论文部分内容阅读
磁性材料在交流磁場作用下的特性比起直流特性要复杂得多,这是由于渦流和磁粘滞性的加入而造成的。在交流情况下的特点是用各种方法測得的磁性参数都不再象直流情况下那样仅仅取决于被测材料本身的磁性,而与材料的厚度、由該材料构成的試样尺寸以及测量时所用的頻率等因素有关。当试样被磁化到磁感B——磁場H关系的非线性区域时,B或H的波形还将影响測量結果。变流情况下的另一特点是表征試样特性的参数繁多,并且即使是对同一参数的测量,也可以采用不同的方法,这就使得材料的研制者和使用者不得不正視这样
Magnetic properties of the AC magnetic field than the DC characteristics to be much more complex, which is due to the eddy current and magnetic viscosity caused by the addition. The characteristic in the case of communication is that the magnetic parameters measured by various methods no longer depend on the magnetic properties of the material under test alone as it would be in the case of direct current but not on the thickness of the material, the dimensions of the specimen consisting of the material, When used by the frequency and other factors. When the sample is magnetized to a non-linear region of magnetic B-magnetic H, the waveform of B or H will also affect the measurement. Another feature of the converter case is that there are a large number of parameters characterizing the characteristics of the sample and different methods can be used even for the same parameter measurement, which makes the researchers and users of materials have to face it