一种多模态组合型 Y 源逆变器

Addressing the issues of insufficient boost capacity and high shoot-through current in coupled inductance impedance source inverters，this article introduces the multi-modal combination method into the Y-source impedance network and proposes an multi-modal combination Y-source inverter. A detailed analysis was conducted on the mode combination methods，corresponding modulation strategy，and voltage current relationship of the proposed inverter，and the boost ratio and key device stress were derived. The multi-modal combination method introduces a new influence factor into the boost ratio of the proposed inverter. Compared to improved Y-source inverter and high step-up Y-source inverter，it can achieve higher boost capability at the same winding coefficient K and direct duty cycle d. At the same time，it has lower diode voltage stress and suppresses the shoot-through current. Finally，the feasibility and superiority of the proposed inverter were verified by building a 200 W experimental platform.