1 / 5

SEB C-S measurements of power IGBTs

SEB C-S measurements of power IGBTs. Viliam Senaj, TE/ABT/FPS RadWG meeting 23/08/2012. Motivation. R eliable operation of LHC dump system - critical importance for machine safety 15 MKD generators per beam using GTO like thyristors

inga
Download Presentation

SEB C-S measurements of power IGBTs

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SEB C-S measurements of power IGBTs Viliam Senaj, TE/ABT/FPS RadWG meeting 23/08/2012

  2. Motivation • Reliable operation of LHC dump system - critical importance for machine safety • 15 MKD generators per beam using GTO like thyristors • GTO are trigged by“power trigger units” operating at up to 3 kV and populated by 3 IGBTs (1.2 kV rated) in series; 360 IGBTs in total for MKDs and 120 for MKBs • SEB of IGBT will provoke “Asynchronous Dump” with associated beam losses and risk of damage of downstream equipments • Replacement of 1.2 kV rated IGBT by 1.7 kV one with similar performance should reduce significantly risk of SEB • SEB measurement to justify replacement costs

  3. IGBT protection against destructive SEB • Reduction of test costs and irradiation facility time by “non-destructive SEB test” – DUT current limitation and voltage cut-off in case of SEB detection • SEB recording by a low frequency data logger (current consumption dip of the assembly of 6 IGBTs due to voltage cut-off on a DUT that experienced an SEB) • Local counter of SEBs – for comparison

  4. Example of data logger recording Example of currrent consumption dips with different durations for SEBs of different IGBTs

  5. SEB Cross-section of IXDN75N120 vs. IXGN100N170 Results of SEB measurement: 1.2 kV IGBTs would result in ~ 4 asynchronous dumps (~10-5 HeH/cm-2.year; 1kV; 360 IGBTs); for 1.7 kV IGBTs factor of ~ 107 less

More Related