基于AP法选择高频变压器磁心的公式推导及验证  

Derivation and Validation of Formula to Select the High-Frequency Transformer Magnetic Core Based on AP Method

作　　者：沙占友 马洪涛[1] 

机构地区：[1]河北科技大学,河北石家庄050054

出　　处：《电源技术应用》2011年第11期9-13,共5页Power Supply Technologles and Applications

摘　　要：目前AP法(即面积乘积法)仍被推荐为选择磁心的一种有效方法,但AP法原本是针对传统的工频正弦波铁心变压器而提出的,直接用于波形复杂的高频变压器并不合适,计算结果也很不准确。本文基于电子测量领域定义的波形因数(k_e)、开关电源特有的脉动系数(K_(RP))、占空比(D)等概念及工作波形,对AP法计算公式做了严密推导及验证,为正确选择高频变压器的磁心提供了一种科学、实用的方法。P method(i.e.,the product of area method) is still recommended as an effective way to select the magnetic core,but it was originally presented for traditional sine-wave frequency iron core transformers and thus the direct application of this method to complex high-frequency transformers is not appropriate,leading to inaccurate calculated results.Based on the waveform factor(k_f) defined in the field of electronic measurement, the unique switching power supply ripple factor(K_(RP)),the concepts of the duty cycle(D),etc.and waveforms, AP formula derivation and validation are carried out carefully,which provides a scientific,practical approach for correct selection of the high-frequency transformer magnetic cores.

关 键 词：高频变压器 磁心 面积乘积 波形因数 脉动系数 

分 类 号：TM433[电气工程—电器]