Inverter EMI modeling and simulation methodologies

Lai, Jih‐Sheng; Huang, Xudong; Pepa, E.; Chen, Shaotang; Nehl, T. W.

doi:10.1109/iecon.2003.1280285

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…8 with reasonable accuracy it can therefore be used to analyze the EMI behavior of the modules in more detail. The inability of the simulation model to predict exact magnitudes can be attributed to using linear, lumped circuit elements to model parasitics inside the converter and the module, and to the die model used not being accurate at high frequencies [36]- [38].…”

Section: A Ltspice Simulation Modelmentioning

confidence: 99%

EMI Mitigation for SiC MOSFET Power Modules Using Integrated Common-Mode Screen

Moaz,

Rajagopal,

DiMarino

et al. 2023

IEEE Open J. Power Electron.

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Electromagnetic interference (EMI) remains a critical roadblock to fully benefitting from the various advantages provided by wide-bandgap devices. Of particular concern is the common-mode (CM) emissions generated during the device operation. This work aims to inform EMI mitigation strategies that can be implemented at the power module design stage and that can result in modules with lower noise emissions in the conducted EMI frequency range. Four 1.2 kV SiC MOSFET power modules are fabricated with different architectures found from literature to better understand their impact on EMI mitigation and to identify trade-offs. Module architectures with integrated CM screens connected to two different DC nodes are experimentally tested and an in-depth analysis on the EMI results is presented. Experimental results show that using a CM screen connected to the DC-link midpoint allows for up to 26 dB of CM current reduction at the baseplate of the module and the input of the converter. Furthermore, this integrated CM screen configuration enables a 0.5% increase in efficiency.

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Section: A Ltspice Simulation Modelmentioning

confidence: 99%

EMI Mitigation for SiC MOSFET Power Modules Using Integrated Common-Mode Screen

Moaz,

Rajagopal,

DiMarino

et al. 2023

IEEE Open J. Power Electron.

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A Modified Equivalent Circuit for Common-Mode Current of Single-Phase Full-Bridge Inverters

Zhang

Zhou

Zhang

et al. 2006

IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics

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A modified equivalent circuit for common-mode (CM) current of single-phase full-bridge inverters is proposed. The circuit allows application of superposition theorem, and it provides more insights into the propagation mechanism of the CM noise. Simulations and experiments are conducted on an inverter test setup to validate the proposed circuit. Three operation conditions are studied: (1) with one of the two legs detached from the dc bus; (2) with that leg installed back in place but not switching; (3) with normal unipolar PWM switching of both the two legs. Based on the proposed equivalent circuit and measured parameters from the test setup, simulations with MATLAB software predicted the CM current both in time and frequency domains with reasonable precision.

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