High Frequency and Sensitivity Magnetic Core With Amorphous HB1-M Operate at Electromagnetic Interface Characteristic

This paper presents the EMI impact on the current transformer with amorphous HB1-M core, printed circuit board (PCB) power transformer and the filter of inductor for Internet of Things (IoTs) device. According to the antenna principle, the radiation emission power responses of PCB transformer and current transformer are estimated and found to be negligible due to the EMI experimental report. The current transformer with amorphous HB1-M core is annealed at 350 °C and soaks for 1.5 h. The simulation results of electromagnetic field is to display the power electronic circuit shield response, which also presented resistance EMI signal for power inductor in magnetic flux density and electric potential. According to the major radiated EMI source in the frequency range between of 50 MHz to 400 MHz is found to be the filter of the power circuit, where antenna emission energy transients occur, rather than the PCB transformer. Experimental results have confirmed that the application of PCB transformer in electronic circuit might not be have seriously EMI problem on the power electronic circuit.