Impulse transformer based secondary-side self-powered gate-driver for wide-range PWM operation of SiC power MOSFETs

Garcia, Jorge and Gurpinar, Emre and Castellazzi, Alberto (2016) Impulse transformer based secondary-side self-powered gate-driver for wide-range PWM operation of SiC power MOSFETs. In: 4th IEEE Workshop on Wide Bandgap Power Devices and Applications (WiPDA 2016), 7-9 Nov 2016, Fayetteville, Arkansas, USA.

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Abstract

This work proposes a solution for an isolated gate driver for SiC MOSFETs, based on a magnetic transformer that simultaneously provides to the secondary side the turn-on and turn-off gate signals and the power required for an adequate gate control. This avoids the use of a dedicated DC-DC isolated converter and optocoupler. The original pulse signal is converted into impulses, avoiding transformer saturation at any duty ratio operation. The small size of the resulting transformer enables an overall size reduction vs. conventional solutions (based either in magnetic or optocoupler + power supply). This enables much more compact designs, which are critical in high-power density applications and multilevel converters. After describing the basic operation of the driver, experimental results on a 2kW prototype demonstrate the feasibility of the proposal. It is worth mentioning that this design is also suitable for GaN devices with minor design changes

Item Type: Conference or Workshop Item (Paper)
Additional Information: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Keywords: Power electronics, Wide band-gap devices, gate drivers
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
Related URLs:
Depositing User: Burns, Rebecca
Date Deposited: 24 Mar 2017 11:04
Last Modified: 13 Oct 2017 01:25
URI: http://eprints.nottingham.ac.uk/id/eprint/41509

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