Rogers, Daniel J.  ORCID: https://orcid.org/0000-0001-8814-5332 and Lakshmanan, Padmavathi
2015.
Low-inductance snubber arrays for high-power, high-bandwidth switch-mode amplifiers.
Presented at: Applied Power Electronics Conference 2015,
Charlotte, North Carolina, USA,
15-19 March 2015.
IEEE,
pp. 2557-2564.
10.1109/APEC.2015.7104711
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Abstract
This paper presents a low inductance snubber design incorporating a damped DC bus capacitance and multiple RC+RCD cells arranged in two arrays. The design suppresses transient over-voltage peaks seen at the switching transitions in hard-switched, high-frequency switch-mode circuits which are created by an unavoidable interaction between circuit parasitic inductances, IGBT turn-off current slopes and free-wheeling diode reverse recovery currents. The array arrangement allows the use of small surface-mount, ultra-fast diodes by enforcing current sharing between many devices. An industrial application example is presented where the snubber design enables an increase in DC bus voltage from 200 V to 400 V when using 600 V Si IGBT's operated at a switching frequency of 75 kHz.Simulation results are presented and compared to experimental measurements to illustrate the operating principle and effectiveness of the array design.
| Item Type: | Conference or Workshop Item (Poster) |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Engineering |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Uncontrolled Keywords: | Terms—IGBT modules, snubbers, parasitic inductances, switching transients, switched mode power supplies, surface mounting, RC circuits. |
| Publisher: | IEEE |
| Date of First Compliant Deposit: | 30 March 2016 |
| Last Modified: | 28 Oct 2022 09:05 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/73227 |
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