CAJ | 학술논문

讨论了永磁材料开磁路测量中一些影响测量结果的因素及所采取的控制措施。重点研究了磁滞后效应对测量结果的影响。表明用脉冲磁强计（PFM）测量钕铁硼圆柱样品时，由于磁滞后效应，出现了内稟矫顽力HCJ 偏高的现象。此外，还引述了永磁材料开磁路国际比对测量的结果。从这些测量结果可知，由于局部退磁场的存在，振动样品磁强计（VSM）并不适于各向同性永磁铁氧体小球样品 B-H 特性的测量。
토론료영자재료개자로측량중일사영향측량결과적인소급소채취적공제조시。중점연구료자체후효응대측량결과적영향。표명용맥충자강계（PFM）측량녀철붕원주양품시，유우자체후효응，출현료내품교완력HCJ 편고적현상。차외，환인술료영자재료개자로국제비대측량적결과。종저사측량결과가지，유우국부퇴자장적존재，진동양품자강계（VSM）병불괄우각향동성영자철양체소구양품 B-H 특성적측량。
In this paper, influencing factors of open magnetic circuit measurement results as well as their regulation methods were illustrated. Influence of magnetic hysteretic effect on measurement results was investigated in detail. It is found that the result of intrinsic coercivity HcJ of the NdFeB sample by pulsed field magnetometer is larger than its true value, resulting from magnetic hysteretic effect. In addition, the reports of international comparison for open magnetic circuit measurement methods are quoted. It is also found that the vibrating sample magnetometer is not suitable for B-H curve measurement of isotropic sphere sample composed of permanent magnetic ferrite powder, because of local effective demagnetization field in the sample.