Modeling Method of Stray Magnetic Couplings in an EMC Filter for Power Electronic Devices

Abstract

This paper proposes a remarkably efficient modeling method of stray magnetic couplings in an Electromagnetic Compatibility (EMC) filter that focuses on the dominant magnetic field in a power electronic device. The proposed modeling method was applied for simulating the filter performance of an EMC filter for a Silicon Carbide (SiC) solar inverter, and its effectiveness was verified through a comparison of the measurement and simulation results. With the proposed modeling method, the influence of the stray magnetic couplings on the filter performance can be predicted well. Further, the results matched those of the measurement and simulation with a conventional modeling method. Accordingly, the number of stray magnetic couplings required for accurate prediction can be dramatically reduced from 325 to just one.

Systematization of a Multilevel-Topology-Based Linear Amplifier Family for Noiseless DC–AC Power Conversion

“…Output waveforms with pulse width modulation (PWM) are sometimes filtered by passive LC components and such power conversion circuits are called a class-D amplifier. However, the switching operation inherently produces harmonics and EMI noise [1]- [3]. For example, these harmful sub-products sometimes cause a failure of winding insulations and leak current in motor drive applications [4]- [6].…”