Research on Quantization of Core Losses of High and Low frequency Composite Excitation
Aiming at the problem that it is difficult to accurately measure and model the core losses of high and low frequency composite excitation,based on the detailed analysis of the limitations of the existing core losses measurement methods and core losses models,a core losses measurement system of high and low frequency composite excitation is built based on DC power method in this paper.The measurement accuracy is verified with the air-core inductor whose loss can be accurately measured.Finally,the core losses model of high and low frequency composite excitation is proposed based on the core losses model of PWM wave excitation under DC bias,and the experimental results show that the maximum relative error is-8.83%,which has high accuracy.
core losseshigh and low frequency composite excitationDC power methodmagnetic hysteresis loopmodel