM). Compared to the conventional three-phase six-switch current source inverter, the H6-SC-CSI has no open-circuit possibility, thus, the inverter reliability is greatly enhanced. In addition, the overlap-time can be minimized; hence, the output waveform quality can be considerably improved. Due to the presence of switching-cell capacitors, a conventional switching sequence of the SVPWM is modified for the inverter to operate properly. A 2.2 kW hardware prototype is built and tested to verify the effectiveness of the proposed PWM.

中文翻译：

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用于三相六开关开关单元电流源逆变器的改进型 SVPWM

本文提出了一种三相六开关开关单元电流源逆变器 (H6-SC-CSI) 和改进的空间矢量脉宽调制 (SVPWM) 开关方案。与传统的三相六开关电流源逆变器相比，H6-SC-CSI不存在开路的可能性，从而大大提高了逆变器的可靠性。此外，可以最小化重叠时间；因此，可以显着提高输出波形质量。由于开关单元电容器的存在，SVPWM 的传统开关顺序被修改以使逆变器正常工作。构建并测试了一个 2.2 kW 的硬件原型，以验证所提出的 PWM 的有效性。