Finite element analysis for power electronics EMC applications

Abstract

A CAD system for the analysis of power electronic circuits for EMC applications is being developed. The system is based on 3-dimensional finite-element electromagnetic field computations, with the source currents or voltages extracted either from measurements or from standard circuit analysis.The finite-element solver for this application is configured in terms of magnetic vector potential ( A J and modified electric scalar potential (VI), incorporating, unusually, the Coulomb gauge V.&=O.Comparisons of computed electromagnetic fields with measurements of fields emitted from a 600V, 300A IGBT switching circuit are reported. Agreement in magnetic field strength is fair (within SdBpAlm) at the low frequencies (lOkHz-2OkHz) considered for this paper.

Physics-Based Modeling of Power Converters From Finite Element Electromagnetic Field Computations

“…The electrostatic energy is calculated by (7) where is the electric displacement current, and is the electric field inside the model. Self and mutual capacitances are calculated based on the electrostatic energy value as (8) The resistance matrix inside the model is calculated based on the current density in the model conductors as (9). The resistance between different layers of the model is calculated by…”

“…In the case of using numerical and mathematical approaches, a methodology to obtain the system's HF parameters is through using finite element analysis (FEA). Applications of FEA in power electronics and drive systems are discussed in [3]- [8]. This methodology is privileged over the LCR meter measurements, because it: 1) takes into account different geometric configurations of the system components; and 2) eliminates costly and complicated procedures of testing the system's components and measurement [3].…”

Improvement of Electromagnetic Compatibility of Motor Drives Using Chaotic PWM

“…This trend inevitably contributes to an increasing level of electromagnetic interference (EMI). It leads to degrade the electromagnetic compatibility (EMC) for electronic devices [1]. Consequently, EMC legislation is increasingly stringent in many countries.…”

Development of Physics-based Models and Design Optimization of Power Electronic Conversion Systems

“…The HF model of different types of motor-drives for the investigation and prediction of EMI were discussed in [84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99][100][101]. In [84][85][86][87][88][89][90][91][92][93], analytical and numerical approaches were presented which proposes a simulation model for a complete drive system based on the frequency domain. References [94-101] present ideas to develop HF model for motor drive system based on the circuit measurements.…”

“…In the case of using numerical and mathematical approaches, a methodology to obtain the system's high frequency parameters is through using Finite Element Analysis (FEA). Application of FEA in power electronics and drive systems was discussed in [85][86][87][88][89][90]. This methodology is privileged over the LCR meter measures because: 1) take into account different geometric configurations of system components and 2) eliminate costly and complicated procedures of testing the system's components and measurement [85].…”