Selecting a Distributed Air-Gap Powder Core For Flyback Transformers

• 作者: Magnetics
• 来源期刊: 电源世界
• 学科: 工学
• 关键词: 磁性材料 变压器 母城 电感 电源 世界
• 年，卷（期）: 2002,（9）
• 页码范围: 27-28
• 页数: 2页
• 分类号: TM46

摘要

1 IntroductionFlyback converters are based on the storage of energy in an inductorduring the "on" charging time period t_on, and discharge of thisenergy to the load during the "off" time period, t_off, as shown inFigure 1. The operation is unipolar and utilizes the first quadrant of the B-Hcurve of a magnetic core （Figure 2）. The usable flux density is△B. The ideal core material should have a maximum available △Band low core losses （proportional to the shaded area）.For flyback transformers, Magnetics offers: