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Gate Drives generating EMI in the absence of Power Converter loading Rev01b.pdf (1.31 MB)

Gate Drives generating EMI in the absence of Power Converter loading

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posted on 15.07.2021, 16:55 by Arnold de Beer
This paper shows how a power converter can generate electromagnetic interference (EMI) through the operation of gate drives only - in the absence of any power conversion. This is due to parasitic capacitances connecting the power semiconductor’s gate to the main circuit. A half bridge converter is used to illustrate this concept. Practical measurements are compared to simulations for an energized and non-energized converter. Even without loading, a converter can exceed regulatory conducted emission EMI limits. This effect is important to consider during the design of converter EMI mitigation - especially for low power converters where the load current is not dominant.

History

Email Address of Submitting Author

asdebeer@uj.ac.za

ORCID of Submitting Author

0000-0002-9154-4112

Submitting Author's Institution

University of Johannesburg

Submitting Author's Country

South Africa