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Article Dans Une Revue IEEE Transactions on Power Electronics Année : 2022

EMI Mitigation of GaN Power Inverter Leg by Local Shielding Techniques

Résumé

This article presents local shielding techniques applied to a half-bridge inverter leg with the aim to reduce the common-mode (CM) current noise at converter's dc input. The research study is conducted for 650-V enhancement mode Gallium Nitride power transistor switches. Main contributors of parasitic capacitances referred to the inverter-leg middle point node are identified. Then, shielding solutions are proposed to reduce the CM current emission by these capacitances. Respecting the precautions concerning the isolation of CM currents of the half-bridge inverter leg, the electromagnetic compatibility measurement setup is developed. Experimental step-by-step addition of local shielding copper layers to different contributors of middle point capacitance shows progressive attenuation of CM noise spectra.
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Dates et versions

hal-03816337 , version 1 (16-10-2022)

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Pawel B Derkacz, Jean-Luc Schanen, Pierre-Olivier Jeannin, Piotr J Chrzan, Piotr Musznicki, et al.. EMI Mitigation of GaN Power Inverter Leg by Local Shielding Techniques. IEEE Transactions on Power Electronics, 2022, 37 (10), pp.11996-12004. ⟨10.1109/TPEL.2022.3176943⟩. ⟨hal-03816337⟩
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