A three-winding coupled inductor connected as a Y-shaped impedance network has been used in dc–dc and dc–ac converters for producing a high voltage gain for renewable applications. Its versatility is further extended in this article by the proposed differential Y-source inverter with two Y-source networks. The proposed inverter is modulated by a half-sine wave, which permits only one coupled inductor and two power switches of a phase-leg to operate at a high switching frequency during each half-fundamental cycle. The outcome is significantly reduced switching losses for its semiconductors. As for leakage inductances due to imperfect coupling, their effects have been minimized by two lossless diodes, included to prevent abrupt dissipation of leakage energy. Instead, the leakage energy discharges and then recycles to the dc-link capacitors, which, in turn, help to clamp voltages across the power switches. Detailed analyses of the inverter are given in this article, supported by simulation and experimental results obtained with a 250-W prototype for boosting a 30-V dc input to a 110-V ac output.

中文翻译：

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单相高压增益差分Y源逆变器

dc-dc和dc-ac转换器中使用了一个Y形阻抗网络连接的三绕组耦合电感器，以产生可再生应用的高电压增益。本文提出的带有两个Y源网络的差分Y源逆变器进一步扩展了其多功能性。提出的逆变器由半正弦波调制，该半正弦波仅允许一个耦合电感和一个相脚的两个功率开关在每个半基本周期内以较高的开关频率工作。结果是大大减少了其半导体的开关损耗。至于由于耦合不良导致的漏感，通过两个无损二极管将其影响最小化，其中包括两个二极管，以防止泄漏能量的突然耗散。取而代之的是，泄漏的能量释放出来，然后循环到直流链电容器中，然后，反过来，有助于钳位电源开关上的电压。本文给出了逆变器的详细分析，并辅以使用250W原型将30V直流输入升压至110V交流输出所获得的仿真和实验结果。