To realize a three-phase soft-switching inverter with a simple structure, low cost, and easy modularization, this paper proposes a novel three-phase passive soft-switching inverter, which realizes soft-switching of the switches in the inverter through energy consumption of the auxiliary snubber circuit. When compared with the traditional passive soft-switching inverter, it avoids the use of transformers, coupled inductors, and bulk electrolyte capacitors. Thus, it has a small size, a high power density, and is suitable for integration. Its three single phases are independent of each other, which makes it easy for the inverter to apply various control strategies. This study chooses a single-phase circuit, and investigates the operating principle, soft-switching implementation characteristics, and parameter design methods of the novel passive soft-switching inverter under various operation modes. Finally, a 10 kW/16 kHz prototype is made using an IGBT as a switch, and experiments are conducted to confirm the validity of the inverter.

为实现结构简单、成本低、易于模块化的三相软开关逆变器，提出一种新型三相无源软开关逆变器，通过能耗实现逆变器中开关的软开关。的辅助缓冲电路。与传统的无源软开关逆变器相比，它避免了使用变压器、耦合电感和大容量电解电容。因此，它体积​​小，功率密度高，适合集成。其三个单相相互独立，便于逆变器应用各种控制策略。本研究选用单相电路，考察其工作原理、软开关实现特性、新型无源软开关逆变器在各种工作模式下的参数设计方法。最后，利用IGBT作为开关制作了10kW/16kHz的样机，并进行了实验验证逆变器的有效性。