Low capacitive design of planar transformers in high voltage isolated power supply for gate drivers

PCIM Conference 2025 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management ; Nuremberg, Germany ; May 6–8, 2025

Publisher

VDE Verlag

Series or journal

PCIM Europe conference proceedings

Book title

PCIM Conference 2025

ISBN

978-3-8007-6541-6

First page

1129

Last page

1138

Peer-reviewed

✅

Part of the university bibliography

✅

Language

English

Abstract

High voltage (HV) isolation in auxiliary power supplies (APS) has been most commonly achieved with the help of transformers. It has been mandated by standards to have sufficient clearance and creepage for such HV designs, which often increases the APS volume. For low power HV applications, for example, in isolated gate driver units, replacing toroidal cores with planar transformers can help reduce both the volume and material costs of the APS. However, with compactness the resulting high parasitic capacitance from the transformer primary to secondary can cause high common mode noise, and therefore should be mitigated. In this work, such designs meant for low power transformers are investigated, evaluated and compared.

Version

Published version

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