改进的软开关T型中性点紧 (T-NPC) 逆变器,部件数量减少
Mehmet Cihat Ozgenel1, Naim Suleyman Ting1, Yakup Sahin2
1Electrical Electronics Department, Erzincan Binali Yildirim University, Erzincan 24002, Turkey.
The Review of scientific instruments
|November 19, 2025
概括
这项研究引入了一种改进的软开关T型逆变器,配备了一种新型的snubber电池. 它实现了所有组件的完全软切换,提高了效率并减少了功率电子应用的复杂性.
科学领域:
- 电气工程 电气工程
- 电力电子 电力电子 电力电子
- 逆变器技术 逆变器技术
背景情况:
- 传统的T型中性点式逆变器往往遭受开关损失和复杂性.
- 在不增加组件数或压力的情况下,在所有设备上实现完整的软切换 (SS) 是具有挑战性的.
研究的目的:
- 介绍一个增强的软开关T型逆变器拓.
- 为了提高效率,减少组件数量,并保持所有活跃设备的完全软切换.
主要方法:
- 为T型逆变器开发一个紧的活跃的snubber单元.
- 与以前的设计相比,取消了四个辅助路径二极管.
- 运行模式和稳定状态条件的理论分析.
主要成果:
- 实现了主开关的零电压过渡开启和零电压开关 (ZVS) 关闭.
- 辅助开关实现了零电流开关打开和ZVS关闭.
- 在各种负载条件下表现出一致的SS,在1kW原型上达到97.2%的峰值效率.
结论:
- 拟议的逆变器拓提供结构简单性和成本效益.
- 它消除了反向回收损失,并简化了热管理.
- 改进的逆变器适用于可再生能源和电动驱动器中的高性能,紧的T型应用.
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