- 积分
- 1320
- 在线时间
- 2385 小时
- 最后登录
- 2021-1-1
- 阅读权限
- 70
- 精华
- 0
 
- UID
- 288871
- 帖子
- 1106
- 精华
- 0
- 经验
- 1320 点
- 金钱
- 1111 ¥
- 注册时间
- 2011-2-3
|
本帖最后由 doctorqianbing 于 2011-11-30 01:44 编辑
来一个老外的这种绕法
附上一段原文
Pi windings
The Greek letter Π is the symbol for transformer windings that are rotated 90deg in a bobbin. Π windings are sandwich assembled. The below pic is an experimental valve amp with Pi wound output trannys. The final design had 8 Primaries sandwiched between 9 Secondaries. Pi wound trannys are 100% symmetrically balanced and have a high frequency response x 2 greater than a conventional layer wound output tranny.
Pi winding is commonly used in ferrite core trannys that transfer energy at very high frequencies, as seen in switch mode power supplies and Rf amplifiers. Pi winding is also the perfect method to construct an audio output tranny. Pi winding output trannys are not known to have been used in audio valve amps. A possible reason is the high tooling and assembly costs. Also, the marketing of audiophile products, particularly tube amps, is driven by brand names, romantic nostalgia and reviews, not by engineering or performance |
|