Measurement and loss model of ferrites with non-sinusoidal waveforms
Measurement and loss model of ferrites with non-sinusoidal waveforms
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DOI：
10.1109/pesc.2004.1354851
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发表时间：
2004-06
期刊：
影响因子：
--
通讯作者：
Alex Van Den Bossche;Vencislav Cekov;Vaichev Georgi;Bogomilov Georgiev;Sint-Pietersnieuwstraat;Studentska Str
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文献类型：
--
作者：
Alex Van Den Bossche;Vencislav Cekov;Vaichev Georgi;Bogomilov Georgiev;Sint-Pietersnieuwstraat;Studentska Str
尽管在电力电子的典型应用中电压类似于方波，但商业铁氧体等级的通常数据是针对正弦波形给出的。首先，提出了一种精确的双线示波器功率测量方法。设计了特殊的宽频率电流和电压传感器，具有高达50 MHz的非常低的相位差。其次，提出了一种铁氧体损耗模型--自然斯坦梅茨延伸（NSE）模型。该模型是检查两个不同的铁氧体等级的测量，与占空比变化很大的方波。将该模型与修正的Steinmetz方程（MSE）进行了比较。这两种方法具有不同的数学公式，给出了可比较但不同的结果。
The usual data of commercial ferrite grades are given for sinusoidal waveforms, although the voltage in the typical applications in power electronics resembles to square waves. Firstly, an accurate two wire, oscilloscope power measurement is presented. Special wide frequency current and voltage transducers were designed, with a very low phase difference up to 50 MHz. Secondly, a ferrite loss model named natural Steinmetz extension (NSE) is presented. The model is checked with measurements on two different ferrite grades, with square waves with a large variation in duty ratio. The proposed model is compared with modified Steinmetz equation (MSE). The two methods with a different mathematical formulation give comparable but different results.