新型软磁材料磁化电源的设计及实现

Design and Realization of Magnetized Power Supply of New Soft Magnetic Materials

为降低磁化电源对软磁材料动态磁参数测量的影响,提出一种基于现场可编程门阵列(FPGA)芯片的磁化电源设计方法.采用了坐标旋转数字算法理论(CORDIC算法)完成直接数字频率合成(DDS)模块的设计,并通过数模转换芯片完成数字波向模拟波的转换.实验结果表明:设计的磁化电源可以有效进行软磁材料的动态磁参数测量,并且利用其测量1J50和1J79这两种常用软磁材料样品的动态磁参数的测试结果的平均相对误差分别为1.69%和2.24%,明显小于所选取的对比磁化电源XD22A的测量误差.

In order to reduce the effect of magnetized power supply on dynamic magnetic parameters measurement of soft magnetic materials,a design method of magnetic power supply based on FPGA is put forward.The use of cordic algorithm is to complete the design of DDS module,and the digital analog conversion chip is used to achieve digital wave to analog wave conversion.The results of experiments show that the designed magnetizing power supply effectively measures the dynamic parameters of soft magnetic materials,and the average relative errors of the dynamic magnetic parameters of the two commonly used soft magnetic material samples of 1J50 and 1J79 are 1.69%and 2.24%,respectively,which are significantly smaller than the measured errors of the selected magnetizing power supply XD22A.