Separation of Radiated EMI Noise based on Joint Approximate Diagonalization Algorithm

摘要

Power electronic devices and electricalequipment produce a large quantity of radiatedelectromagnetic interference (EMI) in the workingprocess. Electromagnetic field analysis method of thenear-field and far-field of the antenna can be employedto separate the radiated interference noises. However, themethod has low separation accuracy and requires a lotof time. A novel method based on joint approximatediagonalization algorithm (JADA) to separate theradiated EMI noise is proposed in this paper. Comparedwith the traditional independent component algorithmmethod, the accuracy is improved by 14% and theefficiency is increased by 30%. The common-differentialmode mixed noise source is taken as the experimentalobject to demonstrate the effectiveness and simplicity ofthe proposed method.