超高矫顽力永磁体性能测试装置研究  

Research on performance testing apparatus for ultra-high coercivity permanent magnets

作　　者：范维 王军[2] 黄可可 Fan Wei;Wang Jun;Huang Keke(Shanghai Sanda University,Shanghai 201209,China;China Mining University,Xuzhou 221116,China;Ningbo Xinglong Magnetic Technology Co.,Ltd.,Ningbo 315137,China)

机构地区：[1]上海杉达学院,上海201209 [2]中国矿业大学,徐州221116 [3]宁波兴隆磁性技术有限公司,宁波315137

出　　处：《分析仪器》2025年第2期14-18,共5页Analytical Instrumentation

基　　金：2022年度浙江省博士后科研基金《永磁体超高矫顽力性能测试方法研究》,基金代号ZJ2022126,博士后编号312801。

摘　　要：针对矫顽力超过4000KA/m的永磁体测试需求,研究基于开放式脉冲磁场发生与高速数据采集的集成化测试技术与装置,通过空心脉冲电流实现最高4800KA/m的脉冲磁场,采用ADS8688A芯片与树莓派计算平台构建数据采集系统,开发动态信号过滤算法抵消电涡流效应对测试数据的影响,提升高频采样的UI绘制效率。实验测试结果表明,本测试设备对于永磁体在充、退磁过程中磁场信号的变化捕捉正确,采样频率可达到2M,波形相关系数达0.997,信号真实度高,完成了该设备的核心功能指标要求。This paper presents a study on the testing requirements for permanent magnets with coercivity exceeding 4000KA/m.An integrated testing technology and apparatus based on open-type pulsed magnetic field generation and high-speed data acquisition are developed.The apparatus can achieve a pulsed magnetic field of up to 4800KA/m using hollow pulsed currents.A data acquisition system is constructed using the ADS8688A chip and the Raspberry Pi computing platform.A dynamic signal filtering algorithm has been developed to eliminate the influence of eddy currents on the test data and to improve the UI rendering efficiency of high-frequency sampling.Experimental results demonstrate that the developed testing device can accurately capture the changes in magnetic field signals during the magnetization and demagnetization processes of permanent magnets,with high signal fidelity,thus fulfilling the core functional requirements of the device.

关 键 词：永磁材料 超高矫顽力 脉冲磁场 SPI通信 动态采样 

分 类 号：TM273[一般工业技术—材料科学与工程]