电工钢片二维磁特性测量的关键问题

Key issues of two-dimensional magnetic property measurement for electrical steel sheet

传统的主磁路电工钢片(也称硅钢片)的磁特性只能由沿轧制与垂直于轧制两个方向来表述,针对该问题提出一种电工钢片的二维磁特性测量方法.通过在样片区域构建旋转磁场,使被测样片中磁感应强度方向与样片的轧制方向成任意角度.在模型设计上采用两条相互垂直的磁路,每条磁路可以在样片中产生频率、幅值相等且相位相差为90°的正弦波磁感应强度分量.讨论了测量过程中功率放大器的设计、LabVIEW运算中的积分漂移、Queue结构以及磁通波形的控制等关键性问题.实验证明,所提出的解决方案是有效的,具有可行性.

It is not enough to express the magnetic properties of electrical steel sheet along rolling direction and vertical direction. Thus, it is necessary to research the two-dimension magnetic properties with considering the anisotropy at any direction. The measuring method for two-dimension magnetic properties of electrical steel sheet was presented, the measuring model and system structure were described. And then, some key topics including the design of power amplifier during measuring, the integral drift and Queue configuration in the computation of LabVIEW as well as the control of flux waveform were discussed. The effectivity and feasibility of the proposed method has been proved by testing.