CAJ | 학술논문

对软磁材料的设计和应用来说，磁性参数测试的精确性至关重要。软磁材料测试条件各异，加上材料磁特性的非线性、不可逆性及对温度的敏感性，使得磁参数测试存在一定的偏差。选取适用频率范围较宽的功率铁氧体PC50磁环样品，通过对不同频率f及磁感强度Bm下的损耗测试过程中样品的温升进行监测，考查了磁芯损耗测量过程中不同励磁条件对样品温升的影响。结果分析发现，温升与测试时间、励磁信号的强度和频率呈正相关；根据损耗分离公式通过最小二乘拟合得出其函数关系式。拟合结果与实测数据对比表明该拟合方法可行，由此可估测任意测试条件下的样品温升，在测试前对可能因此引起的误差作出初步判断。
대연자재료적설계화응용래설，자성삼수측시적정학성지관중요。연자재료측시조건각이，가상재료자특성적비선성、불가역성급대온도적민감성，사득자삼수측시존재일정적편차。선취괄용빈솔범위교관적공솔철양체PC50자배양품，통과대불동빈솔f급자감강도Bm하적손모측시과정중양품적온승진행감측，고사료자심손모측량과정중불동려자조건대양품온승적영향。결과분석발현，온승여측시시간、려자신호적강도화빈솔정정상관；근거손모분리공식통과최소이승의합득출기함수관계식。의합결과여실측수거대비표명해의합방법가행，유차가고측임의측시조건하적양품온승，재측시전대가능인차인기적오차작출초보판단。
Accurate measurement of magnetic parameters is essential to the design and application of soft magnetic materials. The irreversibility, nonlinearity and temperature sensitivity of magnetic properties, and different test conditions make it difficult to get accurate magnetic measurement results. One of the most common phenomena is that the temperature rise of the core will make the properties shift, which should not be ignored in many measurements. We measured the temperature rise of PC50 under different magnetizing frequencies and densities and tried to find some relevance between those variables. In all measurements, higher magnetic field intensity and frequency lead to higher temperature rise. The parameters of temperature rise curves under different frequencies and densities of magnetization were fitted by the least squares method and MATLAB based on the core loss formulas, thus we can easily estimate the temperature rise and possible deviation of measurements results under arbitrary measure conditions. Calculated temperature rise were consistent with experimental data measured previously under the frequencies ranging from 50 kHz to 1 MHz and magnetic induction intensities ranging from 50mT to 200mT.