High-Frequency Link Inverter for Fuel Cells Based on Multiple-Carrier PWM

• 来源期刊: 变频器世界
• 学科: 工学
• 关键词: PWM PEM 变频器 产品质量
• 年，卷（期）: bpqsj_2004,（11）
• 页码范围: 29-32
• 页数: 4页
• 分类号: TN773

摘要

HIGH-FREQUENCY (I-IF) ac link inverter topologies, with or without soft switching, have important practical advantages compared to more conventional dc link inverters in terms of isolation, size of magnetics, and other properties. It is possible to obtain these basic advantages directly in a conventional PWM inverter with trans former-coupled output, but only if the transformer can handle the low modulating frequency. HF link topologies have not been common for medium power (1 to 20kW), largely because of the number of power stages and control complexity.