Metal lead frame components of linear Hall magnetic sensing chip working in detected magnetic field have magnetic accumulation effect and eddy current effect,which can interfere with the magnetic filed to be tested and make magnetic field strength shift the true value,resulting in a decrease in detection accuracy.After simulation analysis on metal frames containing magnetic components and frames with different structural sizes,it is concluded that non-magnetic component materials and small size sturcture design can improve interference of metal frame with detected magnetic field,the construction scheme of small-sized structural frames is analyzed.Finally,the linear Hall magnetic sensing chip is prepared and tested using the autonomous built environment,bandwidth of 354.8 kHz is obtained.
关键词
电磁学/引线框架/磁场仿真/涡流效应
Key words
electro-magnetism/lead frame/magnetic field simulation/eddy current effect
维普
万方数据